permalink: :year/:month/:day/:title/
permalink_defaults:

/source/_posts/hello-world.md

/path/to/public/2021/03/10/hello-world/index.html

title: Hello World
date: 2013-07-14 17:01:34
categories:
    - foo
    - bar

:year/:month/:day/:title/ 
:year-:month-:day-:title.html
:category/:title

2013/07/14/hello-world/index.html
2013-07-14-hello-world.html
foo/bar/hello-world

permalink_defaults:
  lang: en

npm install hexo-abbrlink --save

permalink: posts/:abbrlink.html

算法：crc16(默认)或crc32
表示：dec(默认，十进制)或hex(十六进制)

# abbrlink config
abbrlink:
  alg: crc32  #support crc16(default) and crc32
  rep: hex    #support dec(default) and hex

abbrlink: xxxxx