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--!The Make-like Build Utility based on Lua
--
-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements. See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership. The ASF licenses this file
-- to you 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 - 2017, TBOOX Open Source Group.
--
-- @author ruki
-- @file has_flags.lua
--
-- imports
import("core.base.option")
import("core.project.config")
import("lib.detect.find_tool")
-- has the given flags for the current tool?
--
-- @param name the tool name
-- @param flags the flags
-- @param opt the argument options, .e.g {verbose = false, program = "", toolkind = "[cc|cxx|ld|ar|sh|gc|rc|dc|mm|mxx]"}
--
-- @return true or false
--
-- @code
-- local ok = has_flags("clang", "-g")
-- local ok = has_flags("clang", {"-g", "-O0"}, {program = "xcrun -sdk macosx clang"})
-- local ok = has_flags("clang", "-g", {toolkind = "cxx"})
-- @endcode
--
function main(name, flags, opt)
-- init options
opt = opt or {}
-- find tool program and version first
opt.version = true
local tool = find_tool(name, opt)
if not tool then
return false
end
-- wrap flags
flags = table.wrap(flags)
-- split flag group, .e.g "-I /xxx" => {"-I", "/xxx"}
local results = {}
for _, flag in ipairs(flags) do
flag = flag:trim()
if #flag > 0 then
if flag:find(" ", 1, true) then
table.join2(results, os.argv(flag))
else
table.insert(results, flag)
end
end
end
flags = results
-- init tool
opt.toolname = tool.name
opt.program = tool.program
opt.programver = tool.version
-- get tool arch
--
-- some tools select arch by path environment, not be flags, .e.g cl.exe of msvc)
-- so, it will affect the cache result
--
local arch = config.get("arch") or os.arch()
-- init cache and key
local key = tool.program .. "_" .. (tool.version or "") .. "_" .. (opt.toolkind or "") .. "_" .. table.concat(flags, " ") .. "_" .. arch
_g._RESULTS = _g._RESULTS or {}
local results = _g._RESULTS
-- @note avoid detect the same program in the same time if running in the coroutine (.e.g ccache)
local coroutine_running = coroutine.running()
if coroutine_running then
while _g._checking ~= nil and _g._checking == key do
coroutine.yield()
end
end
-- get result from the cache first
local result = results[key]
if result ~= nil then
return result
end
-- detect.tools.xxx.has_flags(flags, opt)?
_g._checking = ifelse(coroutine_running, key, nil)
local hasflags = import("detect.tools." .. tool.name .. ".has_flags", {try = true})
if hasflags then
result = hasflags(flags, opt)
else
result = try { function () os.runv(tool.program, flags); return true end }
end
_g._checking = nil
-- trace
if option.get("verbose") or opt.verbose then
cprint("checking for the flags(%s) %s ... %s", path.filename(tool.program), table.concat(flags, " "), ifelse(result, "${green}ok", "${red}no"))
end
-- save result to cache
results[key] = ifelse(result, result, false)
-- ok?
return result
end
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