#!/bin/bash

# Makes a backup of a DreamHost user's account
#
# Step 1: creates backups into the directory '~/{USER}.backups'
# Step 2: calls the '~/bin/makeLocalBackups.sh' script, if it exists
# Step 3: rsyncs the contents of the '~/{USER}.backups' directory to the
# DreamHost provided backup space (an ssh key is installed there.)
# symlinks are followed in this backup, so dirs to-be-backed-up can be symlinked there
#
# Requires the template file to be completed to supply constants.
# Also requires an passphrase-less ssh key be supplied to enable ssh backups to the backup user.
# See README file.
#

# # Call the template file if available
templateFile="`dirname ${0}`/dhsetup.sh"
if [ -x "${templateFile}" ]; then
	. "${templateFile}"
fi

# # Constants.

# These are based on the DreamHost setup.
# If USER is not defined, try 'LOGNAME' which is defined by cron
if [ -z "${USER}" ]; then
	USER="${LOGNAME}"
fi
export HOME="/home/${USER}"
export BIN="${HOME}/bin"
export BACKUP_DIR="${HOME}/${USER}.backups"

# Dreamhost backup user information
# The backup username, DH_BACKUP_USER, is defined in the template file
DH_BACKUP_HOST="backup.dreamhost.com"
if [ -n "${DH_BACKUP_PREFIX}" ]; then
	DH_BACKUP_DIR="/home/${DH_BACKUP_USER}/${DH_BACKUP_PREFIX}"
else
	DH_BACKUP_DIR="/home/${DH_BACKUP_USER}"
fi

# The backup script name
LOCAL_BACKUP_SCRIPT="makeLocalBackups.sh"


# # Begin backup
echo -e "\n*** *** Performing backup for user '${USER}'"

# Backup the bin directory.  Does not follow links.
echo -e "*** Backing up bin directory"
rsync -rptgov ${BIN} ${BACKUP_DIR}

# Call local backup script to create backup stuff
# Find locally first, then within links
localScript="`find "${BIN}" -name "${LOCAL_BACKUP_SCRIPT}" -perm /u+x | head -1`"
if [ ! -x "${localScript}" ]; then
	localScript="`find -L "${BIN}" -name "${LOCAL_BACKUP_SCRIPT}" -perm /u+x | head -1`"
fi
if [ -x "${localScript}" ]; then
        echo "*** Calling '${localScript}'"
        ${localScript}
        echo "*** Call to '${localScript}' complete."
fi

# # Begin rsync to backup account
if [ -n "${DH_BACKUP_USER}" ]; then
	echo "*** Performing rsync to backup account."
	rsync -rLptgov --delete -e ssh ${BACKUP_DIR} ${DH_BACKUP_USER}@${DH_BACKUP_HOST}:${DH_BACKUP_DIR}
fi

echo -e "\n*** *** Backup complete for user '${USER}'"