ref: d6ed17c60fd13c933347110c720afa09e04df1c8
dir: /hugolib/hugo_sites_build.go/
// Copyright 2019 The Hugo Authors. 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 hugolib
import (
"bytes"
"context"
"encoding/json"
"fmt"
"os"
"path/filepath"
"runtime/trace"
"strings"
"github.com/gohugoio/hugo/publisher"
"github.com/gohugoio/hugo/hugofs"
"github.com/gohugoio/hugo/common/para"
"github.com/gohugoio/hugo/config"
"github.com/gohugoio/hugo/resources/postpub"
"github.com/spf13/afero"
"github.com/gohugoio/hugo/resources/resource"
"github.com/gohugoio/hugo/output"
"github.com/pkg/errors"
"github.com/fsnotify/fsnotify"
"github.com/gohugoio/hugo/helpers"
)
// Build builds all sites. If filesystem events are provided,
// this is considered to be a potential partial rebuild.
func (h *HugoSites) Build(config BuildCfg, events ...fsnotify.Event) error {
if h.running {
// Make sure we don't trigger rebuilds in parallel.
h.runningMu.Lock()
defer h.runningMu.Unlock()
}
ctx, task := trace.NewTask(context.Background(), "Build")
defer task.End()
errCollector := h.StartErrorCollector()
errs := make(chan error)
go func(from, to chan error) {
var errors []error
i := 0
for e := range from {
i++
if i > 50 {
break
}
errors = append(errors, e)
}
to <- h.pickOneAndLogTheRest(errors)
close(to)
}(errCollector, errs)
if h.Metrics != nil {
h.Metrics.Reset()
}
h.testCounters = config.testCounters
// Need a pointer as this may be modified.
conf := &config
if conf.whatChanged == nil {
// Assume everything has changed
conf.whatChanged = &whatChanged{source: true}
}
var prepareErr error
if !config.PartialReRender {
prepare := func() error {
init := func(conf *BuildCfg) error {
for _, s := range h.Sites {
s.Deps.BuildStartListeners.Notify()
}
if len(events) > 0 {
// Rebuild
if err := h.initRebuild(conf); err != nil {
return errors.Wrap(err, "initRebuild")
}
} else {
if err := h.initSites(conf); err != nil {
return errors.Wrap(err, "initSites")
}
}
return nil
}
var err error
f := func() {
err = h.process(conf, init, events...)
}
trace.WithRegion(ctx, "process", f)
if err != nil {
return errors.Wrap(err, "process")
}
f = func() {
err = h.assemble(conf)
}
trace.WithRegion(ctx, "assemble", f)
if err != nil {
return err
}
return nil
}
f := func() {
prepareErr = prepare()
}
trace.WithRegion(ctx, "prepare", f)
if prepareErr != nil {
h.SendError(prepareErr)
}
}
if prepareErr == nil {
var err error
f := func() {
err = h.render(conf)
}
trace.WithRegion(ctx, "render", f)
if err != nil {
h.SendError(err)
}
if err = h.postProcess(); err != nil {
h.SendError(err)
}
}
if h.Metrics != nil {
var b bytes.Buffer
h.Metrics.WriteMetrics(&b)
h.Log.FEEDBACK.Printf("\nTemplate Metrics:\n\n")
h.Log.FEEDBACK.Print(b.String())
h.Log.FEEDBACK.Println()
}
select {
// Make sure the channel always gets something.
case errCollector <- nil:
default:
}
close(errCollector)
err := <-errs
if err != nil {
return err
}
if err := h.fatalErrorHandler.getErr(); err != nil {
return err
}
errorCount := h.Log.ErrorCounter.Count()
if errorCount > 0 {
return fmt.Errorf("logged %d error(s)", errorCount)
}
return nil
}
// Build lifecycle methods below.
// The order listed matches the order of execution.
func (h *HugoSites) initSites(config *BuildCfg) error {
h.reset(config)
if config.NewConfig != nil {
if err := h.createSitesFromConfig(config.NewConfig); err != nil {
return err
}
}
return nil
}
func (h *HugoSites) initRebuild(config *BuildCfg) error {
if config.NewConfig != nil {
return errors.New("rebuild does not support 'NewConfig'")
}
if config.ResetState {
return errors.New("rebuild does not support 'ResetState'")
}
if !h.running {
return errors.New("rebuild called when not in watch mode")
}
for _, s := range h.Sites {
s.resetBuildState(config.whatChanged.source)
}
h.reset(config)
h.resetLogs()
helpers.InitLoggers()
return nil
}
func (h *HugoSites) process(config *BuildCfg, init func(config *BuildCfg) error, events ...fsnotify.Event) error {
// We should probably refactor the Site and pull up most of the logic from there to here,
// but that seems like a daunting task.
// So for now, if there are more than one site (language),
// we pre-process the first one, then configure all the sites based on that.
firstSite := h.Sites[0]
if len(events) > 0 {
// This is a rebuild
return firstSite.processPartial(config, init, events)
}
return firstSite.process(*config)
}
func (h *HugoSites) assemble(bcfg *BuildCfg) error {
if len(h.Sites) > 1 {
// The first is initialized during process; initialize the rest
for _, site := range h.Sites[1:] {
if err := site.initializeSiteInfo(); err != nil {
return err
}
}
}
if !bcfg.whatChanged.source {
return nil
}
if err := h.content.AssemblePages(); err != nil {
return err
}
if err := h.createPageCollections(); err != nil {
return err
}
return nil
}
func (h *HugoSites) render(config *BuildCfg) error {
if _, err := h.init.layouts.Do(); err != nil {
return err
}
siteRenderContext := &siteRenderContext{cfg: config, multihost: h.multihost}
if !config.PartialReRender {
h.renderFormats = output.Formats{}
h.withSite(func(s *Site) error {
s.initRenderFormats()
return nil
})
for _, s := range h.Sites {
h.renderFormats = append(h.renderFormats, s.renderFormats...)
}
}
i := 0
for _, s := range h.Sites {
for siteOutIdx, renderFormat := range s.renderFormats {
siteRenderContext.outIdx = siteOutIdx
siteRenderContext.sitesOutIdx = i
i++
select {
case <-h.Done():
return nil
default:
for _, s2 := range h.Sites {
// We render site by site, but since the content is lazily rendered
// and a site can "borrow" content from other sites, every site
// needs this set.
s2.rc = &siteRenderingContext{Format: renderFormat}
if err := s2.preparePagesForRender(s == s2, siteRenderContext.sitesOutIdx); err != nil {
return err
}
}
if !config.SkipRender {
if config.PartialReRender {
if err := s.renderPages(siteRenderContext); err != nil {
return err
}
} else {
if err := s.render(siteRenderContext); err != nil {
return err
}
}
}
}
}
}
if !config.SkipRender {
if err := h.renderCrossSitesArtifacts(); err != nil {
return err
}
}
return nil
}
func (h *HugoSites) postProcess() error {
// Make sure to write any build stats to disk first so it's available
// to the post processors.
if err := h.writeBuildStats(); err != nil {
return err
}
var toPostProcess []resource.OriginProvider
for _, s := range h.Sites {
for _, v := range s.ResourceSpec.PostProcessResources {
toPostProcess = append(toPostProcess, v)
}
}
if len(toPostProcess) == 0 {
return nil
}
workers := para.New(config.GetNumWorkerMultiplier())
g, _ := workers.Start(context.Background())
handleFile := func(filename string) error {
content, err := afero.ReadFile(h.BaseFs.PublishFs, filename)
if err != nil {
return err
}
k := 0
changed := false
for {
l := bytes.Index(content[k:], []byte(postpub.PostProcessPrefix))
if l == -1 {
break
}
m := bytes.Index(content[k+l:], []byte(postpub.PostProcessSuffix)) + len(postpub.PostProcessSuffix)
low, high := k+l, k+l+m
field := content[low:high]
forward := l + m
for i, r := range toPostProcess {
if r == nil {
panic(fmt.Sprintf("resource %d to post process is nil", i+1))
}
v, ok := r.GetFieldString(string(field))
if ok {
content = append(content[:low], append([]byte(v), content[high:]...)...)
changed = true
forward = len(v)
break
}
}
k += forward
}
if changed {
return afero.WriteFile(h.BaseFs.PublishFs, filename, content, 0666)
}
return nil
}
_ = afero.Walk(h.BaseFs.PublishFs, "", func(path string, info os.FileInfo, err error) error {
if info == nil || info.IsDir() {
return nil
}
if !strings.HasSuffix(path, "html") {
return nil
}
g.Run(func() error {
return handleFile(path)
})
return nil
})
// Prepare for a new build.
for _, s := range h.Sites {
s.ResourceSpec.PostProcessResources = make(map[string]postpub.PostPublishedResource)
}
return g.Wait()
}
type publishStats struct {
CSSClasses string `json:"cssClasses"`
}
func (h *HugoSites) writeBuildStats() error {
if !h.ResourceSpec.BuildConfig.WriteStats {
return nil
}
htmlElements := &publisher.HTMLElements{}
for _, s := range h.Sites {
stats := s.publisher.PublishStats()
htmlElements.Merge(stats.HTMLElements)
}
htmlElements.Sort()
stats := publisher.PublishStats{
HTMLElements: *htmlElements,
}
js, err := json.MarshalIndent(stats, "", " ")
if err != nil {
return err
}
filename := filepath.Join(h.WorkingDir, "hugo_stats.json")
// Make sure it's always written to the OS fs.
if err := afero.WriteFile(hugofs.Os, filename, js, 0666); err != nil {
return err
}
// Write to the destination, too, if a mem fs is in play.
if h.Fs.Source != hugofs.Os {
if err := afero.WriteFile(h.Fs.Destination, filename, js, 0666); err != nil {
return err
}
}
return nil
}