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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/spf13/hugo/helpers"
)
const baseFileBase = "baseof"
var (
aceTemplateInnerMarkers = [][]byte{[]byte("= content")}
goTemplateInnerMarkers = [][]byte{[]byte("{{define"), []byte("{{ define")}
)
type TemplateNames struct {
Name string
OverlayFilename string
MasterFilename string
}
type TemplateLookupDescriptor struct {
// The full path to the site or theme root.
WorkingDir string
// Main project layout dir, defaults to "layouts"
LayoutDir string
// The path to the template relative the the base.
// I.e. shortcodes/youtube.html
RelPath string
// The template name prefix to look for, i.e. "theme".
Prefix string
// The theme name if active.
Theme string
FileExists func(filename string) (bool, error)
ContainsAny func(filename string, subslices [][]byte) (bool, error)
}
func CreateTemplateNames(d TemplateLookupDescriptor) (TemplateNames, error) {
var id TemplateNames
name := filepath.ToSlash(d.RelPath)
if d.Prefix != "" {
name = strings.Trim(d.Prefix, "/") + "/" + name
}
baseLayoutDir := filepath.Join(d.WorkingDir, d.LayoutDir)
fullPath := filepath.Join(baseLayoutDir, d.RelPath)
// The filename will have a suffix with an optional type indicator.
// Examples:
// index.html
// index.amp.html
// index.json
filename := filepath.Base(d.RelPath)
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 = fullPath
id.Name = name
// Ace and Go templates may have both a base and inner template.
pathDir := filepath.Dir(fullPath)
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(fullPath, innerMarkers)
if err != nil {
return id, err
}
if needsBase {
currBaseFilename := fmt.Sprintf("%s-%s", filenameNoSuffix, baseFilename)
templateDir := filepath.Dir(fullPath)
themeDir := filepath.Join(d.WorkingDir, d.Theme)
baseTemplatedDir := strings.TrimPrefix(templateDir, baseLayoutDir)
baseTemplatedDir = strings.TrimPrefix(baseTemplatedDir, helpers.FilePathSeparator)
// 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>
// For each of the steps above, it will first look in the project, then, if theme is set,
// in the theme's layouts folder.
// Also note that the <current-path> may be both the project's layout folder and the theme's.
pairsToCheck := [][]string{
{baseTemplatedDir, currBaseFilename},
{baseTemplatedDir, baseFilename},
{"_default", currBaseFilename},
{"_default", baseFilename},
}
Loop:
for _, pair := range pairsToCheck {
pathsToCheck := basePathsToCheck(pair, baseLayoutDir, themeDir)
for _, pathToCheck := range pathsToCheck {
if ok, err := d.FileExists(pathToCheck); err == nil && ok {
id.MasterFilename = pathToCheck
break Loop
}
}
}
}
return id, nil
}
func basePathsToCheck(path []string, layoutDir, themeDir string) []string {
// Always look in the project.
pathsToCheck := []string{filepath.Join((append([]string{layoutDir}, path...))...)}
// May have a theme
if themeDir != "" {
pathsToCheck = append(pathsToCheck, filepath.Join((append([]string{themeDir, "layouts"}, path...))...))
}
return pathsToCheck
}
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