1 // Go support for Protocol Buffers - Google's data interchange format
3 // Copyright 2010 The Go Authors. All rights reserved.
4 // https://github.com/golang/protobuf
6 // Redistribution and use in source and binary forms, with or without
7 // modification, are permitted provided that the following conditions are
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
16 // * Neither the name of Google Inc. nor the names of its
17 // contributors may be used to endorse or promote products derived from
18 // this software without specific prior written permission.
20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 // protoc-gen-go is a plugin for the Google protocol buffer compiler to generate
33 // Go code. Run it by building this program and putting it in your path with
36 // That word 'go' at the end becomes part of the option string set for the
37 // protocol compiler, so once the protocol compiler (protoc) is installed
39 // protoc --go_out=output_directory input_directory/file.proto
40 // to generate Go bindings for the protocol defined by file.proto.
41 // With that input, the output will be written to
42 // output_directory/file.pb.go
44 // The generated code is documented in the package comment for
47 // See the README and documentation for protocol buffers to learn more:
48 // https://developers.google.com/protocol-buffers/
55 "github.com/golang/protobuf/proto"
56 "github.com/golang/protobuf/protoc-gen-go/generator"
60 // Begin by allocating a generator. The request and response structures are stored there
61 // so we can do error handling easily - the response structure contains the field to
65 data, err := ioutil.ReadAll(os.Stdin)
67 g.Error(err, "reading input")
70 if err := proto.Unmarshal(data, g.Request); err != nil {
71 g.Error(err, "parsing input proto")
74 if len(g.Request.FileToGenerate) == 0 {
75 g.Fail("no files to generate")
78 g.CommandLineParameters(g.Request.GetParameter())
80 // Create a wrapped version of the Descriptors and EnumDescriptors that
81 // point to the file that defines them.
89 // Send back the results.
90 data, err = proto.Marshal(g.Response)
92 g.Error(err, "failed to marshal output proto")
94 _, err = os.Stdout.Write(data)
96 g.Error(err, "failed to write output proto")