main.go

// MIT License
//
// Copyright (c) 2020 Lack
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

// protoc-gen-deepcopy is a plugin for the Google protocol buffer compiler to generate
// Go code. Run it bu building this program and putting it in your path with
// the name
//		protoc-gen-deepcopy
// That word 'deepcopy' 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 --deepcopy_out=:out_directory --go_out=output_directory input_directory/file.proto
// to generate vine code for the protocol defined by file.proto.
// With input that, the output will be written to
//		output_directory/file.deepcopy.pb.go
//
// The generated code is documented in the package comment for
// the library.
//
// See the README and documentation is protocol buffers to learn more:
//		https://developers.google.com/protocol-buffers/
package main

import (
	"io/ioutil"
	"os"

	"github.com/gogo/protobuf/proto"

	"github.com/lack-io/vine/cmd/generator"
	"github.com/lack-io/vine/cmd/protoc-gen-deepcopy/plugin"
)

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.
	dp := plugin.New()

	generator.RegisterPlugin(dp)

	g := generator.New("deepcopy")
	g.EnableEdit()

	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 EnumDescriptors that
	// point to the file that defines them.
	g.WrapTypes()

	g.SetPackageNames()
	g.BuildTypeNameMap()

	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")
	}
}