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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
-- locales are a useless feature in and even dangerous for luatex
local setlocale = os.setlocale
setlocale(nil,nil) -- setlocale("all","C")
-- function os.resetlocale()
-- setlocale(nil,nil)
-- end
--
-- function os.pushlocale(l,...)
-- insert(stack, {
-- collate = setlocale(nil,"collate"),
-- ctype = setlocale(nil,"ctype"),
-- monetary = setlocale(nil,"monetary"),
-- numeric = setlocale(nil,"numeric"),
-- time = setlocale(nil,"time"),
-- })
-- if l then
-- setlocale(l,...)
-- else
-- setlocale(status.lc_collate ,"collate"),
-- setlocale(status.lc_ctype ,"ctype"),
-- setlocale(status.lc_monetary,"monetary"),
-- setlocale(status.lc_numeric ,"numeric"),
-- setlocale(status.lc_time ,"time"),
-- end
-- end
--
-- function os.poplocale()
-- local l = remove(stack)
-- if l then
-- setlocale(unpack(l))
-- else
-- resetlocale()
-- end
-- end
local report = logs.reporter("system")
function os.setlocale(a,b)
if a or b then
if report then
report()
report("You're messing with os.locale in a supposedly locale neutral enviroment. From")
report("now on are on your own and without support. Crashes or unexpected side effects")
report("can happen but don't bother the luatex and context developer team with it.")
report()
report = nil
end
setlocale(a,b)
end
end
-- dirty tricks (we will replace the texlua call by luatex --luaonly)
local validengines = allocate {
["luatex"] = true,
["luajittex"] = true,
}
local basicengines = allocate {
["luatex"] = "luatex",
["texlua"] = "luatex", -- obsolete
["texluac"] = "luatex", -- obsolete
["luajittex"] = "luajittex",
["texluajit"] = "luajittex", -- obsolete
}
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 = { }
local files = { }
environment.arguments = arguments
environment.files = files
environment.sortedflags = 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
if not environment.ownname then
if os.selfpath and os.selfname then
environment.ownname = file.addsuffix(file.join(os.selfpath,os.selfname),"lua")
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
if find(argument,"\"$") then
newarg[#newarg+1] = gsub(argument,"^\"(.-)\"$","%1")
instring = false
else
newarg[#newarg+1] = gsub(argument,"^\"","")
instring = true
end
elseif find(argument,"\"$") then
if instring then
newarg[#newarg] = newarg[#newarg] .. " " .. gsub(argument,"\"$","")
instring = false
else
newarg[#newarg+1] = argument
end
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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