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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, TBOOX Open Source Group.
--
-- @author ruki
-- @file has_flags.lua
--
-- imports
import("core.cache.detectcache")
import("lib.detect.find_tool")
-- try running
function _try_running(program, argv, opt)
local errors = nil
return try { function () os.runv(program, argv, opt); 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)
-- only one flag?
if #flags > 1 then
return
end
-- make cache key
local key = "detect.tools.link.has_flags"
-- make allflags key
local flagskey = opt.program .. "_" .. (opt.programver or "")
-- get all allflags from argument list
local allflags = detectcache:get2(key, flagskey)
if not allflags then
-- get argument list
allflags = {}
local arglist = nil
try
{
function () os.runv(opt.program, {"-?"}, {envs = opt.envs}) end,
catch
{
function (errors) arglist = errors end
}
}
if arglist then
for arg in arglist:gmatch("(/[%-%a%d]+)%s+") do
allflags[arg:gsub("/", "-"):lower()] = true
end
end
-- save cache
detectcache:set2(key, flagskey, allflags)
detectcache:save()
end
return allflags[flags[1]:gsub("/", "-"):lower()]
end
-- try running to check flags
function _check_try_running(flags, opt)
-- make an stub source file
local flags_str = table.concat(flags, " "):lower()
local winmain = flags_str:find("subsystem:windows")
local sourcefile = path.join(os.tmpdir(), "detect", (winmain and "winmain_" or "") .. "link_has_flags.c")
if not os.isfile(sourcefile) then
if winmain then
io.writefile(sourcefile, "int WinMain(void* instance, void* previnst, char** argv, int argc)\n{return 0;}")
else
io.writefile(sourcefile, "int main(int argc, char** argv)\n{return 0;}")
end
end
-- compile the source file
local objectfile = os.tmpfile() .. ".obj"
local binaryfile = os.tmpfile() .. ".exe"
local cl = find_tool("cl")
if cl then
os.runv(cl.program, {"-c", "-nologo", "-Fo" .. objectfile, sourcefile}, {envs = opt.envs})
end
-- try link it
local ok, errors = _try_running(opt.program, table.join(flags, "-nologo", "-out:" .. binaryfile, objectfile), {envs = opt.envs})
os.tryrm(objectfile)
os.tryrm(binaryfile)
return ok, errors
end
-- ignore some flags
function _ignore_flags(flags)
local results = {}
for _, flag in ipairs(flags) do
flag = flag:lower()
if not flag:find("[%-/]def:.+%.def") and not flag:find("[%-/]export:") then
table.insert(results, flag)
end
end
return results
end
-- has_flags(flags)?
--
-- @param opt the argument options, e.g. {toolname = "", program = "", programver = "", toolkind = "[cc|cxx|ld|ar|sh|gc|rc|dc|mm|mxx]"}
--
-- @return true or false
--
function main(flags, opt)
-- ignore some flags
flags = _ignore_flags(flags)
if #flags == 0 then
return true
end
-- attempt to check it from the argument list
if _check_from_arglist(flags, opt) then
return true
end
-- try running to check it
return _check_try_running(flags, opt)
end
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