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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"
"flag"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"runtime/debug"
"runtime/pprof"
"runtime/trace"
"github.com/google/blueprint"
"github.com/google/blueprint/deptools"
)
var (
outFile string
globFile string
depFile string
docFile string
cpuprofile string
memprofile string
traceFile string
runGoTests bool
useValidations bool
noGC bool
emptyNinjaFile bool
BuildDir string
ModuleListFile string
NinjaBuildDir string
SrcDir string
absSrcDir string
)
func init() {
flag.StringVar(&outFile, "o", "build.ninja", "the Ninja file to output")
flag.StringVar(&globFile, "globFile", "build-globs.ninja", "the Ninja file of globs to output")
flag.StringVar(&BuildDir, "b", ".", "the build output directory")
flag.StringVar(&NinjaBuildDir, "n", "", "the ninja builddir directory")
flag.StringVar(&depFile, "d", "", "the dependency file to output")
flag.StringVar(&docFile, "docs", "", "build documentation file to output")
flag.StringVar(&cpuprofile, "cpuprofile", "", "write cpu profile to file")
flag.StringVar(&traceFile, "trace", "", "write trace to file")
flag.StringVar(&memprofile, "memprofile", "", "write memory profile to file")
flag.BoolVar(&noGC, "nogc", false, "turn off GC for debugging")
flag.BoolVar(&runGoTests, "t", false, "build and run go tests during bootstrap")
flag.BoolVar(&useValidations, "use-validations", false, "use validations to depend on go tests")
flag.StringVar(&ModuleListFile, "l", "", "file that lists filepaths to parse")
flag.BoolVar(&emptyNinjaFile, "empty-ninja-file", false, "write out a 0-byte ninja file")
}
func Main(ctx *blueprint.Context, config interface{}, extraNinjaFileDeps ...string) {
if !flag.Parsed() {
flag.Parse()
}
runtime.GOMAXPROCS(runtime.NumCPU())
if noGC {
debug.SetGCPercent(-1)
}
absSrcDir = ctx.SrcDir()
if cpuprofile != "" {
f, err := os.Create(absolutePath(cpuprofile))
if err != nil {
fatalf("error opening cpuprofile: %s", err)
}
pprof.StartCPUProfile(f)
defer f.Close()
defer pprof.StopCPUProfile()
}
if traceFile != "" {
f, err := os.Create(absolutePath(traceFile))
if err != nil {
fatalf("error opening trace: %s", err)
}
trace.Start(f)
defer f.Close()
defer trace.Stop()
}
if flag.NArg() != 1 {
fatalf("no Blueprints file specified")
}
SrcDir = filepath.Dir(flag.Arg(0))
if ModuleListFile != "" {
ctx.SetModuleListFile(ModuleListFile)
extraNinjaFileDeps = append(extraNinjaFileDeps, ModuleListFile)
} else {
fatalf("-l <moduleListFile> is required and must be nonempty")
}
filesToParse, err := ctx.ListModulePaths(SrcDir)
if err != nil {
fatalf("could not enumerate files: %v\n", err.Error())
}
if NinjaBuildDir == "" {
NinjaBuildDir = BuildDir
}
stage := StageMain
if c, ok := config.(ConfigInterface); ok {
if c.GeneratingPrimaryBuilder() {
stage = StagePrimary
}
}
bootstrapConfig := &Config{
stage: stage,
topLevelBlueprintsFile: flag.Arg(0),
emptyNinjaFile: emptyNinjaFile,
runGoTests: runGoTests,
useValidations: useValidations,
moduleListFile: ModuleListFile,
}
ctx.RegisterBottomUpMutator("bootstrap_plugin_deps", pluginDeps)
ctx.RegisterModuleType("bootstrap_go_package", newGoPackageModuleFactory(bootstrapConfig))
ctx.RegisterModuleType("bootstrap_go_binary", newGoBinaryModuleFactory(bootstrapConfig, false))
ctx.RegisterModuleType("blueprint_go_binary", newGoBinaryModuleFactory(bootstrapConfig, true))
ctx.RegisterSingletonType("bootstrap", newSingletonFactory(bootstrapConfig))
ctx.RegisterSingletonType("glob", globSingletonFactory(ctx))
deps, errs := ctx.ParseFileList(filepath.Dir(bootstrapConfig.topLevelBlueprintsFile), filesToParse, config)
if len(errs) > 0 {
fatalErrors(errs)
}
// Add extra ninja file dependencies
deps = append(deps, extraNinjaFileDeps...)
extraDeps, errs := ctx.ResolveDependencies(config)
if len(errs) > 0 {
fatalErrors(errs)
}
deps = append(deps, extraDeps...)
if docFile != "" {
err := writeDocs(ctx, absolutePath(docFile))
if err != nil {
fatalErrors([]error{err})
}
return
}
if c, ok := config.(ConfigStopBefore); ok {
if c.StopBefore() == StopBeforePrepareBuildActions {
return
}
}
extraDeps, errs = ctx.PrepareBuildActions(config)
if len(errs) > 0 {
fatalErrors(errs)
}
deps = append(deps, extraDeps...)
const outFilePermissions = 0666
var out io.Writer
var f *os.File
var buf *bufio.Writer
if emptyNinjaFile {
if err := ioutil.WriteFile(absolutePath(outFile), []byte(nil), outFilePermissions); err != nil {
fatalf("error writing empty Ninja file: %s", err)
}
}
if stage != StageMain || !emptyNinjaFile {
f, err = os.OpenFile(absolutePath(outFile), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, outFilePermissions)
if err != nil {
fatalf("error opening Ninja file: %s", err)
}
buf = bufio.NewWriter(f)
out = buf
} else {
out = ioutil.Discard
}
if globFile != "" {
buffer, errs := generateGlobNinjaFile(ctx.Globs)
if len(errs) > 0 {
fatalErrors(errs)
}
err = ioutil.WriteFile(absolutePath(globFile), buffer, outFilePermissions)
if err != nil {
fatalf("error writing %s: %s", globFile, err)
}
}
if depFile != "" {
err := deptools.WriteDepFile(absolutePath(depFile), outFile, deps)
if err != nil {
fatalf("error writing depfile: %s", err)
}
}
err = ctx.WriteBuildFile(out)
if err != nil {
fatalf("error writing Ninja file contents: %s", err)
}
if buf != nil {
err = buf.Flush()
if err != nil {
fatalf("error flushing Ninja file contents: %s", err)
}
}
if f != nil {
err = f.Close()
if err != nil {
fatalf("error closing Ninja file: %s", err)
}
}
if c, ok := config.(ConfigRemoveAbandonedFilesUnder); ok {
under, except := c.RemoveAbandonedFilesUnder()
err := removeAbandonedFilesUnder(ctx, bootstrapConfig, SrcDir, under, except)
if err != nil {
fatalf("error removing abandoned files: %s", err)
}
}
if memprofile != "" {
f, err := os.Create(absolutePath(memprofile))
if err != nil {
fatalf("error opening memprofile: %s", err)
}
defer f.Close()
pprof.WriteHeapProfile(f)
}
}
func fatalf(format string, args ...interface{}) {
fmt.Printf(format, args...)
fmt.Print("\n")
os.Exit(1)
}
func fatalErrors(errs []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)
}
}
os.Exit(1)
}
func absolutePath(path string) string {
if filepath.IsAbs(path) {
return path
}
return filepath.Join(absSrcDir, path)
}
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