Shell Bookmarks

.shell_bookmarks

#!/bin/bash
# SHELL BOOKMARKS with Completion
# ----------------------------------------------------------------------------
# Usage: Source this file in your ~/.bashrc - Use `cdb` command
# Help:  cdb --help
#
# 2021-09-14 - Ken Bernier <kbernier@gmail.com>
#
# Script manages symlinks of directories to create bookmark function with
# name completion.  All bookmarks are symlinks stored in $DIRBOOKMARKS.
#
# Inspired by:
# https://stackoverflow.com/questions/7374534/directory-bookmarking-for-bash
# https://threkk.medium.com/how-to-use-bookmarks-in-bash-zsh-6b8074e40774
# https://twitter.com/mattn_jp/status/1434192554036137995?s=20
#
# ----------------------------------------------------------------------------
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
# ----------------------------------------------------------------------------

# Change this variable to your own bookmarks directory location
DIRBOOKMARKS="${HOME}/.bookmarks"

# Create bookmarks directory if not exist along with a couple of symlinks to prevent issues
if [[ ! -d "${DIRBOOKMARKS}" ]]; then
  mkdir "${DIRBOOKMARKS}"
  ln -s "${DIRBOOKMARKS}" "${DIRBOOKMARKS}"/bookmarks
  ln -s "${HOME}" "${DIRBOOKMARKS}"/home
fi

# completion function
_cdb() {
  local _script_commands cur
  _script_commands=$(ls -1 "${DIRBOOKMARKS}"/)
  cur=${COMP_WORDS[COMP_CWORD]}
  COMPREPLY=( $(compgen -W "$(/bin/ls -A "${DIRBOOKMARKS}")" -- "$cur") )
}

# Initialize completion
complete -F _cdb cdb

# Main function
cdb() {
  local USAGE
  USAGE="%sShell Bookmarks with Name Completion
  \nUsage: cdb [-c|-d|-r|-s|-l|-f|--help] [bookmark]
  \nPress TAB for bookmark name completion.\n
  bookmark\t\t- change directory to bookmark
  -c new_name\t\t- create bookmark from current directory
  -d bookmark\t\t- delete bookmark
  -r bookmark new_name\t- rename bookmark
  -s bookmark\t\t- show bookmark symlink location
  -l\t\t\t- list bookmarks
  -f\t\t\t- [fzf] change directory to bookmark
  --help\t\t- prints usage help\n"

  case $1 in
    # create bookmark
    -a|-c|--add|--create) shift
      if [[ -L "${DIRBOOKMARKS}"/"$1" ]]; then
        printf '%s\n' "Bookmark already exists: $1 >> $(readlink -f "${DIRBOOKMARKS}"/"$1")"
      elif [[ ! "$1" ]]; then
        printf '%s\n' "No bookmark name entered. - Usage: cdb -a <new_bookmark_name>"
      elif [[ ! -L "${DIRBOOKMARKS}"/"$1" ]]; then
        ln -s "${PWD}" "${DIRBOOKMARKS}"/"$1"
        complete -F _cdb cdb
      fi
    ;;
    # show bookmark
    -s|--show) shift
      if [[ -L "${DIRBOOKMARKS}"/$1 ]]; then
        readlink -f "${DIRBOOKMARKS}"/"$1"
      else
        printf '%s\n' "Bookmark not found!"
      fi
    ;;
    # delete bookmark
    -d|--delete) shift
      if [[ -L "${DIRBOOKMARKS}"/"$1" ]]; then
        if ! unlink "${DIRBOOKMARKS}"/"$1"; then printf '%s\n' "Issue when deleting bookmark!"; fi
      elif [[ ! -L "${DIRBOOKMARKS}"/"$1" ]]; then
        printf '%s\n' "Bookmark not found! - Usage: cdb -d <bookmark>"
      fi
    ;;
    # rename bookmark
    -r|--rename) shift
      if ! mv "${DIRBOOKMARKS}"/"$1" "${DIRBOOKMARKS}"/"$2"; then
        printf '%s\n' "Issue when renaming bookmark! - Usage: cdb -r <bookmark> <new_name>"; fi
    ;;
    # list bookmarks
    -l|--list) shift
      ls -1 "${DIRBOOKMARKS}"/
    ;;
    # fzf
    -f|--fzf)
      if [[ "$(command -v fzf)" ]]; then
        cd "${DIRBOOKMARKS}"/"$(/bin/ls -A "${DIRBOOKMARKS}" | fzf)" || return
      else
        printf '%s\n' "fzf not found!"
      fi
    ;;
    --help) printf "$USAGE"
    ;;
    # goto bookmark
    *) 
      if [[ ! "$1" ]]; then
        return 0
      elif [[ -L "${DIRBOOKMARKS}"/"$1" ]]; then
        cd -P "${DIRBOOKMARKS}"/"$1" &>/dev/null || return
      elif [[ ! -L "${DIRBOOKMARKS}"/"$1" ]]; then
        printf '%s\n' "Bookmark $1 does not exist."
      fi
    ;;
  esac
}