--!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        check_main.lua
--

-- check it
function main(sourcefile)

    -- load source code
    local sourcecode = io.readfile(sourcefile)

    -- remove comment first
    sourcecode = sourcecode:gsub("/%*.-%*/", "")
    sourcecode = sourcecode:gsub("/%+.-%+/", "")
    sourcecode = sourcecode:gsub("//.-\n", "\n")

    -- find func main() {
    if sourcecode:find("void%s+main%s*%(.-%)") then
        return true
    end

    -- no main function
    return false
end


