110 lines
3.8 KiB
Go
110 lines
3.8 KiB
Go
// Copyright 2020 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rust
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import (
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"android/soong/android"
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)
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var (
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defaultProtobufFlags = []string{""}
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)
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func init() {
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android.RegisterModuleType("rust_protobuf", RustProtobufFactory)
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android.RegisterModuleType("rust_protobuf_host", RustProtobufHostFactory)
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}
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var _ SourceProvider = (*protobufDecorator)(nil)
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type ProtobufProperties struct {
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// Path to the proto file that will be used to generate the source
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Proto *string `android:"path,arch_variant"`
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// List of additional flags to pass to aprotoc
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Proto_flags []string `android:"arch_variant"`
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}
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type protobufDecorator struct {
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*BaseSourceProvider
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Properties ProtobufProperties
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}
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func (proto *protobufDecorator) GenerateSource(ctx ModuleContext, deps PathDeps) android.Path {
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var protoFlags android.ProtoFlags
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pluginPath := ctx.Config().HostToolPath(ctx, "protoc-gen-rust")
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protoFlags.OutTypeFlag = "--rust_out"
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protoFlags.Flags = append(protoFlags.Flags, " --plugin="+pluginPath.String())
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protoFlags.Flags = append(protoFlags.Flags, defaultProtobufFlags...)
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protoFlags.Flags = append(protoFlags.Flags, proto.Properties.Proto_flags...)
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protoFlags.Deps = append(protoFlags.Deps, pluginPath)
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protoFile := android.OptionalPathForModuleSrc(ctx, proto.Properties.Proto)
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if !protoFile.Valid() {
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ctx.PropertyErrorf("proto", "invalid path to proto file")
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}
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outDir := android.PathForModuleOut(ctx)
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depFile := android.PathForModuleOut(ctx, proto.BaseSourceProvider.getStem(ctx)+".d")
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outputs := android.WritablePaths{android.PathForModuleOut(ctx, proto.BaseSourceProvider.getStem(ctx)+".rs")}
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rule := android.NewRuleBuilder()
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android.ProtoRule(ctx, rule, protoFile.Path(), protoFlags, protoFlags.Deps, outDir, depFile, outputs)
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rule.Build(pctx, ctx, "protoc_"+protoFile.Path().Rel(), "protoc "+protoFile.Path().Rel())
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proto.BaseSourceProvider.OutputFile = outputs[0]
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return outputs[0]
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}
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func (proto *protobufDecorator) SourceProviderProps() []interface{} {
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return append(proto.BaseSourceProvider.SourceProviderProps(), &proto.Properties)
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}
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func (proto *protobufDecorator) SourceProviderDeps(ctx DepsContext, deps Deps) Deps {
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deps = proto.BaseSourceProvider.SourceProviderDeps(ctx, deps)
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deps.Rustlibs = append(deps.Rustlibs, "libprotobuf")
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return deps
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}
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// rust_protobuf generates protobuf rust code from the provided proto file. This uses the protoc-gen-rust plugin for
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// protoc. Additional flags to the protoc command can be passed via the proto_flags property. This module type will
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// create library variants that can be used as a crate dependency by adding it to the rlibs, dylibs, and rustlibs
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// properties of other modules.
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func RustProtobufFactory() android.Module {
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module, _ := NewRustProtobuf(android.HostAndDeviceSupported)
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return module.Init()
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}
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// A host-only variant of rust_protobuf. Refer to rust_protobuf for more details.
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func RustProtobufHostFactory() android.Module {
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module, _ := NewRustProtobuf(android.HostSupported)
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return module.Init()
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}
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func NewRustProtobuf(hod android.HostOrDeviceSupported) (*Module, *protobufDecorator) {
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protobuf := &protobufDecorator{
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BaseSourceProvider: NewSourceProvider(),
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Properties: ProtobufProperties{},
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}
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module := NewSourceProviderModule(hod, protobuf, false)
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return module, protobuf
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}
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