長いパスのショートカットを作る

cd-longlonglong.sh

#!/bin/bash

# https://stackoverflow.com/questions/2683279/how-to-detect-if-a-script-is-being-sourced
is_sourced() {
  if [ -n "$ZSH_VERSION" ]; then
      case $ZSH_EVAL_CONTEXT in *:file:*) return 0;; esac
  else  # Add additional POSIX-compatible shell names here, if needed.
      case ${0##*/} in dash|-dash|bash|-bash|ksh|-ksh|sh|-sh) return 0;; esac
  fi
  return 1  # NOT sourced.
}

if is_sourced; then
        cd /path/to/super/long/long/long/long
else
        echo "以下のように実行して下さい"
        echo " . ./cd-longlonglong.sh"
        exit 1
fi