github.com/gogo/protobuf@v1.3.2/protoc-min-version/minversion.go (about)

     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  
    29  package main
    30  
    31  import (
    32  	"fmt"
    33  	"os"
    34  	"os/exec"
    35  	"strings"
    36  
    37  	"github.com/gogo/protobuf/version"
    38  )
    39  
    40  func 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  
    54  func 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  }