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if not modules then modules = { } end modules ['luat-env'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- A former version provided functionality for non embeded core
-- scripts i.e. runtime library loading. Given the amount of
-- Lua code we use now, this no longer makes sense. Much of this
-- evolved before bytecode arrays were available and so a lot of
-- code has disappeared already.
local trace_locating = false trackers.register("resolvers.locating", function(v) trace_locating = v end)
local report_lua = logs.reporter("resolvers","lua")
local allocate, mark = utilities.storage.allocate, utilities.storage.mark
local format, sub, match, gsub, find = string.format, string.sub, string.match, string.gsub, string.find
local unquoted, quoted = string.unquoted, string.quoted
local concat = table.concat
-- precautions
os.setlocale(nil,nil) -- useless feature and even dangerous in luatex
function os.setlocale()
-- no way you can mess with it
end
-- dirty tricks
if arg and (arg[0] == 'luatex' or arg[0] == 'luatex.exe') and arg[1] == "--luaonly" then
arg[-1] = arg[0]
arg[ 0] = arg[2]
for k=3,#arg do
arg[k-2] = arg[k]
end
arg[#arg] = nil -- last
arg[#arg] = nil -- pre-last
end
-- environment
environment = environment or { }
local environment = environment
environment.arguments = allocate()
environment.files = allocate()
environment.sortedflags = nil
local mt = {
__index = function(_,k)
if k == "version" then
local version = tex.toks and tex.toks.contextversiontoks
if version and version ~= "" then
rawset(environment,"version",version)
return version
else
return "unknown"
end
elseif k == "jobname" or k == "formatname" then
local name = tex and tex[k]
if name or name== "" then
rawset(environment,k,name)
return name
else
return "unknown"
end
elseif k == "outputfilename" then
local name = environment.jobname
rawset(environment,k,name)
return name
end
end
}
setmetatable(environment,mt)
function environment.initializearguments(arg)
local arguments, files = { }, { }
environment.arguments, environment.files, environment.sortedflags = arguments, files, nil
for index=1,#arg do
local argument = arg[index]
if index > 0 then
local flag, value = match(argument,"^%-+(.-)=(.-)$")
if flag then
arguments[flag] = unquoted(value or "")
else
flag = match(argument,"^%-+(.+)")
if flag then
arguments[flag] = true
else
files[#files+1] = argument
end
end
end
end
environment.ownname = environment.ownname or arg[0] or 'unknown.lua'
end
function environment.setargument(name,value)
environment.arguments[name] = value
end
-- todo: defaults, better checks e.g on type (boolean versus string)
--
-- tricky: too many hits when we support partials unless we add
-- a registration of arguments so from now on we have 'partial'
function environment.argument(name,partial)
local arguments, sortedflags = environment.arguments, environment.sortedflags
if arguments[name] then
return arguments[name]
elseif partial then
if not sortedflags then
sortedflags = allocate(table.sortedkeys(arguments))
for k=1,#sortedflags do
sortedflags[k] = "^" .. sortedflags[k]
end
environment.sortedflags = sortedflags
end
-- example of potential clash: ^mode ^modefile
for k=1,#sortedflags do
local v = sortedflags[k]
if find(name,v) then
return arguments[sub(v,2,#v)]
end
end
end
return nil
end
function environment.splitarguments(separator) -- rather special, cut-off before separator
local done, before, after = false, { }, { }
local originalarguments = environment.originalarguments
for k=1,#originalarguments do
local v = originalarguments[k]
if not done and v == separator then
done = true
elseif done then
after[#after+1] = v
else
before[#before+1] = v
end
end
return before, after
end
function environment.reconstructcommandline(arg,noquote)
arg = arg or environment.originalarguments
if noquote and #arg == 1 then
-- we could just do: return unquoted(resolvers.resolve(arg[i]))
local a = arg[1]
a = resolvers.resolve(a)
a = unquoted(a)
return a
elseif #arg > 0 then
local result = { }
for i=1,#arg do
-- we could just do: result[#result+1] = format("%q",unquoted(resolvers.resolve(arg[i])))
local a = arg[i]
a = resolvers.resolve(a)
a = unquoted(a)
a = gsub(a,'"','\\"') -- tricky
if find(a," ") then
result[#result+1] = quoted(a)
else
result[#result+1] = a
end
end
return concat(result," ")
else
return ""
end
end
--~ -- to be tested:
--~
--~ function environment.reconstructcommandline(arg,noquote)
--~ arg = arg or environment.originalarguments
--~ if noquote and #arg == 1 then
--~ return unquoted(resolvers.resolve(arg[1]))
--~ elseif #arg > 0 then
--~ local result = { }
--~ for i=1,#arg do
--~ result[#result+1] = format("%q",unquoted(resolvers.resolve(arg[i]))) -- always quote
--~ end
--~ return concat(result," ")
--~ else
--~ return ""
--~ end
--~ end
if arg then
-- new, reconstruct quoted snippets (maybe better just remove the " then and add them later)
local newarg, instring = { }, false
for index=1,#arg do
local argument = arg[index]
if find(argument,"^\"") then
newarg[#newarg+1] = gsub(argument,"^\"","")
if not find(argument,"\"$") then
instring = true
end
elseif find(argument,"\"$") then
newarg[#newarg] = newarg[#newarg] .. " " .. gsub(argument,"\"$","")
instring = false
elseif instring then
newarg[#newarg] = newarg[#newarg] .. " " .. argument
else
newarg[#newarg+1] = argument
end
end
for i=1,-5,-1 do
newarg[i] = arg[i]
end
environment.initializearguments(newarg)
environment.originalarguments = mark(newarg)
environment.rawarguments = mark(arg)
arg = { } -- prevent duplicate handling
end
-- weird place ... depends on a not yet loaded module
function environment.texfile(filename)
return resolvers.findfile(filename,'tex')
end
function environment.luafile(filename)
local resolved = resolvers.findfile(filename,'tex') or ""
if resolved ~= "" then
return resolved
end
resolved = resolvers.findfile(filename,'texmfscripts') or ""
if resolved ~= "" then
return resolved
end
return resolvers.findfile(filename,'luatexlibs') or ""
end
environment.loadedluacode = loadfile -- can be overloaded
function environment.luafilechunk(filename,silent) -- used for loading lua bytecode in the format
filename = file.replacesuffix(filename, "lua")
local fullname = environment.luafile(filename)
if fullname and fullname ~= "" then
local data = environment.loadedluacode(fullname)
if trace_locating then
report_lua("loading file %s%s", fullname, not data and " failed" or "")
elseif not silent then
texio.write("<",data and "+ " or "- ",fullname,">")
end
return data
else
if trace_locating then
report_lua("unknown file %s", filename)
end
return nil
end
end
-- the next ones can use the previous ones / combine
function environment.loadluafile(filename, version)
local lucname, luaname, chunk
local basename = file.removesuffix(filename)
if basename == filename then
lucname, luaname = basename .. ".luc", basename .. ".lua"
else
lucname, luaname = nil, basename -- forced suffix
end
-- when not overloaded by explicit suffix we look for a luc file first
local fullname = (lucname and environment.luafile(lucname)) or ""
if fullname ~= "" then
if trace_locating then
report_lua("loading %s", fullname)
end
chunk = loadfile(fullname) -- this way we don't need a file exists check
end
if chunk then
assert(chunk)()
if version then
-- we check of the version number of this chunk matches
local v = version -- can be nil
if modules and modules[filename] then
v = modules[filename].version -- new method
elseif versions and versions[filename] then
v = versions[filename] -- old method
end
if v == version then
return true
else
if trace_locating then
report_lua("version mismatch for %s: lua=%s, luc=%s", filename, v, version)
end
environment.loadluafile(filename)
end
else
return true
end
end
fullname = (luaname and environment.luafile(luaname)) or ""
if fullname ~= "" then
if trace_locating then
report_lua("loading %s", fullname)
end
chunk = loadfile(fullname) -- this way we don't need a file exists check
if not chunk then
if trace_locating then
report_lua("unknown file %s", filename)
end
else
assert(chunk)()
return true
end
end
return false
end
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