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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 (
"bytes"
"flag"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"runtime/debug"
"runtime/pprof"
"runtime/trace"
"github.com/google/blueprint"
"github.com/google/blueprint/deptools"
)
var (
outFile string
depFile string
docFile string
cpuprofile string
memprofile string
traceFile string
runGoTests bool
noGC bool
BuildDir string
SrcDir string
)
func init() {
flag.StringVar(&outFile, "o", "build.ninja", "the Ninja file to output")
flag.StringVar(&BuildDir, "b", ".", "the build output 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")
}
func Main(ctx *blueprint.Context, config interface{}, extraNinjaFileDeps ...string) {
if !flag.Parsed() {
flag.Parse()
}
runtime.GOMAXPROCS(runtime.NumCPU())
if noGC {
debug.SetGCPercent(-1)
}
if cpuprofile != "" {
f, err := os.Create(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(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))
stage := StageMain
if c, ok := config.(ConfigInterface); ok {
if c.GeneratingPrimaryBuilder() {
stage = StagePrimary
}
}
bootstrapConfig := &Config{
stage: stage,
topLevelBlueprintsFile: flag.Arg(0),
runGoTests: runGoTests,
}
ctx.RegisterBottomUpMutator("bootstrap_plugin_deps", pluginDeps)
ctx.RegisterModuleType("bootstrap_go_package", newGoPackageModuleFactory(bootstrapConfig))
ctx.RegisterModuleType("bootstrap_go_binary", newGoBinaryModuleFactory(bootstrapConfig, StagePrimary))
ctx.RegisterModuleType("blueprint_go_binary", newGoBinaryModuleFactory(bootstrapConfig, StageMain))
ctx.RegisterTopDownMutator("bootstrap_stage", propagateStageBootstrap)
ctx.RegisterSingletonType("bootstrap", newSingletonFactory(bootstrapConfig))
ctx.RegisterSingletonType("glob", globSingletonFactory(ctx))
deps, errs := ctx.ParseBlueprintsFiles(bootstrapConfig.topLevelBlueprintsFile)
if len(errs) > 0 {
fatalErrors(errs)
}
// Add extra ninja file dependencies
deps = append(deps, extraNinjaFileDeps...)
errs = ctx.ResolveDependencies(config)
if len(errs) > 0 {
fatalErrors(errs)
}
if docFile != "" {
err := writeDocs(ctx, filepath.Dir(bootstrapConfig.topLevelBlueprintsFile), docFile)
if err != nil {
fatalErrors([]error{err})
}
return
}
extraDeps, errs := ctx.PrepareBuildActions(config)
if len(errs) > 0 {
fatalErrors(errs)
}
deps = append(deps, extraDeps...)
buf := bytes.NewBuffer(nil)
err := ctx.WriteBuildFile(buf)
if err != nil {
fatalf("error generating Ninja file contents: %s", err)
}
const outFilePermissions = 0666
err = ioutil.WriteFile(outFile, buf.Bytes(), outFilePermissions)
if err != nil {
fatalf("error writing %s: %s", outFile, err)
}
if depFile != "" {
err := deptools.WriteDepFile(depFile, outFile, deps)
if err != nil {
fatalf("error writing depfile: %s", err)
}
}
if c, ok := config.(ConfigRemoveAbandonedFiles); !ok || c.RemoveAbandonedFiles() {
err := removeAbandonedFiles(ctx, bootstrapConfig, SrcDir)
if err != nil {
fatalf("error removing abandoned files: %s", err)
}
}
if memprofile != "" {
f, err := os.Create(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)
}
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