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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 extension.lua
--
-- imports
import("core.base.hashset")
-- get the archive extension
function main(url)
local urlpath = url:split('?', {plain = true})[1]
local extension = ""
local filename = path.filename(urlpath)
local extensionset = hashset.from({
".xmz", -- xmake compression format
".zip", ".7z", ".gz", ".xz", ".zst", ".tgz",
".bz2", ".tar", ".tar.gz", ".tar.xz",
".tar.zst", ".tar.bz2", ".tar.Z"})
local i = filename:lastof(".", true)
if i then
local p = filename:sub(1, i - 1):lastof(".", true)
if p and extensionset:has(filename:sub(p)) then i = p end
extension = filename:sub(i)
end
return extensionset:has(extension) and extension or ""
end
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