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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, Xmake Open Source Community.
--
-- @author ruki
-- @file extract_xmz.lua
--
-- imports
import("core.base.option")
import("core.base.bytes")
import("core.compress.lz4")
-- extract files
function _extract_files(archivefile, outputdir, opt)
local inputfile = io.open(archivefile, "rb")
local filesize = inputfile:size()
local readsize = 0
while readsize < filesize do
local data = inputfile:read(2)
local size = bytes(data):u16be(1)
local filepath
if size > 0 then
filepath = inputfile:read(size)
end
readsize = readsize + 2 + size
data = inputfile:read(4)
size = bytes(data):u32be(1)
local filedata
if size > 0 then
filedata = inputfile:read(size)
end
readsize = readsize + 4 + size
if filepath then
vprint("extracting %s, %d bytes", filepath, filedata and #filedata or 0)
if filedata then
io.writefile(path.join(outputdir, filepath), filedata, {encoding = "binary"})
else
os.touch(filepath)
end
end
end
inputfile:close()
end
-- decompress file
function _decompress_file(archivefile, outputfile, opt)
lz4.decompress_file(archivefile, outputfile)
end
-- extract file
--
-- @param archivefile the archive file. e.g. *.tar.gz, *.zip, *.7z, *.tar.bz2, ..
-- @param outputdir the output directory
-- @param options the options, e.g.. {excludes = {"*/dir/*", "dir/*"}}
--
function main(archivefile, outputdir, opt)
opt = opt or {}
local archivefile_tmp = os.tmpfile({ramdisk = false})
_decompress_file(archivefile, archivefile_tmp, opt)
_extract_files(archivefile_tmp, outputdir, opt)
os.tryrm(archivefile_tmp)
end
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