platform_build_soong/rust/source_provider.go
Chih-Hung Hsieh c49649c059 Use protobuf-codegen default and add mod_stem.rs
* Upgrade to new protobuf-codegen; use its standard
  default output without local change.
* Allow a sourceProvider to have multiple output files.
  For a stem.proto file, output stem.rs and mod_stem.rs.
* New protobuf-codegen option gen_mod_rs always generates
  output file named "mod.rs". To generate multiple .proto
  files into the same output directory, we need to rename
  mod.rs to mod_<stem>.rs.
* Instead of using the gen_mod_rs option and renaming mod.rs
  to mod_<stem>.rs, we generate the same mod_<stem>.rs
  directly with a simple printf command.

Bug: 170256643
Test: atest -c --host --include-subdirs external/crosvm
Change-Id: Ia09e41029099a6de4d35c96dbabd9ba5514c9019
2020-10-09 13:38:37 -07:00

102 lines
3 KiB
Go

// Copyright 2020 The Android Open Source Project
//
// 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 rust
import (
"android/soong/android"
)
type SourceProviderProperties struct {
// filename for the generated source file (<source_stem>.rs). This field is required.
// The inherited "stem" property sets the output filename for the generated library variants only.
Source_stem *string `android:"arch_variant"`
// crate name, used for the library variant of this source provider. See additional details in rust_library.
Crate_name string `android:"arch_variant"`
}
type BaseSourceProvider struct {
Properties SourceProviderProperties
OutputFiles android.Paths
subAndroidMkOnce map[SubAndroidMkProvider]bool
subName string
}
var _ SourceProvider = (*BaseSourceProvider)(nil)
type SourceProvider interface {
GenerateSource(ctx ModuleContext, deps PathDeps) android.Path
Srcs() android.Paths
SourceProviderProps() []interface{}
SourceProviderDeps(ctx DepsContext, deps Deps) Deps
setSubName(subName string)
setOutputFiles(outputFiles android.Paths)
}
func (sp *BaseSourceProvider) Srcs() android.Paths {
return sp.OutputFiles
}
func (sp *BaseSourceProvider) GenerateSource(ctx ModuleContext, deps PathDeps) android.Path {
panic("BaseSourceProviderModule does not implement GenerateSource()")
}
func (sp *BaseSourceProvider) SourceProviderProps() []interface{} {
return []interface{}{&sp.Properties}
}
func NewSourceProvider() *BaseSourceProvider {
return &BaseSourceProvider{
Properties: SourceProviderProperties{},
}
}
func NewSourceProviderModule(hod android.HostOrDeviceSupported, sourceProvider SourceProvider, enableLints bool) *Module {
_, library := NewRustLibrary(hod)
library.BuildOnlyRust()
library.sourceProvider = sourceProvider
module := newModule(hod, android.MultilibBoth)
module.sourceProvider = sourceProvider
module.compiler = library
if !enableLints {
library.disableLints()
module.disableClippy()
}
return module
}
func (sp *BaseSourceProvider) getStem(ctx android.ModuleContext) string {
if String(sp.Properties.Source_stem) == "" {
ctx.PropertyErrorf("source_stem",
"source_stem property is undefined but required for rust_bindgen modules")
}
return String(sp.Properties.Source_stem)
}
func (sp *BaseSourceProvider) SourceProviderDeps(ctx DepsContext, deps Deps) Deps {
return deps
}
func (sp *BaseSourceProvider) setSubName(subName string) {
sp.subName = subName
}
func (sp *BaseSourceProvider) setOutputFiles(outputFiles android.Paths) {
sp.OutputFiles = outputFiles
}