Directory bookmarks in Bash

g.bash

# https://gist.github.com/pcdv
function g() {
  local HLP="Bookmark your favorite directories:
g         : list bookmarked dirs
g .       : add current dir to bookmarks
g -e      : edit bookmarks
g <num>   : jump to n-th dir
g <regex> : jump to 1st matching dir"
  local D=_; local CFG="$HOME/.cdirs"
  
  case $1 in
      "") [ -f "$CFG" ] && nl "$CFG" || echo "$HLP" ;;
       .) pwd >> "$CFG" ;;
      -e) ${EDITOR:-vi} "$CFG" ;;
      -*) echo "$HLP" ;;
  [1-9]*) D=$(sed -ne "${1}p" "$CFG") ;;
       *) D=$(grep "$1" "$CFG" | head -1) ;;
  esac
  
  if [ "$D" != _ ]; then 
    [ -d "$D" ] && cd "$D" || echo "Not found"
  fi
}

Compact version