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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 - 2019, TBOOX Open Source Group.
--
-- @author ruki
-- @file has_flags.lua
--
-- imports
import("lib.detect.cache")
-- try running
function _try_running(...)
local argv = {...}
local errors = nil
return try { function () os.runv(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)
-- only one flag?
if #flags > 1 then
return
end
-- make cache key
local key = "detect.tools.rustc.has_flags"
-- make allflags key
local flagskey = opt.program .. "_" .. (opt.programver or "")
-- load cache
local cacheinfo = cache.load(key)
-- get all allflags from argument list
local allflags = cacheinfo[flagskey]
if not allflags then
-- get argument list
allflags = {}
local arglist = os.iorunv(opt.program, {"--help"})
if arglist then
for arg in arglist:gmatch("%s+(%-[%-%a%d]+)%s+") do
allflags[arg] = true
end
end
-- save cache
cacheinfo[flagskey] = allflags
cache.save(key, cacheinfo)
end
-- ok?
return allflags[flags[1]]
end
-- try running to check flags
function _check_try_running(flags, opt)
-- make an stub source file
local sourcefile = path.join(os.tmpdir(), "detect", "rustc_has_flags.rs")
if not os.isfile(sourcefile) then
io.writefile(sourcefile, "fn main() {\n}")
end
-- check it
local objectfile = os.tmpfile() .. ".o"
local ok, errors = _try_running(opt.program, table.join("--emit", "obj", flags, "-o", objectfile, sourcefile))
-- remove files
os.tryrm(objectfile)
-- ok?
return ok, errors
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)
-- 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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