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if not modules then modules = { } end modules ['libs-imp-kpse'] = {
version = 1.001,
comment = "companion to luat-imp-kpse.mkxl",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- This is an experiment. It might make sense to have this available in case I want
-- more runners to use LuaMetaTeX in which case (as with mtxrun using LuaTeX) we
-- need to load kpse.
local libname = "kpse"
local libfile = (os.platform == "win64" and "kpathsea*w64")
or (os.platform == "win32" and "kpathsea*w32")
or "libkpathsea"
local libkpse = resolvers.libraries.validoptional(libname)
if package.loaded[libname] then
return package.loaded[libname]
end
-- This is a variant that loaded directly:
-- kpse = libkpse -- the library will issue warnings anyway
--
-- resolvers.libraries.optionalloaded(libname,libfile) -- no need to chedk if true
-- This variant delays loading and has a bit more protection:
local function okay()
if libkpse and resolvers.libraries.optionalloaded(libname,libfile) then
okay = function() return true end
else
okay = function() return false end
end
return okay()
end
local kpse = { }
for k, v in next, libkpse do
kpse[k] = function(...) if okay() then return v(...) end end
end
-- We properly register the module:
package.loaded[libname] = kpse
optional.loaded.kpse = kpse
-- A simple test:
-- kpse.set_program_name("pdftex")
-- print("find file:",kpse.find_file("oeps.tex"))
-- print("find file:",kpse.find_file("context.mkii"))
return kpse
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