platform_build_soong/python/proto.go

// Copyright 2017 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package python

import (
	"android/soong/android"
)

func genProto(ctx android.ModuleContext, protoFile android.Path, flags android.ProtoFlags, pkgPath string) android.Path {
	srcsZipFile := android.PathForModuleGen(ctx, protoFile.Base()+".srcszip")

	outDir := srcsZipFile.ReplaceExtension(ctx, "tmp")
	depFile := srcsZipFile.ReplaceExtension(ctx, "srcszip.d")

	rule := android.NewRuleBuilder()

	rule.Command().Text("rm -rf").Flag(outDir.String())
	rule.Command().Text("mkdir -p").Flag(outDir.String())

	android.ProtoRule(ctx, rule, protoFile, flags, nil, outDir, depFile, nil)

	// Proto generated python files have an unknown package name in the path, so package the entire output directory
	// into a srcszip.
	zipCmd := rule.Command().
		Tool(ctx.Config().HostToolPath(ctx, "soong_zip")).
		FlagWithOutput("-o ", srcsZipFile).
		FlagWithArg("-C ", outDir.String()).
		FlagWithArg("-D ", outDir.String())
	if pkgPath != "" {
		zipCmd.FlagWithArg("-P ", pkgPath)
	}

	rule.Command().Text("rm -rf").Flag(outDir.String())

	rule.Build(pctx, ctx, "protoc_"+protoFile.Rel(), "protoc "+protoFile.Rel())

	return srcsZipFile
}