bash - 使用纯 bash 创建 URL 友好的 slug？

Question

我正在寻找一个纯 bash 解决方案来“slugify”一个变量，而且它不像我的那样难看。

slugify: lowercased, shortened to 63 bytes, and with everything except 0-9 and a-z replaced with -. No leading / trailing -. A string suitable to use in URL hostnames and domain names is the result. An input is most likely a series of words with undesired characters in throughout such as:

'Effrafax_mUKwT'uP7(Garkbit<\1}@NJ"RJ"Hactar*S;-H%x.?oLazlarl(=Zss@c9?qick.:?BZarquonelW{x>g@'k'

Of which a slug would look like: 'effrafax-mukwt-up7-garkbit-1-njrjhactar-s-h-x-olazlarl-zss-c9-q'

slugify () {
  next=${1//+([^A-Za-z0-9])/-}
  next=${next:0:63}
  next=${next,,}
  next=${next#-}
  next=${next%-}
  echo $next
}

另外，为什么 ${next//^-|-$} 不去掉前缀和后缀 '-'？其他建议？

Answer 1

我在我的 bash 配置文件中使用这个函数:

slugify () {
    echo "$1" | iconv -t ascii//TRANSLIT | sed -r s/[~\^]+//g | sed -r s/[^a-zA-Z0-9]+/-/g | sed -r s/^-+\|-+$//g | tr A-Z a-z
}

基于:https://gist.github.com/oneohthree/f528c7ae1e701ad990e6