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// Copyright 2016 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 cc
import (
"github.com/google/blueprint/pathtools"
"android/soong/android"
)
// genProto creates a rule to convert a .proto file to generated .pb.cc and .pb.h files and returns
// the paths to the generated files.
func genProto(ctx android.ModuleContext, protoFile android.Path, flags builderFlags) (cc, header android.WritablePath) {
var ccFile, headerFile android.ModuleGenPath
srcSuffix := ".cc"
if flags.protoC {
srcSuffix = ".c"
}
if flags.proto.CanonicalPathFromRoot {
ccFile = android.GenPathWithExt(ctx, "proto", protoFile, "pb"+srcSuffix)
headerFile = android.GenPathWithExt(ctx, "proto", protoFile, "pb.h")
} else {
rel := protoFile.Rel()
ccFile = android.PathForModuleGen(ctx, "proto", pathtools.ReplaceExtension(rel, "pb"+srcSuffix))
headerFile = android.PathForModuleGen(ctx, "proto", pathtools.ReplaceExtension(rel, "pb.h"))
}
protoDeps := flags.proto.Deps
if flags.protoOptionsFile {
optionsFile := pathtools.ReplaceExtension(protoFile.String(), "options")
optionsPath := android.PathForSource(ctx, optionsFile)
protoDeps = append(android.Paths{optionsPath}, protoDeps...)
}
outDir := flags.proto.Dir
depFile := ccFile.ReplaceExtension(ctx, "d")
outputs := android.WritablePaths{ccFile, headerFile}
rule := android.NewRuleBuilder()
android.ProtoRule(ctx, rule, protoFile, flags.proto, protoDeps, outDir, depFile, outputs)
rule.Build(pctx, ctx, "protoc_"+protoFile.Rel(), "protoc "+protoFile.Rel())
return ccFile, headerFile
}
func protoDeps(ctx DepsContext, deps Deps, p *android.ProtoProperties, static bool) Deps {
var lib string
if String(p.Proto.Plugin) == "" {
switch String(p.Proto.Type) {
case "full":
if ctx.useSdk() {
lib = "libprotobuf-cpp-full-ndk"
static = true
} else {
lib = "libprotobuf-cpp-full"
}
case "lite", "":
if ctx.useSdk() {
lib = "libprotobuf-cpp-lite-ndk"
static = true
} else {
lib = "libprotobuf-cpp-lite"
}
case "nanopb-c":
lib = "libprotobuf-c-nano"
static = true
case "nanopb-c-enable_malloc":
lib = "libprotobuf-c-nano-enable_malloc"
static = true
case "nanopb-c-16bit":
lib = "libprotobuf-c-nano-16bit"
static = true
case "nanopb-c-enable_malloc-16bit":
lib = "libprotobuf-c-nano-enable_malloc-16bit"
static = true
case "nanopb-c-32bit":
lib = "libprotobuf-c-nano-32bit"
static = true
case "nanopb-c-enable_malloc-32bit":
lib = "libprotobuf-c-nano-enable_malloc-32bit"
static = true
default:
ctx.PropertyErrorf("proto.type", "unknown proto type %q",
String(p.Proto.Type))
}
if static {
deps.StaticLibs = append(deps.StaticLibs, lib)
deps.ReexportStaticLibHeaders = append(deps.ReexportStaticLibHeaders, lib)
} else {
deps.SharedLibs = append(deps.SharedLibs, lib)
deps.ReexportSharedLibHeaders = append(deps.ReexportSharedLibHeaders, lib)
}
}
return deps
}
func protoFlags(ctx ModuleContext, flags Flags, p *android.ProtoProperties) Flags {
flags.Local.CFlags = append(flags.Local.CFlags, "-DGOOGLE_PROTOBUF_NO_RTTI")
flags.proto = android.GetProtoFlags(ctx, p)
if flags.proto.CanonicalPathFromRoot {
flags.Local.CommonFlags = append(flags.Local.CommonFlags, "-I"+flags.proto.SubDir.String())
}
flags.Local.CommonFlags = append(flags.Local.CommonFlags, "-I"+flags.proto.Dir.String())
if String(p.Proto.Plugin) == "" {
var plugin string
switch String(p.Proto.Type) {
case "nanopb-c", "nanopb-c-enable_malloc", "nanopb-c-16bit", "nanopb-c-enable_malloc-16bit", "nanopb-c-32bit", "nanopb-c-enable_malloc-32bit":
flags.protoC = true
flags.protoOptionsFile = true
flags.proto.OutTypeFlag = "--nanopb_out"
plugin = "protoc-gen-nanopb"
case "full":
flags.proto.OutTypeFlag = "--cpp_out"
case "lite":
flags.proto.OutTypeFlag = "--cpp_out"
flags.proto.OutParams = append(flags.proto.OutParams, "lite")
case "":
// TODO(b/119714316): this should be equivalent to "lite" in
// order to match protoDeps, but some modules are depending on
// this behavior
flags.proto.OutTypeFlag = "--cpp_out"
default:
ctx.PropertyErrorf("proto.type", "unknown proto type %q",
String(p.Proto.Type))
}
if plugin != "" {
path := ctx.Config().HostToolPath(ctx, plugin)
flags.proto.Deps = append(flags.proto.Deps, path)
flags.proto.Flags = append(flags.proto.Flags, "--plugin="+path.String())
}
}
return flags
}
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