1// Protocol Buffers for Go with Gadgets
2//
3// Copyright (c) 2013, The GoGo Authors. All rights reserved.
4// http://github.com/gogo/protobuf
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met:
9//
10//     * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12//     * Redistributions in binary form must reproduce the above
13// copyright notice, this list of conditions and the following disclaimer
14// in the documentation and/or other materials provided with the
15// distribution.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29package main
30
31import (
32	"fmt"
33	"os"
34	"os/exec"
35	"strings"
36
37	"github.com/gogo/protobuf/version"
38)
39
40func filter(ss []string, flag string) ([]string, string) {
41	s := make([]string, 0, len(ss))
42	var v string
43	for i := range ss {
44		if strings.Contains(ss[i], flag) {
45			vs := strings.Split(ss[i], "=")
46			v = vs[1]
47			continue
48		}
49		s = append(s, ss[i])
50	}
51	return s, v
52}
53
54func main() {
55	args, min := filter(os.Args[1:], "-version")
56	if !version.AtLeast(min) {
57		fmt.Printf("protoc version not high enough to parse this proto file\n")
58		return
59	}
60	gen := exec.Command("protoc", args...)
61	gen.Stderr = os.Stderr
62	gen.Stdout = os.Stdout
63	err := gen.Run()
64	if err != nil {
65		panic(err)
66	}
67}
68