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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(program, argv, opt)
local errors = nil
local ok = try {
function ()
os.runv(program, argv, opt)
return true
end,
catch {
function (errs)
errors = (errs or ""):trim()
end
}
}
return ok, errors
end
-- attempt to check it from the argument list
function _check_from_arglist(flags, opt, islinker)
-- only for compiler and single flag
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
allflags = {}
-- try to get help from "go help build"
local help_output = try {
function ()
return os.iorunv(opt.program, {"help", "build"}, {envs = opt.envs})
end
}
if help_output then
-- parse flags from help output
for flag in help_output:gmatch("%s+(%-[%-%a%d=]+)%s+") do
allflags[flag] = true
end
end
-- also try "go build -h" for more detailed flags
local build_help = try {
function ()
return os.iorunv(opt.program, {"build", "-h"}, {envs = opt.envs})
end
}
if build_help then
for flag in build_help:gmatch("%s+(%-[%-%a%d=]+)%s+") do
allflags[flag] = true
end
end
-- save cache
detectcache:set2(key, flagskey, allflags)
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")
if not os.isfile(sourcefile) then
io.writefile(sourcefile, "package main\n\nfunc main() {\n}\n")
end
-- check flags for linker or compiler
-- Modern Go uses "go build" for both compilation and linking
local argv = {"build", "-o", os.tmpfile()}
table.join2(argv, flags)
table.insert(argv, sourcefile)
local ok, errors = _try_running(opt.program, argv, {envs = opt.envs})
return ok == true
end
-- has_flags(flags)?
--
-- @param opt the argument options, e.g. {toolname = "", program = "", programver = "", toolkind = "[gc|gcld|gcar]"}
--
-- @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
|
