| -------------------------------------------------------------------------------- |
| -- Copyright (c) 2006-2013 Fabien Fleutot and others. |
| -- |
| -- All rights reserved. |
| -- |
| -- This program and the accompanying materials are made available |
| -- under the terms of the Eclipse Public License v1.0 which |
| -- accompanies this distribution, and is available at |
| -- http://www.eclipse.org/legal/epl-v10.html |
| -- |
| -- This program and the accompanying materials are also made available |
| -- under the terms of the MIT public license which accompanies this |
| -- distribution, and is available at http://www.lua.org/license.html |
| -- |
| -- Contributors: |
| -- Fabien Fleutot - API and implementation |
| -- |
| -------------------------------------------------------------------------------- |
| |
| local package = package |
| |
| require 'metalua.table' |
| require 'metalua.string' |
| |
| package.metalua_extension_prefix = 'metalua.extension.' |
| |
| package.mpath = package.mpath or os.getenv 'LUA_MPATH' or |
| './?.mlua;/usr/local/share/lua/5.1/?.mlua;'.. |
| '/usr/local/share/lua/5.1/?/init.mlua;'.. |
| '/usr/local/lib/lua/5.1/?.mlua;'.. |
| '/usr/local/lib/lua/5.1/?/init.mlua' |
| |
| |
| ---------------------------------------------------------------------- |
| -- resc(k) returns "%"..k if it's a special regular expression char, |
| -- or just k if it's normal. |
| ---------------------------------------------------------------------- |
| local regexp_magic = table.transpose{ |
| "^", "$", "(", ")", "%", ".", "[", "]", "*", "+", "-", "?" } |
| local function resc(k) |
| return regexp_magic[k] and '%'..k or k |
| end |
| |
| ---------------------------------------------------------------------- |
| -- Take a Lua module name, return the open file and its name, |
| -- or <false> and an error message. |
| ---------------------------------------------------------------------- |
| function package.findfile(name, path_string) |
| local config_regexp = ("([^\n])\n"):rep(5):sub(1, -2) |
| local dir_sep, path_sep, path_mark, execdir, igmark = |
| package.config:strmatch (config_regexp) |
| name = name:gsub ('%.', dir_sep) |
| local errors = { } |
| local path_pattern = string.format('[^%s]+', resc(path_sep)) |
| for path in path_string:gmatch (path_pattern) do |
| --printf('path = %s, rpath_mark=%s, name=%s', path, resc(path_mark), name) |
| local filename = path:gsub (resc (path_mark), name) |
| --printf('filename = %s', filename) |
| local file = io.open (filename, 'r') |
| if file then return file, filename end |
| table.insert(errors, string.format("\tno lua file %q", filename)) |
| end |
| return false, '\n'..table.concat(errors, "\n")..'\n' |
| end |
| |
| ---------------------------------------------------------------------- |
| -- Load a metalua source file. |
| ---------------------------------------------------------------------- |
| function package.metalua_loader (name) |
| local file, filename_or_msg = package.findfile (name, package.mpath) |
| if not file then return filename_or_msg end |
| local luastring = file:read '*a' |
| file:close() |
| local mlc = require 'metalua.compiler'.new() |
| return mlc :src_to_function (luastring, name) |
| end |
| |
| ---------------------------------------------------------------------- |
| -- Placed after lua/luac loader, so precompiled files have |
| -- higher precedence. |
| ---------------------------------------------------------------------- |
| table.insert(package.loaders, package.metalua_loader) |
| |
| ---------------------------------------------------------------------- |
| -- Load an extension. |
| ---------------------------------------------------------------------- |
| function extension (name, mlp) |
| local complete_name = package.metalua_extension_prefix..name |
| -- TODO: pass mlp around |
| local extend_func = require (complete_name) |
| local ast =extend_func(mlp) |
| return ast |
| end |
| |
| return package |