syncthing/vendor/github.com/gogo/protobuf/protoc-min-version/minversion.go

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// Protocol Buffers for Go with Gadgets
//
// Copyright (c) 2013, The GoGo Authors. All rights reserved.
// http://github.com/gogo/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package main
import (
"fmt"
"github.com/gogo/protobuf/version"
"os"
"os/exec"
"strings"
)
func filter(ss []string, flag string) ([]string, string) {
s := make([]string, 0, len(ss))
var v string
for i := range ss {
if strings.Contains(ss[i], flag) {
vs := strings.Split(ss[i], "=")
v = vs[1]
continue
}
s = append(s, ss[i])
}
return s, v
}
func main() {
args, min := filter(os.Args[1:], "-version")
if !version.AtLeast(min) {
fmt.Printf("protoc version not high enough to parse this proto file\n")
return
}
gen := exec.Command("protoc", args...)
out, err := gen.CombinedOutput()
if err != nil {
fmt.Printf("%s\n", string(out))
panic(err)
}
}