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// 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 android
import (
"github.com/google/blueprint"
)
func init() {
pctx.HostBinToolVariable("protocCmd", "aprotoc")
}
var (
proto = pctx.AndroidStaticRule("protoc",
blueprint.RuleParams{
Command: "$protocCmd $protoOut=$protoOutFlags:$outDir $protoFlags $in",
CommandDeps: []string{"$protocCmd"},
}, "protoFlags", "protoOut", "protoOutFlags", "outDir")
)
// TODO(ccross): protos are often used to communicate between multiple modules. If the only
// way to convert a proto to source is to reference it as a source file, and external modules cannot
// reference source files in other modules, then every module that owns a proto file will need to
// export a library for every type of external user (lite vs. full, c vs. c++ vs. java). It would
// be better to support a proto module type that exported a proto file along with some include dirs,
// and then external modules could depend on the proto module but use their own settings to
// generate the source.
func GenProto(ctx ModuleContext, protoFile Path,
protoFlags string, protoOut, protoOutFlags string, extensions []string) WritablePaths {
var outFiles WritablePaths
for _, ext := range extensions {
outFiles = append(outFiles, GenPathWithExt(ctx, "proto", protoFile, ext))
}
ctx.ModuleBuild(pctx, ModuleBuildParams{
Rule: proto,
Description: "protoc " + protoFile.Rel(),
Outputs: outFiles,
Input: protoFile,
Args: map[string]string{
"outDir": ProtoDir(ctx).String(),
"protoOut": protoOut,
"protoOutFlags": protoOutFlags,
"protoFlags": protoFlags,
},
})
return outFiles
}
func ProtoFlags(ctx ModuleContext, p *ProtoProperties) []string {
var protoFlags []string
if len(p.Proto.Local_include_dirs) > 0 {
localProtoIncludeDirs := PathsForModuleSrc(ctx, p.Proto.Local_include_dirs)
protoFlags = append(protoFlags, JoinWithPrefix(localProtoIncludeDirs.Strings(), "-I"))
}
if len(p.Proto.Include_dirs) > 0 {
rootProtoIncludeDirs := PathsForSource(ctx, p.Proto.Include_dirs)
protoFlags = append(protoFlags, JoinWithPrefix(rootProtoIncludeDirs.Strings(), "-I"))
}
protoFlags = append(protoFlags, "-I .")
return protoFlags
}
// ProtoDir returns the module's "gen/proto" directory
func ProtoDir(ctx ModuleContext) ModuleGenPath {
return PathForModuleGen(ctx, "proto")
}
// ProtoSubDir returns the module's "gen/proto/path/to/module" directory
func ProtoSubDir(ctx ModuleContext) ModuleGenPath {
return PathForModuleGen(ctx, "proto", ctx.ModuleDir())
}
type ProtoProperties struct {
Proto struct {
// Proto generator type. C++: full or lite. Java: micro, nano, stream, or lite.
Type *string `android:"arch_variant"`
// list of directories that will be added to the protoc include paths.
Include_dirs []string
// list of directories relative to the bp file that will
// be added to the protoc include paths.
Local_include_dirs []string
} `android:"arch_variant"`
}
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