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// Copyright 2019 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"
"android/soong/bazel"
"fmt"
)
func init() {
android.RegisterModuleType("rust_proc_macro", ProcMacroFactory)
}
type ProcMacroCompilerProperties struct {
}
type procMacroDecorator struct {
*baseCompiler
*flagExporter
Properties ProcMacroCompilerProperties
}
type procMacroInterface interface {
ProcMacro() bool
}
var _ compiler = (*procMacroDecorator)(nil)
var _ exportedFlagsProducer = (*procMacroDecorator)(nil)
func ProcMacroFactory() android.Module {
module, _ := NewProcMacro(android.HostSupportedNoCross)
return module.Init()
}
func NewProcMacro(hod android.HostOrDeviceSupported) (*Module, *procMacroDecorator) {
module := newModule(hod, android.MultilibFirst)
android.InitBazelModule(module)
procMacro := &procMacroDecorator{
baseCompiler: NewBaseCompiler("lib", "lib64", InstallInSystem),
flagExporter: NewFlagExporter(),
}
// Don't sanitize procMacros
module.sanitize = nil
module.compiler = procMacro
return module, procMacro
}
func (procMacro *procMacroDecorator) compilerProps() []interface{} {
return append(procMacro.baseCompiler.compilerProps(),
&procMacro.Properties)
}
func (procMacro *procMacroDecorator) compilerFlags(ctx ModuleContext, flags Flags) Flags {
flags = procMacro.baseCompiler.compilerFlags(ctx, flags)
flags.RustFlags = append(flags.RustFlags, "--extern proc_macro")
return flags
}
func (procMacro *procMacroDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) buildOutput {
fileName := procMacro.getStem(ctx) + ctx.toolchain().ProcMacroSuffix()
outputFile := android.PathForModuleOut(ctx, fileName)
srcPath, _ := srcPathFromModuleSrcs(ctx, procMacro.baseCompiler.Properties.Srcs)
ret := TransformSrctoProcMacro(ctx, srcPath, deps, flags, outputFile)
procMacro.baseCompiler.unstrippedOutputFile = outputFile
return ret
}
func (procMacro *procMacroDecorator) getStem(ctx ModuleContext) string {
stem := procMacro.baseCompiler.getStemWithoutSuffix(ctx)
validateLibraryStem(ctx, stem, procMacro.crateName())
return stem + String(procMacro.baseCompiler.Properties.Suffix)
}
func (procMacro *procMacroDecorator) autoDep(ctx android.BottomUpMutatorContext) autoDep {
return rlibAutoDep
}
func (procMacro *procMacroDecorator) ProcMacro() bool {
return true
}
func (procMacro *procMacroDecorator) everInstallable() bool {
// Proc_macros are never installed
return false
}
type procMacroAttributes struct {
Srcs bazel.LabelListAttribute
Compile_data bazel.LabelListAttribute
Crate_name bazel.StringAttribute
Edition bazel.StringAttribute
Crate_features bazel.StringListAttribute
Deps bazel.LabelListAttribute
Rustc_flags bazel.StringListAttribute
}
func procMacroBp2build(ctx android.TopDownMutatorContext, m *Module) {
procMacro := m.compiler.(*procMacroDecorator)
srcs, compileData := srcsAndCompileDataAttrs(ctx, *procMacro.baseCompiler)
deps := android.BazelLabelForModuleDeps(ctx, append(
procMacro.baseCompiler.Properties.Rustlibs,
procMacro.baseCompiler.Properties.Rlibs...,
))
var rustcFLags []string
for _, cfg := range procMacro.baseCompiler.Properties.Cfgs {
rustcFLags = append(rustcFLags, fmt.Sprintf("--cfg=%s", cfg))
}
attrs := &procMacroAttributes{
Srcs: bazel.MakeLabelListAttribute(
srcs,
),
Compile_data: bazel.MakeLabelListAttribute(
compileData,
),
Crate_name: bazel.StringAttribute{
Value: &procMacro.baseCompiler.Properties.Crate_name,
},
Edition: bazel.StringAttribute{
Value: procMacro.baseCompiler.Properties.Edition,
},
Crate_features: bazel.StringListAttribute{
Value: procMacro.baseCompiler.Properties.Features,
},
Deps: bazel.MakeLabelListAttribute(
deps,
),
Rustc_flags: bazel.StringListAttribute{
Value: append(
rustcFLags,
procMacro.baseCompiler.Properties.Flags...,
),
},
}
// m.IsConvertedByBp2build()
ctx.CreateBazelTargetModule(
bazel.BazelTargetModuleProperties{
Rule_class: "rust_proc_macro",
Bzl_load_location: "@rules_rust//rust:defs.bzl",
},
android.CommonAttributes{
Name: m.Name(),
},
attrs,
)
}
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