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//
// Copyright (C) 2021 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 (
"path"
"android/soong/android"
"android/soong/rust/config"
)
// This module is used to compile the rust toolchain libraries
// When RUST_PREBUILTS_VERSION is set, the library will generated
// from the given Rust version.
func init() {
android.RegisterModuleType("rust_toolchain_library",
rustToolchainLibraryFactory)
android.RegisterModuleType("rust_toolchain_library_rlib",
rustToolchainLibraryRlibFactory)
android.RegisterModuleType("rust_toolchain_library_dylib",
rustToolchainLibraryDylibFactory)
}
type toolchainLibraryProperties struct {
// path to the toolchain source, relative to the top of the toolchain source
Toolchain_src *string `android:"arch_variant"`
}
type toolchainLibraryDecorator struct {
*libraryDecorator
Properties toolchainLibraryProperties
}
// rust_toolchain_library produces all rust variants.
func rustToolchainLibraryFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyRust()
return initToolchainLibrary(module, library)
}
// rust_toolchain_library_dylib produces a dylib.
func rustToolchainLibraryDylibFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyDylib()
return initToolchainLibrary(module, library)
}
// rust_toolchain_library_rlib produces an rlib.
func rustToolchainLibraryRlibFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyRlib()
return initToolchainLibrary(module, library)
}
func initToolchainLibrary(module *Module, library *libraryDecorator) android.Module {
toolchainLibrary := &toolchainLibraryDecorator{
libraryDecorator: library,
}
module.compiler = toolchainLibrary
module.AddProperties(&toolchainLibrary.Properties)
android.AddLoadHook(module, rustSetToolchainSource)
return module.Init()
}
func rustSetToolchainSource(ctx android.LoadHookContext) {
if toolchainLib, ok := ctx.Module().(*Module).compiler.(*toolchainLibraryDecorator); ok {
prefix := "linux-x86/" + GetRustPrebuiltVersion(ctx)
newSrcs := []string{path.Join(prefix, android.String(toolchainLib.Properties.Toolchain_src))}
type props struct {
Srcs []string
}
p := &props{}
p.Srcs = newSrcs
ctx.AppendProperties(p)
} else {
ctx.ModuleErrorf("Called rustSetToolchainSource on a non-Rust Module.")
}
}
// GetRustPrebuiltVersion returns the RUST_PREBUILTS_VERSION env var, or the default version if it is not defined.
func GetRustPrebuiltVersion(ctx android.LoadHookContext) string {
return ctx.AConfig().GetenvWithDefault("RUST_PREBUILTS_VERSION", config.RustDefaultVersion)
}
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