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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 rawset, rawget, loadfile, assert = rawset, rawget, loadfile, assert
local trace_locating = false trackers.register("resolvers.locating", function(v) trace_locating = v end)
local report_lua = logs.reporter("resolvers","lua")
local luautilities = utilities.lua
local luasuffixes = luautilities.suffixes
local texgettoks = tex and tex.gettoks
environment = environment or { }
local environment = environment
-- environment
local mt = {
__index = function(_,k)
if k == "version" then
local version = texgettoks and texgettoks("contextversiontoks")
if version and version ~= "" then
rawset(environment,"version",version)
return version
else
return "unknown"
end
elseif k == "kind" then
local kind = texgettoks and texgettoks("contextkindtoks")
if kind and kind ~= "" then
rawset(environment,"kind",kind)
return kind
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)
-- weird place ... depends on a not yet loaded module
function environment.texfile(filename)
return resolvers.findfile(filename,'tex')
end
function environment.luafile(filename) -- needs checking
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
-- local function checkstrip(filename)
-- local modu = modules[file.nameonly(filename)]
-- return modu and modu.dataonly
-- end
local stripindeed = false directives.register("system.compile.strip", function(v) stripindeed = v end)
local function strippable(filename)
if stripindeed then
local modu = modules[file.nameonly(filename)]
return modu and modu.dataonly
else
return false
end
end
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 = luautilities.loadedluacode(fullname,strippable,filename) -- can be overloaded
-- if trace_locating then
-- report_lua("loading file %a %s",fullname,not data and "failed" or "succeeded")
-- elseif not silent then
-- texio.write("<",data and "+ " or "- ",fullname,">")
-- end
if not silent then
report_lua("loading file %a %s",fullname,not data and "failed" or "succeeded")
end
return data
else
-- if trace_locating then
-- report_lua("unknown file %a",filename)
-- end
if not silent then
report_lua("unknown file %a",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
luaname = file.addsuffix(basename,luasuffixes.lua)
lucname = file.addsuffix(basename,luasuffixes.luc)
else
luaname = basename -- forced suffix
lucname = nil
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 %a",fullname)
end
-- maybe: package.loaded[file.nameonly(fullname)] = true
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 %a, lua version %a, luc version %a",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 %a",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 %a",filename)
end
else
assert(chunk)()
return true
end
end
return false
end
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