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// Copyright 2014 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 bootstrap
import (
"bufio"
"errors"
"fmt"
"io"
"os"
"path/filepath"
"runtime"
"runtime/debug"
"runtime/pprof"
"runtime/trace"
"github.com/google/blueprint"
)
type Args struct {
ModuleListFile string
OutFile string
EmptyNinjaFile bool
NoGC bool
Cpuprofile string
Memprofile string
TraceFile string
}
// RegisterGoModuleTypes adds module types to build tools written in golang
func RegisterGoModuleTypes(ctx *blueprint.Context) {
ctx.RegisterModuleType("bootstrap_go_package", newGoPackageModuleFactory())
ctx.RegisterModuleType("blueprint_go_binary", newGoBinaryModuleFactory())
}
// RunBlueprint emits `args.OutFile` (a Ninja file) and returns the list of
// its dependencies. These can be written to a `${args.OutFile}.d` file
// so that it is correctly rebuilt when needed in case Blueprint is itself
// invoked from Ninja
func RunBlueprint(args Args, stopBefore StopBefore, ctx *blueprint.Context, config interface{}) ([]string, error) {
runtime.GOMAXPROCS(runtime.NumCPU())
if args.NoGC {
debug.SetGCPercent(-1)
}
if args.Cpuprofile != "" {
f, err := os.Create(joinPath(ctx.SrcDir(), args.Cpuprofile))
if err != nil {
return nil, fmt.Errorf("error opening cpuprofile: %s", err)
}
pprof.StartCPUProfile(f)
defer f.Close()
defer pprof.StopCPUProfile()
}
if args.TraceFile != "" {
f, err := os.Create(joinPath(ctx.SrcDir(), args.TraceFile))
if err != nil {
return nil, fmt.Errorf("error opening trace: %s", err)
}
trace.Start(f)
defer f.Close()
defer trace.Stop()
}
if args.ModuleListFile == "" {
return nil, fmt.Errorf("-l <moduleListFile> is required and must be nonempty")
}
ctx.SetModuleListFile(args.ModuleListFile)
var ninjaDeps []string
ninjaDeps = append(ninjaDeps, args.ModuleListFile)
ctx.BeginEvent("list_modules")
var filesToParse []string
if f, err := ctx.ListModulePaths("."); err != nil {
return nil, fmt.Errorf("could not enumerate files: %v\n", err.Error())
} else {
filesToParse = f
}
ctx.EndEvent("list_modules")
ctx.RegisterBottomUpMutator("bootstrap_plugin_deps", pluginDeps)
ctx.RegisterSingletonType("bootstrap", newSingletonFactory(), false)
RegisterGoModuleTypes(ctx)
blueprint.RegisterPackageIncludesModuleType(ctx)
ctx.BeginEvent("parse_bp")
if blueprintFiles, errs := ctx.ParseFileList(".", filesToParse, config); len(errs) > 0 {
return nil, fatalErrors(errs)
} else {
ctx.EndEvent("parse_bp")
ninjaDeps = append(ninjaDeps, blueprintFiles...)
}
if resolvedDeps, errs := ctx.ResolveDependencies(config); len(errs) > 0 {
return nil, fatalErrors(errs)
} else {
ninjaDeps = append(ninjaDeps, resolvedDeps...)
}
if stopBefore == StopBeforePrepareBuildActions {
return ninjaDeps, nil
}
if ctx.BeforePrepareBuildActionsHook != nil {
if err := ctx.BeforePrepareBuildActionsHook(); err != nil {
return nil, fatalErrors([]error{err})
}
}
if buildActionsDeps, errs := ctx.PrepareBuildActions(config); len(errs) > 0 {
return nil, fatalErrors(errs)
} else {
ninjaDeps = append(ninjaDeps, buildActionsDeps...)
}
if stopBefore == StopBeforeWriteNinja {
return ninjaDeps, nil
}
const outFilePermissions = 0666
var out blueprint.StringWriterWriter
var f *os.File
var buf *bufio.Writer
ctx.BeginEvent("write_files")
defer ctx.EndEvent("write_files")
if args.EmptyNinjaFile {
if err := os.WriteFile(joinPath(ctx.SrcDir(), args.OutFile), []byte(nil), outFilePermissions); err != nil {
return nil, fmt.Errorf("error writing empty Ninja file: %s", err)
}
out = io.Discard.(blueprint.StringWriterWriter)
} else {
f, err := os.OpenFile(joinPath(ctx.SrcDir(), args.OutFile), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, outFilePermissions)
if err != nil {
return nil, fmt.Errorf("error opening Ninja file: %s", err)
}
defer f.Close()
buf = bufio.NewWriterSize(f, 16*1024*1024)
out = buf
}
if err := ctx.WriteBuildFile(out); err != nil {
return nil, fmt.Errorf("error writing Ninja file contents: %s", err)
}
if buf != nil {
if err := buf.Flush(); err != nil {
return nil, fmt.Errorf("error flushing Ninja file contents: %s", err)
}
}
if f != nil {
if err := f.Close(); err != nil {
return nil, fmt.Errorf("error closing Ninja file: %s", err)
}
}
if args.Memprofile != "" {
f, err := os.Create(joinPath(ctx.SrcDir(), args.Memprofile))
if err != nil {
return nil, fmt.Errorf("error opening memprofile: %s", err)
}
defer f.Close()
pprof.WriteHeapProfile(f)
}
return ninjaDeps, nil
}
func fatalErrors(errs []error) error {
red := "\x1b[31m"
unred := "\x1b[0m"
for _, err := range errs {
switch err := err.(type) {
case *blueprint.BlueprintError,
*blueprint.ModuleError,
*blueprint.PropertyError:
fmt.Printf("%serror:%s %s\n", red, unred, err.Error())
default:
fmt.Printf("%sinternal error:%s %s\n", red, unred, err)
}
}
return errors.New("fatal errors encountered")
}
func joinPath(base, path string) string {
if filepath.IsAbs(path) {
return path
}
return filepath.Join(base, path)
}
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