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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 has_flags.lua
--
-- imports
import("core.cache.detectcache")
import("core.language.language")
-- is linker?
function _islinker(flags, opt)
-- the tool kind is gcld or gcsh?
local toolkind = opt.toolkind or ""
return toolkind:endswith("ld") or toolkind:endswith("sh")
end
-- try running
function _try_running(...)
local argv = {...}
local errors = nil
return try { function () os.runv(table.unpack(argv)); return true end, catch { function (errs) errors = (errs or ""):trim() end }}, errors
end
-- attempt to check it from the argument list
function _check_from_arglist(flags, opt, islinker)
-- only for compiler
if islinker or #flags > 1 then
return
end
-- make cache key
local key = "core.tools.go.has_flags"
-- make flags key
local flagskey = opt.program .. "_" .. (opt.programver or "")
-- get all flags from argument list
local allflags = detectcache:get2(key, flagskey)
if not allflags then
-- attempt to get argument list from the error info (help menu)
allflags = {}
try
{
function () os.runv(opt.program, {"tool", "compile", "--help"}) end,
catch
{
function (errors)
local arglist = errors
if arglist then
for arg in arglist:gmatch("%s+(%-[%-%a%d]+)%s+") do
allflags[arg] = true
end
end
end
}
}
-- save cache
detectcache:set2(key, flagskey, allflags)
detectcache:save()
end
return allflags[flags[1]]
end
-- try running to check flags
function _check_try_running(flags, opt, islinker)
-- make an stub source file
local sourcefile = path.join(os.tmpdir(), "detect", "go_has_flags.go")
local objectfile = path.join(os.tmpdir(), "detect", "go_has_flags.o")
local targetfile = path.join(os.tmpdir(), "detect", "go_has_flags.bin")
if not os.isfile(sourcefile) then
io.writefile(sourcefile, "package main\nfunc main() {\n}")
end
-- check flags for linker
if islinker then
-- compile a object file first
if not os.isfile(objectfile) and not _try_running(opt.program, table.join("tool", "compile", "-o", objectfile, sourcefile)) then
return false
end
-- check it
return _try_running(opt.program, table.join("tool", "link", flags, "-o", targetfile, objectfile))
end
-- check flags for compiler
return _try_running(opt.program, table.join("tool", "compile", flags, "-o", objectfile, sourcefile))
end
-- has_flags(flags)?
--
-- @param opt the argument options, e.g. {toolname = "", program = "", programver = "", toolkind = "[cc|cxx|ld|ar|sh|gc|mm|mxx]"}
--
-- @return true or false
--
function main(flags, opt)
-- is linker?
local islinker = _islinker(flags, opt)
-- attempt to check it from the argument list
if _check_from_arglist(flags, opt, islinker) then
return true
end
-- try running to check it
return _check_try_running(flags, opt, islinker)
end
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