l3build (10jan18)

git-svn-id: svn://tug.org/texlive/trunk@46283 c570f23f-e606-0410-a88d-b1316a301751

16 files changed, 3526 insertions, 2492 deletions

diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-arguments.lua b/Master/texmf-dist/tex/latex/l3build/l3build-arguments.lua
new file mode 100644
index 00000000000..83129a071f4
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-arguments.lua
@@ -0,0 +1,276 @@
+--[[
+
+File l3build-arguments.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+local exit             = os.exit
+local stderr           = io.stderr
+
+-- Parse command line options
+
+option_list =
+  {
+    config =
+      {
+        desc  = "Sets the config(s) used for running tests",
+        short = "c",
+        type  = "table"
+      },
+    date =
+      {
+        desc  = "Sets the date to insert into sources",
+        type  = "string"
+      },
+    ["dry-run"] =
+      {
+        desc = "Dry run for install",
+        type = "boolean"
+      },
+    engine =
+      {
+        desc  = "Sets the engine(s) to use for running test",
+        short = "e",
+        type  = "table"
+      },
+    epoch =
+      {
+        desc  = "Sets the epoch for tests and typesetting",
+        type  = "string"
+      },
+    force =
+      {
+        desc  = "Force tests to run if engine is not set up",
+        short = "f",
+        type  = "boolean"
+      },
+    ["halt-on-error"] =
+      {
+        desc  = "Stops running tests after the first failure",
+        short = "H",
+        type  = "boolean"
+      },
+    help =
+      {
+        short = "h",
+        type  = "boolean"
+      },
+    pdf =
+      {
+        desc  = "Check/save PDF files",
+        short = "p",
+        type  = "boolean"
+      },
+    quiet =
+      {
+        desc  = "Suppresses TeX output when unpacking",
+        short = "q",
+        type  = "boolean"
+      },
+    rerun =
+      {
+        desc  = "Skip setup: simply rerun tests",
+        type  = "boolean"
+      },
+    shuffle =
+      {
+        desc  = "Shuffle order of tests",
+        type  = "boolean"
+      },
+    texmfhome =
+      {
+        desc = "Location of user texmf tree",
+        type = "string"
+      },
+    version =
+      {
+        desc  = "Sets the version to insert into sources",
+        short = "v",
+        type  = "string"
+      },
+  }
+
+-- This is done as a function (rather than do ... end) as it allows early
+-- termination (break)
+local function argparse()
+  local result = { }
+  local files  = { }
+  local long_options =  { }
+  local short_options = { }
+  -- Turn long/short options into two lookup tables
+  for k,v in pairs(option_list) do
+    if v["short"] then
+      short_options[v["short"]] = k
+    end
+    long_options[k] = k
+  end
+  local args = args
+  -- arg[1] is a special case: must be a command or "-h"/"--help"
+  -- Deal with this by assuming help and storing only apparently-valid
+  -- input
+  local a = arg[1]
+  result["target"] = "help"
+  if a then
+    -- No options are allowed in position 1, so filter those out
+    if not string.match(a, "^%-") then
+      result["target"] = a
+    end
+  end
+  -- Stop here if help is required
+  if result["target"] == "help" then
+    return result
+  end
+  -- An auxiliary to grab all file names into a table
+  local function remainder(num)
+    local files = { }
+    for i = num, #arg do
+      table.insert(files, arg[i])
+    end
+    return files
+  end
+  -- Examine all other arguments
+  -- Use a while loop rather than for as this makes it easier
+  -- to grab arg for optionals where appropriate
+  local i = 2
+  while i <= #arg do
+    local a = arg[i]
+    -- Terminate search for options
+    if a == "--" then
+      files = remainder(i + 1)
+      break
+    end
+    -- Look for optionals
+    local opt
+    local optarg
+    local opts
+    -- Look for and option and get it into a variable
+    if string.match(a, "^%-") then
+      if string.match(a, "^%-%-") then
+        opts = long_options
+        local pos = string.find(a, "=", 1, true)
+        if pos then
+          opt    = string.sub(a, 3, pos - 1)
+          optarg = string.sub(a, pos + 1)
+        else
+          opt = string.sub(a, 3)
+        end
+      else
+        opts = short_options
+        opt  = string.sub(a, 2, 2)
+        -- Only set optarg if it is there
+        if #a > 2 then
+          optarg = string.sub(a, 3)
+        end
+      end
+      -- Now check that the option is valid and sort out the argument
+      -- if required
+      local optname = opts[opt]
+      if optname then
+        -- Tidy up arguments
+        if option_list[optname]["type"] == "boolean" then
+          if optarg then
+            local opt = "-" .. (string.match(a, "^%-%-") and "-" or "") .. opt
+            stderr:write("Value not allowed for option " .. opt .."\n")
+            return {"help"}
+          end
+        else
+         if not optarg then
+          optarg = arg[i + 1]
+          if not optarg then
+            stderr:write("Missing value for option " .. a .."\n")
+            return {"help"}
+          end
+          i = i + 1
+         end
+        end
+      else
+        stderr:write("Unknown option " .. a .."\n")
+        return {"help"}
+      end
+      -- Store the result
+      if optarg then
+        if option_list[optname]["type"] == "string" then
+          result[optname] = optarg
+        else
+          local opts = result[optname] or { }
+          for hit in string.gmatch(optarg, "([^,%s]+)") do
+            table.insert(opts, hit)
+          end
+          result[optname] = opts
+        end
+      else
+        result[optname] = true
+      end
+      i = i + 1
+    end
+    if not opt then
+      files = remainder(i)
+      break
+    end
+  end
+  if next(files) then
+   result["files"] = files
+  end
+  return result
+end
+
+options = argparse()
+
+-- Sanity check
+if options["engine"] and not options["force"] then
+   -- Make a lookup table
+   local t = { }
+  for _, engine in pairs(checkengines) do
+    t[engine] = true
+  end
+  for _, engine in pairs(options["engine"]) do
+    if not t[engine] then
+      print("\n! Error: Engine \"" .. engine .. "\" not set up for testing!")
+      print("\n  Valid values are:")
+      for _, engine in ipairs(checkengines) do
+        print("  - " .. engine)
+      end
+      print("")
+      exit(1)
+    end
+  end
+end
+
+-- Tidy up the epoch setting
+-- Force an epoch if set at the command line
+if options["epoch"] then
+  epoch           = options["epoch"]
+  forcecheckepoch = true
+  forcedocepoch   = true
+end
+-- If given as an ISO date, turn into an epoch number
+do
+  local y, m, d = string.match(epoch, "^(%d%d%d%d)-(%d%d)-(%d%d)$")
+  if y then
+    epoch =
+      os_time({year = y, month = m, day = d, hour = 0, sec = 0, isdst = nil}) -
+      os_time({year = 1970, month = 1, day = 1, hour = 0, sec = 0, isdst = nil})
+  elseif string.match(epoch, "^%d+$") then
+    epoch = tonumber(epoch)
+  else
+    epoch = 0
+  end
+end
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-aux.lua b/Master/texmf-dist/tex/latex/l3build/l3build-aux.lua
new file mode 100644
index 00000000000..102f9ba83be
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-aux.lua
@@ -0,0 +1,96 @@
+--[[
+
+File l3build-aux.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+--
+-- Auxiliary functions which are used by more than one main function
+--
+
+function setepoch()
+  return
+    os_setenv .. " SOURCE_DATE_EPOCH=" .. epoch
+      .. os_concat ..
+    os_setenv .. " SOURCE_DATE_EPOCH_TEX_PRIMITIVES=1"
+      .. os_concat ..
+    os_setenv .. " FORCE_SOURCE_DATE=1"
+      .. os_concat
+end
+
+-- Do some subtarget for all modules in a bundle
+function call(dirs, target, opts)
+  -- Turn the option table into a string
+  local opts = opts or options
+  local s = ""
+  for k,v in pairs(opts) do
+    if k ~= "files" and k ~= "target" then -- Special cases
+      local t = option_list[k] or { }
+      local arg = ""
+      if t["type"] == "string" then
+        arg = arg .. "=" .. v
+      end
+      if t["type"] == "table" then
+        for _,a in pairs(v) do
+          if arg == "" then
+            arg = "=" .. a -- Add the initial "=" here
+          else
+            arg = arg .. "," .. a
+          end
+        end
+      end
+      s = s .. " --" .. k .. arg
+    end
+  end
+  if opts["files"] then
+    for _,v in pairs(opts["files"]) do
+      s = s .. " " .. v
+    end
+  end
+  for _,i in ipairs(dirs) do
+    print(
+      "Running script " .. scriptname .. " with target \"" .. target
+        .. "\" for module "
+        .. i
+    )
+    local errorlevel = run(
+      i,
+      "texlua " .. scriptname .. " " .. target .. s
+    )
+    if errorlevel ~= 0 then
+      return errorlevel
+    end
+  end
+  return 0
+end
+
+-- Unpack files needed to support testing/typesetting/unpacking
+function depinstall(deps)
+  local errorlevel
+  for _,i in ipairs(deps) do
+    print("Installing dependency: " .. i)
+    errorlevel = run(i, "texlua " .. scriptname .. " unpack -q")
+    if errorlevel ~= 0 then
+      return errorlevel
+    end
+  end
+  return 0
+end
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-check.lua b/Master/texmf-dist/tex/latex/l3build/l3build-check.lua
new file mode 100644
index 00000000000..617fa56a0c6
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-check.lua
@@ -0,0 +1,842 @@
+--[[
+
+File l3build-check.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+-- Local access to functions
+local open             = io.open
+local close            = io.close
+local write            = io.write
+local output           = io.output
+
+local rnd              = math.random
+
+local len              = string.len
+local char             = string.char
+local format           = string.format
+local gmatch           = string.gmatch
+local gsub             = string.gsub
+local match            = string.match
+
+local sort             = table.sort
+
+local utf8_char        = unicode.utf8.char
+
+local exit             = os.exit
+local execute          = os.execute
+
+--
+-- Auxiliary functions which are used by more than one main function
+--
+
+-- Set up the check system files: needed for checking one or more tests and
+-- for saving the test files
+function checkinit()
+  cleandir(testdir)
+  depinstall(checkdeps)
+  -- Copy dependencies to the test directory itself: this makes the paths
+  -- a lot easier to manage, and is important for dealing with the log and
+  -- with file input/output tests
+  for _,i in ipairs(filelist(localdir)) do
+    cp(i, localdir, testdir)
+  end
+  bundleunpack({sourcefiledir, testfiledir})
+  for _,i in ipairs(installfiles) do
+    cp(i, unpackdir, testdir)
+  end
+  for _,i in ipairs(checkfiles) do
+    cp(i, unpackdir, testdir)
+  end
+  if direxists(testsuppdir) then
+    for _,i in ipairs(filelist(testsuppdir)) do
+      cp(i, testsuppdir, testdir)
+    end
+  end
+  for _,i in ipairs(checksuppfiles) do
+    cp(i, supportdir, testdir)
+  end
+  execute(os_ascii .. ">" .. testdir .. "/ascii.tcx")
+end
+
+-- Convert the raw log file into one for comparison/storage: keeps only
+-- the 'business' part from the tests and removes system-dependent stuff
+local function formatlog(logfile, newfile, engine, errlevels)
+  local maxprintline = maxprintline
+  if engine == "luatex" or engine == "luajittex" then
+    maxprintline = maxprintline + 1 -- Deal with an out-by-one error
+  end
+  local function killcheck(line)
+      -- Skip lines containing file dates
+      if match(line, "[^<]%d%d%d%d/%d%d/%d%d") then
+        return true
+      elseif
+      -- Skip \openin/\openout lines in web2c 7.x
+      -- As Lua doesn't allow "(in|out)", a slightly complex approach:
+      -- do a substitution to check the line is exactly what is required!
+        match(
+          gsub(line, "^\\openin", "\\openout"), "^\\openout%d%d? = "
+        ) then
+        return true
+      end
+    return false
+  end
+    -- Substitutions to remove some non-useful changes
+  local function normalize(line, lastline)
+    -- Zap line numbers from \show, \showbox, \box_show and the like:
+    -- do this before wrapping lines
+    line = gsub(line, "^l%.%d+ ", "l. ...")
+    -- Also from lua stack traces.
+    line = gsub(line, "lua:%d+: in function", "lua:...: in function")
+    -- Allow for wrapped lines: preserve the content and wrap
+    -- Skip lines that have an explicit marker for truncation
+    if len(line) == maxprintline  and
+       not match(line, "%.%.%.$") then
+      return "", (lastline or "") .. line
+    end
+    local line = (lastline or "") .. line
+    lastline = ""
+    -- Zap ./ at begin of filename
+    line = gsub(line, "%(%.%/", "(")
+    -- Zap paths if places other than 'here' are accessible
+    if checksearch then
+      -- The pattern excludes < and > as the image part can have
+      -- several entries on one line
+      local pattern = "%w?:?/[^ %<%>]*/([^/%(%)]*%.%w*)"
+      -- Files loaded from TeX: all start ( -- )
+      line = gsub(line, "%(" .. pattern, "(../%1")
+      -- Images
+      line = gsub(line, "<" .. pattern .. ">", "<../%1>")
+      -- luaotfload files start with keywords
+      line = gsub(line, "from " .. pattern .. "%(", "from. ./%1(")
+      line = gsub(line, ": " .. pattern .. "%)", ": ../%1)")
+      -- Deal with XeTeX specials
+      if match(line, "^%.+\\XeTeX.?.?.?file") then
+        line = gsub(line, pattern, "../%1")
+      end
+    end
+    -- Deal with the fact that "(.aux)" may have still a leading space
+    line = gsub(line, "^ %(%.aux%)", "(.aux)")
+    -- Merge all of .fd data into one line so will be removed later
+    if match(line, "^ *%([%.%/%w]+%.fd[^%)]*$") then
+      lastline = (lastline or "") .. line
+      return "", (lastline or "") .. line
+    end
+    -- TeX90/XeTeX knows only the smaller set of dimension units
+    line = gsub(
+      line,
+      "cm, mm, dd, cc, bp, or sp", "cm, mm, dd, cc, nd, nc, bp, or sp"
+    )
+    -- Normalise a case where fixing a TeX bug changes the message text
+    line = gsub(line, "\\csname\\endcsname ", "\\csname\\endcsname")
+    -- Zap "on line <num>" and replace with "on line ..."
+    -- Two similar cases, Lua patterns mean we need to do them separately
+    line = gsub(line, "on line %d*", "on line ...")
+    line = gsub(line, "on input line %d*", "on input line ...")
+    -- Tidy up to ^^ notation
+    for i = 0, 31 do
+      line = gsub(line, char(i), "^^" .. char(64 + i))
+    end
+    -- Normalise register allocation to hard-coded numbers
+    -- No regex, so use a pattern plus lookup approach
+    local register_types = {
+        attribute      = true,
+        box            = true,
+        bytecode       = true,
+        catcodetable   = true,
+        count          = true,
+        dimen          = true,
+        insert         = true,
+        language       = true,
+        luabytecode    = true,
+        luachunk       = true,
+        luafunction    = true,
+        marks          = true,
+        muskip         = true,
+        read           = true,
+        skip           = true,
+        toks           = true,
+        whatsit        = true,
+        write          = true,
+        XeTeXcharclass = true
+      }
+    if register_types[match(line, "^\\[^%]]+=\\([a-z]+)%d+$")] then
+      line = gsub(line, "%d+$", "...")
+    end
+    -- Also deal with showing boxes
+    if match(line, "^> \\box%d+=$") or match(line, "^> \\box%d+=(void)$") then
+      line = gsub(line, "%d+=", "...=")
+    end
+    -- Remove 'normal' direction information on boxes with (u)pTeX
+    line = gsub(line, ",? yoko direction,?", "")
+    line = gsub(line, ",? yoko%(math%) direction,?", "")
+    -- Remove the \special line that in DVI mode keeps PDFs comparable
+    if match(line, "^%.*\\special%{pdf: docinfo << /Creator") then
+      return ""
+    end
+    -- Remove the \special line possibly present in DVI mode for paper size
+    if match(line, "^%.*\\special%{papersize") then
+      return ""
+    end
+    -- Remove ConTeXt stuff
+    if match(line, "^backend         >") or
+       match(line, "^close source    >") or
+       match(line, "^mkiv lua stats  >") or
+       match(line, "^pages           >") or
+       match(line, "^system          >") or
+       match(line, "^used file       >") or
+       match(line, "^used option     >") or
+       match(line, "^used structure  >") then
+       return ""
+    end
+    -- A tidy-up to keep LuaTeX and other engines in sync
+    line = gsub(line, utf8_char(127), "^^?")
+    -- Unicode engines display chars in the upper half of the 8-bit range:
+    -- tidy up to match pdfTeX if an ASCII engine is in use
+    if next(asciiengines) then
+      for i = 128, 255 do
+        line = gsub(line, utf8_char(i), "^^" .. format("%02x", i))
+      end
+    end
+    return line, lastline
+  end
+  local lastline = ""
+  local newlog = ""
+  local prestart = true
+  local skipping = false
+  -- Read the entire log file as a binary: deals with ^@/^[, etc.
+  local file = assert(open(logfile, "rb"))
+  local contents = gsub(file:read("*all") .. "\n", "\r\n", "\n")
+  close(file)
+  for line in gmatch(contents, "([^\n]*)\n") do
+    if line == "START-TEST-LOG" then
+      prestart = false
+    elseif line == "END-TEST-LOG" or
+      match(line, "^Here is how much of .?.?.?TeX\'s memory you used:") then
+      break
+    elseif line == "OMIT" then
+      skipping = true
+    elseif match(line, "^%)?TIMO$") then
+      skipping = false
+    elseif not prestart and not skipping then
+      line, lastline = normalize(line, lastline)
+      if not match(line, "^ *$") and not killcheck(line) then
+        newlog = newlog .. line .. os_newline
+      end
+    end
+  end
+  local newfile = open(newfile, "w")
+  output(newfile)
+  write(newlog)
+  if recordstatus then
+    write('***************\n')
+    for i = 1, checkruns do
+      write('Compilation ' .. i .. ' of test file completed with exit status ' .. errlevels[i] .. '\n')
+    end
+  end
+  close(newfile)
+end
+
+-- Additional normalization for LuaTeX
+local function formatlualog(logfile, newfile)
+  local function normalize(line, lastline, dropping)
+    -- Find \discretionary or \whatsit lines:
+    -- These may come back later
+    if match(line, "^%.+\\discretionary$")                or
+       match(line, "^%.+\\discretionary %(penalty 50%)$") or
+       match(line, "^%.+\\discretionary50%|$")            or
+       match(line, "^%.+\\discretionary50%| replacing $") or
+       match(line, "^%.+\\whatsit$")                      then
+      return "", line
+    end
+    -- For \mathon, we always need this line but the next
+    -- may be affected
+    if match(line, "^%.+\\mathon$") then
+      return line, line
+    end
+    -- LuaTeX has a flexible output box
+    line = gsub(line,"\\box\\outputbox", "\\box255")
+    -- LuaTeX identifies spaceskip glue
+    line = gsub(line,"%(\\spaceskip%) ", " ")
+    -- Remove 'display' at end of display math boxes:
+    -- LuaTeX omits this as it includes direction in all cases
+    line = gsub(line, "(\\hbox%(.*), display$", "%1")
+    -- Remove 'normal' direction information on boxes:
+    -- any bidi/vertical stuff will still show
+    line = gsub(line, ", direction TLT", "")
+    -- Find glue setting and round out the last place
+    local function round_digits(l, m)
+      return gsub(
+        l,
+        m .. " (%-?)%d+%.%d+",
+        m .. " %1"
+          .. format(
+            "%.3f",
+            match(line, m .. " %-?(%d+%.%d+)") or 0
+          )
+      )
+    end
+    if match(line, "glue set %-?%d+%.%d+") then
+      line = round_digits(line, "glue set")
+    end
+    if match(
+        line, "glue %-?%d+%.%d+ plus %-?%d+%.%d+ minus %-?%d+%.%d+$"
+      )
+      then
+      line = round_digits(line, "glue")
+      line = round_digits(line, "plus")
+      line = round_digits(line, "minus")
+    end
+    -- LuaTeX writes ^^M as a new line, which we lose
+    line = gsub(line, "%^%^M", "")
+    -- Remove U+ notation in the "Missing character" message
+    line = gsub(
+        line,
+        "Missing character: There is no (%^%^..) %(U%+(....)%)",
+        "Missing character: There is no %1"
+      )
+    -- The first time a new font is used, it shows up
+    -- as being cached
+    line = gsub(line, "(save cache:", "(load cache:")
+    -- A function to handle the box prefix part
+    local function boxprefix(s)
+      return gsub(match(s, "^(%.+)"), "%.", "%%.")
+    end
+    -- 'Recover' some discretionary data
+    if match(lastline, "^%.+\\discretionary %(penalty 50%)$") and
+       match(line, boxprefix(lastline) .. "%.= ") then
+       return gsub(line, "%.= ", ""),""
+    end
+    -- Where the last line was a discretionary, looks for the
+    -- info one level in about what it represents
+    if match(lastline, "^%.+\\discretionary$")                or
+       match(lastline, "^%.+\\discretionary %(penalty 50%)$") or
+       match(lastline, "^%.+\\discretionary50%|$")            or
+       match(lastline, "^%.+\\discretionary50%| replacing $") then
+      local prefix = boxprefix(lastline)
+      if match(line, prefix .. "%.") or
+         match(line, prefix .. "%|") then
+         if match(lastline, " replacing $") and
+            not dropping then
+           -- Modify the return line
+           return gsub(line, "^%.", ""), lastline, true
+         else
+           return "", lastline, true
+         end
+      else
+        if dropping then
+          -- End of a \discretionary block
+          return line, ""
+        else
+          -- Not quite a normal discretionary
+          if match(lastline, "^%.+\\discretionary50%|$") then
+            lastline =  gsub(lastline, "50%|$", "")
+          end
+          -- Remove some info that TeX90 lacks
+          lastline = gsub(lastline, " %(penalty 50%)$", "")
+          -- A normal (TeX90) discretionary:
+          -- add with the line break reintroduced
+          return lastline .. os_newline .. line, ""
+        end
+      end
+    end
+    -- Look for another form of \discretionary, replacing a "-"
+    pattern = "^%.+\\discretionary replacing *$"
+    if match(line, pattern) then
+      return "", line
+    else
+      if match(lastline, pattern) then
+        local prefix = boxprefix(lastline)
+        if match(line, prefix .. "%.\\kern") then
+          return gsub(line, "^%.", ""), lastline, true
+        elseif dropping then
+          return "", ""
+        else
+          return lastline .. os_newline .. line, ""
+        end
+      end
+    end
+    -- For \mathon, if the current line is an empty \hbox then
+    -- drop it
+    if match(lastline, "^%.+\\mathon$") then
+      local prefix = boxprefix(lastline)
+      if match(line, prefix .. "\\hbox%(0%.0%+0%.0%)x0%.0$") then
+        return "", ""
+      end
+    end
+    -- Various \local... things that other engines do not do:
+    -- Only remove the no-op versions
+    if match(line, "^%.+\\localpar$")                or
+       match(line, "^%.+\\localinterlinepenalty=0$") or
+       match(line, "^%.+\\localbrokenpenalty=0$")    or
+       match(line, "^%.+\\localleftbox=null$")       or
+       match(line, "^%.+\\localrightbox=null$")      then
+       return "", ""
+    end
+    -- Older LuaTeX versions set the above up as a whatsit
+    -- (at some stage this can therefore go)
+    if match(lastline, "^%.+\\whatsit$") then
+      local prefix = boxprefix(lastline)
+      if match(line, prefix .. "%.") then
+        return "", lastline, true
+      else
+        -- End of a \whatsit block
+        return line, ""
+      end
+    end
+    -- Wrap some cases that can be picked out
+    -- In some places LuaTeX does use max_print_line, then we
+    -- get into issues with different wrapping approaches
+    if len(line) == maxprintline then
+      return "", lastline .. line
+    elseif len(lastline) == maxprintline then
+      if match(line, "\\ETC%.%}$") then
+        -- If the line wrapped at \ETC we might have lost a space
+        return lastline
+          .. ((match(line, "^\\ETC%.%}$") and " ") or "")
+          .. line, ""
+      elseif match(line, "^%}%}%}$") then
+        return lastline .. line, ""
+      else
+        return lastline .. os_newline .. line, ""
+      end
+    -- Return all of the text for a wrapped (multi)line
+    elseif len(lastline) > maxprintline then
+      return lastline .. line, ""
+    end
+    -- Remove spaces at the start of lines: deals with the fact that LuaTeX
+    -- uses a different number to the other engines
+    return gsub(line, "^%s+", ""), ""
+  end
+  local newlog = ""
+  local lastline = ""
+  local dropping = false
+  -- Read the entire log file as a binary: deals with ^@/^[, etc.
+  local file = assert(open(logfile, "rb"))
+  local contents = gsub(file:read("*all") .. "\n", "\r\n", "\n")
+  close(file)
+  for line in gmatch(contents, "([^\n]*)\n") do
+    line, lastline, dropping = normalize(line, lastline, dropping)
+    if not match(line, "^ *$") then
+      newlog = newlog .. line .. os_newline
+    end
+  end
+  local newfile = open(newfile, "w")
+  output(newfile)
+  write(newlog)
+  close(newfile)
+end
+
+-- Run one test which may have multiple engine-dependent comparisons
+-- Should create a difference file for each failed test
+function runcheck(name, hide)
+  local checkengines = checkengines
+  if options["engine"] then
+    checkengines = options["engine"]
+  end
+  local errorlevel = 0
+  for _,i in ipairs(checkengines) do
+    -- Allow for luatex == luajittex for .tlg purposes
+    local engine = i
+    if i == "luajittex" then
+      engine = "luatex"
+    end
+    checkpdf = setup_check(name, engine)
+    runtest(name, i, hide, lvtext, checkpdf)
+    -- Generation of results depends on test type
+    local errlevel
+    if checkpdf then
+      errlevel = compare_pdf(name, engine)
+    else
+      errlevel = compare_tlg(name, engine)
+    end
+    if errlevel ~= 0 and options["halt-on-error"] then
+      showfaileddiff()
+      if errlevel ~= 0 then
+        return 1
+      end
+    end
+    if errlevel > errorlevel then
+      errorlevel = errlevel
+    end
+  end
+  return errorlevel
+end
+
+function setup_check(name, engine)
+  local testname = name .. "." .. engine
+  local pdffile = locate(
+    {testfiledir, unpackdir},
+    {testname .. pdfext, name .. pdfext}
+  )
+  local tlgfile = locate(
+    {testfiledir, unpackdir},
+    {testname .. tlgext, name .. tlgext}
+  )
+  -- Attempt to generate missing reference file from expectation
+  if not (pdffile or tlgfile) then
+    if not locate({unpackdir, testfiledir}, {name .. lveext}) then
+      print(
+        "Error: failed to find " .. pdfext .. ", " .. tlgext .. " or "
+          .. lveext .. " file for " .. name .. "!"
+      )
+      exit(1)
+    end
+    runtest(name, engine, true, lveext, true)
+    pdffile = testdir .. "/" .. testname .. pdfext
+    -- If a PDF is generated use it for comparisons
+    if not fileexists(pdffile) then
+      pdffile = nil
+      ren(testdir, testname .. logext, testname .. tlgext)
+    end
+  else
+    -- Install comparison files found
+    for _,v in pairs({pdffile, tlgfile}) do
+      if v then
+        cp(
+          match(v, ".*/(.*)"),
+          match(v, "(.*)/.*"),
+          testdir
+        )
+      end
+    end
+  end
+  if pdffile then
+    local pdffile = match(pdffile, ".*/(.*)")
+    ren(
+      testdir,
+      pdffile,
+      gsub(pdffile, pdfext .. "$", ".ref" .. pdfext)
+    )
+    return true
+  else
+    return false
+  end
+end
+
+function compare_pdf(name, engine)
+  local errorlevel
+  local testname = name .. "." .. engine
+  local cmpfile    = testdir .. "/" .. testname .. os_cmpext
+  local pdffile    = testdir .. "/" .. testname .. pdfext
+  local refpdffile = locate(
+    {testdir}, {testname .. ".ref" .. pdfext, name .. ".ref" .. pdfext}
+  )
+  if not refpdffile then
+    return
+  end
+  if os_type == "windows" then
+    refpdffile = unix_to_win(refpdffile)
+  end
+  errorlevel = execute(
+    os_cmpexe .. " " .. refpdffile .. " " .. pdffile .. " > " .. cmpfile
+  )
+  if errorlevel == 0 then
+    os.remove(cmpfile)
+  end
+  return errorlevel
+end
+
+function compare_tlg(name, engine)
+  local errorlevel
+  local testname = name .. "." .. engine
+  local difffile = testdir .. "/" .. testname .. os_diffext
+  local logfile  = testdir .. "/" .. testname .. logext
+  local tlgfile  = locate({testdir}, {testname .. tlgext, name .. tlgext})
+  if not tlgfile then
+    return
+  end
+  if os_type == "windows" then
+    tlgfile = unix_to_win(tlgfile)
+  end
+  -- Do additional log formatting if the engine is LuaTeX, there is no
+  -- LuaTeX-specific .tlg file and the default engine is not LuaTeX
+  if engine == "luatex"
+    and not match(tlgfile, "%.luatex" .. "%" .. tlgext)
+    and stdengine ~= "luatex"
+    and stdengine ~= "luajittex"
+    then
+    local luatlgfile = testdir .. "/" .. name .. ".luatex" ..  tlgext
+    if os_type == "windows" then
+      luatlgfile = unix_to_win(luatlgfile)
+    end
+    formatlualog(tlgfile, luatlgfile)
+    formatlualog(logfile, logfile)
+    -- This allows code sharing below: we only need the .tlg name in one place
+    tlgfile = luatlgfile
+  end
+  errorlevel = execute(
+    os_diffexe .. " " .. tlgfile .. " " .. logfile .. " > " .. difffile
+  )
+  if errorlevel == 0 then
+    os.remove(difffile)
+  end
+  return errorlevel
+end
+
+-- Run one of the test files: doesn't check the result so suitable for
+-- both creating and verifying .tlg files
+function runtest(name, engine, hide, ext, makepdf)
+  local lvtfile = name .. (ext or lvtext)
+  cp(lvtfile, fileexists(testfiledir .. "/" .. lvtfile)
+    and testfiledir or unpackdir, testdir)
+  local engine = engine or stdengine
+  -- Set up the format file name if it's one ending "...tex"
+  local realengine = engine
+  local format
+  if
+    match(checkformat, "tex$") and
+    not match(engine, checkformat) then
+    format = " -fmt=" .. gsub(engine, "(.*)tex$", "%1") .. checkformat
+  else
+    format = ""
+  end
+  -- Special casing for e-LaTeX format
+  if
+    match(checkformat, "^latex$") and
+    match(engine, "^etex$") then
+    format = " -fmt=latex"
+  end
+  -- Special casing for (u)pTeX LaTeX formats
+  if
+    match(checkformat, "^latex$") and
+    match(engine, "^u?ptex$") then
+    realengine = "e" .. engine
+  end
+  -- Special casing for XeTeX engine
+  local checkopts = checkopts
+  if match(engine, "xetex") and not makepdf then
+    checkopts = checkopts .. " -no-pdf"
+  end
+  -- Special casing for ConTeXt
+  if match(checkformat, "^context$") then
+    format = ""
+    if engine == "luatex" or engine == "luajittex" then
+      realengine = "context"
+    elseif engine == "pdftex" then
+      realengine = "texexec"
+    elseif engine == "xetex" then
+      realengine = "texexec --xetex"
+    else
+      print("Engine incompatible with format")
+      exit(1)
+    end
+  end
+  local logfile = testdir .. "/" .. name .. logext
+  local newfile = testdir .. "/" .. name .. "." .. engine .. logext
+  local asciiopt = ""
+  for _,i in ipairs(asciiengines) do
+    if realengine == i then
+      asciiopt = "-translate-file ./ascii.tcx "
+      break
+    end
+  end
+  local errlevels = {}
+  for i = 1, checkruns do
+    errlevels[i] = run(
+      testdir,
+      -- No use of localdir here as the files get copied to testdir:
+      -- avoids any paths in the logs
+      os_setenv .. " TEXINPUTS=." .. (checksearch and os_pathsep or "")
+        .. os_concat ..
+      -- Avoid spurious output from (u)pTeX
+      os_setenv .. " GUESS_INPUT_KANJI_ENCODING=0"
+        .. os_concat ..
+      (forcecheckepoch and setepoch() or "") ..
+      -- Ensure lines are of a known length
+      os_setenv .. " max_print_line=" .. maxprintline
+        .. os_concat ..
+      realengine ..  format .. " "
+        .. checkopts .. " " .. asciiopt .. lvtfile
+        .. (hide and (" > " .. os_null) or "")
+        .. os_concat ..
+      runtest_tasks(jobname(lvtfile))
+    )
+  end
+  if makepdf and fileexists(testdir .. "/" .. name .. dviext) then
+    dvitopdf(name, testdir, engine, hide)
+  end
+  formatlog(logfile, newfile, engine, errlevels)
+  -- Store secondary files for this engine
+  for _,filetype in pairs(auxfiles) do
+    for _,file in pairs(filelist(testdir, filetype)) do
+      if match(file,"^" .. name) then
+        local ext = match(file, "%.[^.]+$")
+        if ext ~= lvtext and
+           ext ~= tlgext and
+           ext ~= lveext and
+           ext ~= logext then
+           ren(testdir, file, gsub(file, "(%.[^.]+)$", "." .. engine .. "%1"))
+        end
+      end
+    end
+  end
+end
+
+-- A hook to allow additional tasks to run for the tests
+runtest_tasks = runtest_tasks or function(name)
+  return ""
+end
+
+-- Look for a test: could be in the testfiledir or the unpackdir
+function testexists(test)
+  return(locate({testfiledir, unpackdir}, {test .. lvtext}))
+end
+
+-- Standard versions of the main targets for building modules
+
+function check(names)
+  local errorlevel = 0
+  if testfiledir ~= "" and direxists(testfiledir) then
+    if not options["rerun"] then
+      checkinit()
+    end
+    local hide = true
+    if names and next(names) then
+      hide = false
+    end
+    names = names or { }
+    -- No names passed: find all test files
+    if not next(names) then
+      for _,i in pairs(filelist(testfiledir, "*" .. lvtext)) do
+        table.insert(names, jobname(i))
+      end
+      for _,i in ipairs(filelist(unpackdir, "*" .. lvtext)) do
+        if fileexists(testfiledir .. "/" .. i) then
+          print("Duplicate test file: " .. i)
+          return 1
+        else
+          table.insert(names, jobname(i))
+        end
+      end
+      sort(names)
+    end
+    -- https://stackoverflow.com/a/32167188
+    local function shuffle(tbl)
+      local len, random = #tbl, rnd
+      for i = len, 2, -1 do
+          local j = random(1, i)
+          tbl[i], tbl[j] = tbl[j], tbl[i]
+      end
+      return tbl
+    end
+    if options["shuffle"] then
+      names = shuffle(names)
+    end
+    -- Actually run the tests
+    print("Running checks on")
+    local i = 0
+    for _,name in ipairs(names) do
+      i = i + 1
+      print("  " .. name .. " (" ..  i.. "/" .. #names ..")")
+      local errlevel = runcheck(name, hide)
+      -- Return value must be 1 not errlevel
+      if errlevel ~= 0 then
+        if options["halt-on-error"] then
+          return 1
+        else
+          errorlevel = 1
+          -- visually show that something has failed
+          print("          --> failed\n")
+        end
+      end
+    end
+    if errorlevel ~= 0 then
+      checkdiff()
+    else
+      print("\n  All checks passed\n")
+    end
+  end
+  return errorlevel
+end
+
+-- A short auxiliary to print the list of differences for check
+function checkdiff()
+  print("\n  Check failed with difference files")
+  for _,i in ipairs(filelist(testdir, "*" .. os_diffext)) do
+    print("  - " .. testdir .. "/" .. i)
+  end
+  for _,i in ipairs(filelist(testdir, "*" .. os_cmpext)) do
+    print("  - " .. testdir .. "/" .. i)
+  end
+  print("")
+end
+
+function showfaileddiff()
+  print("\nCheck failed with difference file")
+  for _,i in ipairs(filelist(testdir, "*" .. os_diffext)) do
+    print("  - " .. testdir .. "/" .. i)
+    print("")
+    local f = open(testdir .. "/" .. i,"r")
+    local content = f:read("*all")
+    close(f)
+    print("-----------------------------------------------------------------------------------")
+    print(content)
+    print("-----------------------------------------------------------------------------------")
+  end
+  for _,i in ipairs(filelist(testdir, "*" .. os_cmpext)) do
+    print("  - " .. testdir .. "/" .. i)
+  end
+end
+
+function save(names)
+  checkinit()
+  local engines = options["engine"] or {stdengine}
+  for _,name in pairs(names) do
+    local engine
+    for _,engine in pairs(engines) do
+      local tlgengine = ((engine == stdengine and "") or "." .. engine)
+      local tlgfile  = name .. tlgengine .. tlgext
+      local spdffile = name .. tlgengine .. pdfext
+      local newfile  = name .. "." .. engine .. logext
+      local pdffile  = name .. "." .. engine .. pdfext
+      local refext = ((options["pdf"] and pdfext) or tlgext)
+      if testexists(name) then
+        print("Creating and copying " .. refext)
+        runtest(name, engine, false, lvtext, options["pdf"])
+        if options["pdf"] then
+          ren(testdir, pdffile, spdffile)
+          cp(spdffile, testdir, testfiledir)
+        else
+          ren(testdir, newfile, tlgfile)
+          cp(tlgfile, testdir, testfiledir)
+        end
+        if fileexists(unpackdir .. "/" .. tlgfile) then
+          print(
+            "Saved " .. tlgext
+              .. " file overrides unpacked version of the same name"
+          )
+        end
+      elseif locate({unpackdir, testfiledir}, {name .. lveext}) then
+        print(
+          "Saved " .. tlgext .. " file overrides a "
+            .. lveext .. " file of the same name"
+        )
+      else
+        print(
+          "Test input \"" .. testfiledir .. "/" .. name .. lvtext
+            .. "\" not found"
+        )
+      end
+    end
+  end
+end
+
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-clean.lua b/Master/texmf-dist/tex/latex/l3build/l3build-clean.lua
new file mode 100644
index 00000000000..3fd8396c9ce
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-clean.lua
@@ -0,0 +1,56 @@
+--[[
+
+File l3build-clean.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+-- Remove all generated files
+function clean()
+  -- To make sure that distribdir never contains any stray subdirs,
+  -- it is entirely removed then recreated rather than simply deleting
+  -- all of the files
+  local errorlevel =
+    rmdir(distribdir)    +
+    mkdir(distribdir)    +
+    cleandir(localdir)   +
+    cleandir(testdir)    +
+    cleandir(typesetdir) +
+    cleandir(unpackdir)
+  for _,i in ipairs(cleanfiles) do
+    for _,dir in pairs(remove_duplicates({maindir, sourcefiledir, docfiledir})) do
+      errorlevel = rm(dir, i) + errorlevel
+    end
+  end
+  return errorlevel
+end
+
+function bundleclean()
+  local errorlevel = call(modules, "clean")
+  for _,i in ipairs(cleanfiles) do
+    errorlevel = rm(maindir, i) + errorlevel
+  end
+  return (
+    errorlevel     +
+    rmdir(ctandir) +
+    rmdir(tdsdir)
+  )
+end
+
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-ctan.lua b/Master/texmf-dist/tex/latex/l3build/l3build-ctan.lua
new file mode 100644
index 00000000000..47688349d8e
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-ctan.lua
@@ -0,0 +1,238 @@
+--[[
+
+File l3build-ctan.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+local gsub             = string.gsub
+local insert           = table.insert
+
+-- Copy files to the main CTAN release directory
+function copyctan()
+  local ctantarget = ctanpkg
+  if docfiledir ~= currentdir then
+    ctantarget = ctanpkg .. "/" .. gsub(docfiledir, "^%.*/", "")
+  end
+  mkdir(ctandir .. "/" .. ctantarget)
+  for _,filetype in pairs(
+      {
+        bibfiles,
+        demofiles,
+        docfiles,
+        pdffiles,
+        typesetlist
+      }
+    ) do
+    for _,file in pairs(filetype) do
+      cp(file, docfiledir, ctandir .. "/" .. ctantarget)
+    end
+  end
+  ctantarget = ctanpkg
+  if sourcefiledir ~= currentdir then
+    ctantarget = ctanpkg .. "/" .. gsub(sourcefiledir, "^%.*/", "")
+  end
+  mkdir(ctandir .. "/" .. ctantarget)
+  for _,file in pairs(sourcefiles) do
+    if sourcedir ~= currentdir then
+    end
+    cp(file, sourcefiledir, ctandir .. "/" .. ctantarget)
+  end
+  for _,file in pairs(textfiles) do
+    cp(file, currentdir, ctandir .. "/" .. ctanpkg)
+  end
+end
+
+-- Copy files to the correct places in the TDS tree
+function copytds()
+  local function install(source, dest, files, tool)
+    local moduledir = moduledir
+    -- For material associated with secondary tools (BibTeX, MakeIndex)
+    -- the structure needed is slightly different from those items going
+    -- into the tex/doc/source trees
+    if tool then
+      -- "base" is reserved for the tools themselves: make the assumption
+      -- in this case that the tdsroot name is the right place for stuff to
+      -- go (really just for the team)
+      if module == "base" then
+        moduledir = tdsroot
+      else
+        moduledir = module
+      end
+    end
+    -- Convert the file table(s) to a list of individual files
+    local filenames = { }
+    for _,i in ipairs(files) do
+      for _,j in ipairs(i) do
+        for file,_ in pairs(tree(source, j)) do
+          insert(filenames, file)
+        end
+      end
+    end
+    -- The target is only created if there are actual files to install
+    if next(filenames) ~= nil then
+      local installdir = tdsdir .. "/" .. dest .. "/" .. moduledir
+      mkdir(installdir)
+      for _,i in ipairs(filenames) do
+        cp(i, source, installdir)
+      end
+    end
+  end
+  install(
+    docfiledir,
+    "doc",
+    {bibfiles, demofiles, docfiles, pdffiles, textfiles, typesetlist}
+  )
+  install(unpackdir, "makeindex", {makeindexfiles}, true)
+  install(unpackdir, "bibtex/bst", {bstfiles}, true)
+  install(sourcefiledir, "source", {sourcelist})
+  install(unpackdir, "tex", {installfiles})
+end
+
+-- Standard versions of the main targets for building modules
+
+function ctan()
+  -- Always run tests for all engines
+  options["engine"] = nil
+  local function dirzip(dir, name)
+    local zipname = name .. ".zip"
+    local function tab_to_str(table)
+      local string = ""
+      for _,i in ipairs(table) do
+        string = string .. " " .. "\"" .. i .. "\""
+      end
+      return string
+    end
+    -- Convert the tables of files to quoted strings
+    local binfiles = tab_to_str(binaryfiles)
+    local exclude = tab_to_str(excludefiles)
+    -- First, zip up all of the text files
+    run(
+      dir,
+      zipexe .. " " .. zipopts .. " -ll ".. zipname .. " " .. "."
+        .. (
+          (binfiles or exclude) and (" -x" .. binfiles .. " " .. exclude)
+          or ""
+        )
+    )
+    -- Then add the binary ones
+    run(
+      dir,
+      zipexe .. " " .. zipopts .. " -g ".. zipname .. " " .. ". -i" ..
+        binfiles .. (exclude and (" -x" .. exclude) or "")
+    )
+  end
+  local errorlevel
+  local standalone = false
+  if bundle == "" then
+    standalone = true
+  end
+  if standalone then
+    errorlevel = check()
+    bundle = module
+  else
+    errorlevel = call(modules, "bundlecheck")
+  end
+  if errorlevel == 0 then
+    rmdir(ctandir)
+    mkdir(ctandir .. "/" .. ctanpkg)
+    rmdir(tdsdir)
+    mkdir(tdsdir)
+    if standalone then
+      errorlevel = bundlectan()
+    else
+      errorlevel = call(modules, "bundlectan")
+    end
+  else
+    print("\n====================")
+    print("Tests failed, zip stage skipped!")
+    print("====================\n")
+    return errorlevel
+  end
+  if errorlevel == 0 then
+    for _,i in ipairs(textfiles) do
+      for _,j in pairs({unpackdir, currentdir}) do
+        cp(i, j, ctandir .. "/" .. ctanpkg)
+        cp(i, j, tdsdir .. "/doc/" .. tdsroot .. "/" .. bundle)
+      end
+    end
+    dirzip(tdsdir, ctanpkg .. ".tds")
+    if packtdszip then
+      cp(ctanpkg .. ".tds.zip", tdsdir, ctandir)
+    end
+    dirzip(ctandir, ctanpkg)
+    cp(ctanpkg .. ".zip", ctandir, currentdir)
+  else
+    print("\n====================")
+    print("Typesetting failed, zip stage skipped!")
+    print("====================\n")
+  end
+  return errorlevel
+end
+
+function bundlectan()
+  -- Generate a list of individual file names excluding those in the second
+  -- argument: the latter is a table
+  local function excludelist(include, exclude, dir)
+    local include = include or { }
+    local exclude = exclude or { }
+    local dir = dir or currentdir
+    local includelist = { }
+    local excludelist = { }
+    for _,i in ipairs(exclude) do
+      for _,j in ipairs(i) do
+        for file,_ in pairs(tree(dir, j)) do
+          excludelist[file] = true
+        end
+      end
+    end
+    for _,i in ipairs(include) do
+      for file,_ in pairs(tree(dir, i)) do
+        if not excludelist[file] then
+          insert(includelist, file)
+        end
+      end
+    end
+    return includelist
+  end
+  unpack()
+  local errorlevel = doc()
+  if errorlevel == 0 then
+    -- Work out what PDF files are available
+    pdffiles = { }
+    for _,i in ipairs(typesetfiles) do
+      insert(pdffiles, (gsub(i, "%.%w+$", ".pdf")))
+    end
+    -- For the purposes here, any typesetting demo files need to be
+    -- part of the main typesetting list
+    local typesetfiles = typesetfiles
+    for _,v in pairs(typesetdemofiles) do
+      insert(typesetfiles, v)
+    end
+    typesetlist = excludelist(typesetfiles, {sourcefiles}, docfiledir)
+    sourcelist = excludelist(
+      sourcefiles, {bstfiles, installfiles, makeindexfiles}, sourcefiledir
+    )
+    copyctan()
+    copytds()
+  end
+  return errorlevel
+end
+
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-file-functions.lua b/Master/texmf-dist/tex/latex/l3build/l3build-file-functions.lua
new file mode 100644
index 00000000000..d85a3d203d2
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-file-functions.lua
@@ -0,0 +1,406 @@
+--[[
+
+File l3build-file-functions.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+
+local execute          = os.execute
+local getenv           = os.getenv
+local os_time          = os.time
+local os_type          = os.type
+
+local match            = string.match
+local sub              = string.sub
+local gsub             = string.gsub
+
+
+
+-- Convert a file glob into a pattern for use by e.g. string.gub
+-- Based on https://github.com/davidm/lua-glob-pattern
+-- Simplified substantially: "[...]" syntax not supported as is not
+-- required by the file patterns used by the team. Also note style
+-- changes to match coding approach in rest of this file.
+--
+-- License for original globtopattern
+--[[
+
+   (c) 2008-2011 David Manura.  Licensed under the same terms as Lua (MIT).
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+  (end license)
+
+--]]
+local function glob_to_pattern(glob)
+
+  local pattern = "^" -- pattern being built
+  local i = 0 -- index in glob
+  local char -- char at index i in glob
+
+  -- escape pattern char
+  local function escape(char)
+    return match(char, "^%w$") and char or "%" .. char
+  end
+
+  -- Convert tokens.
+  while true do
+    i = i + 1
+    char = sub(glob, i, i)
+    if char == "" then
+      pattern = pattern .. "$"
+      break
+    elseif char == "?" then
+      pattern = pattern .. "."
+    elseif char == "*" then
+      pattern = pattern .. ".*"
+    elseif char == "[" then
+      -- Ignored
+      print("[...] syntax not supported in globs!")
+    elseif char == "\\" then
+      i = i + 1
+      char = sub(glob, i, i)
+      if char == "" then
+        pattern = pattern .. "\\$"
+        break
+      end
+      pattern = pattern .. escape(char)
+    else
+      pattern = pattern .. escape(char)
+    end
+  end
+  return pattern
+end
+
+-- Detect the operating system in use
+-- Support items are defined here for cases where a single string can cover
+-- both Windows and Unix cases: more complex situations are handled inside
+-- the support functions
+os_concat  = ";"
+os_null    = "/dev/null"
+os_pathsep = ":"
+os_setenv  = "export"
+os_yes     = "printf 'y\\n%.0s' {1..200}"
+
+os_ascii   = "echo \"\""
+os_cmpexe  = getenv("cmpexe") or "cmp"
+os_cmpext  = getenv("cmpext") or ".cmp"
+os_diffext = getenv("diffext") or ".diff"
+os_diffexe = getenv("diffexe") or "diff -c --strip-trailing-cr"
+os_grepexe = "grep"
+os_newline = "\n"
+
+if os_type == "windows" then
+  os_ascii   = "@echo."
+  os_cmpexe  = getenv("cmpexe") or "fc /b"
+  os_cmpext  = getenv("cmpext") or ".cmp"
+  os_concat  = "&"
+  os_diffext = getenv("diffext") or ".fc"
+  os_diffexe = getenv("diffexe") or "fc /n"
+  os_grepexe = "findstr /r"
+  os_newline = "\n"
+  if tonumber(status.luatex_version) < 100 or
+     (tonumber(status.luatex_version) == 100
+       and tonumber(status.luatex_revision) < 4) then
+    os_newline = "\r\n"
+  end
+  os_null    = "nul"
+  os_pathsep = ";"
+  os_setenv  = "set"
+  os_yes     = "for /l %I in (1,1,200) do @echo y"
+end
+
+-- Return an absolute path from a relative one
+function abspath(path)
+  local oldpwd = lfs.currentdir()
+  lfs.chdir(path)
+  local result = lfs.currentdir()
+  lfs.chdir(oldpwd)
+  return gsub(result, "\\", "/")
+end
+
+-- For cleaning out a directory, which also ensures that it exists
+function cleandir(dir)
+  local errorlevel = mkdir(dir)
+  if errorlevel ~= 0 then
+    return errorlevel
+  end
+  return rm(dir, "*")
+end
+
+-- Copy files 'quietly'
+function cp(glob, source, dest)
+  local errorlevel
+  for i,_ in pairs(tree(source, glob)) do
+    local source = source .. "/" .. i
+    if os_type == "windows" then
+      if lfs.attributes(source)["mode"] == "directory" then
+        errorlevel = execute(
+          'xcopy /y /e /i "' .. unix_to_win(source) .. '" "'
+             .. unix_to_win(dest .. '/' .. i) .. '" > nul'
+        )
+      else
+        errorlevel = execute(
+          'xcopy /y "' .. unix_to_win(source) .. '" "'
+             .. unix_to_win(dest .. '/') .. '" > nul'
+        )
+      end
+    else
+      errorlevel = execute("cp -RLf '" .. source .. "' '" .. dest .. "'")
+    end
+    if errorlevel ~=0 then
+      return errorlevel
+    end
+  end
+  return 0
+end
+
+-- OS-dependent test for a directory
+function direxists(dir)
+  local errorlevel
+  if os_type == "windows" then
+    errorlevel =
+      execute("if not exist \"" .. unix_to_win(dir) .. "\" exit 1")
+  else
+    errorlevel = execute("[ -d " .. dir .. " ]")
+  end
+  if errorlevel ~= 0 then
+    return false
+  end
+  return true
+end
+
+function fileexists(file)
+  local f = io.open(file, "r")
+  if f ~= nil then
+    f:close()
+    return true
+  else
+    return false
+  end
+end
+
+-- Generate a table containing all file names of the given glob or all files
+-- if absent
+function filelist(path, glob)
+  local files = { }
+  local pattern
+  if glob then
+    pattern = glob_to_pattern(glob)
+  end
+  if direxists(path) then
+    for entry in lfs.dir(path) do
+      if pattern then
+        if match(entry, pattern) then
+          table.insert(files, entry)
+        end
+      else
+        if entry ~= "." and entry ~= ".." then
+          table.insert(files, entry)
+        end
+      end
+    end
+  end
+  return files
+end
+
+-- Does what filelist does, but can also glob subdirectories. In the returned
+-- table, the keys are paths relative to the given starting path, the values
+-- are their counterparts relative to the current working directory.
+function tree(path, glob)
+  local function cropdots(path)
+    return gsub(gsub(path, "^%./", ""), "/%./", "/")
+  end
+  local function always_true()
+    return true
+  end
+  local function is_dir(file)
+    return lfs.attributes(file)["mode"] == "directory"
+  end
+  local dirs = {["."] = cropdots(path)}
+  for pattern, criterion in string.gmatch(cropdots(glob), "([^/]+)(/?)") do
+    local criterion = criterion == "/" and is_dir or always_true
+    function fill(path, dir, table)
+      for _, file in ipairs(filelist(dir, pattern)) do
+        local fullpath = path .. "/" .. file
+        if file ~= "." and file ~= ".." and
+          fullpath ~= builddir and
+          (sub(pattern, 1, 1) == "."
+            or sub(file, 1, 1) ~= ".")
+        then
+          local fulldir = dir .. "/" .. file
+          if criterion(fulldir) then
+            table[fullpath] = fulldir
+          end
+        end
+      end
+    end
+    local newdirs = {}
+    if pattern == "**" then
+      while true do
+        path, dir = next(dirs)
+        if not path then
+          break
+        end
+        dirs[path] = nil
+        newdirs[path] = dir
+        fill(path, dir, dirs)
+      end
+    else
+      for path, dir in pairs(dirs) do
+        fill(path, dir, newdirs)
+      end
+    end
+    dirs = newdirs
+  end
+  return dirs
+end
+
+function remove_duplicates(a)
+  -- Return array with duplicate entries removed from input array `a`.
+
+  local uniq = {}
+  local hash = {}
+
+  for _,v in ipairs(a) do
+    if (not hash[v]) then
+      hash[v] = true
+      uniq[#uniq+1] = v
+    end
+  end
+
+  return uniq
+end
+
+function mkdir(dir)
+  if os_type == "windows" then
+    -- Windows (with the extensions) will automatically make directory trees
+    -- but issues a warning if the dir already exists: avoid by including a test
+    local dir = unix_to_win(dir)
+    return execute(
+      "if not exist "  .. dir .. "\\nul " .. "mkdir " .. dir
+    )
+  else
+    return execute("mkdir -p " .. dir)
+  end
+end
+
+-- Rename
+function ren(dir, source, dest)
+  local dir = dir .. "/"
+  if os_type == "windows" then
+    local source = gsub(source, "^%.+/", "")
+    local dest = gsub(dest, "^%.+/", "")
+    return execute("ren " .. unix_to_win(dir) .. source .. " " .. dest)
+  else
+    return execute("mv " .. dir .. source .. " " .. dir .. dest)
+  end
+end
+
+-- Remove file(s) based on a glob
+function rm(source, glob)
+  for _,i in ipairs(filelist(source, glob)) do
+    rmfile(source,i)
+  end
+  -- os.remove doesn't give a sensible errorlevel
+  return 0
+end
+
+-- Remove file
+function rmfile(source, file)
+  os.remove(source .. "/" .. file)
+  -- os.remove doesn't give a sensible errorlevel
+  return 0
+end
+
+-- Remove a directory tree
+function rmdir(dir)
+  -- First, make sure it exists to avoid any errors
+  mkdir(dir)
+  if os_type == "windows" then
+    return execute("rmdir /s /q " .. unix_to_win(dir))
+  else
+    return execute("rm -r " .. dir)
+  end
+end
+
+-- Run a command in a given directory
+function run(dir, cmd)
+  return execute("cd " .. dir .. os_concat .. cmd)
+end
+
+-- Deal with the fact that Windows and Unix use different path separators
+function unix_to_win(path)
+  return gsub(path, "/", "\\")
+end
+
+
+-- Split a path into file and directory component
+function splitpath(file)
+  local path, name = match(file, "^(.*)/([^/]*)$")
+  if path then
+    return path, name
+  else
+    return ".", file
+  end
+end
+
+-- Arguably clearer names
+function basename(file)
+  return(select(2, splitpath(file)))
+end
+
+function dirname(file)
+  return(select(1, splitpath(file)))
+end
+
+-- Strip the extension from a file name (if present)
+function jobname(file)
+  local name = match(basename(file), "^(.*)%.")
+  return name or file
+end
+
+-- Look for files, directory by directory, and return the first existing
+function locate(dirs, names)
+  for _,i in ipairs(dirs) do
+    for _,j in ipairs(names) do
+      local path = i .. "/" .. j
+      if fileexists(path) then
+        return path
+      end
+    end
+  end
+end
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-help.lua b/Master/texmf-dist/tex/latex/l3build/l3build-help.lua
new file mode 100644
index 00000000000..656f82999ab
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-help.lua
@@ -0,0 +1,78 @@
+--[[
+
+File l3build-help.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+function version()
+  print(
+    "\n" ..
+    "l3build: A testing and building system for LaTeX\n\n" ..
+    "Release " .. release_date
+  )
+end
+
+function help()
+  print("usage: " .. arg[0] .. " <command> [<options>] [<names>]")
+  print("")
+  print("The most commonly used l3build commands are:")
+  if testfiledir ~= "" then
+    print("   check      Run all automated tests")
+  end
+  print("   clean      Clean out directory tree")
+  if module == "" or bundle == "" then
+    print("   ctan       Create CTAN-ready archive")
+  end
+  print("   doc        Typesets all documentation files")
+  print("   install    Installs files into the local texmf tree")
+  if module ~= "" and testfiledir ~= "" then
+    print("   save       Saves test validation log")
+  end
+  print("   setversion Update version information in sources")
+  print("   unpack     Unpacks the source files into the build tree")
+  print("")
+  print("Valid options are:")
+  local longest = 0
+  for k,v in pairs(option_list) do
+    if k:len() > longest then
+      longest = k:len()
+    end
+  end
+  -- Sort the options
+  local t = { }
+  for k,_ in pairs(option_list) do
+    table.insert(t, k)
+  end
+  table.sort(t)
+  for _,k in ipairs(t) do
+    local opt = option_list[k]
+    local filler = string.rep(" ", longest - k:len() + 1)
+    if opt["desc"] then -- Skip --help as it has no desc
+      if opt["short"] then
+        print("   --" .. k .. "|-" .. opt["short"] .. filler .. opt["desc"])
+      else
+        print("   --" .. k .. "   " .. filler .. opt["desc"])
+      end
+    end
+  end
+  print("")
+  print("See l3build.pdf for further details.")
+end
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-install.lua b/Master/texmf-dist/tex/latex/l3build/l3build-install.lua
new file mode 100644
index 00000000000..dd1526a0473
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-install.lua
@@ -0,0 +1,57 @@
+--[[
+
+File l3build-install.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+
+-- Locally install files: only deals with those extracted, not docs etc.
+function install()
+  local errorlevel = unpack()
+  if errorlevel ~= 0 then
+    return errorlevel
+  end
+  kpse.set_program_name("latex")
+  local texmfhome = options["texmfhome"] or kpse.var_value("TEXMFHOME")
+  local installdir = texmfhome .. "/tex/" .. moduledir
+  if options["dry-run"] then
+    print("\n" .. "Installation root: " .. installdir
+      .. "\n" .. "Intallation files:"
+    )
+    for _,filetype in ipairs(installfiles) do
+      for _,file in pairs(filelist(unpackdir,filetype)) do
+        print("- " .. file)
+      end
+    end
+  else
+    errorlevel = cleandir(installdir)
+    if errorlevel ~= 0 then
+      return errorlevel
+    end
+    for _,filetype in ipairs(installfiles) do
+      errorlevel = cp(filetype, unpackdir, installdir)
+      if errorlevel ~= 0 then
+        return errorlevel
+      end
+    end
+  end
+  return 0
+end
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-manifest-setup.lua b/Master/texmf-dist/tex/latex/l3build/l3build-manifest-setup.lua
new file mode 100644
index 00000000000..fb46eb1d369
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-manifest-setup.lua
@@ -0,0 +1,364 @@
+--[[
+
+File l3build-manifest-setup.lua Copyright (C) 2017-2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+
+--[[
+      L3BUILD MANIFEST SETUP
+      ======================
+      This file contains all of the code that is easily replaceable by the user.
+      Either create a copy of this file, rename, and include alongside your `build.lua`
+      script and load it with `dofile()`, or simply copy/paste the definitions below
+      into your `build.lua` script directly.
+--]]
+
+
+--[[
+      Setup of manifest "groups"
+      --------------------------
+
+      The grouping of manifest files is broken into three subheadings:
+
+      * The development repository
+      * The TDS structure from `ctan`
+      * The CTAN structure from `ctan`
+
+      The latter two will only be produced if the `manifest` target is run *after*
+      the `ctan` target. Contrarily, if you run `clean` before `manifest` then
+      only the first grouping will be printed.
+
+      If you want to omit the files in the development repository, essentially
+      producing a minimalist manifest with only the files included for distribution,
+      make a copy of the `manifest_setup` function and delete the groups under
+      the ‘Repository manifest’ subheading below.
+--]]
+
+
+manifest_setup = manifest_setup or function()
+  local groups = {
+    {
+       subheading = "Repository manifest",
+       description = [[
+The following groups list the files included in the development repository of the package.
+Files listed with a ‘†’ marker are included in the TDS but not CTAN files, and files listed
+with ‘‡’ are included in both.
+]],
+    },
+    {
+       name    = "Source files",
+       description = [[
+These are source files for a number of purposes, including the `unpack` process which
+generates the installation files of the package. Additional files included here will also
+be installed for processing such as testing.
+]],
+       files   = {sourcefiles},
+       dir     = sourcefiledir or maindir, -- TODO: remove "or maindir" after rebasing onto master
+    },
+    {
+       name    = "Typeset documentation source files",
+       description = [[
+These files are typeset using LaTeX to produce the PDF documentation for the package.
+]],
+       files   = {typesetfiles,typesetsourcefiles,typesetdemofiles},
+    },
+    {
+       name    = "Documentation files",
+       description = [[
+These files form part of the documentation but are not typeset. Generally they will be
+additional input files for the typeset documentation files listed above.
+]],
+       files   = {docfiles},
+       dir     = docfiledir or maindir, -- TODO: remove "or maindir" after rebasing onto master
+    },
+    {
+       name    = "Text files",
+       description = [[
+Plain text files included as documentation or metadata.
+]],
+       files   = {textfiles},
+       skipfiledescription = true,
+    },
+    {
+       name    = "Demo files",
+       description = [[
+Files included to demonstrate package functionality. These files are *not*
+typeset or compiled in any way.
+]],
+       files   = {demofiles},
+    },
+    {
+       name    = "Bibliography and index files",
+       description = [[
+Supplementary files used for compiling package documentation.
+]],
+       files   = {bibfiles,bstfiles,makeindexfiles},
+    },
+    {
+       name    = "Derived files",
+       description = [[
+The files created by ‘unpacking’ the package sources. This typically includes
+`.sty` and `.cls` files created from DocStrip `.dtx` files.
+]],
+       files   = {installfiles},
+       exclude = {excludefiles,sourcefiles},
+       dir     = unpackdir,
+       skipfiledescription = true,
+    },
+    {
+       name    = "Typeset documents",
+       description = [[
+The output files (PDF, essentially) from typesetting the various source, demo,
+etc., package files.
+]],
+       files   = {typesetfiles,typesetsourcefiles,typesetdemofiles},
+       rename  = {"%.%w+$", ".pdf"},
+       skipfiledescription = true,
+    },
+    {
+       name    = "Support files",
+       description = [[
+These files are used for unpacking, typesetting, or checking purposes.
+]],
+       files   = {unpacksuppfiles,typesetsuppfiles,checksuppfiles},
+       dir     = supportdir,
+    },
+    {
+       name    = "Checking-specific support files",
+       description = [[
+Support files for checking the test suite.
+]],
+       files   = {"*.*"},
+       exclude = {{".",".."},excludefiles},
+       dir     = testsuppdir,
+    },
+    {
+       name    = "Test files",
+       description = [[
+These files form the test suite for the package. `.lvt` or `.lte` files are the individual
+unit tests, and `.tlg` are the stored output for ensuring changes to the package produce
+the same output. These output files are sometimes shared and sometime specific for
+different engines (pdfTeX, XeTeX, LuaTeX, etc.).
+]],
+       files   = {"*"..lvtext,"*"..lveext,"*"..tlgext},
+       dir     = testfiledir,
+       skipfiledescription = true,
+    },
+    {
+       subheading = "TDS manifest",
+       description = [[
+The following groups list the files included in the TeX Directory Structure used to install
+the package into a TeX distribution.
+]],
+    },
+    {
+       name    = "Source files (TDS)",
+       description = "All files included in the `"..module.."/source` directory.\n",
+       dir     = tdsdir.."/source/"..moduledir,
+       files   = {"*.*"},
+       exclude = {".",".."},
+       flag    = false,
+       skipfiledescription = true,
+    },
+    {
+       name    = "TeX files (TDS)",
+       description = "All files included in the `"..module.."/tex` directory.\n",
+       dir     = tdsdir.."/tex/"..moduledir,
+       files   = {"*.*"},
+       exclude = {".",".."},
+       flag    = false,
+       skipfiledescription = true,
+    },
+    {
+       name    = "Doc files (TDS)",
+       description = "All files included in the `"..module.."/doc` directory.\n",
+       dir     = tdsdir.."/doc/"..moduledir,
+       files   = {"*.*"},
+       exclude = {".",".."},
+       flag    = false,
+       skipfiledescription = true,
+    },
+    {
+       subheading = "CTAN manifest",
+       description = [[
+The following group lists the files included in the CTAN package.
+]],
+    },
+    {
+       name    = "CTAN files",
+       dir     = ctandir.."/"..module,
+       files   = {"*.*"},
+       exclude = {".",".."},
+       flag    = false,
+       skipfiledescription = true,
+    },
+  }
+  return groups
+end
+
+--[[
+      Sorting within groups
+      ---------------------
+--]]
+
+manifest_sort_within_match = manifest_sort_within_match or function(files)
+  local f = files
+  table.sort(f)
+  return f
+end
+
+manifest_sort_within_group = manifest_sort_within_group or function(files)
+  local f = files
+  --[[
+      -- no-op by default; make your own definition to customise. E.g.:
+      table.sort(f)
+  --]]
+  return f
+end
+
+--[[
+      Writing to file
+      ---------------
+--]]
+
+manifest_write_opening = manifest_write_opening or function(filehandle)
+
+  filehandle:write("# Manifest for " .. module .. "\n\n")
+  filehandle:write([[
+This file is a listing of all files considered to be part of this package.
+It is automatically generated with `texlua build.lua manifest`.
+]])
+
+end
+
+manifest_write_subheading = manifest_write_subheading or function(filehandle,heading,description)
+
+  filehandle:write("\n\n## " .. heading .. "\n\n")
+
+  if description then
+    filehandle:write(description)
+  end
+
+end
+
+manifest_write_group_heading = manifest_write_group_heading or function (filehandle,heading,description)
+
+  filehandle:write("\n### " .. heading .. "\n\n")
+
+  if description then
+    filehandle:write(description .. "\n")
+  end
+
+end
+
+manifest_write_group_file = manifest_write_group_file or function(filehandle,filename,param)
+  --[[
+        filehandle        : write file object
+        filename          : the count of the filename to be written
+
+        param.dir         : the directory of the file
+        param.count       : the name of the file to write
+        param.filemaxchar : the maximum number of chars of all filenames in this group
+        param.flag        : false OR string for indicating CTAN/TDS location
+        param.ctanfile    : (boolean) if file is in CTAN dir
+        param.tdsfile     : (boolean) if file is in TDS dir
+  --]]
+
+  -- no file description: plain bullet list item:
+
+  flagstr = param.flag or  ""
+  filehandle:write("* " .. filename .. " " .. flagstr .. "\n")
+
+  --[[
+    -- or if you prefer an enumerated list:
+    filehandle:write(param.count..". " .. filename .. "\n")
+  --]]
+
+
+end
+
+manifest_write_group_file_descr = manifest_write_group_file_descr or function(filehandle,filename,descr,param)
+  --[[
+        filehandle        : write file object
+        filename          : the name of the file to write
+        descr             : description of the file to write
+
+        param.dir         : the directory of the file
+        param.count       : the count of the filename to be written
+        param.filemaxchar : the maximum number of chars of all filenames in this group
+        param.descmaxchar : the maximum number of chars of all descriptions in this group
+        param.flag        : false OR string for indicating CTAN/TDS location
+        param.ctanfile    : (boolean) if file is in CTAN dir
+        param.tdsfile     : (boolean) if file is in TDS dir
+  --]]
+
+  -- filename+description: Github-flavoured Markdown table
+
+  filestr = string.format(" | %-"..param.filemaxchar.."s",filename)
+  flagstr = param.flag and string.format(" | %s",param.flag) or  ""
+  descstr = string.format(" | %-"..param.descmaxchar.."s",descr)
+
+  filehandle:write(filestr..flagstr..descstr.." |\n")
+
+end
+
+--[[
+      Extracting ‘descriptions’ from source files
+      -------------------------------------------
+--]]
+
+manifest_extract_filedesc = manifest_extract_filedesc or function(filehandle)
+
+  -- no-op by default; two examples below
+
+end
+
+--[[
+
+-- From the first match of a pattern in a file:
+manifest_extract_filedesc = function(filehandle)
+
+  local all_file = filehandle:read("*all")
+  local matchstr = "\\section{(.-)}"
+
+  filedesc = string.match(all_file,matchstr)
+
+  return filedesc
+end
+
+-- From the match of the 2nd line (say) of a file:
+manifest_extract_filedesc = function(filehandle)
+
+  local end_read_loop = 2
+  local matchstr      = "%%%S%s+(.*)"
+  local this_line     = ""
+
+  for ii = 1, end_read_loop do
+    this_line = filehandle:read("*line")
+  end
+
+  filedesc = string.match(this_line,matchstr)
+
+  return filedesc
+end
+
+]]--
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-manifest.lua b/Master/texmf-dist/tex/latex/l3build/l3build-manifest.lua
new file mode 100644
index 00000000000..3b899d55fd8
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-manifest.lua
@@ -0,0 +1,280 @@
+--[[
+
+File l3build-manifest.lua Copyright (C) 2017-2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+
+--[[
+      L3BUILD MANIFEST
+      ================
+      If desired this entire function can be replaced; if not, it uses a number of
+      auxiliary functions which are included in this file.
+
+      Additional setup can be performed by replacing the functions lists in the file
+      `l3build-manifest-setup.lua`.
+--]]
+
+manifest = manifest or function()
+
+  -- build list of ctan files
+  ctanfiles = {}
+  for _,f in ipairs(filelist(ctandir.."/"..ctanpkg,"*.*")) do
+    ctanfiles[f] = true
+  end
+  tdsfiles = {}
+  for _,subdir in ipairs({"/doc/","/source/","/tex/"}) do
+    for _,f in ipairs(filelist(tdsdir..subdir..moduledir,"*.*")) do
+      tdsfiles[f] = true
+    end
+  end
+
+  local manifest_entries = manifest_setup()
+
+  for ii,_ in ipairs(manifest_entries) do
+    manifest_entries[ii] = manifest_build_list(manifest_entries[ii])
+  end
+
+  manifest_write(manifest_entries)
+
+  printline = "Manifest written to " .. manifestfile
+  print((printline:gsub(".","*")))  print(printline)  print((printline:gsub(".","*")))
+
+end
+
+--[[
+      Internal Manifest functions: build_list
+      ---------------------------------------
+--]]
+
+manifest_build_list = function(entry)
+
+  if not(entry.subheading) then
+
+    entry = manifest_build_init(entry)
+
+    -- build list of excluded files
+    for _,glob_list in ipairs(entry.exclude) do
+      for _,this_glob in ipairs(glob_list) do
+        for _,this_file in ipairs(filelist(maindir,this_glob)) do
+          entry.excludes[this_file] = true
+        end
+      end
+    end
+
+    -- build list of matched files
+    for _,glob_list in ipairs(entry.files) do
+      for _,this_glob in ipairs(glob_list) do
+
+        local these_files = filelist(entry.dir,this_glob)
+        these_files = manifest_sort_within_match(these_files)
+
+        for _,this_file in ipairs(these_files) do
+          entry = manifest_build_file(entry,this_file)
+        end
+
+        entry.files_ordered = manifest_sort_within_group(entry.files_ordered)
+
+      end
+    end
+
+	end
+
+  return entry
+
+end
+
+
+manifest_build_init = function(entry)
+
+  -- currently these aren't customisable; I guess they could be?
+  local manifest_group_defaults = {
+    skipfiledescription  = false          ,
+    rename               = false          ,
+    dir                  = maindir        ,
+    exclude              = {excludefiles} ,
+    flag                 = true           ,
+  }
+
+  -- internal data added to each group in the table that needs to be initialised
+  local manifest_group_init = {
+    N             = 0  , -- # matched files
+    ND            = 0  , -- # descriptions
+    matches       = {} ,
+    excludes      = {} ,
+    files_ordered = {} ,
+    descr         = {} ,
+    Nchar_file    = 4  , -- TODO: generalise
+    Nchar_descr   = 11 , -- TODO: generalise
+  }
+
+   -- copy default options to each group if necessary
+  for kk,ll in pairs(manifest_group_defaults) do
+    if entry[kk] == nil then
+      entry[kk] = ll
+    end
+    -- can't use "entry[kk] = entry[kk] or ll" because false/nil are indistinguishable!
+  end
+
+  -- initialisation for internal data
+  for kk,ll in pairs(manifest_group_init) do
+    entry[kk] = ll
+  end
+
+  -- allow nested tables by requiring two levels of nesting
+  if type(entry.files[1])=="string" then
+    entry.files = {entry.files}
+  end
+  if type(entry.exclude[1])=="string" then
+    entry.exclude = {entry.exclude}
+  end
+
+  return entry
+
+end
+
+
+manifest_build_file = function(entry,this_file)
+
+  if entry.rename then
+    this_file = this_file:gsub(entry.rename[1],entry.rename[2])
+  end
+
+  if not entry.excludes[this_file] then
+
+    entry.N = entry.N+1
+    if not(entry.matches[this_file]) then
+
+      entry.matches[this_file] = true -- store the file name
+      entry.files_ordered[entry.N] = this_file -- store the file order
+      entry.Nchar_file = math.max(entry.Nchar_file,this_file:len())
+
+    end
+
+    if not(entry.skipfiledescription) then
+
+      local ff = assert(io.open(entry.dir .. "/" .. this_file, "r"))
+      this_descr  = manifest_extract_filedesc(ff,this_file)
+      ff:close()
+
+      if this_descr and this_descr ~= "" then
+        entry.descr[this_file] = this_descr
+        entry.ND = entry.ND+1
+        entry.Nchar_descr = math.max(entry.Nchar_descr,this_descr:len())
+      end
+
+    end
+  end
+
+  return entry
+
+end
+
+--[[
+      Internal Manifest functions: write
+      ----------------------------------
+--]]
+
+manifest_write = function(manifest_entries)
+
+  local f = assert(io.open(manifestfile, "w"))
+  manifest_write_opening(f)
+
+  for ii,vv in ipairs(manifest_entries) do
+    if manifest_entries[ii].subheading then
+      manifest_write_subheading(f,manifest_entries[ii].subheading,manifest_entries[ii].description)
+    elseif manifest_entries[ii].N > 0 then
+      manifest_write_group(f,manifest_entries[ii])
+    end
+  end
+
+  f:close()
+
+end
+
+
+manifest_write_group = function(f,entry)
+
+  manifest_write_group_heading(f,entry.name,entry.description)
+
+  if entry.ND > 0 then
+
+    for ii,file in ipairs(entry.files_ordered) do
+      local descr = entry.descr[file] or ""
+      local param = {
+        dir         = entry.dir         ,
+        count       = ii                ,
+        filemaxchar = entry.Nchar_file  ,
+        descmaxchar = entry.Nchar_descr ,
+        ctanfile    = ctanfiles[file]   ,
+        tdsfile     = tdsfiles[file]    ,
+        flag        = false             ,
+      }
+
+      if entry.flag then
+        param.flag = "    "
+	  		if tdsfiles[file] and not(ctanfiles[file]) then
+	  			param.flag = "†   "
+	  		elseif ctanfiles[file] then
+	  			param.flag = "‡   "
+	  		end
+			end
+
+			if ii == 1 then
+        -- header of table
+        -- TODO: generalise
+				local p = {}
+				for k,v in pairs(param) do p[k] = v end
+				p.count = -1
+				p.flag = p.flag and "Flag"
+				manifest_write_group_file_descr(f,"File","Description",p)
+				p.flag = p.flag and "--- "
+				manifest_write_group_file_descr(f,"---","---",p)
+      end
+
+      manifest_write_group_file_descr(f,file,descr,param)
+    end
+
+  else
+
+    for ii,file in ipairs(entry.files_ordered) do
+      local param = {
+        dir         = entry.dir         ,
+      	count       = ii                ,
+      	filemaxchar = entry.Nchar_file  ,
+        ctanfile    = ctanfiles[file]   ,
+        tdsfile     = tdsfiles[file]    ,
+      }
+      if entry.flag then
+        param.flag = ""
+	  		if tdsfiles[file] and not(ctanfiles[file]) then
+	  			param.flag = "†"
+	  		elseif ctanfiles[file] then
+	  			param.flag = "‡"
+	  		end
+			end
+      manifest_write_group_file(f,file,param)
+    end
+
+  end
+
+end
+
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-setversion.lua b/Master/texmf-dist/tex/latex/l3build/l3build-setversion.lua
new file mode 100644
index 00000000000..178bb29489a
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-setversion.lua
@@ -0,0 +1,140 @@
+--[[
+
+File l3build-setversion.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+
+--[[
+      L3BUILD SETVERSION
+      ==================
+--]]
+
+local gsub             = string.gsub
+local match            = string.match
+
+-- Provide some standard search-and-replace functions
+if versionform ~= "" and not setversion_update_line then
+  if versionform == "ProvidesPackage" then
+    function setversion_update_line(line, date, version)
+      -- No real regex so do it one type at a time
+      for _,i in pairs({"Class", "File", "Package"}) do
+        if match(
+          line,
+          "^\\Provides" .. i .. "{[a-zA-Z0-9%-%.]+}%[[^%]]*%]$"
+        ) then
+          line = gsub(line, "%[%d%d%d%d/%d%d/%d%d", "["
+            .. gsub(date, "%-", "/"))
+          line = gsub(
+            line, "(%[%d%d%d%d/%d%d/%d%d) [^ ]*", "%1 " .. version
+          )
+          break
+        end
+      end
+      return line
+    end
+  elseif versionform == "ProvidesExplPackage" then
+    function setversion_update_line(line, date, version)
+      -- No real regex so do it one type at a time
+      for _,i in pairs({"Class", "File", "Package"}) do
+        if match(
+          line,
+          "^\\ProvidesExpl" .. i .. " *{[a-zA-Z0-9%-%.]+}"
+        ) then
+          line = gsub(
+            line,
+            "{%d%d%d%d/%d%d/%d%d}( *){[^}]*}",
+            "{" .. gsub(date, "%-", "/") .. "}%1{" .. version .. "}"
+          )
+          break
+        end
+      end
+      return line
+    end
+  elseif versionform == "filename" then
+    function setversion_update_line(line, date, version)
+      if match(line, "^\\def\\filedate{%d%d%d%d/%d%d/%d%d}$") then
+        line = "\\def\\filedate{" .. gsub(date, "%-", "/") .. "}"
+      end
+      if match(line, "^\\def\\fileversion{[^}]+}$") then
+        line = "\\def\\fileversion{" .. version .. "}"
+      end
+      return line
+    end
+  elseif versionform == "ExplFileDate" then
+    function setversion_update_line(line, date, version)
+      if match(line, "^\\def\\ExplFileDate{%d%d%d%d/%d%d/%d%d}$") then
+        line = "\\def\\ExplFileDate{" .. gsub(date, "%-", "/") .. "}"
+      end
+      if match(line, "^\\def\\ExplFileVersion{[^}]+}$") then
+        line = "\\def\\ExplFileVersion{" .. version .. "}"
+      end
+      return line
+    end
+  end
+end
+
+-- Used to actually carry out search-and-replace
+setversion_update_line = setversion_update_line or function(line, date, version)
+  return line
+end
+
+function setversion()
+  local function rewrite(dir, file, date, version)
+    local changed = false
+    local result = ""
+    for line in io.lines(dir .. "/" .. file) do
+      local newline = setversion_update_line(line, date, version)
+      if newline ~= line then
+        line = newline
+        changed = true
+      end
+      result = result .. line .. os_newline
+    end
+    if changed then
+      -- Avoid adding/removing end-of-file newline
+      local f = io.open(dir .. "/" .. file, "rb")
+      local content = f:read("*all")
+      f:close()
+      if not match(content, os_newline .. "$") then
+        gsub(result, os_newline .. "$", "")
+      end
+      -- Write the new file
+      ren(dir, file, file .. bakext)
+      local f = io.open(dir .. "/" .. file, "w")
+      io.output(f)
+      io.write(result)
+      f:close()
+      rmfile(dir, file .. bakext)
+    end
+  end
+  local date = options["date"] or os.date("%Y-%m-%d")
+  local version = options["version"] or -1
+  for _,dir in pairs(remove_duplicates({currentdir, sourcefiledir, docfiledir})) do
+    for _,i in pairs(versionfiles) do
+      for file,_ in pairs(tree(dir, i)) do
+        rewrite(dir, file, date, version)
+      end
+    end
+  end
+  return 0
+end
+
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-stdmain.lua b/Master/texmf-dist/tex/latex/l3build/l3build-stdmain.lua
new file mode 100644
index 00000000000..d8cd8da6278
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-stdmain.lua
@@ -0,0 +1,123 @@
+--[[
+
+File l3build-stdmain.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+local exit             = os.exit
+
+-- List all modules
+function listmodules()
+  local modules = { }
+  local exclmodules = exclmodules or { }
+  for entry in lfs.dir(".") do
+    if entry ~= "." and entry ~= ".." then
+      local attr = lfs.attributes(entry)
+      assert(type(attr) == "table")
+      if attr.mode == "directory" then
+        if not exclmodules[entry] then
+          table.insert(modules, entry)
+        end
+      end
+    end
+  end
+  return modules
+end
+
+--
+-- The overall main function
+--
+
+function stdmain(target, files)
+  local errorlevel
+  -- If the module name is empty, the script is running in a bundle:
+  -- apart from ctan all of the targets are then just mappings
+  if module == "" then
+    -- Detect all of the modules
+    modules = modules or listmodules()
+    if target == "doc" then
+      errorlevel = call(modules, "doc")
+    elseif target == "check" then
+      errorlevel = call(modules, "bundlecheck")
+      if errorlevel ~=0 then
+        print("There were errors: checks halted!\n")
+      end
+    elseif target == "clean" then
+      errorlevel = bundleclean()
+    elseif target == "ctan" then
+      errorlevel = ctan()
+    elseif target == "install" then
+      errorlevel = call(modules, "install")
+    elseif target == "setversion" then
+      errorlevel = call(modules, "setversion")
+      -- Deal with any files in the bundle dir itself
+      if errorlevel == 0 then
+        errorlevel = setversion()
+      end
+    elseif target == "unpack" then
+      errorlevel = call(modules, "bundleunpack")
+    elseif target == "version" then
+      version()
+    else
+      help()
+    end
+  else
+    if target == "bundleunpack" then -- 'Hidden' as only needed 'higher up'
+      depinstall(unpackdeps)
+      errorlevel = bundleunpack()
+    elseif target == "bundlecheck" then
+      errorlevel = check()
+    elseif target == "bundlectan" then
+      errorlevel = bundlectan()
+    elseif target == "doc" then
+      errorlevel = doc(files)
+    elseif target == "check" then
+      errorlevel = check(files)
+    elseif target == "clean" then
+      errorlevel = clean()
+    elseif target == "ctan" then
+      errorlevel = ctan()
+    elseif target == "install" then
+      errorlevel = install()
+    elseif target == "manifest" then
+      errorlevel = manifest()
+    elseif target == "save" then
+      if next(files) then
+        errorlevel = save(files)
+      else
+        help()
+      end
+    elseif target == "setversion" then
+      errorlevel = setversion()
+    elseif target == "unpack" then
+      errorlevel = unpack()
+    elseif target == "version" then
+      version()
+    else
+      help()
+    end
+  end
+  if errorlevel ~= 0 then
+    exit(1)
+  else
+    exit(0)
+  end
+end
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-typesetting.lua b/Master/texmf-dist/tex/latex/l3build/l3build-typesetting.lua
new file mode 100644
index 00000000000..46feb0375d7
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-typesetting.lua
@@ -0,0 +1,247 @@
+--[[
+
+File l3build-typesetting.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+--
+-- Auxiliary functions for typesetting: need to be generally available
+--
+
+local gsub             = string.gsub
+local match            = string.match
+
+function dvitopdf(name, dir, engine, hide)
+  if match(engine, "^u?ptex$") then
+    run(
+      dir,
+      (forcecheckepoch and setepoch() or "") ..
+     "dvipdfmx  " .. name .. dviext
+       .. (hide and (" > " .. os_null) or "")
+    )
+  else
+    run(
+      dir,
+      (forcecheckepoch and setepoch() or "") ..
+     "dvips " .. name .. dviext
+       .. (hide and (" > " .. os_null) or "")
+       .. os_concat ..
+     "ps2pdf " .. name .. psext
+        .. (hide and (" > " .. os_null) or "")
+    )
+  end
+end
+
+-- An auxiliary used to set up the environmental variables
+function runtool(subdir, dir, envvar, command)
+  dir = dir or "."
+  return(
+    run(
+      typesetdir .. "/" .. subdir,
+      (forcedocepoch and setepoch() or "") ..
+      os_setenv .. " " .. envvar .. "=." .. os_pathsep
+        .. abspath(localdir) .. os_pathsep
+        .. abspath(dir .. "/" .. subdir)
+        .. (typesetsearch and os_pathsep or "")
+        .. os_concat ..
+      command
+    )
+  )
+end
+
+function biber(name, dir)
+  if fileexists(typesetdir .. "/" .. name .. ".bcf") then
+    local path, name = splitpath(name)
+    return(
+      runtool(path, dir, "BIBINPUTS",  biberexe .. " " .. biberopts .. " " .. name)
+    )
+  end
+  return 0
+end
+
+function bibtex(name, dir)
+  if fileexists(typesetdir .. "/" .. name .. ".aux") then
+    -- LaTeX always generates an .aux file, so there is a need to
+    -- look inside it for a \citation line
+    local grep
+    if os_type == "windows" then
+      grep = "\\\\"
+    else
+     grep = "\\\\\\\\"
+    end
+    local path, name = splitpath(name)
+    if run(
+        typesetdir,
+        os_grepexe .. " \"^" .. grep .. "citation{\" " .. name .. ".aux > "
+          .. os_null
+      ) + run(
+        typesetdir,
+        os_grepexe .. " \"^" .. grep .. "bibdata{\" " .. name .. ".aux > "
+          .. os_null
+      ) == 0 then
+      return(
+        -- Cheat slightly as we need to set two variables
+        runtool(
+          path, dir,
+          "BIBINPUTS",
+          os_setenv .. " BSTINPUTS=." .. os_pathsep
+            .. abspath(localdir)
+            .. (typesetsearch and os_pathsep or "") ..
+          os_concat ..
+          bibtexexe .. " " .. bibtexopts .. " " .. name
+        )
+      )
+    end
+  end
+  return 0
+end
+
+function makeindex(name, dir, inext, outext, logext, style)
+  if fileexists(typesetdir .. "/" .. name .. inext) then
+    local path, name = splitpath(name)
+    return(
+      runtool(
+        path, dir,
+        "INDEXSTYLE",
+        makeindexexe .. " " .. makeindexopts .. " "
+          .. " -s " .. style .. " -o " .. name .. outext
+          .. " -t " .. name .. " "  .. name .. inext
+      )
+    )
+  end
+  return 0
+end
+
+function tex(file, dir)
+  local path, name = splitpath(file)
+  return(
+    runtool(
+      path, dir,
+      "TEXINPUTS",
+      typesetexe .. " " .. typesetopts .. " \"" .. typesetcmds
+        .. "\\input " .. name .. "\""
+    )
+  )
+end
+
+function typesetpdf(file, dir)
+  local name = gsub(file, "%.[^.]+$", "")
+  print("Typesetting " .. name)
+  local errorlevel = typeset(file, dir)
+  if errorlevel == 0 then
+    name = name .. ".pdf"
+    os.remove(jobname(name))
+    cp(name, typesetdir, docfiledir)
+  else
+    print(" ! Compilation failed")
+  end
+  return errorlevel
+end
+
+typeset = typeset or function(file, dir)
+  dir = dir or "."
+  local errorlevel = tex(file, dir)
+  if errorlevel ~= 0 then
+    return errorlevel
+  else
+    local name = jobname(file)
+    errorlevel = biber(name, dir) + bibtex(name, dir)
+    if errorlevel == 0 then
+      local function cycle(name, dir)
+        return(
+          makeindex(name, dir, ".glo", ".gls", ".glg", glossarystyle) +
+          makeindex(name, dir, ".idx", ".ind", ".ilg", indexstyle)    +
+          tex(file, dir)
+        )
+      end
+      for i = 1, typesetruns do
+        errorlevel = cycle(name, dir)
+        if errorlevel ~= 0 then break end
+      end
+    end
+    return errorlevel
+  end
+end
+
+
+-- A hook to allow additional typesetting of demos
+typeset_demo_tasks = typeset_demo_tasks or function()
+  return 0
+end
+
+-- Typeset all required documents
+-- Uses a set of dedicated auxiliaries that need to be available to others
+function doc(files)
+  -- Set up
+  cleandir(typesetdir)
+  for _,filetype in pairs(
+      {bibfiles, docfiles, typesetfiles, typesetdemofiles}
+    ) do
+    for _,file in pairs(filetype) do
+      cp(file, docfiledir, typesetdir)
+    end
+  end
+  for _,file in pairs(sourcefiles) do
+    cp(file, sourcefiledir, typesetdir)
+  end
+  for _,file in pairs(typesetsuppfiles) do
+    cp(file, supportdir, typesetdir)
+  end
+  depinstall(typesetdeps)
+  unpack({sourcefiles, typesetsourcefiles}, {sourcefiledir, docfiledir})
+  -- Main loop for doc creation
+  local done = {}
+  local errorlevel = typeset_demo_tasks()
+  if errorlevel ~= 0 then
+    return errorlevel
+  end
+  for _, typesetfiles in ipairs({typesetdemofiles, typesetfiles}) do
+    for _,i in ipairs(typesetfiles) do
+      for _, dir in ipairs({unpackdir, typesetdir}) do
+        for j,_ in pairs(tree(dir, i)) do
+          if not done[j] then
+            j = gsub(j, "^%./", "")
+            -- Allow for command line selection of files
+            local typeset = true
+            if files and next(files) then
+              typeset = false
+              for _,k in ipairs(files) do
+                if k == gsub(j, "%.[^.]+$", "") then
+                  typeset = true
+                  break
+                end
+              end
+            end
+            if typeset then
+              local errorlevel = typesetpdf(j, dir)
+              if errorlevel ~= 0 then
+                return errorlevel
+              else
+                done[j] = true
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+  return 0
+end
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-unpack.lua b/Master/texmf-dist/tex/latex/l3build/l3build-unpack.lua
new file mode 100644
index 00000000000..9779502c2fc
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-unpack.lua
@@ -0,0 +1,99 @@
+--[[
+
+File l3build-unpack.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+local execute          = os.execute
+
+-- Unpack the package files using an 'isolated' system: this requires
+-- a copy of the 'basic' DocStrip program, which is used then removed
+function unpack(sources, sourcedirs)
+  local errorlevel = depinstall(unpackdeps)
+  if errorlevel ~= 0 then
+    return errorlevel
+  end
+  errorlevel = bundleunpack(sourcedirs, sources)
+  if errorlevel ~= 0 then
+    return errorlevel
+  end
+  for _,i in ipairs(installfiles) do
+    errorlevel = cp(i, unpackdir, localdir)
+    if errorlevel ~= 0 then
+      return errorlevel
+    end
+  end
+  return 0
+end
+
+-- Split off from the main unpack so it can be used on a bundle and not
+-- leave only one modules files
+bundleunpack = bundleunpack or function(sourcedirs, sources)
+  local errorlevel = mkdir(localdir)
+  if errorlevel ~=0 then
+    return errorlevel
+  end
+  errorlevel = cleandir(unpackdir)
+  if errorlevel ~=0 then
+    return errorlevel
+  end
+  for _,i in ipairs(sourcedirs or {sourcefiledir}) do
+    for _,j in ipairs(sources or {sourcefiles}) do
+      for _,k in ipairs(j) do
+        errorlevel = cp(k, i, unpackdir)
+        if errorlevel ~=0 then
+          return errorlevel
+        end
+      end
+    end
+  end
+  for _,i in ipairs(unpacksuppfiles) do
+    errorlevel = cp(i, supportdir, localdir)
+    if errorlevel ~=0 then
+      return errorlevel
+    end
+  end
+  for _,i in ipairs(unpackfiles) do
+    for j,_ in pairs(tree(unpackdir, i)) do
+      -- This 'yes' business is needed to pass a series of "y\n" to
+      -- TeX if \askforoverwrite is true
+      -- That is all done using a file as it's the only way on Windows and
+      -- on Unix the "yes" command can't be used inside execute (it never
+      -- stops, which confuses Lua)
+      execute(os_yes .. ">>" .. localdir .. "/yes")
+      local path, name = splitpath(j)
+      local localdir = abspath(localdir)
+      errorlevel = run(
+        unpackdir .. "/" .. path,
+        os_setenv .. " TEXINPUTS=." .. os_pathsep
+          .. localdir .. (unpacksearch and os_pathsep or "") ..
+        os_concat ..
+        unpackexe .. " " .. unpackopts .. " " .. name .. " < "
+          .. localdir .. "/yes"
+          .. (options["quiet"] and (" > " .. os_null) or "")
+      )
+      if errorlevel ~=0 then
+        return errorlevel
+      end
+    end
+  end
+  return 0
+end
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build-variables.lua b/Master/texmf-dist/tex/latex/l3build/l3build-variables.lua
new file mode 100644
index 00000000000..7115d1f86ae
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/l3build/l3build-variables.lua
@@ -0,0 +1,199 @@
+--[[
+
+File l3build-variables.lua Copyright (C) 2018 The LaTeX3 Project
+
+It may be distributed and/or modified under the conditions of the
+LaTeX Project Public License (LPPL), either version 1.3c of this
+license or (at your option) any later version.  The latest version
+of this license is in the file
+
+   http://www.latex-project.org/lppl.txt
+
+This file is part of the "l3build bundle" (The Work in LPPL)
+and all files in that bundle must be distributed together.
+
+-----------------------------------------------------------------------
+
+The development version of the bundle can be found at
+
+   https://github.com/latex3/l3build
+
+for those people who are interested.
+
+--]]
+
+local exit             = os.exit
+
+-- "module" is a deprecated function in Lua 5.2: as we want the name
+-- for other purposes, and it should eventually be 'free', simply
+-- remove the built-in
+if type(module) == "function" then
+  module = nil
+end
+
+-- Ensure the module and bundle exist
+module = module or ""
+bundle = bundle or ""
+
+-- Sanity check
+if module == "" and bundle == "" then
+  if string.match(arg[0], "l3build%.lua$") then
+    print(
+      "\n" ..
+      "l3build: A testing and building system for LaTeX\n\n" ..
+      "Release " .. release_date
+    )
+    if arg[1] and not string.match(arg[1], "version") then
+      print(
+        "\n"
+          .. "Error: Call l3build using a configuration file, not directly.\n"
+      )
+    end
+  else
+    print(
+      "\n"
+        .. "Error: Specify either bundle or module in configuration script.\n"
+    )
+  end
+  exit(1)
+end
+
+-- Directory structure for the build system
+-- Use Unix-style path separators
+currentdir = "."
+maindir    = maindir or currentdir
+
+-- Substructure for file locations
+docfiledir    = docfiledir    or currentdir
+sourcefiledir = sourcefiledir or currentdir
+supportdir    = supportdir    or maindir .. "/support"
+testfiledir   = testfiledir   or currentdir .. "/testfiles"
+testsuppdir   = testsuppdir   or testfiledir .. "/support"
+
+-- Structure within a development area
+builddir   = builddir   or maindir .. "/build"
+distribdir = distribdir or builddir .. "/distrib"
+localdir   = localdir   or builddir .. "/local"
+testdir    = testdir    or builddir .. "/test"
+typesetdir = typesetdir or builddir .. "/doc"
+unpackdir  = unpackdir  or builddir .. "/unpacked"
+
+-- Substructure for CTAN release material
+ctandir = ctandir or distribdir .. "/ctan"
+tdsdir  = tdsdir  or distribdir .. "/tds"
+tdsroot = tdsroot or "latex"
+
+-- Location for installation on CTAN or in TEXMFHOME
+if bundle == "" then
+  moduledir = tdsroot .. "/" .. module
+  ctanpkg   = ctanpkg or module
+else
+  moduledir = tdsroot .. "/" .. bundle .. "/" .. module
+  ctanpkg   = ctanpkg or bundle
+end
+
+-- File types for various operations
+-- Use Unix-style globs
+-- All of these may be set earlier, so a initialised conditionally
+auxfiles           = auxfiles           or {"*.aux", "*.lof", "*.lot", "*.toc"}
+bibfiles           = bibfiles           or {"*.bib"}
+binaryfiles        = binaryfiles        or {"*.pdf", "*.zip"}
+bstfiles           = bstfiles           or {"*.bst"}
+checkfiles         = checkfiles         or { }
+checksuppfiles     = checksuppfiles     or { }
+cleanfiles         = cleanfiles         or {"*.log", "*.pdf", "*.zip"}
+demofiles          = demofiles          or { }
+docfiles           = docfiles           or { }
+excludefiles       = excludefiles       or {"*~"}
+installfiles       = installfiles       or {"*.sty","*.cls"}
+makeindexfiles     = makeindexfiles     or {"*.ist"}
+sourcefiles        = sourcefiles        or {"*.dtx", "*.ins"}
+textfiles          = textfiles          or {"*.md", "*.txt"}
+typesetdemofiles   = typesetdemofiles   or { }
+typesetfiles       = typesetfiles       or {"*.dtx"}
+typesetsuppfiles   = typesetsuppfiles   or { }
+typesetsourcefiles = typesetsourcefiles or { }
+unpackfiles        = unpackfiles        or {"*.ins"}
+unpacksuppfiles    = unpacksuppfiles    or { }
+versionfiles       = versionfiles       or {"*.dtx"}
+
+-- Roots which should be unpacked to support unpacking/testing/typesetting
+checkdeps   = checkdeps   or { }
+typesetdeps = typesetdeps or { }
+unpackdeps  = unpackdeps  or { }
+
+-- Executable names plus following options
+typesetexe = typesetexe or "pdflatex"
+unpackexe  = unpackexe  or "tex"
+zipexe     = zipexe     or "zip"
+
+checkopts   = checkopts   or "-interaction=nonstopmode"
+typesetopts = typesetopts or "-interaction=nonstopmode"
+unpackopts  = unpackopts  or ""
+zipopts     = zipopts     or "-v -r -X"
+
+-- Engines for testing
+checkengines = checkengines or {"pdftex", "xetex", "luatex"}
+checkformat  = checkformat  or "latex"
+stdengine    = stdengine    or "pdftex"
+
+-- Configs for testing
+stdconfig    = stdconfig    or string.gsub(arg[0], "%.lua$", "")
+checkconfigs = checkconfigs or {stdconfig}
+
+-- Enable access to trees outside of the repo
+-- As these may be set false, a more elaborate test than normal is needed
+if checksearch == nil then
+  checksearch = true
+end
+if typesetsearch == nil then
+  typesetsearch = true
+end
+if unpacksearch == nil then
+  unpacksearch = true
+end
+
+-- Additional settings to fine-tune typesetting
+glossarystyle = glossarystyle or "gglo.ist"
+indexstyle    = indexstyle    or "gind.ist"
+
+-- Supporting binaries and options
+biberexe      = biberexe      or "biber"
+biberopts     = biberopts     or ""
+bibtexexe     = bibtexexe     or "bibtex8"
+bibtexopts    = bibtexopts    or "-W"
+makeindexexe  = makeindexexe  or "makeindex"
+makeindexopts = makeindexopts or ""
+
+-- Forcing epoch
+if forcecheckepoch == nil then
+  forcecheckepoch = true
+end
+if forcedocepoch == nil then
+  forcedocepoch = true
+end
+
+-- Other required settings
+asciiengines = asciiengines or {"pdftex"}
+checkruns    = checkruns    or 1
+epoch        = epoch        or 1463734800
+maxprintline = maxprintline or 79
+packtdszip   = packtdszip   or false
+scriptname   = scriptname   or "build.lua"
+typesetcmds  = typesetcmds  or ""
+typesetruns  = typesetruns  or 2
+versionform  = versionform  or ""
+recordstatus = recordstatus or false
+
+-- Extensions for various file types: used to abstract out stuff a bit
+bakext = bakext or ".bak"
+dviext = dviext or ".dvi"
+logext = logext or ".log"
+lveext = lveext or ".lve"
+lvtext = lvtext or ".lvt"
+pdfext = pdfext or ".pdf"
+psext  = psext  or ".ps"
+tlgext = tlgext or ".tlg"
+
+-- Manifest options
+manifestfile = "MANIFEST.md"
diff --git a/Master/texmf-dist/tex/latex/l3build/l3build.lua b/Master/texmf-dist/tex/latex/l3build/l3build.lua
index c4c76c7a1bb..b18c2cbea87 100644
--- a/Master/texmf-dist/tex/latex/l3build/l3build.lua
+++ b/Master/texmf-dist/tex/latex/l3build/l3build.lua
@@ -23,2511 +23,44 @@ for those people who are interested.
 --]]
 
 -- Version information
-release_date = "2017/12/12"
-
--- "module" is a deprecated function in Lua 5.2: as we want the name
--- for other purposes, and it should eventually be 'free', simply
--- remove the built-in
-if type(module) == "function" then
-  module = nil
-end
-
--- Ensure the module and bundle exist
-module = module or ""
-bundle = bundle or ""
-
--- Sanity check
-if module == "" and bundle == "" then
-  if string.match(arg[0], "l3build%.lua$") then
-    print(
-      "\n" ..
-      "l3build: A testing and building system for LaTeX\n\n" ..
-      "Release " .. release_date
-    )
-    if arg[1] and not string.match(arg[1], "version") then
-      print(
-        "\n"
-          .. "Error: Call l3build using a configuration file, not directly.\n"
-      )
-    end
-  else
-    print(
-      "\n"
-        .. "Error: Specify either bundle or module in configuration script.\n"
-    )
-  end
-  os.exit(1)
-end
-
--- Directory structure for the build system
--- Use Unix-style path separators
-currentdir = "."
-maindir    = maindir or currentdir
-
--- Substructure for file locations
-docfiledir    = docfiledir    or currentdir
-sourcefiledir = sourcefiledir or currentdir
-supportdir    = supportdir    or maindir .. "/support"
-testfiledir   = testfiledir   or currentdir .. "/testfiles"
-testsuppdir   = testsuppdir   or testfiledir .. "/support"
-
--- Structure within a development area
-builddir   = builddir   or maindir .. "/build"
-distribdir = distribdir or builddir .. "/distrib"
-localdir   = localdir   or builddir .. "/local"
-testdir    = testdir    or builddir .. "/test"
-typesetdir = typesetdir or builddir .. "/doc"
-unpackdir  = unpackdir  or builddir .. "/unpacked"
-
--- Substructure for CTAN release material
-ctandir = ctandir or distribdir .. "/ctan"
-tdsdir  = tdsdir  or distribdir .. "/tds"
-tdsroot = tdsroot or "latex"
-
--- Location for installation on CTAN or in TEXMFHOME
-if bundle == "" then
-  moduledir = tdsroot .. "/" .. module
-  ctanpkg   = ctanpkg or module
-else
-  moduledir = tdsroot .. "/" .. bundle .. "/" .. module
-  ctanpkg   = ctanpkg or bundle
-end
-
--- File types for various operations
--- Use Unix-style globs
--- All of these may be set earlier, so a initialised conditionally
-bibfiles           = bibfiles           or {"*.bib"}
-binaryfiles        = binaryfiles        or {"*.pdf", "*.zip"}
-bstfiles           = bstfiles           or {"*.bst"}
-checkfiles         = checkfiles         or { }
-checksuppfiles     = checksuppfiles     or { }
-cmdchkfiles        = cmdchkfiles        or { }
-cleanfiles         = cleanfiles         or {"*.log", "*.pdf", "*.zip"}
-demofiles          = demofiles          or { }
-docfiles           = docfiles           or { }
-excludefiles       = excludefiles       or {"*~"}
-installfiles       = installfiles       or {"*.sty","*.cls"}
-makeindexfiles     = makeindexfiles     or {"*.ist"}
-sourcefiles        = sourcefiles        or {"*.dtx", "*.ins"}
-textfiles          = textfiles          or {"*.md", "*.txt"}
-typesetdemofiles   = typesetdemofiles   or { }
-typesetfiles       = typesetfiles       or {"*.dtx"}
-typesetsuppfiles   = typesetsuppfiles   or { }
-typesetsourcefiles = typesetsourcefiles or { }
-unpackfiles        = unpackfiles        or {"*.ins"}
-unpacksuppfiles    = unpacksuppfiles    or { }
-versionfiles       = versionfiles       or {"*.dtx"}
-
--- Roots which should be unpacked to support unpacking/testing/typesetting
-checkdeps   = checkdeps   or { }
-typesetdeps = typesetdeps or { }
-unpackdeps  = unpackdeps  or { }
-
--- Executable names plus following options
-typesetexe = typesetexe or "pdflatex"
-unpackexe  = unpackexe  or "tex"
-zipexe     = zipexe     or "zip"
-
-checkopts   = checkopts   or "-interaction=nonstopmode"
-cmdchkopts  = cmdchkopts  or "-interaction=batchmode"
-typesetopts = typesetopts or "-interaction=nonstopmode"
-unpackopts  = unpackopts  or ""
-zipopts     = zipopts     or "-v -r -X"
-
--- Engines for testing
-checkengines = checkengines or {"pdftex", "xetex", "luatex"}
-checkformat  = checkformat  or "latex"
-stdengine    = stdengine    or "pdftex"
-
--- Configs for testing
-stdconfig    = stdconfig    or string.gsub(arg[0], "%.lua$", "")
-checkconfigs = checkconfigs or {stdconfig}
-
--- Enable access to trees outside of the repo
--- As these may be set false, a more elaborate test than normal is needed
-if checksearch == nil then
-  checksearch = true
-end
-if typesetsearch == nil then
-  typesetsearch = true
-end
-if unpacksearch == nil then
-  unpacksearch = true
-end
-
--- Additional settings to fine-tune typesetting
-glossarystyle = glossarystyle or "gglo.ist"
-indexstyle    = indexstyle    or "gind.ist"
-
--- Supporting binaries and options
-biberexe      = biberexe      or "biber"
-biberopts     = biberopts     or ""
-bibtexexe     = bibtexexe     or "bibtex8"
-bibtexopts    = bibtexopts    or "-W"
-makeindexexe  = makeindexexe  or "makeindex"
-makeindexopts = makeindexopts or ""
-
--- Forcing epoch
-if forcecheckepoch == nil then
-  forcecheckepoch = true
-end
-if forcedocepoch == nil then
-  forcedocepoch = true
-end
-
--- Other required settings
-asciiengines = asciiengines or {"pdftex"}
-checkruns    = checkruns    or 1
-epoch        = epoch        or 1463734800
-maxprintline = maxprintline or 79
-packtdszip   = packtdszip   or false
-scriptname   = scriptname   or "build.lua"
-typesetcmds  = typesetcmds  or ""
-typesetruns  = typesetruns  or 2
-versionform  = versionform  or ""
-recordstatus = recordstatus or false
-
--- Extensions for various file types: used to abstract out stuff a bit
-bakext = bakext or ".bak"
-dviext = dviext or ".dvi"
-logext = logext or ".log"
-lveext = lveext or ".lve"
-lvtext = lvtext or ".lvt"
-pdfext = pdfext or ".pdf"
-psext  = psext  or ".ps"
-tlgext = tlgext or ".tlg"
+release_date = "2018/01/10"
 
 -- File operations are aided by the LuaFileSystem module
 local lfs = require("lfs")
 
 -- Local access to functions
+
 local assert           = assert
 local ipairs           = ipairs
 local next             = next
 local print            = print
 local select           = select
 local tonumber         = tonumber
-local close            = io.close
-local lines            = io.lines
-local open             = io.open
-local output           = io.output
-local stderr           = io.stderr
-local write            = io.write
-local set_program_name = kpse.set_program_name
-local var_value        = kpse.var_value
-local lfs_attributes   = lfs.attributes
-local lfs_dir          = lfs.dir
-local os_date          = os.date
-local execute          = os.execute
 local exit             = os.exit
-local getenv           = os.getenv
-local os_remove        = os.remove
-local os_time          = os.time
-local os_type          = os.type
-local len              = string.len
-local luatex_revision  = status.luatex_revision
-local luatex_version   = status.luatex_version
-local char             = string.char
-local find             = string.find
-local format           = string.format
-local gmatch           = string.gmatch
-local gsub             = string.gsub
-local len              = string.len
-local match            = string.match
-local rep              = string.rep
-local sort             = table.sort
-local sub              = string.sub
-local concat           = table.concat
-local insert           = table.insert
-local utf8_char        = unicode.utf8.char
-
--- Parse command line options
-
-local option_list =
-  {
-    config =
-      {
-        desc  = "Sets the config(s) used for running tests",
-        short = "c",
-        type  = "table"
-      },
-    date =
-      {
-        desc  = "Sets the date to insert into sources",
-        short = "d",
-        type  = "string"
-      },
-    engine =
-      {
-        desc  = "Sets the engine(s) to use for running test",
-        short = "e",
-        type  = "table"
-      },
-    epoch =
-      {
-        desc  = "Sets the epoch for tests and typesetting",
-        short = "E",
-        type  = "string"
-      },
-    force =
-      {
-        desc  = "Force tests to run if engine is not set up",
-        short = "f",
-        type  = "boolean"
-      },
-    ["halt-on-error"] =
-      {
-        desc  = "Stops running tests after the first failure",
-        short = "H",
-        type  = "boolean"
-      },
-    help =
-      {
-        short = "h",
-        type  = "boolean"
-      },
-    pdf =
-      {
-        desc  = "Check/save PDF files",
-        short = "p",
-        type  = "boolean"
-      },
-    quiet =
-      {
-        desc  = "Suppresses TeX output when unpacking",
-        short = "q",
-        type  = "boolean"
-      },
-    rerun =
-      {
-        desc  = "Skip setup: simply rerun tests",
-        short = "r",
-        type  = "boolean"
-      },
-    version =
-      {
-        desc  = "Sets the version to insert into sources",
-        short = "v",
-        type  = "string"
-      },
-  }
-
--- This is done as a function (rather than do ... end) as it allows early
--- termination (break)
-local function argparse()
-  local result = { }
-  local files  = { }
-  local long_options =  { }
-  local short_options = { }
-  -- Turn long/short options into two lookup tables
-  for k,v in pairs(option_list) do
-    short_options[v["short"]] = k
-    long_options[k] = k
-  end
-  local args = args
-  -- arg[1] is a special case: must be a command or "-h"/"--help"
-  -- Deal with this by assuming help and storing only apparently-valid
-  -- input
-  local a = arg[1]
-  result["target"] = "help"
-  if a then
-    -- No options are allowed in position 1, so filter those out
-    if not match(a, "^%-") then
-      result["target"] = a
-    end
-  end
-  -- Stop here if help is required
-  if result["target"] == "help" then
-    return result
-  end
-  -- An auxiliary to grab all file names into a table
-  local function remainder(num)
-    local files = { }
-    for i = num, #arg do
-      insert(files, arg[i])
-    end
-    return files
-  end
-  -- Examine all other arguments
-  -- Use a while loop rather than for as this makes it easier
-  -- to grab arg for optionals where appropriate
-  local i = 2
-  while i <= #arg do
-    local a = arg[i]
-    -- Terminate search for options
-    if a == "--" then
-      files = remainder(i + 1)
-      break
-    end
-    -- Look for optionals
-    local opt
-    local optarg
-    local opts
-    -- Look for and option and get it into a variable
-    if match(a, "^%-") then
-      if match(a, "^%-%-") then
-        opts = long_options
-        local pos = find(a, "=", 1, true)
-        if pos then
-          opt    = sub(a, 3, pos - 1)
-          optarg = sub(a, pos + 1)
-        else
-          opt = sub(a, 3)
-        end
-      else
-        opts = short_options
-        opt  = sub(a, 2, 2)
-        -- Only set optarg if it is there
-        if #a > 2 then
-          optarg = sub(a, 3)
-        end
-      end
-      -- Now check that the option is valid and sort out the argument
-      -- if required
-      local optname = opts[opt]
-      if optname then
-        -- Tidy up arguments
-        if option_list[optname]["type"] == "boolean" then
-          if optarg then
-            local opt = "-" .. (match(a, "^%-%-") and "-" or "") .. opt
-            stderr:write("Value not allowed for option " .. opt .."\n")
-            return {"help"}
-          end
-        else
-         if not optarg then
-          optarg = arg[i + 1]
-          if not optarg then
-            stderr:write("Missing value for option " .. a .."\n")
-            return {"help"}
-          end
-          i = i + 1
-         end
-        end
-      else
-        stderr:write("Unknown option " .. a .."\n")
-        return {"help"}
-      end
-      -- Store the result
-      if optarg then
-        if option_list[optname]["type"] == "string" then
-          result[optname] = optarg
-        else
-          local opts = result[optname] or { }
-          for hit in gmatch(optarg, "([^,%s]+)") do
-            insert(opts, hit)
-          end
-          result[optname] = opts
-        end
-      else
-        result[optname] = true
-      end
-      i = i + 1
-    end
-    if not opt then
-      files = remainder(i)
-      break
-    end
-  end
-  if next(files) then
-   result["files"] = files
-  end
-  return result
-end
-
-options = argparse()
-
--- Sanity check
-if options["engine"] and not options["force"] then
-   -- Make a lookup table
-   local t = { }
-  for _, engine in pairs(checkengines) do
-    t[engine] = true
-  end
-  for _, engine in pairs(options["engine"]) do
-    if not t[engine] then
-      print("\n! Error: Engine \"" .. engine .. "\" not set up for testing!")
-      print("\n  Valid values are:")
-      for _, engine in ipairs(checkengines) do
-        print("  - " .. engine)
-      end
-      print("")
-      exit(1)
-    end
-  end
-end
-
--- Tidy up the epoch setting
--- Force an epoch if set at the command line
-if options["epoch"] then
-  epoch           = options["epoch"]
-  forcecheckepoch = true
-  forcedocepoch   = true
-end
--- If given as an ISO date, turn into an epoch number
-do
-  local y, m, d = match(epoch, "^(%d%d%d%d)-(%d%d)-(%d%d)$")
-  if y then
-    epoch =
-      os_time({year = y, month = m, day = d, hour = 0, sec = 0, isdst = nil}) -
-      os_time({year = 1970, month = 1, day = 1, hour = 0, sec = 0, isdst = nil})
-  elseif match(epoch, "^%d+$") then
-    epoch = tonumber(epoch)
-  else
-    epoch = 0
-  end
-end
-
--- Convert a file glob into a pattern for use by e.g. string.gub
--- Based on https://github.com/davidm/lua-glob-pattern
--- Simplified substantially: "[...]" syntax not supported as is not
--- required by the file patterns used by the team. Also note style
--- changes to match coding approach in rest of this file.
---
--- License for original globtopattern
---[[
-
-   (c) 2008-2011 David Manura.  Licensed under the same terms as Lua (MIT).
-
-  Permission is hereby granted, free of charge, to any person obtaining a copy
-  of this software and associated documentation files (the "Software"), to deal
-  in the Software without restriction, including without limitation the rights
-  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-  copies of the Software, and to permit persons to whom the Software is
-  furnished to do so, subject to the following conditions:
-
-  The above copyright notice and this permission notice shall be included in
-  all copies or substantial portions of the Software.
-
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-  THE SOFTWARE.
-  (end license)
-
---]]
-local function glob_to_pattern(glob)
-
-  local pattern = "^" -- pattern being built
-  local i = 0 -- index in glob
-  local char -- char at index i in glob
-
-  -- escape pattern char
-  local function escape(char)
-    return match(char, "^%w$") and char or "%" .. char
-  end
-
-  -- Convert tokens.
-  while true do
-    i = i + 1
-    char = sub(glob, i, i)
-    if char == "" then
-      pattern = pattern .. "$"
-      break
-    elseif char == "?" then
-      pattern = pattern .. "."
-    elseif char == "*" then
-      pattern = pattern .. ".*"
-    elseif char == "[" then
-      -- Ignored
-      print("[...] syntax not supported in globs!")
-    elseif char == "\\" then
-      i = i + 1
-      char = sub(glob, i, i)
-      if char == "" then
-        pattern = pattern .. "\\$"
-        break
-      end
-      pattern = pattern .. escape(char)
-    else
-      pattern = pattern .. escape(char)
-    end
-  end
-  return pattern
-end
-
--- Detect the operating system in use
--- Support items are defined here for cases where a single string can cover
--- both Windows and Unix cases: more complex situations are handled inside
--- the support functions
-os_concat  = ";"
-os_null    = "/dev/null"
-os_pathsep = ":"
-os_setenv  = "export"
-os_yes     = "printf 'y\\n%.0s' {1..200}"
-local os_ascii   = "echo \"\""
-local os_cmpexe  = getenv("cmpexe") or "cmp"
-local os_cmpext  = getenv("cmpext") or ".cmp"
-local os_diffext = getenv("diffext") or ".diff"
-local os_diffexe = getenv("diffexe") or "diff -c --strip-trailing-cr"
-local os_grepexe = "grep"
-local os_newline = "\n"
-if os_type == "windows" then
-  os_ascii   = "@echo."
-  os_cmpexe  = getenv("cmpexe") or "fc /b"
-  os_cmpext  = getenv("cmpext") or ".cmp"
-  os_concat  = "&"
-  os_diffext = getenv("diffext") or ".fc"
-  os_diffexe = getenv("diffexe") or "fc /n"
-  os_grepexe = "findstr /r"
-  os_newline = "\n"
-  if tonumber(luatex_version) < 100 or
-     (tonumber(luatex_version) == 100
-       and tonumber(luatex_revision) < 4) then
-    os_newline = "\r\n"
-  end
-  os_null    = "nul"
-  os_pathsep = ";"
-  os_setenv  = "set"
-  os_yes     = "for /l %I in (1,1,200) do @echo y"
-end
-
--- Return an absolute path from a relative one
-function abspath(path)
-  local oldpwd = lfs.currentdir()
-  lfs.chdir(path)
-  local result = lfs.currentdir()
-  lfs.chdir(oldpwd)
-  return gsub(result, "\\", "/")
-end
-
--- For cleaning out a directory, which also ensures that it exists
-function cleandir(dir)
-  local errorlevel = mkdir(dir)
-  if errorlevel ~= 0 then
-    return errorlevel
-  end
-  return rm(dir, "*")
-end
-
--- Copy files 'quietly'
-function cp(glob, source, dest)
-  local errorlevel
-  for i,_ in pairs(tree(source, glob)) do
-    local source = source .. "/" .. i
-    if os_type == "windows" then
-      if lfs_attributes(source)["mode"] == "directory" then
-        errorlevel = execute(
-          'xcopy /y /e /i "' .. unix_to_win(source) .. '" "'
-             .. unix_to_win(dest .. '/' .. i) .. '" > nul'
-        )
-      else
-        errorlevel = execute(
-          'xcopy /y "' .. unix_to_win(source) .. '" "'
-             .. unix_to_win(dest .. '/') .. '" > nul'
-        )
-      end
-    else
-      errorlevel = execute("cp -RLf '" .. source .. "' '" .. dest .. "'")
-    end
-    if errorlevel ~=0 then
-      return errorlevel
-    end
-  end
-  return 0
-end
-
--- OS-dependent test for a directory
-function direxists(dir)
-  local errorlevel
-  if os_type == "windows" then
-    errorlevel =
-      execute("if not exist \"" .. unix_to_win(dir) .. "\" exit 1")
-  else
-    errorlevel = execute("[ -d " .. dir .. " ]")
-  end
-  if errorlevel ~= 0 then
-    return false
-  end
-  return true
-end
-
-function fileexists(file)
-  local f = open(file, "r")
-  if f ~= nil then
-    close(f)
-    return true
-  else
-    return false
-  end
-end
-
--- Generate a table containing all file names of the given glob or all files
--- if absent
-function filelist(path, glob)
-  local files = { }
-  local pattern
-  if glob then
-    pattern = glob_to_pattern(glob)
-  end
-  if direxists(path) then
-    for entry in lfs_dir(path) do
-      if pattern then
-        if match(entry, pattern) then
-          insert(files, entry)
-        end
-      else
-        if entry ~= "." and entry ~= ".." then
-          insert(files, entry)
-        end
-      end
-    end
-  end
-  return files
-end
-
--- Does what filelist does, but can also glob subdirectories. In the returned
--- table, the keys are paths relative to the given starting path, the values
--- are their counterparts relative to the current working directory.
-function tree(path, glob)
-  local function cropdots(path)
-    return gsub(gsub(path, "^%./", ""), "/%./", "/")
-  end
-  local function always_true()
-    return true
-  end
-  local function is_dir(file)
-    return lfs_attributes(file)["mode"] == "directory"
-  end
-  local dirs = {["."] = cropdots(path)}
-  for pattern, criterion in gmatch(cropdots(glob), "([^/]+)(/?)") do
-    local criterion = criterion == "/" and is_dir or always_true
-    function fill(path, dir, table)
-      for _, file in ipairs(filelist(dir, pattern)) do
-        local fullpath = path .. "/" .. file
-        if file ~= "." and file ~= ".." and
-          fullpath ~= builddir and
-          (sub(pattern, 1, 1) == "."
-            or sub(file, 1, 1) ~= ".")
-        then
-          local fulldir = dir .. "/" .. file
-          if criterion(fulldir) then
-            table[fullpath] = fulldir
-          end
-        end
-      end
-    end
-    local newdirs = {}
-    if pattern == "**" then
-      while true do
-        path, dir = next(dirs)
-        if not path then
-          break
-        end
-        dirs[path] = nil
-        newdirs[path] = dir
-        fill(path, dir, dirs)
-      end
-    else
-      for path, dir in pairs(dirs) do
-        fill(path, dir, newdirs)
-      end
-    end
-    dirs = newdirs
-  end
-  return dirs
-end
-
-function mkdir(dir)
-  if os_type == "windows" then
-    -- Windows (with the extensions) will automatically make directory trees
-    -- but issues a warning if the dir already exists: avoid by including a test
-    local dir = unix_to_win(dir)
-    return execute(
-      "if not exist "  .. dir .. "\\nul " .. "mkdir " .. dir
-    )
-  else
-    return execute("mkdir -p " .. dir)
-  end
-end
-
--- Rename
-function ren(dir, source, dest)
-  local dir = dir .. "/"
-  if os_type == "windows" then
-    local source = gsub(source, "^%.+/", "")
-    local dest = gsub(dest, "^%.+/", "")
-    return execute("ren " .. unix_to_win(dir) .. source .. " " .. dest)
-  else
-    return execute("mv " .. dir .. source .. " " .. dir .. dest)
-  end
-end
-
--- Remove file(s) based on a glob
-function rm(source, glob)
-  for _,i in ipairs(filelist(source, glob)) do
-    os_remove(source .. "/" .. i)
-  end
-  -- os_remove doesn't give a sensible errorlevel
-  return 0
-end
-
--- Remove a directory tree
-function rmdir(dir)
-  -- First, make sure it exists to avoid any errors
-  mkdir(dir)
-  if os_type == "windows" then
-    return execute("rmdir /s /q " .. unix_to_win(dir))
-  else
-    return execute("rm -r " .. dir)
-  end
-end
-
--- Run a command in a given directory
-function run(dir, cmd)
-  return execute("cd " .. dir .. os_concat .. cmd)
-end
-
--- Deal with the fact that Windows and Unix use different path separators
-function unix_to_win(path)
-  return gsub(path, "/", "\\")
-end
-
---
--- Auxiliary functions which are used by more than one main function
---
-
--- Do some subtarget for all modules in a bundle
-function call(dirs, target, opts)
-  -- Turn the option table into a string
-  local opts = opts or options
-  local s = ""
-  for k,v in pairs(opts) do
-    if k ~= "files" and k ~= "target" then -- Special cases
-      local t = option_list[k] or { }
-      local arg = ""
-      if t["type"] == "string" then
-        arg = arg .. "=" .. v
-      end
-      if t["type"] == "table" then
-        for _,a in pairs(v) do
-          if arg == "" then
-            arg = "=" .. a -- Add the initial "=" here
-          else
-            arg = arg .. "," .. a
-          end
-        end
-      end
-      s = s .. " --" .. k .. arg
-    end
-  end
-  if opts["files"] then
-    for _,v in pairs(opts["files"]) do
-      s = s .. " " .. v
-    end
-  end
-  for _,i in ipairs(dirs) do
-    print(
-      "Running script " .. scriptname .. " with target \"" .. target
-        .. "\" for module "
-        .. i
-    )
-    local errorlevel = run(
-      i,
-      "texlua " .. scriptname .. " " .. target .. s
-    )
-    if errorlevel ~= 0 then
-      return errorlevel
-    end
-  end
-  return 0
-end
-
--- Set up the check system files: needed for checking one or more tests and
--- for saving the test files
-function checkinit()
-  cleandir(testdir)
-  depinstall(checkdeps)
-  -- Copy dependencies to the test directory itself: this makes the paths
-  -- a lot easier to manage, and is important for dealing with the log and
-  -- with file input/output tests
-  for _,i in ipairs(filelist(localdir)) do
-    cp(i, localdir, testdir)
-  end
-  bundleunpack({sourcefiledir, testfiledir})
-  for _,i in ipairs(installfiles) do
-    cp(i, unpackdir, testdir)
-  end
-  for _,i in ipairs(checkfiles) do
-    cp(i, unpackdir, testdir)
-  end
-  if direxists(testsuppdir) then
-    for _,i in ipairs(filelist(testsuppdir)) do
-      cp(i, testsuppdir, testdir)
-    end
-  end
-  for _,i in ipairs(checksuppfiles) do
-    cp(i, supportdir, testdir)
-  end
-  execute(os_ascii .. ">" .. testdir .. "/ascii.tcx")
-end
-
--- Copy files to the main CTAN release directory
-function copyctan()
-  local ctantarget = ctanpkg
-  if docfiledir ~= currentdir then
-    ctantarget = ctanpkg .. "/" .. gsub(docfiledir, "^%.*/", "")
-  end
-  mkdir(ctandir .. "/" .. ctantarget)
-  for _,filetype in pairs(
-      {
-        bibfiles,
-        demofiles,
-        docfiles,
-        pdffiles,
-        typesetlist
-      }
-    ) do
-    for _,file in pairs(filetype) do
-      cp(file, docfiledir, ctandir .. "/" .. ctantarget)
-    end
-  end
-  ctantarget = ctanpkg
-  if sourcefiledir ~= currentdir then
-    ctantarget = ctanpkg .. "/" .. gsub(sourcefiledir, "^%.*/", "")
-  end
-  mkdir(ctandir .. "/" .. ctantarget)
-  for _,file in pairs(sourcefiles) do
-    if sourcedir ~= currentdir then
-    end
-    cp(file, sourcefiledir, ctandir .. "/" .. ctantarget)
-  end
-  for _,file in pairs(textfiles) do
-    cp(file, currentdir, ctandir .. "/" .. ctanpkg)
-  end
-end
-
--- Copy files to the correct places in the TDS tree
-function copytds()
-  local function install(source, dest, files, tool)
-    local moduledir = moduledir
-    -- For material associated with secondary tools (BibTeX, MakeIndex)
-    -- the structure needed is slightly different from those items going
-    -- into the tex/doc/source trees
-    if tool then
-      -- "base" is reserved for the tools themselves: make the assumption
-      -- in this case that the tdsroot name is the right place for stuff to
-      -- go (really just for the team)
-      if module == "base" then
-        moduledir = tdsroot
-      else
-        moduledir = module
-      end
-    end
-    -- Convert the file table(s) to a list of individual files
-    local filenames = { }
-    for _,i in ipairs(files) do
-      for _,j in ipairs(i) do
-        for file,_ in pairs(tree(source, j)) do
-          insert(filenames, file)
-        end
-      end
-    end
-    -- The target is only created if there are actual files to install
-    if next(filenames) ~= nil then
-      local installdir = tdsdir .. "/" .. dest .. "/" .. moduledir
-      mkdir(installdir)
-      for _,i in ipairs(filenames) do
-        cp(i, source, installdir)
-      end
-    end
-  end
-  install(
-    docfiledir,
-    "doc",
-    {bibfiles, demofiles, docfiles, pdffiles, textfiles, typesetlist}
-  )
-  install(unpackdir, "makeindex", {makeindexfiles}, true)
-  install(unpackdir, "bibtex/bst", {bstfiles}, true)
-  install(sourcefiledir, "source", {sourcelist})
-  install(unpackdir, "tex", {installfiles})
-end
 
--- Unpack files needed to support testing/typesetting/unpacking
-function depinstall(deps)
-  local errorlevel
-  for _,i in ipairs(deps) do
-    print("Installing dependency: " .. i)
-    errorlevel = run(i, "texlua " .. scriptname .. " unpack -q")
-    if errorlevel ~= 0 then
-      return errorlevel
-    end
-  end
-  return 0
-end
-
--- Convert the raw log file into one for comparison/storage: keeps only
--- the 'business' part from the tests and removes system-dependent stuff
-local function formatlog(logfile, newfile, engine, errlevels)
-  local maxprintline = maxprintline
-  if engine == "luatex" or engine == "luajittex" then
-    maxprintline = maxprintline + 1 -- Deal with an out-by-one error
-  end
-  local function killcheck(line)
-      -- Skip lines containing file dates
-      if match(line, "[^<]%d%d%d%d/%d%d/%d%d") then
-        return true
-      elseif
-      -- Skip \openin/\openout lines in web2c 7.x
-      -- As Lua doesn't allow "(in|out)", a slightly complex approach:
-      -- do a substitution to check the line is exactly what is required!
-        match(
-          gsub(line, "^\\openin", "\\openout"), "^\\openout%d%d? = "
-        ) then
-        return true
-      end
-    return false
-  end
-    -- Substitutions to remove some non-useful changes
-  local function normalize(line, lastline)
-    -- Zap line numbers from \show, \showbox, \box_show and the like:
-    -- do this before wrapping lines
-    line = gsub(line, "^l%.%d+ ", "l. ...")
-    -- Also from lua stack traces.
-    line = gsub(line, "lua:%d+: in function", "lua:...: in function")
-    -- Allow for wrapped lines: preserve the content and wrap
-    -- Skip lines that have an explicit marker for truncation
-    if len(line) == maxprintline  and
-       not match(line, "%.%.%.$") then
-      return "", (lastline or "") .. line
-    end
-    local line = (lastline or "") .. line
-    lastline = ""
-    -- Zap ./ at begin of filename
-    line = gsub(line, "%(%.%/", "(")
-    -- Zap paths if places other than 'here' are accessible
-    if checksearch then
-      -- The pattern excludes < and > as the image part can have
-      -- several entries on one line
-      local pattern = "%w?:?/[^ %<%>]*/([^/%(%)]*%.%w*)"
-      -- Files loaded from TeX: all start ( -- )
-      line = gsub(line, "%(" .. pattern, "(../%1")
-      -- Images
-      line = gsub(line, "<" .. pattern .. ">", "<../%1>")
-      -- luaotfload files start with keywords
-      line = gsub(line, "from " .. pattern .. "%(", "from. ./%1(")
-      line = gsub(line, ": " .. pattern .. "%)", ": ../%1)")
-      -- Deal with XeTeX specials
-      if match(line, "^%.+\\XeTeX.?.?.?file") then
-        line = gsub(line, pattern, "../%1")
-      end
-    end
-    -- Deal with the fact that "(.aux)" may have still a leading space
-    line = gsub(line, "^ %(%.aux%)", "(.aux)")
-    -- Merge all of .fd data into one line so will be removed later
-    if match(line, "^ *%([%.%/%w]+%.fd[^%)]*$") then
-      lastline = (lastline or "") .. line
-      return "", (lastline or "") .. line
-    end
-    -- TeX90/XeTeX knows only the smaller set of dimension units
-    line = gsub(
-      line,
-      "cm, mm, dd, cc, bp, or sp", "cm, mm, dd, cc, nd, nc, bp, or sp"
-    )
-    -- Normalise a case where fixing a TeX bug changes the message text
-    line = gsub(line, "\\csname\\endcsname ", "\\csname\\endcsname")
-    -- Zap "on line <num>" and replace with "on line ..."
-    -- Two similar cases, Lua patterns mean we need to do them separately
-    line = gsub(line, "on line %d*", "on line ...")
-    line = gsub(line, "on input line %d*", "on input line ...")
-    -- Tidy up to ^^ notation
-    for i = 0, 31 do
-      line = gsub(line, char(i), "^^" .. char(64 + i))
-    end
-    -- Normalise register allocation to hard-coded numbers
-    -- No regex, so use a pattern plus lookup approach
-    local register_types = {
-        attribute      = true,
-        box            = true,
-        bytecode       = true,
-        catcodetable   = true,
-        count          = true,
-        dimen          = true,
-        insert         = true,
-        language       = true,
-        luabytecode    = true,
-        luachunk       = true,
-        luafunction    = true,
-        marks          = true,
-        muskip         = true,
-        read           = true,
-        skip           = true,
-        toks           = true,
-        whatsit        = true,
-        write          = true,
-        XeTeXcharclass = true
-      } 
-    if register_types[match(line, "^\\[^%]]+=\\([a-z]+)%d+$")] then
-      line = gsub(line, "%d+$", "...")
-    end
-    -- Also deal with showing boxes
-    if match(line, "^> \\box%d+=$") or match(line, "^> \\box%d+=(void)$") then
-      line = gsub(line, "%d+=", "...=")
-    end
-    -- Remove 'normal' direction information on boxes with (u)pTeX
-    line = gsub(line, ",? yoko direction,?", "")
-    line = gsub(line, ",? yoko%(math%) direction,?", "")
-    -- Remove the \special line that in DVI mode keeps PDFs comparable
-    if match(line, "^%.*\\special%{pdf: docinfo << /Creator") then
-      return ""
-    end
-    -- Remove the \special line possibly present in DVI mode for paper size
-    if match(line, "^%.*\\special%{papersize") then
-      return ""
-    end
-    -- Remove ConTeXt stuff
-    if match(line, "^backend         >") or
-       match(line, "^close source    >") or
-       match(line, "^mkiv lua stats  >") or
-       match(line, "^pages           >") or
-       match(line, "^system          >") or
-       match(line, "^used file       >") or
-       match(line, "^used option     >") or
-       match(line, "^used structure  >") then
-       return ""
-    end
-    -- A tidy-up to keep LuaTeX and other engines in sync
-    line = gsub(line, utf8_char(127), "^^?")
-    -- Unicode engines display chars in the upper half of the 8-bit range:
-    -- tidy up to match pdfTeX if an ASCII engine is in use
-    if next(asciiengines) then
-      for i = 128, 255 do
-        line = gsub(line, utf8_char(i), "^^" .. format("%02x", i))
-      end
-    end
-    return line, lastline
-  end
-  local lastline = ""
-  local newlog = ""
-  local prestart = true
-  local skipping = false
-  -- Read the entire log file as a binary: deals with ^@/^[, etc.
-  local file = assert(open(logfile, "rb"))
-  local contents = gsub(file:read("*all") .. "\n", "\r\n", "\n")
-  close(file)
-  for line in gmatch(contents, "([^\n]*)\n") do
-    if line == "START-TEST-LOG" then
-      prestart = false
-    elseif line == "END-TEST-LOG" or
-      match(line, "^Here is how much of .?.?.?TeX\'s memory you used:") then
-      break
-    elseif line == "OMIT" then
-      skipping = true
-    elseif match(line, "^%)?TIMO$") then
-      skipping = false
-    elseif not prestart and not skipping then
-      line, lastline = normalize(line, lastline)
-      if not match(line, "^ *$") and not killcheck(line) then
-        newlog = newlog .. line .. os_newline
-      end
-    end
-  end
-  local newfile = open(newfile, "w")
-  output(newfile)
-  write(newlog)
-  if recordstatus then
-    write('***************\n')
-    for i = 1, checkruns do
-      write('Compilation ' .. i .. ' of test file completed with exit status ' .. errlevels[i] '\n')
-    end
-  end
-  close(newfile)
-end
-
--- Additional normalization for LuaTeX
-local function formatlualog(logfile, newfile)
-  local function normalize(line, lastline, dropping)
-    -- Find \discretionary or \whatsit lines:
-    -- These may come back later
-    if match(line, "^%.+\\discretionary$")                or
-       match(line, "^%.+\\discretionary %(penalty 50%)$") or
-       match(line, "^%.+\\discretionary50%|$")            or
-       match(line, "^%.+\\discretionary50%| replacing $") or
-       match(line, "^%.+\\whatsit$")                      then
-      return "", line
-    end
-    -- For \mathon, we always need this line but the next
-    -- may be affected
-    if match(line, "^%.+\\mathon$") then
-      return line, line
-    end
-    -- LuaTeX has a flexible output box
-    line = gsub(line,"\\box\\outputbox", "\\box255")
-    -- LuaTeX identifies spaceskip glue
-    line = gsub(line,"%(\\spaceskip%) ", " ")
-    -- Remove 'display' at end of display math boxes:
-    -- LuaTeX omits this as it includes direction in all cases
-    line = gsub(line, "(\\hbox%(.*), display$", "%1")
-    -- Remove 'normal' direction information on boxes:
-    -- any bidi/vertical stuff will still show
-    line = gsub(line, ", direction TLT", "")
-    -- Find glue setting and round out the last place
-    local function round_digits(l, m)
-      return gsub(
-        l,
-        m .. " (%-?)%d+%.%d+",
-        m .. " %1"
-          .. format(
-            "%.3f",
-            match(line, m .. " %-?(%d+%.%d+)") or 0
-          )
-      )
-    end
-    if match(line, "glue set %-?%d+%.%d+") then
-      line = round_digits(line, "glue set")
-    end
-    if match(
-        line, "glue %-?%d+%.%d+ plus %-?%d+%.%d+ minus %-?%d+%.%d+$"
-      )
-      then
-      line = round_digits(line, "glue")
-      line = round_digits(line, "plus")
-      line = round_digits(line, "minus")
-    end
-    -- LuaTeX writes ^^M as a new line, which we lose
-    line = gsub(line, "%^%^M", "")
-    -- Remove U+ notation in the "Missing character" message
-    line = gsub(
-        line,
-        "Missing character: There is no (%^%^..) %(U%+(....)%)",
-        "Missing character: There is no %1"
-      )
-    -- The first time a new font is used, it shows up
-    -- as being cached
-    line = gsub(line, "(save cache:", "(load cache:")
-    -- A function to handle the box prefix part
-    local function boxprefix(s)
-      return gsub(match(s, "^(%.+)"), "%.", "%%.")
-    end
-    -- 'Recover' some discretionary data
-    if match(lastline, "^%.+\\discretionary %(penalty 50%)$") and
-       match(line, boxprefix(lastline) .. "%.= ") then
-       return gsub(line, "%.= ", ""),""
-    end
-    -- Where the last line was a discretionary, looks for the
-    -- info one level in about what it represents
-    if match(lastline, "^%.+\\discretionary$")                or
-       match(lastline, "^%.+\\discretionary %(penalty 50%)$") or
-       match(lastline, "^%.+\\discretionary50%|$")            or
-       match(lastline, "^%.+\\discretionary50%| replacing $") then
-      local prefix = boxprefix(lastline)
-      if match(line, prefix .. "%.") or
-         match(line, prefix .. "%|") then
-         if match(lastline, " replacing $") and
-            not dropping then
-           -- Modify the return line
-           return gsub(line, "^%.", ""), lastline, true
-         else
-           return "", lastline, true
-         end
-      else
-        if dropping then
-          -- End of a \discretionary block
-          return line, ""
-        else
-          -- Not quite a normal discretionary
-          if match(lastline, "^%.+\\discretionary50%|$") then
-            lastline =  gsub(lastline, "50%|$", "")
-          end
-          -- Remove some info that TeX90 lacks
-          lastline = gsub(lastline, " %(penalty 50%)$", "")
-          -- A normal (TeX90) discretionary:
-          -- add with the line break reintroduced
-          return lastline .. os_newline .. line, ""
-        end
-      end
-    end
-    -- Look for another form of \discretionary, replacing a "-"
-    pattern = "^%.+\\discretionary replacing *$"
-    if match(line, pattern) then
-      return "", line
-    else
-      if match(lastline, pattern) then
-        local prefix = boxprefix(lastline)
-        if match(line, prefix .. "%.\\kern") then
-          return gsub(line, "^%.", ""), lastline, true
-        elseif dropping then
-          return "", ""
-        else
-          return lastline .. os_newline .. line, ""
-        end
-      end
-    end
-    -- For \mathon, if the current line is an empty \hbox then
-    -- drop it
-    if match(lastline, "^%.+\\mathon$") then
-      local prefix = boxprefix(lastline)
-      if match(line, prefix .. "\\hbox%(0%.0%+0%.0%)x0%.0$") then
-        return "", ""
-      end
-    end
-    -- Various \local... things that other engines do not do:
-    -- Only remove the no-op versions
-    if match(line, "^%.+\\localpar$")                or
-       match(line, "^%.+\\localinterlinepenalty=0$") or
-       match(line, "^%.+\\localbrokenpenalty=0$")    or
-       match(line, "^%.+\\localleftbox=null$")       or
-       match(line, "^%.+\\localrightbox=null$")      then
-       return "", ""
-    end
-    -- Older LuaTeX versions set the above up as a whatsit
-    -- (at some stage this can therefore go)
-    if match(lastline, "^%.+\\whatsit$") then
-      local prefix = boxprefix(lastline)
-      if match(line, prefix .. "%.") then
-        return "", lastline, true
-      else
-        -- End of a \whatsit block
-        return line, ""
-      end
-    end
-    -- Wrap some cases that can be picked out
-    -- In some places LuaTeX does use max_print_line, then we
-    -- get into issues with different wrapping approaches
-    if len(line) == maxprintline then
-      return "", lastline .. line
-    elseif len(lastline) == maxprintline then
-      if match(line, "\\ETC%.%}$") then
-        -- If the line wrapped at \ETC we might have lost a space
-        return lastline
-          .. ((match(line, "^\\ETC%.%}$") and " ") or "")
-          .. line, ""
-      elseif match(line, "^%}%}%}$") then
-        return lastline .. line, ""
-      else
-        return lastline .. os_newline .. line, ""
-      end
-    -- Return all of the text for a wrapped (multi)line
-    elseif len(lastline) > maxprintline then
-      return lastline .. line, ""
-    end
-    -- Remove spaces at the start of lines: deals with the fact that LuaTeX
-    -- uses a different number to the other engines
-    return gsub(line, "^%s+", ""), ""
-  end
-  local newlog = ""
-  local lastline = ""
-  local dropping = false
-  -- Read the entire log file as a binary: deals with ^@/^[, etc.
-  local file = assert(open(logfile, "rb"))
-  local contents = gsub(file:read("*all") .. "\n", "\r\n", "\n")
-  close(file)
-  for line in gmatch(contents, "([^\n]*)\n") do
-    line, lastline, dropping = normalize(line, lastline, dropping)
-    if not match(line, "^ *$") then
-      newlog = newlog .. line .. os_newline
-    end
-  end
-  local newfile = open(newfile, "w")
-  output(newfile)
-  write(newlog)
-  close(newfile)
-end
-
--- Look for files, directory by directory, and return the first existing
-function locate(dirs, names)
-  for _,i in ipairs(dirs) do
-    for _,j in ipairs(names) do
-      local path = i .. "/" .. j
-      if fileexists(path) then
-        return path
-      end
-    end
-  end
-end
-
--- List all modules
-function listmodules()
-  local modules = { }
-  local exclmodules = exclmodules or { }
-  for entry in lfs_dir(".") do
-    if entry ~= "." and entry ~= ".." then
-      local attr = lfs_attributes(entry)
-      assert(type(attr) == "table")
-      if attr.mode == "directory" then
-        if not exclmodules[entry] then
-          insert(modules, entry)
-        end
-      end
-    end
-  end
-  return modules
-end
-
-local function setepoch()
-  return
-    os_setenv .. " SOURCE_DATE_EPOCH=" .. epoch
-      .. os_concat ..
-    os_setenv .. " SOURCE_DATE_EPOCH_TEX_PRIMITIVES=1"
-      .. os_concat ..
-    os_setenv .. " FORCE_SOURCE_DATE=1"
-      .. os_concat
-end
-
--- Run one test which may have multiple engine-dependent comparisons
--- Should create a difference file for each failed test
-function runcheck(name, hide)
-  local checkengines = checkengines
-  if options["engine"] then
-    checkengines = options["engine"]
-  end
-  local errorlevel = 0
-  for _,i in ipairs(checkengines) do
-    -- Allow for luatex == luajittex for .tlg purposes
-    local engine = i
-    if i == "luajittex" then
-      engine = "luatex"
-    end
-    checkpdf = setup_check(name, engine)
-    runtest(name, i, hide, lvtext, checkpdf)
-    -- Generation of results depends on test type
-    local errlevel
-    if checkpdf then
-      errlevel = compare_pdf(name, engine)
-    else
-      errlevel = compare_tlg(name, engine)
-    end
-    if errlevel ~= 0 and options["halt-on-error"] then
-      showfaileddiff()
-      if errlevel ~= 0 then
-        return 1
-      end
-    end
-    if errlevel > errorlevel then
-      errorlevel = errlevel
-    end
-  end
-  return errorlevel
-end
-
-function setup_check(name, engine)
-  local testname = name .. "." .. engine
-  local pdffile = locate(
-    {testfiledir, unpackdir},
-    {testname .. pdfext, name .. pdfext}
-  )
-  local tlgfile = locate(
-    {testfiledir, unpackdir},
-    {testname .. tlgext, name .. tlgext}
-  )
-  -- Attempt to generate missing reference file from expectation
-  if not (pdffile or tlgfile) then
-    if not locate({unpackdir, testfiledir}, {name .. lveext}) then
-      print(
-        "Error: failed to find " .. pdfext .. ", " .. tlgext .. " or "
-          .. lveext .. " file for " .. name .. "!"
-      )
-      exit(1)
-    end
-    runtest(name, engine, true, lveext, true)
-    pdffile = testdir .. "/" .. testname .. pdfext
-    -- If a PDF is generated use it for comparisons
-    if not fileexists(pdffile) then
-      pdffile = nil
-      ren(testdir, testname .. logext, testname .. tlgext)
-    end
-  else
-    -- Install comparison files found
-    for _,v in pairs({pdffile, tlgfile}) do
-      if v then
-        cp(
-          match(v, ".*/(.*)"),
-          match(v, "(.*)/.*"),
-          testdir
-        )
-      end
-    end
-  end
-  if pdffile then
-    local pdffile = match(pdffile, ".*/(.*)")
-    ren(
-      testdir,
-      pdffile,
-      gsub(pdffile, pdfext .. "$", ".ref" .. pdfext)
-    )
-    return true
-  else
-    return false
-  end
-end
-
-function compare_pdf(name, engine)
-  local errorlevel
-  local testname = name .. "." .. engine
-  local cmpfile    = testdir .. "/" .. testname .. os_cmpext
-  local pdffile    = testdir .. "/" .. testname .. pdfext
-  local refpdffile = locate(
-    {testdir}, {testname .. ".ref" .. pdfext, name .. ".ref" .. pdfext}
-  )
-  if not refpdffile then
-    return
-  end
-  if os_type == "windows" then
-    refpdffile = unix_to_win(refpdffile)
-  end
-  errorlevel = execute(
-    os_cmpexe .. " " .. refpdffile .. " " .. pdffile .. " > " .. cmpfile
-  )
-  if errorlevel == 0 then
-    os_remove(cmpfile)
-  end
-  return errorlevel
-end
-
-function compare_tlg(name, engine)
-  local errorlevel
-  local testname = name .. "." .. engine
-  local difffile = testdir .. "/" .. testname .. os_diffext
-  local logfile  = testdir .. "/" .. testname .. logext
-  local tlgfile  = locate({testdir}, {testname .. tlgext, name .. tlgext})
-  if not tlgfile then
-    return
-  end
-  if os_type == "windows" then
-    tlgfile = unix_to_win(tlgfile)
-  end
-  -- Do additional log formatting if the engine is LuaTeX, there is no
-  -- LuaTeX-specific .tlg file and the default engine is not LuaTeX
-  if engine == "luatex"
-    and not match(tlgfile, "%.luatex" .. "%" .. tlgext)
-    and stdengine ~= "luatex"
-    and stdengine ~= "luajittex"
-    then
-    local luatlgfile = testdir .. "/" .. name .. ".luatex" ..  tlgext
-    if os_type == "windows" then
-      luatlgfile = unix_to_win(luatlgfile)
-    end
-    formatlualog(tlgfile, luatlgfile)
-    formatlualog(logfile, logfile)
-    -- This allows code sharing below: we only need the .tlg name in one place
-    tlgfile = luatlgfile
-  end
-  errorlevel = execute(
-    os_diffexe .. " " .. tlgfile .. " " .. logfile .. " > " .. difffile
-  )
-  if errorlevel == 0 then
-    os_remove(difffile)
-  end
-  return errorlevel
-end
-
--- Run one of the test files: doesn't check the result so suitable for
--- both creating and verifying .tlg files
-function runtest(name, engine, hide, ext, makepdf)
-  local lvtfile = name .. (ext or lvtext)
-  cp(lvtfile, fileexists(testfiledir .. "/" .. lvtfile)
-    and testfiledir or unpackdir, testdir)
-  local engine = engine or stdengine
-  -- Set up the format file name if it's one ending "...tex"
-  local realengine = engine
-  local format
-  if
-    match(checkformat, "tex$") and
-    not match(engine, checkformat) then
-    format = " -fmt=" .. gsub(engine, "(.*)tex$", "%1") .. checkformat
-  else
-    format = ""
-  end
-  -- Special casing for e-LaTeX format
-  if
-    match(checkformat, "^latex$") and
-    match(engine, "^etex$") then
-    format = " -fmt=latex"
-  end
-  -- Special casing for (u)pTeX LaTeX formats
-  if
-    match(checkformat, "^latex$") and
-    match(engine, "^u?ptex$") then
-    realengine = "e" .. engine
-  end
-  -- Special casing for XeTeX engine
-  local checkopts = checkopts
-  if match(engine, "xetex") and not makepdf then
-    checkopts = checkopts .. " -no-pdf"
-  end
-  -- Special casing for ConTeXt
-  if match(checkformat, "^context$") then
-    format = ""
-    if engine == "luatex" or engine == "luajittex" then
-      realengine = "context"
-    elseif engine == "pdftex" then
-      realengine = "texexec"
-    elseif engine == "xetex" then
-      realengine = "texexec --xetex"
-    else
-      print("Engine incompatible with format")
-      exit(1)
-    end
-  end
-  local logfile = testdir .. "/" .. name .. logext
-  local newfile = testdir .. "/" .. name .. "." .. engine .. logext
-  local asciiopt = ""
-  for _,i in ipairs(asciiengines) do
-    if realengine == i then
-      asciiopt = "-translate-file ./ascii.tcx "
-      break
-    end
-  end
-  local errlevels = {}
-  for i = 1, checkruns do
-    errlevels[i] = run(
-      testdir,
-      -- No use of localdir here as the files get copied to testdir:
-      -- avoids any paths in the logs
-      os_setenv .. " TEXINPUTS=." .. (checksearch and os_pathsep or "")
-        .. os_concat ..
-      -- Avoid spurious output from (u)pTeX
-      os_setenv .. " GUESS_INPUT_KANJI_ENCODING=0"
-        .. os_concat ..
-      (forcecheckepoch and setepoch() or "") ..
-      -- Ensure lines are of a known length
-      os_setenv .. " max_print_line=" .. maxprintline
-        .. os_concat ..
-      realengine ..  format .. " "
-        .. checkopts .. " " .. asciiopt .. lvtfile
-        .. (hide and (" > " .. os_null) or "")
-        .. os_concat ..
-      runtest_tasks(jobname(lvtfile))
-    )
-  end
-  if makepdf and fileexists(testdir .. "/" .. name .. dviext) then
-    dvitopdf(name, testdir, engine, hide)
-  end
-  formatlog(logfile, newfile, engine, errlevels)
-  -- Store secondary files for this engine
-  for _,i in ipairs(filelist(testdir, name .. ".???")) do
-    local ext = match(i, "%....")
-    if ext ~= lvtext and ext ~= tlgext and ext ~= lveext and ext ~= logext then
-      if not fileexists(testsuppdir .. "/" .. i) then
-        ren(
-          testdir, i, gsub(
-            i, gsub(name, "%-", "%%-"), name .. "." .. engine
-          )
-        )
-      end
-    end
-  end
-end
-
--- A hook to allow additional tasks to run for the tests
-runtest_tasks = runtest_tasks or function(name)
-  return ""
-end
-
-function dvitopdf(name, dir, engine, hide)
-  if match(engine, "^u?ptex$") then
-    run(
-      dir,
-      (forcecheckepoch and setepoch() or "") ..
-     "dvipdfmx  " .. name .. dviext
-       .. (hide and (" > " .. os_null) or "")
-    )
-  else
-    run(
-      dir,
-      (forcecheckepoch and setepoch() or "") ..
-     "dvips " .. name .. dviext
-       .. (hide and (" > " .. os_null) or "")
-       .. os_concat ..
-     "ps2pdf " .. name .. psext
-        .. (hide and (" > " .. os_null) or "")
-    )
-  end
-end
-
--- Split a path into file and directory component
-function splitpath(file)
-  local path, name = match(file, "^(.*)/([^/]*)$")
-  if path then
-    return path, name
-  else
-    return ".", file
-  end
-end
-
--- Arguably clearer names
-function basename(file)
-  return(select(2, splitpath(file)))
-end
-
-function dirname(file)
-  return(select(1, splitpath(file)))
-end
-
--- Strip the extension from a file name (if present)
-function jobname(file)
-  local name = match(basename(file), "^(.*)%.")
-  return name or file
-end
-
--- Look for a test: could be in the testfiledir or the unpackdir
-function testexists(test)
-  return(locate({testfiledir, unpackdir}, {test .. lvtext}))
-end
-
---
--- Auxiliary functions for typesetting: need to be generally available
---
-
--- An auxiliary used to set up the environmental variables
-function runtool(subdir, dir, envvar, command)
-  dir = dir or "."
-  return(
-    run(
-      typesetdir .. "/" .. subdir,
-      (forcedocepoch and setepoch() or "") ..
-      os_setenv .. " " .. envvar .. "=." .. os_pathsep
-        .. abspath(localdir) .. os_pathsep
-        .. abspath(dir .. "/" .. subdir)
-        .. (typesetsearch and os_pathsep or "")
-        .. os_concat ..
-      command
-    )
-  )
-end
-
-function biber(name, dir)
-  if fileexists(typesetdir .. "/" .. name .. ".bcf") then
-    local path, name = splitpath(name)
-    return(
-      runtool(path, dir, "BIBINPUTS",  biberexe .. " " .. biberopts .. " " .. name)
-    )
-  end
-  return 0
-end
-
-function bibtex(name, dir)
-  if fileexists(typesetdir .. "/" .. name .. ".aux") then
-    -- LaTeX always generates an .aux file, so there is a need to
-    -- look inside it for a \citation line
-    local grep
-    if os_type == "windows" then
-      grep = "\\\\"
-    else
-     grep = "\\\\\\\\"
-    end
-    local path, name = splitpath(name)
-    if run(
-        typesetdir,
-        os_grepexe .. " \"^" .. grep .. "citation{\" " .. name .. ".aux > "
-          .. os_null
-      ) + run(
-        typesetdir,
-        os_grepexe .. " \"^" .. grep .. "bibdata{\" " .. name .. ".aux > "
-          .. os_null
-      ) == 0 then
-      return(
-        -- Cheat slightly as we need to set two variables
-        runtool(
-          path, dir,
-          "BIBINPUTS",
-          os_setenv .. " BSTINPUTS=." .. os_pathsep
-            .. abspath(localdir)
-            .. (typesetsearch and os_pathsep or "") ..
-          os_concat ..
-          bibtexexe .. " " .. bibtexopts .. " " .. name
-        )
-      )
-    end
-  end
-  return 0
-end
-
-function makeindex(name, dir, inext, outext, logext, style)
-  if fileexists(typesetdir .. "/" .. name .. inext) then
-    local path, name = splitpath(name)
-    return(
-      runtool(
-        path, dir,
-        "INDEXSTYLE",
-        makeindexexe .. " " .. makeindexopts .. " "
-          .. " -s " .. style .. " -o " .. name .. outext
-          .. " -t " .. name .. " "  .. name .. inext
-      )
-    )
-  end
-  return 0
-end
-
-function tex(file, dir)
-  local path, name = splitpath(file)
-  return(
-    runtool(
-      path, dir,
-      "TEXINPUTS",
-      typesetexe .. " " .. typesetopts .. " \"" .. typesetcmds
-        .. "\\input " .. name .. "\""
-    )
-  )
-end
-
-function typesetpdf(file, dir)
-  local name = gsub(file, "%.[^.]+$", "")
-  print("Typesetting " .. name)
-  local errorlevel = typeset(file, dir)
-  if errorlevel == 0 then
-    name = name .. ".pdf"
-    os_remove(jobname(name))
-    cp(name, typesetdir, docfiledir)
-  else
-    print(" ! Compilation failed")
-  end
-  return errorlevel
-end
-
-typeset = typeset or function(file, dir)
-  dir = dir or "."
-  local errorlevel = tex(file, dir)
-  if errorlevel ~= 0 then
-    return errorlevel
-  else
-    local name = jobname(file)
-    errorlevel = biber(name, dir) + bibtex(name, dir)
-    if errorlevel == 0 then
-      local function cycle(name, dir)
-        return(
-          makeindex(name, dir, ".glo", ".gls", ".glg", glossarystyle) +
-          makeindex(name, dir, ".idx", ".ind", ".ilg", indexstyle)    +
-          tex(file, dir)
-        )
-      end
-      for i = 1, typesetruns do
-        errorlevel = cycle(name, dir)
-        if errorlevel ~= 0 then break end
-      end
-    end
-    return errorlevel
-  end
-end
-
--- Standard versions of the main targets for building modules
-
--- Simply print out how to use the build system
-function help()
-  print("usage: " .. arg[0] .. " <command> [<options>] [<names>]")
-  print("")
-  print("The most commonly used l3build commands are:")
-  if testfiledir ~= "" then
-    print("   check      Run all automated tests")
-  end
-  print("   clean      Clean out directory tree")
-  if next(cmdchkfiles) ~= nil then
-    print("   cmdcheck   Check commands documented are defined")
-  end
-  if module == "" or bundle == "" then
-    print("   ctan       Create CTAN-ready archive")
-  end
-  print("   doc        Typesets all documentation files")
-  print("   install    Installs files into the local texmf tree")
-  if module ~= "" and testfiledir ~= "" then
-    print("   save       Saves test validation log")
-  end
-  print("   setversion Update version information in sources")
-  print("")
-  print("Valid options are:")
-  local longest = 0
-  for k,v in pairs(option_list) do
-    if len(k) > longest then
-      longest = len(k)
-    end
-  end
-  -- Sort the options
-  local t = { }
-  for k,_ in pairs(option_list) do
-    insert(t, k)
-  end
-  sort(t)
-  for _,k in ipairs(t) do
-    local opt = option_list[k]
-    local filler = rep(" ", longest - len(k))
-    if opt["desc"] then -- Skip --help as it has no desc
-      print(
-        "   --" .. k .. "|-" .. opt["short"] .. filler .. opt["desc"]
-      )
-    end
-  end
-  print("")
-  print("See l3build.pdf for further details.")
-end
-
-function check(names)
-  local errorlevel = 0
-  if testfiledir ~= "" and direxists(testfiledir) then
-    if not options["rerun"] then
-      checkinit()
-    end
-    local hide = true
-    if names and next(names) then
-      hide = false
-    end
-    names = names or { }
-    -- No names passed: find all test files
-    if not next(names) then
-      for _,i in pairs(filelist(testfiledir, "*" .. lvtext)) do
-        insert(names, jobname(i))
-      end
-      for _,i in ipairs(filelist(unpackdir, "*" .. lvtext)) do
-        if fileexists(testfiledir .. "/" .. i) then
-          print("Duplicate test file: " .. i)
-          return 1
-        else
-          insert(names, jobname(i))
-        end
-      end
-    end
-    -- Actually run the tests
-    print("Running checks on")
-    for _,name in ipairs(names) do
-      print("  " .. name)
-      local errlevel = runcheck(name, hide)
-      -- Return value must be 1 not errlevel
-      if errlevel ~= 0 then
-        if options["halt-on-error"] then
-          return 1
-        else
-          errorlevel = 1
-          -- visually show that something has failed
-          print("          --> failed\n")
-        end
-      end
-    end
-    if errorlevel ~= 0 then
-      checkdiff()
-    else
-      print("\n  All checks passed\n")
-    end
-  end
-  return errorlevel
-end
-
--- A short auxiliary to print the list of differences for check
-function checkdiff()
-  print("\n  Check failed with difference files")
-  for _,i in ipairs(filelist(testdir, "*" .. os_diffext)) do
-    print("  - " .. testdir .. "/" .. i)
-  end
-  for _,i in ipairs(filelist(testdir, "*" .. os_cmpext)) do
-    print("  - " .. testdir .. "/" .. i)
-  end
-  print("")
-end
-
-function showfaileddiff()
-  print("\nCheck failed with difference file")
-  for _,i in ipairs(filelist(testdir, "*" .. os_diffext)) do
-    print("  - " .. testdir .. "/" .. i)
-    print("")
-    local f = open(testdir .. "/" .. i,"r")
-    local content = f:read("*all")
-    f:close()
-    print("-----------------------------------------------------------------------------------")
-    print(content)
-    print("-----------------------------------------------------------------------------------")
-  end
-  for _,i in ipairs(filelist(testdir, "*" .. os_cmpext)) do
-    print("  - " .. testdir .. "/" .. i)
-  end
-end
-
--- Remove all generated files
-function clean()
-  -- To make sure that distribdir never contains any stray subdirs,
-  -- it is entirely removed then recreated rather than simply deleting
-  -- all of the files
-  local errorlevel =
-    rmdir(distribdir)    +
-    mkdir(distribdir)    +
-    cleandir(localdir)   +
-    cleandir(testdir)    +
-    cleandir(typesetdir) +
-    cleandir(unpackdir)
-  for _,i in ipairs(cleanfiles) do
-    for _,dir in pairs({maindir, sourcefiledir, docfiledir}) do
-      errorlevel = rm(dir, i) + errorlevel
-    end
-  end
-  return errorlevel
-end
-
-function bundleclean()
-  local errorlevel = call(modules, "clean")
-  for _,i in ipairs(cleanfiles) do
-    errorlevel = rm(maindir, i) + errorlevel
-  end
-  return (
-    errorlevel     +
-    rmdir(ctandir) +
-    rmdir(tdsdir)
-  )
-end
-
--- Check commands are defined
-function cmdcheck()
-  mkdir(localdir)
-  cleandir(testdir)
-  depinstall(checkdeps)
-  for _,filetype in pairs(
-      {bibfiles, docfiles, typesetfiles, typesetdemofiles}
-    ) do
-    for _,file in pairs(filetype) do
-      cp(file, docfiledir, typesetdir)
-    end
-  end
-  for _,file in pairs(sourcefiles) do
-    cp(file, sourcefiledir, testdir)
-  end
-  for _,file in pairs(typesetsuppfiles) do
-    cp(file, supportdir, testdir)
-  end
-  local engine = gsub(stdengine, "tex$", "latex")
-  local localdir = abspath(localdir)
-  print("Checking source files")
-  for _,i in ipairs(cmdchkfiles) do
-    for _,j in ipairs(filelist(sourcefiledir, i)) do
-      print("  " .. jobname(j))
-      run(
-        testdir,
-        os_setenv .. " TEXINPUTS=." .. os_pathsep .. localdir
-          .. os_pathsep ..
-        os_concat ..
-        engine .. " " .. cmdchkopts ..
-          " \"\\PassOptionsToClass{check}{l3doc} \\input " .. j .. "\""
-          .. " > " .. os_null
-      )
-      for line in lines(testdir .. "/" .. jobname(j) .. ".cmds") do
-        if match(line, "^%!") then
-          print("   - " .. match(line, "^%! (.*)"))
-        end
-      end
-    end
-  end
-end
-
-function ctan(standalone)
-  -- Always run tests for all engines
-  options["engine"] = nil
-  local function dirzip(dir, name)
-    local zipname = name .. ".zip"
-    local function tab_to_str(table)
-      local string = ""
-      for _,i in ipairs(table) do
-        string = string .. " " .. "\"" .. i .. "\""
-      end
-      return string
-    end
-    -- Convert the tables of files to quoted strings
-    local binfiles = tab_to_str(binaryfiles)
-    local exclude = tab_to_str(excludefiles)
-    -- First, zip up all of the text files
-    run(
-      dir,
-      zipexe .. " " .. zipopts .. " -ll ".. zipname .. " " .. "."
-        .. (
-          (binfiles or exclude) and (" -x" .. binfiles .. " " .. exclude)
-          or ""
-        )
-    )
-    -- Then add the binary ones
-    run(
-      dir,
-      zipexe .. " " .. zipopts .. " -g ".. zipname .. " " .. ". -i" ..
-        binfiles .. (exclude and (" -x" .. exclude) or "")
-    )
-  end
-  local errorlevel
-  if standalone then
-    errorlevel = check()
-    bundle = module
-  else
-    errorlevel = call(modules, "bundlecheck")
-  end
-  if errorlevel == 0 then
-    rmdir(ctandir)
-    mkdir(ctandir .. "/" .. ctanpkg)
-    rmdir(tdsdir)
-    mkdir(tdsdir)
-    if standalone then
-      errorlevel = bundlectan()
-    else
-      errorlevel = call(modules, "bundlectan")
-    end
-  else
-    print("\n====================")
-    print("Tests failed, zip stage skipped!")
-    print("====================\n")
-    return errorlevel
-  end
-  if errorlevel == 0 then
-    for _,i in ipairs(textfiles) do
-      for _,j in pairs({unpackdir, currentdir}) do
-        cp(i, j, ctandir .. "/" .. ctanpkg)
-        cp(i, j, tdsdir .. "/doc/" .. tdsroot .. "/" .. bundle)
-      end
-    end
-    dirzip(tdsdir, ctanpkg .. ".tds")
-    if packtdszip then
-      cp(ctanpkg .. ".tds.zip", tdsdir, ctandir)
-    end
-    dirzip(ctandir, ctanpkg)
-    cp(ctanpkg .. ".zip", ctandir, currentdir)
-  else
-    print("\n====================")
-    print("Typesetting failed, zip stage skipped!")
-    print("====================\n")
-  end
-  return errorlevel
-end
-
-function bundlectan()
-  -- Generate a list of individual file names excluding those in the second
-  -- argument: the latter is a table
-  local function excludelist(include, exclude, dir)
-    local include = include or { }
-    local exclude = exclude or { }
-    local dir = dir or currentdir
-    local includelist = { }
-    local excludelist = { }
-    for _,i in ipairs(exclude) do
-      for _,j in ipairs(i) do
-        for file,_ in pairs(tree(dir, j)) do
-          excludelist[file] = true
-        end
-      end
-    end
-    for _,i in ipairs(include) do
-      for file,_ in pairs(tree(dir, i)) do
-        if not excludelist[file] then
-          insert(includelist, file)
-        end
-      end
-    end
-    return includelist
-  end
-  unpack()
-  local errorlevel = doc()
-  if errorlevel == 0 then
-    -- Work out what PDF files are available
-    pdffiles = { }
-    for _,i in ipairs(typesetfiles) do
-      insert(pdffiles, (gsub(i, "%.%w+$", ".pdf")))
-    end
-    -- For the purposes here, any typesetting demo files need to be
-    -- part of the main typesetting list
-    local typesetfiles = typesetfiles
-    for _,v in pairs(typesetdemofiles) do
-      insert(typesetfiles, v)
-    end
-    typesetlist = excludelist(typesetfiles, {sourcefiles}, docfiledir)
-    sourcelist = excludelist(
-      sourcefiles, {bstfiles, installfiles, makeindexfiles}, sourcefiledir
-    )
-    copyctan()
-    copytds()
-  end
-  return errorlevel
-end
-
--- A hook to allow additional typesetting of demos
-typeset_demo_tasks = typeset_demo_tasks or function()
-  return 0
-end
-
--- Typeset all required documents
--- Uses a set of dedicated auxiliaries that need to be available to others
-function doc(files)
-  -- Set up
-  cleandir(typesetdir)
-  for _,filetype in pairs( 
-      {bibfiles, docfiles, typesetfiles, typesetdemofiles} 
-    ) do 
-    for _,file in pairs(filetype) do 
-      cp(file, docfiledir, typesetdir) 
-    end 
-  end 
-  for _,file in pairs(sourcefiles) do 
-    cp(file, sourcefiledir, typesetdir) 
-  end 
-  for _,file in pairs(typesetsuppfiles) do
-    cp(file, supportdir, typesetdir)
-  end
-  depinstall(typesetdeps)
-  unpack({sourcefiles, typesetsourcefiles}, {sourcefiledir, docfiledir})
-  -- Main loop for doc creation
-  local done = {}
-  local errorlevel = typeset_demo_tasks()
-  if errorlevel ~= 0 then
-    return errorlevel
-  end
-  for _, typesetfiles in ipairs({typesetdemofiles, typesetfiles}) do
-    for _,i in ipairs(typesetfiles) do
-      for _, dir in ipairs({unpackdir, typesetdir}) do
-        for j,_ in pairs(tree(dir, i)) do
-          if not done[j] then
-            j = gsub(j, "^%./", "")
-            -- Allow for command line selection of files
-            local typeset = true
-            if files and next(files) then
-              typeset = false
-              for _,k in ipairs(files) do
-                if k == gsub(j, "%.[^.]+$", "") then
-                  typeset = true
-                  break
-                end
-              end
-            end
-            if typeset then
-              local errorlevel = typesetpdf(j, dir)
-              if errorlevel ~= 0 then
-                return errorlevel
-              else
-                done[j] = true
-              end
-            end
-          end
-        end
-      end
-    end
-  end
-  return 0
-end
-
--- Locally install files: only deals with those extracted, not docs etc.
-function install()
-  local errorlevel = unpack()
-  if errorlevel ~= 0 then
-    return errorlevel
-  end
-  set_program_name("latex")
-  local texmfhome = var_value("TEXMFHOME")
-  local installdir = texmfhome .. "/tex/" .. moduledir
-  errorlevel = cleandir(installdir)
-  if errorlevel ~= 0 then
-    return errorlevel
-  end
-  for _,i in ipairs(installfiles) do
-    errorlevel = cp(i, unpackdir, installdir)
-    if errorlevel ~= 0 then
-      return errorlevel
-    end
-  end
-  return 0
-end
-
-function save(names)
-  checkinit()
-  local engines = options["engine"] or {stdengine}
-  for _,name in pairs(names) do
-    local engine
-    for _,engine in pairs(engines) do
-      local tlgengine = ((engine == stdengine and "") or "." .. engine)
-      local tlgfile  = name .. tlgengine .. tlgext
-      local spdffile = name .. tlgengine .. pdfext
-      local newfile  = name .. "." .. engine .. logext
-      local pdffile  = name .. "." .. engine .. pdfext
-      local refext = ((options["pdf"] and pdfext) or tlgext)
-      if testexists(name) then
-        print("Creating and copying " .. refext)
-        runtest(name, engine, false, lvtext, options["pdf"])
-        if options["pdf"] then
-          ren(testdir, pdffile, spdffile)
-          cp(spdffile, testdir, testfiledir)
-        else
-          ren(testdir, newfile, tlgfile)
-          cp(tlgfile, testdir, testfiledir)
-        end
-        if fileexists(unpackdir .. "/" .. tlgfile) then
-          print(
-            "Saved " .. tlgext
-              .. " file overrides unpacked version of the same name"
-          )
-        end
-      elseif locate({unpackdir, testfiledir}, {name .. lveext}) then
-        print(
-          "Saved " .. tlgext .. " file overrides a "
-            .. lveext .. " file of the same name"
-        )
-      else
-        print(
-          "Test input \"" .. testfiledir .. "/" .. name .. lvtext
-            .. "\" not found"
-        )
-      end
-    end
-  end
-end
-
--- Provide some standard search-and-replace functions
-if versionform ~= "" and not setversion_update_line then
-  if versionform == "ProvidesPackage" then
-    function setversion_update_line(line, date, version)
-      -- No real regex so do it one type at a time
-      for _,i in pairs({"Class", "File", "Package"}) do
-        if match(
-          line,
-          "^\\Provides" .. i .. "{[a-zA-Z0-9%-%.]+}%[[^%]]*%]$"
-        ) then
-          line = gsub(line, "%[%d%d%d%d/%d%d/%d%d", "["
-            .. gsub(date, "%-", "/"))
-          line = gsub(
-            line, "(%[%d%d%d%d/%d%d/%d%d) [^ ]*", "%1 " .. version
-          )
-          break
-        end
-      end
-      return line
-    end
-  elseif versionform == "ProvidesExplPackage" then
-    function setversion_update_line(line, date, version)
-      -- No real regex so do it one type at a time
-      for _,i in pairs({"Class", "File", "Package"}) do
-        if match(
-          line,
-          "^\\ProvidesExpl" .. i .. " *{[a-zA-Z0-9%-%.]+}"
-        ) then
-          line = gsub(
-            line,
-            "{%d%d%d%d/%d%d/%d%d}( *){[^}]*}",
-            "{" .. gsub(date, "%-", "/") .. "}%1{" .. version .. "}"
-          )
-          break
-        end
-      end
-      return line
-    end
-  elseif versionform == "filename" then
-    function setversion_update_line(line, date, version)
-      if match(line, "^\\def\\filedate{%d%d%d%d/%d%d/%d%d}$") then
-        line = "\\def\\filedate{" .. gsub(date, "%-", "/") .. "}"
-      end
-      if match(line, "^\\def\\fileversion{[^}]+}$") then
-        line = "\\def\\fileversion{" .. version .. "}"
-      end
-      return line
-    end
-  elseif versionform == "ExplFileDate" then
-    function setversion_update_line(line, date, version)
-      if match(line, "^\\def\\ExplFileDate{%d%d%d%d/%d%d/%d%d}$") then
-        line = "\\def\\ExplFileDate{" .. gsub(date, "%-", "/") .. "}"
-      end
-      if match(line, "^\\def\\ExplFileVersion{[^}]+}$") then
-        line = "\\def\\ExplFileVersion{" .. version .. "}"
-      end
-      return line
-    end
-  end
-end
-
--- Used to actually carry out search-and-replace
-setversion_update_line = setversion_update_line or function(line, date, version)
-  return line
-end
-
-function setversion()
-  local function rewrite(dir, file, date, version)
-    local changed = false
-    local result = ""
-    for line in lines(dir .. "/" .. file) do
-      local newline = setversion_update_line(line, date, version)
-      if newline ~= line then
-        line = newline
-        changed = true
-      end
-      result = result .. line .. os_newline
-    end
-    if changed then
-      -- Avoid adding/removing end-of-file newline
-      local f = open(dir .. "/" .. file, "rb")
-      local content = f:read("*all")
-      close(f)
-      if not match(content, os_newline .. "$") then
-        gsub(result, os_newline .. "$", "")
-      end
-      -- Write the new file
-      ren(dir, file, file .. bakext)
-      local f = open(dir .. "/" .. file, "w")
-      output(f)
-      write(result)
-      close(f)
-      rm(dir, file .. bakext)
-    end
-  end
-  local date = options["date"] or os_date("%Y-%m-%d")
-  local version = options["version"] or -1
-  for _,dir in pairs({currentdir, sourcefiledir, docfiledir}) do
-    for _,i in pairs(versionfiles) do
-      for file,_ in pairs(tree(dir, i)) do
-        rewrite(dir, file, date, version)
-      end
-    end
-  end
-  return 0
-end
-
--- Unpack the package files using an 'isolated' system: this requires
--- a copy of the 'basic' DocStrip program, which is used then removed
-function unpack(sources, sourcedirs)
-  local errorlevel = depinstall(unpackdeps)
-  if errorlevel ~= 0 then
-    return errorlevel
-  end
-  errorlevel = bundleunpack(sourcedirs, sources)
-  if errorlevel ~= 0 then
-    return errorlevel
-  end
-  for _,i in ipairs(installfiles) do
-    errorlevel = cp(i, unpackdir, localdir)
-    if errorlevel ~= 0 then
-      return errorlevel
-    end
-  end
-  return 0
-end
-
--- Split off from the main unpack so it can be used on a bundle and not
--- leave only one modules files
-bundleunpack = bundleunpack or function(sourcedirs, sources)
-  local errorlevel = mkdir(localdir)
-  if errorlevel ~=0 then
-    return errorlevel
-  end
-  errorlevel = cleandir(unpackdir)
-  if errorlevel ~=0 then
-    return errorlevel
-  end
-  for _,i in ipairs(sourcedirs or {sourcefiledir}) do
-    for _,j in ipairs(sources or {sourcefiles}) do
-      for _,k in ipairs(j) do
-        errorlevel = cp(k, i, unpackdir)
-        if errorlevel ~=0 then
-          return errorlevel
-        end
-      end
-    end
-  end
-  for _,i in ipairs(unpacksuppfiles) do
-    errorlevel = cp(i, supportdir, localdir)
-    if errorlevel ~=0 then
-      return errorlevel
-    end
-  end
-  for _,i in ipairs(unpackfiles) do
-    for j,_ in pairs(tree(unpackdir, i)) do
-      -- This 'yes' business is needed to pass a series of "y\n" to
-      -- TeX if \askforoverwrite is true
-      -- That is all done using a file as it's the only way on Windows and
-      -- on Unix the "yes" command can't be used inside execute (it never
-      -- stops, which confuses Lua)
-      execute(os_yes .. ">>" .. localdir .. "/yes")
-      local path, name = splitpath(j)
-      local localdir = abspath(localdir)
-      errorlevel = run(
-        unpackdir .. "/" .. path,
-        os_setenv .. " TEXINPUTS=." .. os_pathsep
-          .. localdir .. (unpacksearch and os_pathsep or "") ..
-        os_concat ..
-        unpackexe .. " " .. unpackopts .. " " .. name .. " < "
-          .. localdir .. "/yes"
-          .. (options["quiet"] and (" > " .. os_null) or "")
-      )
-      if errorlevel ~=0 then
-        return errorlevel
-      end
-    end
-  end
-  return 0
-end
-
-function version()
-  print(
-    "\n" ..
-    "l3build: A testing and building system for LaTeX\n\n" ..
-    "Release " .. release_date
-  )
-end
-
---
--- The overall main function
---
-
-function stdmain(target, files)
-  local errorlevel
-  -- If the module name is empty, the script is running in a bundle:
-  -- apart from ctan all of the targets are then just mappings
-  if module == "" then
-    -- Detect all of the modules
-    modules = modules or listmodules()
-    if target == "doc" then
-      errorlevel = call(modules, "doc")
-    elseif target == "check" then
-      errorlevel = call(modules, "bundlecheck")
-      if errorlevel ~=0 then
-        print("There were errors: checks halted!\n")
-      end
-    elseif target == "clean" then
-      errorlevel = bundleclean()
-    elseif target == "cmdcheck" and next(cmdchkfiles) ~= nil then
-      errorlevel = call(modules, "cmdcheck")
-    elseif target == "ctan" then
-      errorlevel = ctan()
-    elseif target == "install" then
-      errorlevel = call(modules, "install")
-    elseif target == "setversion" then
-      errorlevel = call(modules, "setversion")
-      -- Deal with any files in the bundle dir itself
-      if errorlevel == 0 then
-        errorlevel = setversion()
-      end
-    elseif target == "unpack" then
-      errorlevel = call(modules, "bundleunpack")
-    elseif target == "version" then
-      version()
-    else
-      help()
-    end
-  else
-    if target == "bundleunpack" then -- 'Hidden' as only needed 'higher up'
-      depinstall(unpackdeps)
-      errorlevel = bundleunpack()
-    elseif target == "bundlecheck" then
-      errorlevel = check()
-    elseif target == "bundlectan" then
-      errorlevel = bundlectan()
-    elseif target == "doc" then
-      errorlevel = doc(files)
-    elseif target == "check" then
-      errorlevel = check(files)
-    elseif target == "clean" then
-      errorlevel = clean()
-    elseif target == "cmdcheck" and next(cmdchkfiles) ~= nil then
-      errorlevel = cmdcheck()
-    elseif target == "ctan" and bundle == "" then  -- Stand-alone module
-      errorlevel = ctan(true)
-    elseif target == "install" then
-      errorlevel = install()
-    elseif target == "save" then
-      if next(files) then
-        errorlevel = save(files)
-      else
-        help()
-      end
-    elseif target == "setversion" then
-      errorlevel = setversion()
-    elseif target == "unpack" then
-      errorlevel = unpack()
-    elseif target == "version" then
-      version()
-    else
-      help()
-    end
-  end
-  if errorlevel ~= 0 then
-    exit(1)
-  else
-    exit(0)
-  end
-end
+-- l3build setup and functions
+
+kpse.set_program_name("kpsewhich")
+build_kpse_path = string.match(kpse.lookup("l3build.lua"),"(.*[/])")
+local function build_require(s)
+  require( kpse.lookup("l3build-"..s..".lua", { path = build_kpse_path } ) )
+end
+
+build_require("variables")
+build_require("arguments")
+build_require("file-functions")
+build_require("typesetting")
+build_require("aux")
+build_require("clean")
+build_require("check")
+build_require("ctan")
+build_require("install")
+build_require("unpack")
+build_require("manifest")
+build_require("manifest-setup")
+build_require("setversion")
+build_require("help")
+build_require("stdmain")
 
 -- Allow main function to be disabled 'higher up'
 main = main or stdmain