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// Copyright 2017-present 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 output
import (
"fmt"
"path/filepath"
"strings"
"github.com/gohugoio/hugo/helpers"
)
const (
baseFileBase = "baseof"
)
var (
aceTemplateInnerMarkers = [][]byte{[]byte("= content")}
goTemplateInnerMarkers = [][]byte{[]byte("{{define"), []byte("{{ define"), []byte("{{- define"), []byte("{{-define")}
)
type TemplateNames struct {
// The name used as key in the template map. Note that this will be
// prefixed with "_text/" if it should be parsed with text/template.
Name string
OverlayFilename string
MasterFilename string
}
type TemplateLookupDescriptor struct {
// The full path to the site root.
WorkingDir string
// The path to the template relative the the base.
// I.e. shortcodes/youtube.html
RelPath string
// The template name prefix to look for.
Prefix string
// All the output formats in play. This is used to decide if text/template or
// html/template.
OutputFormats Formats
FileExists func(filename string) (bool, error)
ContainsAny func(filename string, subslices [][]byte) (bool, error)
}
func CreateTemplateNames(d TemplateLookupDescriptor) (TemplateNames, error) {
name := filepath.ToSlash(d.RelPath)
name = strings.TrimPrefix(name, "/")
if d.Prefix != "" {
name = strings.Trim(d.Prefix, "/") + "/" + name
}
var (
id TemplateNames
)
// The filename will have a suffix with an optional type indicator.
// Examples:
// index.html
// index.amp.html
// index.json
filename := filepath.Base(d.RelPath)
isPlainText := false
outputFormat, found := d.OutputFormats.FromFilename(filename)
if found && outputFormat.IsPlainText {
isPlainText = true
}
var ext, outFormat string
parts := strings.Split(filename, ".")
if len(parts) > 2 {
outFormat = parts[1]
ext = parts[2]
} else if len(parts) > 1 {
ext = parts[1]
}
filenameNoSuffix := parts[0]
id.OverlayFilename = d.RelPath
id.Name = name
if isPlainText {
id.Name = "_text/" + id.Name
}
// Ace and Go templates may have both a base and inner template.
pathDir := filepath.Dir(d.RelPath)
if ext == "amber" || strings.HasSuffix(pathDir, "partials") || strings.HasSuffix(pathDir, "shortcodes") {
// No base template support
return id, nil
}
innerMarkers := goTemplateInnerMarkers
var baseFilename string
if outFormat != "" {
baseFilename = fmt.Sprintf("%s.%s.%s", baseFileBase, outFormat, ext)
} else {
baseFilename = fmt.Sprintf("%s.%s", baseFileBase, ext)
}
if ext == "ace" {
innerMarkers = aceTemplateInnerMarkers
}
// This may be a view that shouldn't have base template
// Have to look inside it to make sure
needsBase, err := d.ContainsAny(d.RelPath, innerMarkers)
if err != nil {
return id, err
}
if needsBase {
currBaseFilename := fmt.Sprintf("%s-%s", filenameNoSuffix, baseFilename)
// Look for base template in the follwing order:
// 1. <current-path>/<template-name>-baseof.<outputFormat>(optional).<suffix>, e.g. list-baseof.<outputFormat>(optional).<suffix>.
// 2. <current-path>/baseof.<outputFormat>(optional).<suffix>
// 3. _default/<template-name>-baseof.<outputFormat>(optional).<suffix>, e.g. list-baseof.<outputFormat>(optional).<suffix>.
// 4. _default/baseof.<outputFormat>(optional).<suffix>
//
// The filesystem it looks in a a composite of the project and potential theme(s).
pathsToCheck := createPathsToCheck(pathDir, baseFilename, currBaseFilename)
// We may have language code and/or "terms" in the template name. We want the most specific,
// but need to fall back to the baseof.html or baseof.ace if needed.
// E.g. list-baseof.en.html and list-baseof.terms.en.html
// See #3893, #3856.
baseBaseFilename, currBaseBaseFilename := helpers.Filename(baseFilename), helpers.Filename(currBaseFilename)
p1, p2 := strings.Split(baseBaseFilename, "."), strings.Split(currBaseBaseFilename, ".")
if len(p1) > 0 && len(p1) == len(p2) {
for i := len(p1); i > 0; i-- {
v1, v2 := strings.Join(p1[:i], ".")+"."+ext, strings.Join(p2[:i], ".")+"."+ext
pathsToCheck = append(pathsToCheck, createPathsToCheck(pathDir, v1, v2)...)
}
}
for _, p := range pathsToCheck {
if ok, err := d.FileExists(p); err == nil && ok {
id.MasterFilename = p
break
}
}
}
return id, nil
}
func createPathsToCheck(baseTemplatedDir, baseFilename, currBaseFilename string) []string {
return []string{
filepath.Join(baseTemplatedDir, currBaseFilename),
filepath.Join(baseTemplatedDir, baseFilename),
filepath.Join("_default", currBaseFilename),
filepath.Join("_default", baseFilename),
}
}
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