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if not modules then modules = { } end modules ['data-ini'] = {
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 gsub, find, gmatch, char = string.gsub, string.find, string.gmatch, string.char
local concat = table.concat
local next, type = next, type
local filedirname, filebasename, fileextname, filejoin = file.dirname, file.basename, file.extname, file.join
local trace_locating = false trackers.register("resolvers.locating", function(v) trace_locating = v end)
local trace_detail = false trackers.register("resolvers.details", function(v) trace_detail = v end)
local trace_expansions = false trackers.register("resolvers.expansions", function(v) trace_expansions = v end)
local report_initialization = logs.reporter("resolvers","initialization")
local ostype, osname, ossetenv, osgetenv = os.type, os.name, os.setenv, os.getenv
-- The code here used to be part of a data-res but for convenience
-- we now split it over multiple files. As this file is now the
-- starting point we introduce resolvers here.
resolvers = resolvers or { }
local resolvers = resolvers
-- We don't want the kpse library to kick in. Also, we want to be able to
-- execute programs. Control over execution is implemented later.
texconfig.kpse_init = false
texconfig.shell_escape = 't'
kpse = { original = kpse }
setmetatable(kpse, {
__index = function(kp,name)
report_initialization("fatal error: kpse library is accessed (key: %s)",name)
os.exit()
end
} )
-- First we check a couple of environment variables. Some might be
-- set already but we need then later on. We start with the system
-- font path.
do
local osfontdir = osgetenv("OSFONTDIR")
if osfontdir and osfontdir ~= "" then
-- ok
elseif osname == "windows" then
ossetenv("OSFONTDIR","c:/windows/fonts//")
elseif osname == "macosx" then
ossetenv("OSFONTDIR","$HOME/Library/Fonts//;/Library/Fonts//;/System/Library/Fonts//")
end
end
-- Next comes the user's home path. We need this as later on we have
-- to replace ~ with its value.
do
local homedir = osgetenv(ostype == "windows" and 'USERPROFILE' or 'HOME') or ''
if not homedir or homedir == "" then
homedir = char(127) -- we need a value, later we wil trigger on it
end
homedir = file.collapsepath(homedir)
ossetenv("HOME", homedir) -- can be used in unix cnf files
ossetenv("USERPROFILE",homedir) -- can be used in windows cnf files
environment.homedir = homedir
end
-- The following code sets the name of the own binary and its
-- path. This is fallback code as we have os.selfdir now.
do
local args = environment.originalarguments or arg -- this needs a cleanup
local ownbin = environment.ownbin or args[-2] or arg[-2] or args[-1] or arg[-1] or arg[0] or "luatex"
local ownpath = environment.ownpath or os.selfdir
ownbin = file.collapsepath(ownbin)
ownpath = file.collapsepath(ownpath)
if not ownpath or ownpath == "" or ownpath == "unset" then
ownpath = args[-1] or arg[-1]
ownpath = ownpath and filedirname(gsub(ownpath,"\\","/"))
if not ownpath or ownpath == "" then
ownpath = args[-0] or arg[-0]
ownpath = ownpath and filedirname(gsub(ownpath,"\\","/"))
end
local binary = ownbin
if not ownpath or ownpath == "" then
ownpath = ownpath and filedirname(binary)
end
if not ownpath or ownpath == "" then
if os.binsuffix ~= "" then
binary = file.replacesuffix(binary,os.binsuffix)
end
local path = osgetenv("PATH")
if path then
for p in gmatch(path,"[^"..io.pathseparator.."]+") do
local b = filejoin(p,binary)
if lfs.isfile(b) then
-- we assume that after changing to the path the currentdir function
-- resolves to the real location and use this side effect here; this
-- trick is needed because on the mac installations use symlinks in the
-- path instead of real locations
local olddir = lfs.currentdir()
if lfs.chdir(p) then
local pp = lfs.currentdir()
if trace_locating and p ~= pp then
report_initialization("following symlink '%s' to '%s'",p,pp)
end
ownpath = pp
lfs.chdir(olddir)
else
if trace_locating then
report_initialization("unable to check path '%s'",p)
end
ownpath = p
end
break
end
end
end
end
if not ownpath or ownpath == "" then
ownpath = "."
report_initialization("forcing fallback ownpath .")
elseif trace_locating then
report_initialization("using ownpath '%s'",ownpath)
end
end
environment.ownbin = ownbin
environment.ownpath = ownpath
end
resolvers.ownpath = environment.ownpath
function resolvers.getownpath()
return environment.ownpath
end
-- The self variables permit us to use only a few (or even no)
-- environment variables.
do
local ownpath = environment.ownpath or dir.current()
if ownpath then
ossetenv('SELFAUTOLOC', file.collapsepath(ownpath))
ossetenv('SELFAUTODIR', file.collapsepath(ownpath .. "/.."))
ossetenv('SELFAUTOPARENT', file.collapsepath(ownpath .. "/../.."))
else
report_initialization("error: unable to locate ownpath")
os.exit()
end
end
-- The running os:
-- todo: check is context sits here os.platform is more trustworthy
-- that the bin check as mtx-update runs from another path
local texos = environment.texos or osgetenv("TEXOS")
local texmfos = environment.texmfos or osgetenv('SELFAUTODIR')
if not texos or texos == "" then
texos = file.basename(texmfos)
end
ossetenv('TEXMFOS', texmfos) -- full bin path
ossetenv('TEXOS', texos) -- partial bin parent
ossetenv('SELFAUTOSYSTEM',os.platform) -- bonus
environment.texos = texos
environment.texmfos = texmfos
-- The current root:
local texroot = environment.texroot or osgetenv("TEXROOT")
if not texroot or texroot == "" then
texroot = osgetenv('SELFAUTOPARENT')
ossetenv('TEXROOT',texroot)
end
environment.texroot = file.collapsepath(texroot)
-- Tracing. Todo ...
function resolvers.settrace(n) -- no longer number but: 'locating' or 'detail'
if n then
trackers.disable("resolvers.*")
trackers.enable("resolvers."..n)
end
end
resolvers.settrace(osgetenv("MTX_INPUT_TRACE"))
-- todo:
-- if profiler and osgetenv("MTX_PROFILE_RUN") == "YES" then
-- profiler.start("luatex-profile.log")
-- end
-- a forward definition
if not resolvers.resolve then
function resolvers.resolve (s) return s end
function resolvers.unresolve(s) return s end
function resolvers.repath (s) return s end
end
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