mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
532 lines
13 KiB
Go
532 lines
13 KiB
Go
// Copyright 2016 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package commands
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import (
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"bytes"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"time"
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"github.com/spf13/cast"
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"github.com/spf13/cobra"
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"github.com/spf13/hugo/helpers"
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"github.com/spf13/hugo/hugofs"
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"github.com/spf13/hugo/hugolib"
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"github.com/spf13/hugo/parser"
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jww "github.com/spf13/jwalterweatherman"
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)
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func init() {
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importCmd.AddCommand(importJekyllCmd)
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}
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var importCmd = &cobra.Command{
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Use: "import",
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Short: "Import your site from others.",
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Long: `Import your site from other web site generators like Jekyll.
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Import requires a subcommand, e.g. ` + "`hugo import jekyll jekyll_root_path target_path`.",
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RunE: nil,
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}
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var importJekyllCmd = &cobra.Command{
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Use: "jekyll",
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Short: "hugo import from Jekyll",
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Long: `hugo import from Jekyll.
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Import from Jekyll requires two paths, e.g. ` + "`hugo import jekyll jekyll_root_path target_path`.",
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RunE: importFromJekyll,
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}
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func init() {
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importJekyllCmd.Flags().Bool("force", false, "Allow import into non-empty target directory")
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}
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func importFromJekyll(cmd *cobra.Command, args []string) error {
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jww.SetLogThreshold(jww.LevelTrace)
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jww.SetStdoutThreshold(jww.LevelWarn)
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if len(args) < 2 {
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return newUserError(`Import from Jekyll requires two paths, e.g. ` + "`hugo import jekyll jekyll_root_path target_path`.")
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}
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jekyllRoot, err := filepath.Abs(filepath.Clean(args[0]))
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if err != nil {
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return newUserError("Path error:", args[0])
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}
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targetDir, err := filepath.Abs(filepath.Clean(args[1]))
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if err != nil {
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return newUserError("Path error:", args[1])
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}
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jww.INFO.Println("Import Jekyll from:", jekyllRoot, "to:", targetDir)
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if strings.HasPrefix(filepath.Dir(targetDir), jekyllRoot) {
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return newUserError("Target path should not be inside the Jekyll root, aborting.")
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}
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forceImport, _ := cmd.Flags().GetBool("force")
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if err := createSiteFromJekyll(jekyllRoot, targetDir, forceImport); err != nil {
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return newUserError(err)
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}
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fmt.Println("Importing...")
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fileCount := 0
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callback := func(path string, fi os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if fi.IsDir() {
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return nil
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}
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relPath, err := filepath.Rel(jekyllRoot, path)
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if err != nil {
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return newUserError("Get rel path error:", path)
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}
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relPath = filepath.ToSlash(relPath)
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draft := false
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switch {
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case strings.HasPrefix(relPath, "_posts/"):
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relPath = "content/post" + relPath[len("_posts"):]
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case strings.HasPrefix(relPath, "_drafts/"):
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relPath = "content/draft" + relPath[len("_drafts"):]
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draft = true
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default:
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return nil
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}
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fileCount++
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return convertJekyllPost(path, relPath, targetDir, draft)
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}
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err = helpers.SymbolicWalk(hugofs.Os(), jekyllRoot, callback)
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if err != nil {
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return err
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}
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fmt.Println("Congratulations!", fileCount, "post(s) imported!")
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fmt.Println("Now, start Hugo by yourself:\n" +
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"$ git clone https://github.com/spf13/herring-cove.git " + args[1] + "/themes/herring-cove")
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fmt.Println("$ cd " + args[1] + "\n$ hugo server --theme=herring-cove")
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return nil
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}
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// TODO: Consider calling doNewSite() instead?
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func createSiteFromJekyll(jekyllRoot, targetDir string, force bool) error {
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fs := hugofs.Source()
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if exists, _ := helpers.Exists(targetDir, fs); exists {
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if isDir, _ := helpers.IsDir(targetDir, fs); !isDir {
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return errors.New("Target path \"" + targetDir + "\" already exists but not a directory")
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}
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isEmpty, _ := helpers.IsEmpty(targetDir, fs)
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if !isEmpty && !force {
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return errors.New("Target path \"" + targetDir + "\" already exists and is not empty")
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}
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}
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jekyllConfig := loadJekyllConfig(jekyllRoot)
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// Crude test to make sure at least one of _drafts/ and _posts/ exists
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// and is not empty.
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hasPostsOrDrafts := false
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postsDir := filepath.Join(jekyllRoot, "_posts")
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draftsDir := filepath.Join(jekyllRoot, "_drafts")
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for _, d := range []string{postsDir, draftsDir} {
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if exists, _ := helpers.Exists(d, fs); exists {
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if isDir, _ := helpers.IsDir(d, fs); isDir {
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if isEmpty, _ := helpers.IsEmpty(d, fs); !isEmpty {
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hasPostsOrDrafts = true
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}
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}
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}
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}
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if !hasPostsOrDrafts {
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return errors.New("Your Jekyll root contains neither posts nor drafts, aborting.")
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}
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mkdir(targetDir, "layouts")
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mkdir(targetDir, "content")
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mkdir(targetDir, "archetypes")
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mkdir(targetDir, "static")
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mkdir(targetDir, "data")
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mkdir(targetDir, "themes")
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createConfigFromJekyll(targetDir, "yaml", jekyllConfig)
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copyJekyllFilesAndFolders(jekyllRoot, filepath.Join(targetDir, "static"))
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return nil
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}
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func loadJekyllConfig(jekyllRoot string) map[string]interface{} {
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fs := hugofs.Source()
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path := filepath.Join(jekyllRoot, "_config.yml")
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exists, err := helpers.Exists(path, fs)
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if err != nil || !exists {
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jww.WARN.Println("_config.yaml not found: Is the specified Jekyll root correct?")
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return nil
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}
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f, err := fs.Open(path)
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if err != nil {
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return nil
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}
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defer f.Close()
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b, err := ioutil.ReadAll(f)
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if err != nil {
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return nil
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}
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c, err := parser.HandleYAMLMetaData(b)
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if err != nil {
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return nil
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}
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return c.(map[string]interface{})
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}
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func createConfigFromJekyll(inpath string, kind string, jekyllConfig map[string]interface{}) (err error) {
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title := "My New Hugo Site"
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baseurl := "http://example.org/"
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for key, value := range jekyllConfig {
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lowerKey := strings.ToLower(key)
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switch lowerKey {
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case "title":
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if str, ok := value.(string); ok {
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title = str
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}
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case "url":
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if str, ok := value.(string); ok {
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baseurl = str
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}
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}
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}
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in := map[string]interface{}{
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"baseurl": baseurl,
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"title": title,
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"languageCode": "en-us",
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"disablePathToLower": true,
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}
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kind = parser.FormatSanitize(kind)
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by, err := parser.InterfaceToConfig(in, parser.FormatToLeadRune(kind))
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if err != nil {
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return err
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}
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err = helpers.WriteToDisk(filepath.Join(inpath, "config."+kind), bytes.NewReader(by), hugofs.Source())
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if err != nil {
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return
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}
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return nil
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}
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func copyFile(source string, dest string) error {
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sf, err := os.Open(source)
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if err != nil {
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return err
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}
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defer sf.Close()
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df, err := os.Create(dest)
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if err != nil {
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return err
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}
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defer df.Close()
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_, err = io.Copy(df, sf)
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if err == nil {
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si, err := os.Stat(source)
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if err != nil {
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err = os.Chmod(dest, si.Mode())
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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func copyDir(source string, dest string) error {
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fi, err := os.Stat(source)
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if err != nil {
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return err
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}
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if !fi.IsDir() {
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return errors.New(source + " is not a directory")
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}
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err = os.MkdirAll(dest, fi.Mode())
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if err != nil {
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return err
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}
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entries, err := ioutil.ReadDir(source)
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for _, entry := range entries {
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sfp := filepath.Join(source, entry.Name())
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dfp := filepath.Join(dest, entry.Name())
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if entry.IsDir() {
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err = copyDir(sfp, dfp)
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if err != nil {
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jww.ERROR.Println(err)
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}
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} else {
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err = copyFile(sfp, dfp)
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if err != nil {
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jww.ERROR.Println(err)
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}
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}
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}
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return nil
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}
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func copyJekyllFilesAndFolders(jekyllRoot string, dest string) error {
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fi, err := os.Stat(jekyllRoot)
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if err != nil {
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return err
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}
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if !fi.IsDir() {
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return errors.New(jekyllRoot + " is not a directory")
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}
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err = os.MkdirAll(dest, fi.Mode())
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if err != nil {
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return err
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}
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entries, err := ioutil.ReadDir(jekyllRoot)
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for _, entry := range entries {
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sfp := filepath.Join(jekyllRoot, entry.Name())
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dfp := filepath.Join(dest, entry.Name())
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if entry.IsDir() {
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if entry.Name()[0] != '_' && entry.Name()[0] != '.' {
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err = copyDir(sfp, dfp)
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if err != nil {
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jww.ERROR.Println(err)
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}
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}
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} else {
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lowerEntryName := strings.ToLower(entry.Name())
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exceptSuffix := []string{".md", ".markdown", ".html", ".htm",
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".xml", ".textile", "rakefile", "gemfile", ".lock"}
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isExcept := false
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for _, suffix := range exceptSuffix {
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if strings.HasSuffix(lowerEntryName, suffix) {
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isExcept = true
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break
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}
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}
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if !isExcept && entry.Name()[0] != '.' && entry.Name()[0] != '_' {
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err = copyFile(sfp, dfp)
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if err != nil {
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jww.ERROR.Println(err)
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}
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}
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}
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}
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return nil
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}
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func parseJekyllFilename(filename string) (time.Time, string, error) {
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re := regexp.MustCompile(`(\d+-\d+-\d+)-(.+)\..*`)
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r := re.FindAllStringSubmatch(filename, -1)
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if len(r) == 0 {
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return time.Now(), "", errors.New("filename not match")
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}
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postDate, err := time.Parse("2006-01-02", r[0][1])
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if err != nil {
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return time.Now(), "", err
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}
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postName := r[0][2]
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return postDate, postName, nil
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}
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func convertJekyllPost(path, relPath, targetDir string, draft bool) error {
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jww.TRACE.Println("Converting", path)
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filename := filepath.Base(path)
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postDate, postName, err := parseJekyllFilename(filename)
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if err != nil {
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jww.WARN.Printf("Failed to parse filename '%s': %s. Skipping.", filename, err)
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return nil
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}
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jww.TRACE.Println(filename, postDate, postName)
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targetFile := filepath.Join(targetDir, relPath)
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targetParentDir := filepath.Dir(targetFile)
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os.MkdirAll(targetParentDir, 0777)
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contentBytes, err := ioutil.ReadFile(path)
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if err != nil {
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jww.ERROR.Println("Read file error:", path)
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return err
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}
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psr, err := parser.ReadFrom(bytes.NewReader(contentBytes))
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if err != nil {
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jww.ERROR.Println("Parse file error:", path)
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return err
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}
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metadata, err := psr.Metadata()
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if err != nil {
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jww.ERROR.Println("Processing file error:", path)
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return err
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}
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newmetadata, err := convertJekyllMetaData(metadata, postName, postDate, draft)
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if err != nil {
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jww.ERROR.Println("Convert metadata error:", path)
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return err
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}
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jww.TRACE.Println(newmetadata)
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content := convertJekyllContent(newmetadata, string(psr.Content()))
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page, err := hugolib.NewPage(filename)
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if err != nil {
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jww.ERROR.Println("New page error", filename)
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return err
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}
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page.SetDir(targetParentDir)
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page.SetSourceContent([]byte(content))
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page.SetSourceMetaData(newmetadata, parser.FormatToLeadRune("yaml"))
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page.SaveSourceAs(targetFile)
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jww.TRACE.Println("Target file:", targetFile)
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return nil
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}
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func convertJekyllMetaData(m interface{}, postName string, postDate time.Time, draft bool) (interface{}, error) {
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url := postDate.Format("/2006/01/02/") + postName + "/"
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metadata, err := cast.ToStringMapE(m)
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if err != nil {
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return nil, err
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}
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if draft {
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metadata["draft"] = true
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}
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for key, value := range metadata {
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lowerKey := strings.ToLower(key)
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switch lowerKey {
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case "layout":
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delete(metadata, key)
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case "permalink":
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if str, ok := value.(string); ok {
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url = str
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}
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delete(metadata, key)
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case "category":
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if str, ok := value.(string); ok {
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metadata["categories"] = []string{str}
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}
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delete(metadata, key)
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case "excerpt_separator":
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if key != lowerKey {
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delete(metadata, key)
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metadata[lowerKey] = value
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}
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case "date":
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if str, ok := value.(string); ok {
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re := regexp.MustCompile(`(\d+):(\d+):(\d+)`)
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r := re.FindAllStringSubmatch(str, -1)
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if len(r) > 0 {
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hour, _ := strconv.Atoi(r[0][1])
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minute, _ := strconv.Atoi(r[0][2])
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second, _ := strconv.Atoi(r[0][3])
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postDate = time.Date(postDate.Year(), postDate.Month(), postDate.Day(), hour, minute, second, 0, time.UTC)
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}
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}
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delete(metadata, key)
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}
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}
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metadata["url"] = url
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metadata["date"] = postDate.Format(time.RFC3339)
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return metadata, nil
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}
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func convertJekyllContent(m interface{}, content string) string {
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metadata, _ := cast.ToStringMapE(m)
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lines := strings.Split(content, "\n")
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var resultLines []string
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for _, line := range lines {
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resultLines = append(resultLines, strings.Trim(line, "\r\n"))
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}
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content = strings.Join(resultLines, "\n")
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excerptSep := "<!--more-->"
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if value, ok := metadata["excerpt_separator"]; ok {
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if str, strOk := value.(string); strOk {
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content = strings.Replace(content, strings.TrimSpace(str), excerptSep, -1)
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}
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}
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replaceList := []struct {
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re *regexp.Regexp
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replace string
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}{
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{regexp.MustCompile("<!-- more -->"), "<!--more-->"},
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{regexp.MustCompile(`\{%\s*raw\s*%\}\s*(.*?)\s*\{%\s*endraw\s*%\}`), "$1"},
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{regexp.MustCompile(`{%\s*highlight\s*(.*?)\s*%}`), "{{< highlight $1 >}}"},
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{regexp.MustCompile(`{%\s*endhighlight\s*%}`), "{{< / highlight >}}"},
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}
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for _, replace := range replaceList {
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content = replace.re.ReplaceAllString(content, replace.replace)
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}
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return content
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}
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