File

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−-- Prosody IM
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−-- Copyright (C) 2008-2010 Matthew Wild
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−-- Copyright (C) 2008-2010 Waqas Hussain
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−--
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−-- This project is MIT/X11 licensed. Please see the
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−-- COPYING file in the source package for more information.
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−--
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−-- luacheck: ignore 113/CFG_PLUGINDIR
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−
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−local dir_sep, path_sep = package.config:match("^(%S+)%s(%S+)");
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−local lua_version = _VERSION:match(" (.+)$");
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−local plugin_dir = {};
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−for path in (CFG_PLUGINDIR or "./plugins/"):gsub("[/\\]", dir_sep):gmatch("[^"..path_sep.."]+") do
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−	path = path..dir_sep; -- add path separator to path end
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−	path = path:gsub(dir_sep..dir_sep.."+", dir_sep); -- coalesce multiple separaters
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−	plugin_dir[#plugin_dir + 1] = path;
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−end
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−
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−local io_open = io.open;
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−local envload = require "util.envload".envload;
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−
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−local function load_file(names)
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−	local file, err, path;
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−	for i=1,#plugin_dir do
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−		for j=1,#names do
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−			path = plugin_dir[i]..names[j];
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−			file, err = io_open(path);
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−			if file then
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−				local content = file:read("*a");
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−				file:close();
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−				return content, path;
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−			end
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−		end
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−	end
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−	return file, err;
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−end
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−
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−local function load_resource(plugin, resource)
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−	resource = resource or "mod_"..plugin..".lua";
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−	local names = {
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−		"mod_"..plugin..dir_sep..plugin..dir_sep..resource; -- mod_hello/hello/mod_hello.lua
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−		"mod_"..plugin..dir_sep..resource;                  -- mod_hello/mod_hello.lua
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−		plugin..dir_sep..resource;                          -- hello/mod_hello.lua
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−		resource;                                           -- mod_hello.lua
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−		"share"..dir_sep.."lua"..dir_sep..lua_version..dir_sep..resource;
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−		"share"..dir_sep.."lua"..dir_sep..lua_version..dir_sep.."mod_"..plugin..dir_sep..resource;
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−	};
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−
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−	return load_file(names);
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−end
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−
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−local function load_code(plugin, resource, env)
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−	local content, err = load_resource(plugin, resource);
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−	if not content then return content, err; end
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−	local path = err;
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−	local f, err = envload(content, "@"..path, env);
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−	if not f then return f, err; end
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−	return f, path;
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−end
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−
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−local function load_code_ext(plugin, resource, extension, env)
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−	local content, err = load_resource(plugin, resource.."."..extension);
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−	if not content and extension == "lib.lua" then
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−		content, err = load_resource(plugin, resource..".lua");
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−	end
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−	if not content then
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−		content, err = load_resource(resource, resource.."."..extension);
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−		if not content then
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−			return content, err;
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−		end
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−	end
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−	local path = err;
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−	local f, err = envload(content, "@"..path, env);
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−	if not f then return f, err; end
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−	return f, path;
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−end
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−
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−return {
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−	load_file = load_file;
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−	load_resource = load_resource;
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−	load_code = load_code;
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−	load_code_ext = load_code_ext;
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−};