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if not modules then modules = { } end modules ['file-res'] = {
version = 1.001,
comment = "companion to supp-fil.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local tonumber = tonumber
local format, find = string.format, string.find
local isfile = lfs.isfile
local is_qualified_path = file.is_qualified_path
local hasscheme, urlescape = url.hasscheme, url.escape
local trace_files = false trackers.register("resolvers.readfile", function(v) trace_files = v end)
local trace_details = false trackers.register("resolvers.readfile.details", function(v) trace_details = v end)
local report_files = logs.reporter("files","readfile")
resolvers.maxreadlevel = 2
directives.register("resolvers.maxreadlevel", function(v)
-- resolvers.maxreadlevel = (v == false and 0) or (v == true and 2) or tonumber(v) or 2
resolvers.maxreadlevel = v == false and 0 or tonumber(v) or 2
end)
local finders, loaders, openers = resolvers.finders, resolvers.loaders, resolvers.openers
local found = { } -- can best be done in the resolver itself
local function readfilename(specification,backtrack,treetoo)
if trace_details then
report_files(table.serialize(specification,"specification"))
end
local name = specification.filename
local fnd = name and found[name]
if not fnd then
local names
local suffix = file.suffix(name)
if suffix ~= "" then
names = { name }
else
local defaultsuffixes = resolvers.defaultsuffixes
names = { }
for i=1,#defaultsuffixes do
names[i] = name .. "." .. defaultsuffixes[i]
end
if trace_files then
report_files("locating: %s, using default suffixes: %a",name,defaultsuffixes)
end
end
for i=1,#names do
local fname = names[i]
if isfile(fname) then
if trace_files then
report_files("found local: %s",name)
end
fnd = fname
break
end
end
if not fnd and backtrack then
for i=1,#names do
local fname = names[i]
for i=1,backtrack,1 do
fname = "../" .. fname
if isfile(fname) then
if trace_files then
report_files("found by backtracking: %s",fname)
end
fnd = fname
break
elseif trace_files then
report_files("not found by backtracking: %s",fname)
end
end
if fnd then
break
end
end
end
if not fnd then
local paths = resolvers.getextrapaths()
if paths then
for i=1,#paths do
for i=1,#names do
local fname = paths[i] .. "/" .. names[i]
if isfile(fname) then
if trace_files then
report_files("found on extra path: %s",fname)
end
fnd = fname
break
end
end
if fnd then
break
end
end
end
end
if not fnd and treetoo then
fnd = resolvers.findtexfile(name) or ""
if trace_files then
if fnd ~= "" then
report_files("found by tree lookup: %s",fnd)
else
report_files("not found by tree lookup: %s",name)
end
end
end
found[name] = fnd
elseif trace_files then
if fnd ~= "" then
report_files("already found: %s",fnd)
else
report_files("already not found: %s",name)
end
end
return fnd or ""
end
-- resolvers.readfilename = readfilename -- bonus use getreadfilename instead
function resolvers.finders.original(specification) -- handy, see memstreams
return specification.path
end
function finders.job(specification) return readfilename(specification,false, false) end -- current path, no backtracking
function finders.loc(specification) return readfilename(specification,resolvers.maxreadlevel,false) end -- current path, backtracking
function finders.sys(specification) return readfilename(specification,false, true ) end -- current path, obeys tex search
function finders.fix(specification) return readfilename(specification,resolvers.maxreadlevel,false) end -- specified path, backtracking
function finders.set(specification) return readfilename(specification,false, false) end -- specified path, no backtracking
function finders.any(specification) return readfilename(specification,resolvers.maxreadlevel,true ) end -- loc job sys
openers.job = openers.file loaders.job = loaders.file -- default anyway
openers.loc = openers.file loaders.loc = loaders.file
openers.sys = openers.file loaders.sys = loaders.file
openers.fix = openers.file loaders.fix = loaders.file
openers.set = openers.file loaders.set = loaders.file
openers.any = openers.file loaders.any = loaders.file
local function getreadfilename(scheme,path,name) -- better do a split and then pass table
local fullname
if hasscheme(name) or is_qualified_path(name) then
fullname = name
else
if not find(name,"%",1,true) then
name = urlescape(name) -- if no % in names
end
fullname = ((path == "") and format("%s:///%s",scheme,name)) or format("%s:///%s/%s",scheme,path,name)
end
return resolvers.findtexfile(fullname) or "" -- can be more direct
end
resolvers.getreadfilename = getreadfilename
-- a name belonging to the run but also honoring qualified
local implement = interfaces.implement
implement {
name = "getreadfilename",
actions = { getreadfilename, context },
arguments = "3 strings",
}
implement {
name = "locfilename",
actions = { getreadfilename, context },
arguments = { "'loc'","'.'", "string" },
}
implement {
name = "doifelselocfile",
actions = { getreadfilename, isfile, commands.doifelse },
arguments = { "'loc'","'.'", "string" },
}
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