Add support for .proto files in java modules
Test: m -j checkbuild
Change-Id: Ia03429948baebff85164a91a34507866c97a08ef
diff --git a/java/proto.go b/java/proto.go
new file mode 100644
index 0000000..324868a
--- /dev/null
+++ b/java/proto.go
@@ -0,0 +1,98 @@
+// 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 java
+
+import (
+ "github.com/google/blueprint"
+ "github.com/google/blueprint/proptools"
+
+ "android/soong/android"
+)
+
+func init() {
+ pctx.HostBinToolVariable("protocCmd", "aprotoc")
+}
+
+var (
+ proto = pctx.AndroidStaticRule("protoc",
+ blueprint.RuleParams{
+ Command: `rm -rf $outDir && mkdir -p $outDir && ` +
+ `$protocCmd $protoOut=$protoOutFlags:$outDir $protoFlags $in && ` +
+ `find $outDir -name "*.java" > $out`,
+ CommandDeps: []string{"$protocCmd"},
+ }, "protoFlags", "protoOut", "protoOutFlags", "outDir")
+)
+
+func genProto(ctx android.ModuleContext, protoFiles android.Paths,
+ protoFlags string, protoOut, protoOutFlags string) android.WritablePath {
+
+ protoFileList := android.PathForModuleGen(ctx, "proto.filelist")
+
+ ctx.ModuleBuild(pctx, android.ModuleBuildParams{
+ Rule: proto,
+ Description: "protoc " + protoFiles[0].Rel(),
+ Output: protoFileList,
+ Inputs: protoFiles,
+ Args: map[string]string{
+ "outDir": android.ProtoDir(ctx).String(),
+ "protoOut": protoOut,
+ "protoOutFlags": protoOutFlags,
+ "protoFlags": protoFlags,
+ },
+ })
+
+ return protoFileList
+}
+
+func protoDeps(ctx android.BottomUpMutatorContext, p *android.ProtoProperties) {
+ switch proptools.String(p.Proto.Type) {
+ case "micro":
+ ctx.AddDependency(ctx.Module(), staticLibTag, "libprotobuf-java-micro")
+ case "nano":
+ ctx.AddDependency(ctx.Module(), staticLibTag, "libprotobuf-java-nano")
+ case "stream":
+ // TODO(ccross): add dependency on protoc-gen-java-stream binary
+ ctx.PropertyErrorf("proto.type", `"stream" not supported yet`)
+ // No library for stream protobufs
+ case "lite", "":
+ ctx.AddDependency(ctx.Module(), staticLibTag, "libprotobuf-java-lite")
+ case "full":
+ if ctx.Host() {
+ ctx.AddDependency(ctx.Module(), staticLibTag, "libprotobuf-java-full")
+ } else {
+ ctx.PropertyErrorf("proto.type", "full java protos only supported on the host")
+ }
+ default:
+ ctx.PropertyErrorf("proto.type", "unknown proto type %q",
+ proptools.String(p.Proto.Type))
+ }
+}
+
+func protoFlags(ctx android.ModuleContext, p *android.ProtoProperties, flags javaBuilderFlags) javaBuilderFlags {
+ switch proptools.String(p.Proto.Type) {
+ case "micro":
+ flags.protoOutFlag = "--javamicro_out"
+ case "nano":
+ flags.protoOutFlag = "--javanano_out"
+ case "stream":
+ flags.protoOutFlag = "--javastream_out"
+ case "lite", "":
+ flags.protoOutFlag = "--java_out"
+ default:
+ ctx.PropertyErrorf("proto.type", "unknown proto type %q",
+ proptools.String(p.Proto.Type))
+ }
+ return flags
+}