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if not modules then modules = { } end modules ['util-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"
}
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, optionalquoted = string.unquoted, string.quoted, string.optionalquoted
local concat, insert, remove = table.concat, table.insert, table.remove
environment = environment or { }
local environment = environment
-- 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 (we will replace the texlua call by luatex --luaonly)
local validengines = allocate {
["luatex"] = true,
["luajittex"] = true,
-- ["luatex.exe"] = true,
-- ["luajittex.exe"] = true,
}
local basicengines = allocate {
["luatex"] = "luatex",
["texlua"] = "luatex",
["texluac"] = "luatex",
["luajittex"] = "luajittex",
["texluajit"] = "luajittex",
-- ["texlua.exe"] = "luatex",
-- ["texluajit.exe"] = "luajittex",
}
local luaengines = allocate {
["lua"] = true,
["luajit"] = true,
}
environment.validengines = validengines
environment.basicengines = basicengines
-- [-1] = binary
-- [ 0] = self
-- [ 1] = argument 1 ...
-- instead we could set ranges
if not arg then
environment.used_as_library = true
-- used as library
elseif luaengines[file.removesuffix(arg[-1])] then
-- arg[-1] = arg[0]
-- arg[ 0] = arg[1]
-- for k=2,#arg do
-- arg[k-1] = arg[k]
-- end
-- remove(arg) -- last
--
-- environment.used_as_library = true
elseif validengines[file.removesuffix(arg[0])] then
if arg[1] == "--luaonly" then
arg[-1] = arg[0]
arg[ 0] = arg[2]
for k=3,#arg do
arg[k-2] = arg[k]
end
remove(arg) -- last
remove(arg) -- pre-last
else
-- tex run
end
-- This is an ugly hack but it permits symlinking a script (say 'context') to 'mtxrun' as in:
--
-- ln -s /opt/minimals/tex/texmf-linux-64/bin/mtxrun context
--
-- The special mapping hack is needed because 'luatools' boils down to 'mtxrun --script base'
-- but it's unlikely that there will be more of this
local originalzero = file.basename(arg[0])
local specialmapping = { luatools == "base" }
if originalzero ~= "mtxrun" and originalzero ~= "mtxrun.lua" then
arg[0] = specialmapping[originalzero] or originalzero
insert(arg,0,"--script")
insert(arg,0,"mtxrun")
end
end
-- environment
environment.arguments = allocate()
environment.files = allocate()
environment.sortedflags = nil
-- context specific arguments (in order not to confuse the engine)
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
flag = gsub(flag,"^c:","")
arguments[flag] = unquoted(value or "")
else
flag = match(argument,"^%-+(.+)")
if flag then
flag = gsub(flag,"^c:","")
arguments[flag] = true
else
files[#files+1] = argument
end
end
end
end
environment.ownname = file.reslash(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.getargument(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
environment.argument = environment.getargument
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)
local resolveprefix = resolvers.resolve -- something rather special
arg = arg or environment.originalarguments
if noquote and #arg == 1 then
return unquoted(resolveprefix and resolveprefix(arg[1]) or arg[1])
elseif #arg > 0 then
local result = { }
for i=1,#arg do
result[i] = optionalquoted(resolveprefix and resolveprefix(arg[i]) or resolveprefix)
end
return concat(result," ")
else
return ""
end
end
-- handy in e.g. package.addluapath(environment.relativepath("scripts"))
function environment.relativepath(path,root)
if not path then
path = ""
end
if not file.is_rootbased_path(path) then
if not root then
root = file.pathpart(environment.ownscript or environment.ownname or ".")
end
if root == "" then
root = "."
end
path = root .. "/" .. path
end
return file.collapsepath(path,true)
end
-- -- when script lives on e:/tmp we get this:
--
-- print(environment.relativepath("x/y/z","c:/w")) -- c:/w/x/y/z
-- print(environment.relativepath("x")) -- e:/tmp/x
-- print(environment.relativepath("../x")) -- e:/x
-- print(environment.relativepath("./x")) -- e:/tmp/x
-- print(environment.relativepath("/x")) -- /x
-- print(environment.relativepath("c:/x")) -- c:/x
-- print(environment.relativepath("//x")) -- //x
-- print(environment.relativepath()) -- e:/tmp
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
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