ref: 82a182e52c4165b4f51d0cc8ef0f21df5d628c69
dir: /hugolib/site_render.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 (
"fmt"
"path"
"strings"
"sync"
"github.com/gohugoio/hugo/tpl"
"github.com/gohugoio/hugo/config"
"github.com/gohugoio/hugo/output"
"github.com/pkg/errors"
"github.com/gohugoio/hugo/resources/page"
"github.com/gohugoio/hugo/resources/page/pagemeta"
)
type siteRenderContext struct {
cfg *BuildCfg
// Zero based index for all output formats combined.
sitesOutIdx int
// Zero based index of the output formats configured within a Site.
// Note that these outputs are sorted.
outIdx int
multihost bool
}
// Whether to render 404.html, robotsTXT.txt which usually is rendered
// once only in the site root.
func (s siteRenderContext) renderSingletonPages() bool {
if s.multihost {
// 1 per site
return s.outIdx == 0
}
// 1 for all sites
return s.sitesOutIdx == 0
}
// renderPages renders pages each corresponding to a markdown file.
// TODO(bep np doc
func (s *Site) renderPages(ctx *siteRenderContext) error {
numWorkers := config.GetNumWorkerMultiplier()
results := make(chan error)
pages := make(chan *pageState, numWorkers) // buffered for performance
errs := make(chan error)
go s.errorCollator(results, errs)
wg := &sync.WaitGroup{}
for i := 0; i < numWorkers; i++ {
wg.Add(1)
go pageRenderer(ctx, s, pages, results, wg)
}
cfg := ctx.cfg
s.pageMap.pageTrees.Walk(func(ss string, n *contentNode) bool {
if cfg.shouldRender(n.p) {
select {
case <-s.h.Done():
return true
default:
pages <- n.p
}
}
return false
})
close(pages)
wg.Wait()
close(results)
err := <-errs
if err != nil {
return errors.Wrap(err, "failed to render pages")
}
return nil
}
func pageRenderer(
ctx *siteRenderContext,
s *Site,
pages <-chan *pageState,
results chan<- error,
wg *sync.WaitGroup) {
defer wg.Done()
for p := range pages {
if p.m.buildConfig.PublishResources {
if err := p.renderResources(); err != nil {
s.SendError(p.errorf(err, "failed to render page resources"))
continue
}
}
if !p.render {
// Nothing more to do for this page.
continue
}
templ, found, err := p.resolveTemplate()
if err != nil {
s.SendError(p.errorf(err, "failed to resolve template"))
continue
}
if !found {
s.logMissingLayout("", p.Layout(), p.Kind(), p.f.Name)
continue
}
targetPath := p.targetPaths().TargetFilename
if err := s.renderAndWritePage(&s.PathSpec.ProcessingStats.Pages, "page "+p.Title(), targetPath, p, templ); err != nil {
results <- err
}
if p.paginator != nil && p.paginator.current != nil {
if err := s.renderPaginator(p, templ); err != nil {
results <- err
}
}
}
}
func (s *Site) logMissingLayout(name, layout, kind, outputFormat string) {
log := s.Log.Warn()
if name != "" && infoOnMissingLayout[name] {
log = s.Log.Info()
}
errMsg := "You should create a template file which matches Hugo Layouts Lookup Rules for this combination."
var args []interface{}
msg := "found no layout file for"
if outputFormat != "" {
msg += " %q"
args = append(args, outputFormat)
}
if layout != "" {
msg += " for layout %q"
args = append(args, layout)
}
if kind != "" {
msg += " for kind %q"
args = append(args, kind)
}
if name != "" {
msg += " for %q"
args = append(args, name)
}
msg += ": " + errMsg
log.Printf(msg, args...)
}
// renderPaginator must be run after the owning Page has been rendered.
func (s *Site) renderPaginator(p *pageState, templ tpl.Template) error {
paginatePath := s.Cfg.GetString("paginatePath")
d := p.targetPathDescriptor
f := p.s.rc.Format
d.Type = f
if p.paginator.current == nil || p.paginator.current != p.paginator.current.First() {
panic(fmt.Sprintf("invalid paginator state for %q", p.pathOrTitle()))
}
if f.IsHTML {
// Write alias for page 1
d.Addends = fmt.Sprintf("/%s/%d", paginatePath, 1)
targetPaths := page.CreateTargetPaths(d)
if err := s.writeDestAlias(targetPaths.TargetFilename, p.Permalink(), f, nil); err != nil {
return err
}
}
// Render pages for the rest
for current := p.paginator.current.Next(); current != nil; current = current.Next() {
p.paginator.current = current
d.Addends = fmt.Sprintf("/%s/%d", paginatePath, current.PageNumber())
targetPaths := page.CreateTargetPaths(d)
if err := s.renderAndWritePage(
&s.PathSpec.ProcessingStats.PaginatorPages,
p.Title(),
targetPaths.TargetFilename, p, templ); err != nil {
return err
}
}
return nil
}
func (s *Site) render404() error {
p, err := newPageStandalone(&pageMeta{
s: s,
kind: kind404,
urlPaths: pagemeta.URLPath{
URL: "404.html",
},
},
output.HTMLFormat,
)
if err != nil {
return err
}
if !p.render {
return nil
}
var d output.LayoutDescriptor
d.Kind = kind404
templ, found, err := s.Tmpl().LookupLayout(d, output.HTMLFormat)
if err != nil {
return err
}
if !found {
return nil
}
targetPath := p.targetPaths().TargetFilename
if targetPath == "" {
return errors.New("failed to create targetPath for 404 page")
}
return s.renderAndWritePage(&s.PathSpec.ProcessingStats.Pages, "404 page", targetPath, p, templ)
}
func (s *Site) renderSitemap() error {
p, err := newPageStandalone(&pageMeta{
s: s,
kind: kindSitemap,
urlPaths: pagemeta.URLPath{
URL: s.siteCfg.sitemap.Filename,
}},
output.HTMLFormat,
)
if err != nil {
return err
}
if !p.render {
return nil
}
targetPath := p.targetPaths().TargetFilename
if targetPath == "" {
return errors.New("failed to create targetPath for sitemap")
}
templ := s.lookupLayouts("sitemap.xml", "_default/sitemap.xml", "_internal/_default/sitemap.xml")
return s.renderAndWriteXML(&s.PathSpec.ProcessingStats.Sitemaps, "sitemap", targetPath, p, templ)
}
func (s *Site) renderRobotsTXT() error {
if !s.Cfg.GetBool("enableRobotsTXT") {
return nil
}
p, err := newPageStandalone(&pageMeta{
s: s,
kind: kindRobotsTXT,
urlPaths: pagemeta.URLPath{
URL: "robots.txt",
},
},
output.RobotsTxtFormat)
if err != nil {
return err
}
if !p.render {
return nil
}
templ := s.lookupLayouts("robots.txt", "_default/robots.txt", "_internal/_default/robots.txt")
return s.renderAndWritePage(&s.PathSpec.ProcessingStats.Pages, "Robots Txt", p.targetPaths().TargetFilename, p, templ)
}
// renderAliases renders shell pages that simply have a redirect in the header.
func (s *Site) renderAliases() error {
var err error
s.pageMap.pageTrees.WalkLinkable(func(ss string, n *contentNode) bool {
p := n.p
if len(p.Aliases()) == 0 {
return false
}
pathSeen := make(map[string]bool)
for _, of := range p.OutputFormats() {
if !of.Format.IsHTML {
continue
}
f := of.Format
if pathSeen[f.Path] {
continue
}
pathSeen[f.Path] = true
plink := of.Permalink()
for _, a := range p.Aliases() {
isRelative := !strings.HasPrefix(a, "/")
if isRelative {
// Make alias relative, where "." will be on the
// same directory level as the current page.
basePath := path.Join(p.targetPaths().SubResourceBaseLink, "..")
a = path.Join(basePath, a)
} else {
// Make sure AMP and similar doesn't clash with regular aliases.
a = path.Join(f.Path, a)
}
if s.UglyURLs && !strings.HasSuffix(a, ".html") {
a += ".html"
}
lang := p.Language().Lang
if s.h.multihost && !strings.HasPrefix(a, "/"+lang) {
// These need to be in its language root.
a = path.Join(lang, a)
}
err = s.writeDestAlias(a, plink, f, p)
if err != nil {
return true
}
}
}
return false
})
return err
}
// renderMainLanguageRedirect creates a redirect to the main language home,
// depending on if it lives in sub folder (e.g. /en) or not.
func (s *Site) renderMainLanguageRedirect() error {
if !s.h.multilingual.enabled() || s.h.IsMultihost() {
// No need for a redirect
return nil
}
html, found := s.outputFormatsConfig.GetByName("HTML")
if found {
mainLang := s.h.multilingual.DefaultLang
if s.Info.defaultContentLanguageInSubdir {
mainLangURL := s.PathSpec.AbsURL(mainLang.Lang+"/", false)
s.Log.Debug().Printf("Write redirect to main language %s: %s", mainLang, mainLangURL)
if err := s.publishDestAlias(true, "/", mainLangURL, html, nil); err != nil {
return err
}
} else {
mainLangURL := s.PathSpec.AbsURL("", false)
s.Log.Debug().Printf("Write redirect to main language %s: %s", mainLang, mainLangURL)
if err := s.publishDestAlias(true, mainLang.Lang, mainLangURL, html, nil); err != nil {
return err
}
}
}
return nil
}