#!/usr/bin/ruby

# Dumps the Subversion repositories of applications on Rails Machine.
# This script is intended to be called by cron on your Rails Machine.
#
# Andrew Stewart, AirBlade Software Ltd (boss at airbladesoftware dot com)
# Feedback gratefully received.
#
# Version 0.1

require 'rubygems'
require 'logger'
require 'yaml'

# Configure the script here.  You won't need to change anything
# unless you have modified your Rails Machine setup.
APPS_PATH   = '/var/www/apps'             # Path to all your apps
EXCLUSIONS  = %w( rails mephisto )        # Any directories or apps to exclude
BACKUP_PATH = '/backup/storage'           # Where to store the backups
TIMESTAMP   = '%Y%m%d%H%M%S'              # Timestamp for databases' backup files
LOG_FILE    = '/home/deploy/svn_dump.log' # Where to log activity

# The body of the script follows.

log = Logger.new(LOG_FILE, 5, 10*1024)
log.level = Logger::DEBUG

log.info 'Starting subversion dumps'
Dir["#{APPS_PATH}/*"].each do |entry|
  app = File.basename entry
  app_backup_path = "#{BACKUP_PATH}/#{app}"
  next if File.file?(entry) || EXCLUSIONS.include?(app)

  Dir.mkdir app_backup_path unless File.exist? app_backup_path
  repos = "#{entry}/repos"
  dump = "#{app_backup_path}/svn-repos-#{Time.now.strftime(TIMESTAMP)}.gz"
  dump_cmd = "svnadmin dump #{repos} | gzip - > #{dump}"
  log.debug "Executing: #{dump_cmd}"
  `#{dump_cmd}`
  log.info "Dumped #{repos} to #{dump}"
end
log.info 'Finished subversion dumps'