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89 lines
2.5 KiB
Lua
89 lines
2.5 KiB
Lua
--[[
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Copyright 2014-2016 The Luvit Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS-IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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--]]
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--[[lit-meta
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name = "luvit/resource"
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version = "2.1.0"
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license = "Apache 2"
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homepage = "https://github.com/luvit/luvit/blob/master/deps/resource.lua"
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description = "Utilities for loading relative resources"
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dependencies = {
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"creationix/pathjoin@2.0.0"
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}
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tags = {"luvit", "relative", "resource"}
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]]
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local pathJoin = require('pathjoin').pathJoin
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local bundle = require('luvi').bundle
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local uv = require('uv')
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local function getPath()
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local caller = debug.getinfo(2, "S").source
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if caller:sub(1,1) == "@" then
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return caller:sub(2)
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elseif caller:sub(1, 7) == "bundle:" then
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return caller
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end
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error("Unknown file path type: " .. caller)
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end
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local function getDir()
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local caller = debug.getinfo(2, "S").source
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if caller:sub(1,1) == "@" then
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return pathJoin(caller:sub(2), "..")
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elseif caller:sub(1, 7) == "bundle:" then
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return "bundle:" .. pathJoin(caller:sub(8), "..")
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end
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error("Unknown file path type: " .. caller)
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end
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local function innerResolve(path, resolveOnly)
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local caller = debug.getinfo(2, "S").source
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if caller:sub(1,1) == "@" then
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path = pathJoin(caller:sub(2), "..", path)
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if resolveOnly then return path end
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local fd = assert(uv.fs_open(path, "r", 420))
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local stat = assert(uv.fs_fstat(fd))
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local data = assert(uv.fs_read(fd, stat.size, 0))
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uv.fs_close(fd)
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return data, path
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elseif caller:sub(1, 7) == "bundle:" then
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path = pathJoin(caller:sub(8), "..", path)
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if resolveOnly then return path end
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return bundle.readfile(path), "bundle:" .. path
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end
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end
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local function resolve(path)
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return innerResolve(path, true)
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end
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local function load(path)
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return innerResolve(path, false)
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end
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local function getProp(self, key)
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if key == "path" then return getPath() end
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if key == "dir" then return getDir() end
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end
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return setmetatable({
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resolve = resolve,
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load = load,
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}, { __index = getProp })
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