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if not modules then modules = { } end modules ['data-lua'] = {
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"
}
-- This is now a plug in into l-lua (as we also use the extra paths elsewhere).
local resolvers, package = resolvers, package
local gsub = string.gsub
local concat = table.concat
local addsuffix = file.addsuffix
local P, S, Cs, lpegmatch = lpeg.P, lpeg.S, lpeg.Cs, lpeg.match
local luasuffixes = { 'tex', 'lua' }
local libsuffixes = { 'lib' }
local luaformats = { 'TEXINPUTS', 'LUAINPUTS' }
local libformats = { 'CLUAINPUTS' }
local helpers = package.helpers or { }
local methods = helpers.methods or { }
trackers.register("resolvers.libraries", function(v) helpers.trace = v end)
trackers.register("resolvers.locating", function(v) helpers.trace = v end)
helpers.report = logs.reporter("resolvers","libraries")
helpers.sequence = {
"already loaded",
"preload table",
"lua variable format",
"lib variable format",
"lua extra list",
"lib extra list",
"path specification",
"cpath specification",
"all in one fallback",
"not loaded",
}
local pattern = Cs(P("!")^0 / "" * (P("/") * P(-1) / "/" + P("/")^1 / "/" + 1)^0)
function helpers.cleanpath(path) -- hm, don't we have a helper for this?
return resolvers.resolve(lpegmatch(pattern,path))
end
local loadedaslib = helpers.loadedaslib
local loadedbypath = helpers.loadedbypath
local getextraluapaths = package.extraluapaths
local getextralibpaths = package.extralibpaths
local registerpath = helpers.registerpath
local lualibfile = helpers.lualibfile
local luaformatpaths
local libformatpaths
local function getluaformatpaths()
if not luaformatpaths then
luaformatpaths = { }
for i=1,#luaformats do
registerpath("lua format","lua",luaformatpaths,resolvers.expandedpathlistfromvariable(luaformats[i]))
end
end
return luaformatpaths
end
local function getlibformatpaths()
if not libformatpaths then
libformatpaths = { }
for i=1,#libformats do
registerpath("lib format","lib",libformatpaths,resolvers.expandedpathlistfromvariable(libformats[i]))
end
end
return libformatpaths
end
local function loadedbyformat(name,rawname,suffixes,islib)
local trace = helpers.trace
local report = helpers.report
if trace then
report("locating %a as %a using formats %a",rawname,name,suffixes)
end
for i=1,#suffixes do -- so we use findfile and not a lookup loop
local format = suffixes[i]
local resolved = resolvers.findfile(name,format) or ""
if trace then
report("checking %a using format %a",name,format)
end
if resolved ~= "" then
if trace then
report("lib %a located on %a",name,resolved)
end
local result = nil
if islib then
result = loadedaslib(resolved,rawname)
else
result = loadfile(resolved)
end
if result then
return true, result()
end
end
end
end
helpers.loadedbyformat = loadedbyformat
-- print(lualibfile("bar"))
-- print(lualibfile("foo.bar"))
-- print(lualibfile("crap/foo...bar"))
-- print(lualibfile("crap//foo.bar"))
-- print(lualibfile("crap/../foo.bar"))
-- print(lualibfile("crap/.././foo.bar"))
-- alternatively we could split in path and base and temporary set the libpath to path
-- we could build a list of relevant paths but for tracing it's better to have the
-- whole lot (ok, we could skip the duplicates)
local shown = false
methods["lua variable format"] = function(name)
if not shown and helpers.trace then
local luapaths = getluaformatpaths() -- triggers building
if #luapaths > 0 then
helpers.report("using %s lua format paths",#luapaths)
else
helpers.report("no lua format paths defined")
end
shown = true
end
local thename = lualibfile(name)
local luaname = addsuffix(thename,"lua")
local done, result = loadedbyformat(luaname,name,luasuffixes,false)
if done then
return true, result
end
end
local shown = false
methods["lib variable format"] = function(name)
if not shown and helpers.trace then
local libpaths = getlibformatpaths() -- triggers building
if #libpaths > 0 then
helpers.report("using %s lib format paths",#libpaths)
else
helpers.report("no lib format paths defined")
end
shown = true
end
local thename = lualibfile(name)
local libname = addsuffix(thename,os.libsuffix)
local done, result = loadedbyformat(libname,name,libsuffixes,true)
if done then
return true, result
end
end
-- package.extraclibpath(environment.ownpath)
resolvers.loadlualib = require
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