ref: 5d2fceecafe182c6ddebc57475a4c1b2317e6216
dir: /resources/resource_spec.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 resources
import (
"errors"
"fmt"
"mime"
"os"
"path"
"path/filepath"
"strings"
"sync"
"github.com/gohugoio/hugo/common/herrors"
"github.com/gohugoio/hugo/config"
"github.com/gohugoio/hugo/identity"
"github.com/gohugoio/hugo/helpers"
"github.com/gohugoio/hugo/hugofs"
"github.com/gohugoio/hugo/resources/postpub"
"github.com/gohugoio/hugo/cache/filecache"
"github.com/gohugoio/hugo/common/loggers"
"github.com/gohugoio/hugo/media"
"github.com/gohugoio/hugo/output"
"github.com/gohugoio/hugo/resources/images"
"github.com/gohugoio/hugo/resources/page"
"github.com/gohugoio/hugo/resources/resource"
"github.com/gohugoio/hugo/tpl"
"github.com/spf13/afero"
)
func NewSpec(
s *helpers.PathSpec,
fileCaches filecache.Caches,
incr identity.Incrementer,
logger loggers.Logger,
errorHandler herrors.ErrorSender,
outputFormats output.Formats,
mimeTypes media.Types) (*Spec, error) {
imgConfig, err := images.DecodeConfig(s.Cfg.GetStringMap("imaging"))
if err != nil {
return nil, err
}
imaging, err := images.NewImageProcessor(imgConfig)
if err != nil {
return nil, err
}
if incr == nil {
incr = &identity.IncrementByOne{}
}
if logger == nil {
logger = loggers.NewErrorLogger()
}
permalinks, err := page.NewPermalinkExpander(s)
if err != nil {
return nil, err
}
rs := &Spec{
PathSpec: s,
Logger: logger,
ErrorSender: errorHandler,
imaging: imaging,
incr: incr,
MediaTypes: mimeTypes,
OutputFormats: outputFormats,
Permalinks: permalinks,
BuildConfig: config.DecodeBuild(s.Cfg),
FileCaches: fileCaches,
PostProcessResources: make(map[string]postpub.PostPublishedResource),
imageCache: newImageCache(
fileCaches.ImageCache(),
s,
)}
rs.ResourceCache = newResourceCache(rs)
return rs, nil
}
type Spec struct {
*helpers.PathSpec
MediaTypes media.Types
OutputFormats output.Formats
Logger loggers.Logger
ErrorSender herrors.ErrorSender
TextTemplates tpl.TemplateParseFinder
Permalinks page.PermalinkExpander
BuildConfig config.Build
// Holds default filter settings etc.
imaging *images.ImageProcessor
incr identity.Incrementer
imageCache *imageCache
ResourceCache *ResourceCache
FileCaches filecache.Caches
postProcessMu sync.RWMutex
PostProcessResources map[string]postpub.PostPublishedResource
}
func (r *Spec) New(fd ResourceSourceDescriptor) (resource.Resource, error) {
return r.newResourceFor(fd)
}
func (r *Spec) CacheStats() string {
r.imageCache.mu.RLock()
defer r.imageCache.mu.RUnlock()
s := fmt.Sprintf("Cache entries: %d", len(r.imageCache.store))
count := 0
for k := range r.imageCache.store {
if count > 5 {
break
}
s += "\n" + k
count++
}
return s
}
func (r *Spec) ClearCaches() {
r.imageCache.clear()
r.ResourceCache.clear()
}
func (r *Spec) DeleteBySubstring(s string) {
r.imageCache.deleteIfContains(s)
}
func (s *Spec) String() string {
return "spec"
}
// TODO(bep) clean up below
func (r *Spec) newGenericResource(sourceFs afero.Fs,
targetPathBuilder func() page.TargetPaths,
osFileInfo os.FileInfo,
sourceFilename,
baseFilename string,
mediaType media.Type) *genericResource {
return r.newGenericResourceWithBase(
sourceFs,
nil,
nil,
targetPathBuilder,
osFileInfo,
sourceFilename,
baseFilename,
mediaType,
)
}
func (r *Spec) newGenericResourceWithBase(
sourceFs afero.Fs,
openReadSeekerCloser resource.OpenReadSeekCloser,
targetPathBaseDirs []string,
targetPathBuilder func() page.TargetPaths,
osFileInfo os.FileInfo,
sourceFilename,
baseFilename string,
mediaType media.Type) *genericResource {
if osFileInfo != nil && osFileInfo.IsDir() {
panic(fmt.Sprintf("dirs not supported resource types: %v", osFileInfo))
}
// This value is used both to construct URLs and file paths, but start
// with a Unix-styled path.
baseFilename = helpers.ToSlashTrimLeading(baseFilename)
fpath, fname := path.Split(baseFilename)
var resourceType string
if mediaType.MainType == "image" {
resourceType = mediaType.MainType
} else {
resourceType = mediaType.SubType
}
pathDescriptor := &resourcePathDescriptor{
baseTargetPathDirs: helpers.UniqueStringsReuse(targetPathBaseDirs),
targetPathBuilder: targetPathBuilder,
relTargetDirFile: dirFile{dir: fpath, file: fname},
}
var fim hugofs.FileMetaInfo
if osFileInfo != nil {
fim = osFileInfo.(hugofs.FileMetaInfo)
}
gfi := &resourceFileInfo{
fi: fim,
openReadSeekerCloser: openReadSeekerCloser,
sourceFs: sourceFs,
sourceFilename: sourceFilename,
h: &resourceHash{},
}
g := &genericResource{
resourceFileInfo: gfi,
resourcePathDescriptor: pathDescriptor,
mediaType: mediaType,
resourceType: resourceType,
spec: r,
params: make(map[string]interface{}),
name: baseFilename,
title: baseFilename,
resourceContent: &resourceContent{},
}
return g
}
func (r *Spec) newResource(sourceFs afero.Fs, fd ResourceSourceDescriptor) (resource.Resource, error) {
fi := fd.FileInfo
var sourceFilename string
if fd.OpenReadSeekCloser != nil {
} else if fd.SourceFilename != "" {
var err error
fi, err = sourceFs.Stat(fd.SourceFilename)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
sourceFilename = fd.SourceFilename
} else {
sourceFilename = fd.SourceFile.Filename()
}
if fd.RelTargetFilename == "" {
fd.RelTargetFilename = sourceFilename
}
ext := strings.ToLower(filepath.Ext(fd.RelTargetFilename))
mimeType, found := r.MediaTypes.GetFirstBySuffix(strings.TrimPrefix(ext, "."))
// TODO(bep) we need to handle these ambigous types better, but in this context
// we most likely want the application/xml type.
if mimeType.Suffix() == "xml" && mimeType.SubType == "rss" {
mimeType, found = r.MediaTypes.GetByType("application/xml")
}
if !found {
// A fallback. Note that mime.TypeByExtension is slow by Hugo standards,
// so we should configure media types to avoid this lookup for most
// situations.
mimeStr := mime.TypeByExtension(ext)
if mimeStr != "" {
mimeType, _ = media.FromStringAndExt(mimeStr, ext)
}
}
gr := r.newGenericResourceWithBase(
sourceFs,
fd.OpenReadSeekCloser,
fd.TargetBasePaths,
fd.TargetPaths,
fi,
sourceFilename,
fd.RelTargetFilename,
mimeType)
if mimeType.MainType == "image" {
imgFormat, ok := images.ImageFormatFromExt(ext)
if ok {
ir := &imageResource{
Image: images.NewImage(imgFormat, r.imaging, nil, gr),
baseResource: gr,
}
ir.root = ir
return newResourceAdapter(gr.spec, fd.LazyPublish, ir), nil
}
}
return newResourceAdapter(gr.spec, fd.LazyPublish, gr), nil
}
func (r *Spec) newResourceFor(fd ResourceSourceDescriptor) (resource.Resource, error) {
if fd.OpenReadSeekCloser == nil {
if fd.SourceFile != nil && fd.SourceFilename != "" {
return nil, errors.New("both SourceFile and AbsSourceFilename provided")
} else if fd.SourceFile == nil && fd.SourceFilename == "" {
return nil, errors.New("either SourceFile or AbsSourceFilename must be provided")
}
}
if fd.RelTargetFilename == "" {
fd.RelTargetFilename = fd.Filename()
}
if len(fd.TargetBasePaths) == 0 {
// If not set, we publish the same resource to all hosts.
fd.TargetBasePaths = r.MultihostTargetBasePaths
}
return r.newResource(fd.Fs, fd)
}