Change permalink for English posts

[mincong-h]

Overview

Change permalink for English posts so that English posts and Chinese posts are aligned.

- permalink   : /:year/:month/:day/:title/
+ permalink   : /en/:title/

New URL pattern for English posts (collection posts) and Chinese posts (collection cn):

en: /en/:title/
cn: /cn/:title/

Existing posts are kept for backward compatibility. It only applies to new posts that will be created after this PR. Why? Mainly because I don't want to break the comment system (Disqus) and Google Analytics. And I don't want to spend too much time on the migration since it's not the top priority.

Migration

Script used for hard-coding the URL for existing posts:

#!/bin/bash
paths=($(find "${HOME}/github/mincong-h.github.io/_posts" -type f -name "*.md" | tr '\n' ' '))
i=0
for path in "${paths[@]}"
do
    filename="${path##*/}"
    year=$(echo $filename  | sed -E 's/^([[:digit:]]+)-([[:digit:]]+)-([[:digit:]]+)-(.*)\.md/\1/')
    month=$(echo $filename | sed -E 's/^([[:digit:]]+)-([[:digit:]]+)-([[:digit:]]+)-(.*)\.md/\2/')
    day=$(echo $filename   | sed -E 's/^([[:digit:]]+)-([[:digit:]]+)-([[:digit:]]+)-(.*)\.md/\3/')
    name=$(echo $filename  | sed -E 's/^([[:digit:]]+)-([[:digit:]]+)-([[:digit:]]+)-(.*)\.md/\4/')
    permalink="/${year}/${month}/${day}/${name}/"
    echo "${i}: year=${year}, month=${month}, day=${day}, name=${name}, permalink=${permalink}"
    sed -i '' -E '/comments:/i\
permalink:         PERMALINK
' "$path"
    sed -i '' "s|PERMALINK|${permalink}|" "$path"
    i=$((i + 1))
done

Testing

New post uses new permalink:

➜  mincong-h.github.io git:(permalink u=) ./newpost.sh Test Me
Blog created: /Users/minconghuang/github/mincong-h.github.io/_posts/2021-07-11-test-me.md

➜  mincong-h.github.io git:(permalink % u=) ✗ curl -I localhost:4000/en/test-me/
HTTP/1.1 200 OK
Etag: 300810333-a3b7-60eb1d83
Content-Type: text/html; charset=utf-8
Content-Length: 41911
Last-Modified: Sun, 11 Jul 2021 16:34:11 GMT
Cache-Control: private, max-age=0, proxy-revalidate, no-store, no-cache, must-revalidate
Server: WEBrick/1.4.2 (Ruby/2.6.3/2019-04-16)
Date: Sun, 11 Jul 2021 16:35:02 GMT
Connection: Keep-Alive

Existing posts remain unchanged:

➜  mincong-h.github.io git:(permalink % u=) ✗ curl -I localhost:4000/2021/04/20/an-important-change/
HTTP/1.1 200 OK
Etag: 3007ec374-a679-60eb1d83
Content-Type: text/html; charset=utf-8
Content-Length: 42617
Last-Modified: Sun, 11 Jul 2021 16:34:11 GMT
Cache-Control: private, max-age=0, proxy-revalidate, no-store, no-cache, must-revalidate
Server: WEBrick/1.4.2 (Ruby/2.6.3/2019-04-16)
Date: Sun, 11 Jul 2021 16:35:59 GMT
Connection: Keep-Alive