--!A cross-platform build utility based on Lua
--
-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements.  See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership.  The ASF licenses this file
-- to you 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 - 2018, TBOOX Open Source Group.
--
-- @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("//.-\n", "\n")

    -- find int main(int argc, char** argv) {}
    if sourcecode:find("%s+main%s*%(.-%)") then
        return true
    end

    -- no main function
    return false
end