Release folder cleanup script for Capistrano-like folder structure

release-cleanup.sh

#!/bin/bash

KEPT_RELEASES=5
CWD=/Users/ain/temp

# Check for Bash config
# On FreeBSD/OS X GNU ls is required for -v option
if [ -f ~/.bashrc ]; then
  shopt -s expand_aliases
  source ~/.bashrc
fi
pwd $CWD
for release in `ls -vr releases/`; do
  path="releases/$release"
  if [ -d $path ]; then
    KEPT_RELEASES=$[$KEPT_RELEASES - 1]
    if [ `readlink current` == $path ]; then
      echo "[ok] skipping $path, current release"
    elif (( $KEPT_RELEASES < 0 )); then
      if [[ `rm -rf $path` -eq 0 ]]; then
        echo "[x] removed $path"
      else
        echo "[!] failed to remove $path!"
      fi
    else
      echo "[ok] kept $path"
    fi
  fi
done