Matteo Scandolo | a6a3aee | 2019-11-26 13:30:14 -0700 | [diff] [blame] | 1 | // Go support for Protocol Buffers - Google's data interchange format |
| 2 | // |
| 3 | // Copyright 2010 The Go Authors. All rights reserved. |
| 4 | // https://github.com/golang/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 | // * 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. |
| 19 | // |
| 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. |
| 31 | |
| 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 |
| 34 | // the name |
| 35 | // protoc-gen-go |
| 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 |
| 38 | // you can run |
| 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 |
| 43 | // |
| 44 | // The generated code is documented in the package comment for |
| 45 | // the library. |
| 46 | // |
| 47 | // See the README and documentation for protocol buffers to learn more: |
| 48 | // https://developers.google.com/protocol-buffers/ |
| 49 | package main |
| 50 | |
| 51 | import ( |
| 52 | "io/ioutil" |
| 53 | "os" |
| 54 | |
| 55 | "github.com/golang/protobuf/proto" |
| 56 | "github.com/golang/protobuf/protoc-gen-go/generator" |
| 57 | ) |
| 58 | |
| 59 | func main() { |
| 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 |
| 62 | // report failure. |
| 63 | g := generator.New() |
| 64 | |
| 65 | data, err := ioutil.ReadAll(os.Stdin) |
| 66 | if err != nil { |
| 67 | g.Error(err, "reading input") |
| 68 | } |
| 69 | |
| 70 | if err := proto.Unmarshal(data, g.Request); err != nil { |
| 71 | g.Error(err, "parsing input proto") |
| 72 | } |
| 73 | |
| 74 | if len(g.Request.FileToGenerate) == 0 { |
| 75 | g.Fail("no files to generate") |
| 76 | } |
| 77 | |
| 78 | g.CommandLineParameters(g.Request.GetParameter()) |
| 79 | |
| 80 | // Create a wrapped version of the Descriptors and EnumDescriptors that |
| 81 | // point to the file that defines them. |
| 82 | g.WrapTypes() |
| 83 | |
| 84 | g.SetPackageNames() |
| 85 | g.BuildTypeNameMap() |
| 86 | |
| 87 | g.GenerateAllFiles() |
| 88 | |
| 89 | // Send back the results. |
| 90 | data, err = proto.Marshal(g.Response) |
| 91 | if err != nil { |
| 92 | g.Error(err, "failed to marshal output proto") |
| 93 | } |
| 94 | _, err = os.Stdout.Write(data) |
| 95 | if err != nil { |
| 96 | g.Error(err, "failed to write output proto") |
| 97 | } |
| 98 | } |