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if not modules then modules = { } end modules ['libs-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"
}
-- This is a loader for optional libraries in luametatex with context lmtx. It's
-- kind of experimental. We also use a different locator than in mkiv because we
-- don't support loading lua libraries and swiglibs any more. Of course one can
-- try the regular lua loaders but we just assume that a user then knows what (s)he
-- is doing.
local type, unpack = type, unpack
-- here we implement the resolver
local type = type
local nameonly = file.nameonly
local joinfile = file.join
local addsuffix = file.addsuffix
local qualifiedpath = file.is_qualified_path
local isfile = lfs.isfile
local findfile = resolvers.findfile
local expandpaths = resolvers.expandedpathlistfromvariable
local report = logs.reporter("resolvers","libraries")
local trace = false
local silent = false
trackers.register("resolvers.lib", function(v) trace = v end)
trackers.register("resolvers.lib.silent", function(v) silent = v end)
local function findlib(required) -- todo: cache
local suffix = os.libsuffix or "so"
if not qualifiedpath(required) then
local list = directives.value("system.librarynames" )
local only = nameonly(required)
if type(list) == "table" then
list = list[only]
if type(list) ~= "table" then
list = { only }
end
else
list = { only }
end
if trace then
report("using lookup list for library %a: % | t",only,list)
end
for i=1,#list do
local name = list[i]
local found = findfile(name,"lib")
if not found then
found = findfile(addsuffix(name,suffix),"lib")
end
if found then
if trace then
report("library %a resolved via %a path to %a",name,"tds lib",found)
end
return found
end
end
if expandpaths then
local list = expandpaths("PATH")
local base = addsuffix(only,suffix)
for i=1,#list do
local full = joinfile(list[i],base)
local found = isfile(full) and full
if found then
if trace then
report("library %a resolved via %a path to %a",name,"system",found)
end
return found
end
end
end
elseif isfile(addsuffix(required,suffix)) then
if trace then
report("library with qualified name %a %sfound",required,"")
end
return required
else
if trace then
report("library with qualified name %a %sfound",required,"not ")
end
end
return false
end
local foundlibraries = table.setmetatableindex(function(t,k)
local v = findlib(k)
t[k] = v
return v
end)
function resolvers.findlib(required)
return foundlibraries[required]
end
-- here we implement the loader
local libraries = { }
resolvers.libraries = libraries
local report = logs.reporter("optional")
if optional then optional.loaded = { } end
function libraries.validoptional(name)
local thelib = optional and optional[name]
if not thelib then
-- forget about it, no message here
elseif thelib.initialize then
return thelib
else
report("invalid optional library %a",libname)
end
end
function libraries.optionalloaded(name,libnames)
local thelib = optional and optional[name]
if not thelib then
report("no optional %a library found",name)
else
local thelib_initialize = thelib.initialize
if not thelib_initialize then
report("invalid optional library %a",name)
else
if type(libnames) == "string" then
libnames = { libnames }
end
if type(libnames) == "table" then
for i=1,#libnames do
local libname = libnames[i]
local filename = foundlibraries[libname]
if filename then
libnames[i] = filename
else
report("unable to locate library %a",libname)
return
end
end
local initialized = thelib_initialize(unpack(libnames))
if not initialized then
report("unable to initialize library '% + t'",libnames)
elseif not silent then
report("using library '% + t'",libnames)
end
return initialized
end
end
end
end
if FFISUPPORTED and ffi and ffi.load then
local ffiload = ffi.load
function ffi.load(name)
local full = name and foundlibraries[name]
if full then
return ffiload(full)
else
return ffiload(name)
end
end
end
-- local patterns = {
-- "libs-imp-%s.mkxl",
-- "libs-imp-%s.mklx",
-- }
--
-- local function action(name,foundname)
-- -- could be one command
-- context.startreadingfile()
-- context.input(foundname)
-- context.stopreadingfile()
-- end
--
-- interfaces.implement {
-- name = "uselibrary",
-- arguments = "string"
-- actions = function(name)
-- resolvers.uselibrary {
-- category = "color definition",
-- name = name,
-- patterns = patterns,
-- action = action,
-- onlyonce = true,
-- }
-- end
-- }
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