main.go

// Copyright 2016 The protoc-gen-cobra authors. All rights reserved.
//
// Based on protoc-gen-go from https://github.com/golang/protobuf.
// Copyright 2010 The Go Authors.  All rights reserved.

// protoc-gen-cobra is a plugin for the Google protocol buffer compiler to
// generate Go code to be used for building command line tools using cobra.
// Run it by building this program and putting it in your path with
// the name
// 	protoc-gen-cobra
// That word 'cobra' at the end becomes part of the option string set for the
// protocol compiler, so once the protocol compiler (protoc) is installed
// you can run
// 	protoc --cobra_out=output_directory input_directory/file.proto
// to generate Go bindings for the protocol defined by file.proto.
// With that input, the output will be written to
// 	output_directory/file.pb.go
// Use it combined with the grpc output
//	protoc --go_out=plugins=grpc:. --cobra_out=plugins=client:. *.proto
//
// The generated code is documented in the package comment for
// the library.
//
// See the README and documentation for protocol buffers to learn more:
// 	https://developers.google.com/protocol-buffers/
package main

import (
	"io/ioutil"
	"os"

	"github.com/golang/protobuf/proto"

	"github.com/tetratelabs/protoc-gen-cobra/generator"
)

func main() {
	// Begin by allocating a generator. The request and response structures are stored there
	// so we can do error handling easily - the response structure contains the field to
	// report failure.
	g := generator.New()

	data, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		g.Error(err, "reading input")
	}

	if err := proto.Unmarshal(data, g.Request); err != nil {
		g.Error(err, "parsing input proto")
	}

	if len(g.Request.FileToGenerate) == 0 {
		g.Fail("no files to generate")
	}

	g.CommandLineParameters(g.Request.GetParameter())

	// Create a wrapped version of the Descriptors and EnumDescriptors that
	// point to the file that defines them.
	g.WrapTypes()

	g.SetPackageNames()

	g.GenerateAllFiles()

	// Send back the results.
	data, err = proto.Marshal(g.Response)
	if err != nil {
		g.Error(err, "failed to marshal output proto")
	}
	_, err = os.Stdout.Write(data)
	if err != nil {
		g.Error(err, "failed to write output proto")
	}
}