wire-upgrade.sh

#!/bin/bash


#
# ProcessWire upgrade script
#
# Upgrades ProcessWire ./wire directory.
# Use either master of dev branch.
#
#
# Usage:
#
# chmod +x ./wire-upgrade.sh
# ./wire-upgrade.sh dev|master
#


#
# Variables
#
TIME=`date +%Y-%m-%d`	# date Y-m-d
WIRE_TMP="wire.tmp"
WIRE_CURRENT="wire"
WIRE_BACKUP="wire.backup.$TIME"
WIRE_NEW="wire.new"
PW_REPO_URL="git://github.com/ryancramerdesign/ProcessWire.git"


#
# Functions
#


#
# Visual output
#
out ()
{
	echo "["`date +"%Y-%m-%d %T"`"] $1"
}


#
# Git checkout
#
checkout ()
{
	echo ""
	out "Retrieving repository..."
	git clone -b $1 $2 $3
	out "Done!"
	echo ""
}


#
# Cleanup
#
cleanup ()
{
	echo ""
	out "Cleaning up temporary directory..."
	rm -rf $WIRE_TMP
	out "Done!"
	echo ""
}


args=("$@")
BRANCH=${args[0]}


echo ""
out "ProcessWire upgrade script."
echo ""


if [ ! -d $WIRE_CURRENT ]; then
	out "ProcessWire '$WIRE_CURRENT' directory not found. Cannot continue."
	exit 0
fi


if [ -d $WIRE_TMP ]; then
	out "Temporary directory '$WIRE_TMP' already exists."
	out "Please delete before continuing."
	exit 0
fi


if [ -d "$WIRE_BACKUP" ]; then
	out "Backup directory '$WIRE_BACKUP' already exists."
	out "Please delete before continuing."
	exit 0
fi


if [ -z $BRANCH ]; then
	out "No branch specified. Please run with either 'master' or 'dev' parameter."
	out "E.g. './wire-upgrade.sh master'"
	exit 0
fi


echo ""
out "Upgrading ProcessWire in '$WIRE_CURRENT' to the current '$BRANCH' branch..."
echo ""


# Checkout from Git repo

checkout $BRANCH $PW_REPO_URL $WIRE_TMP


# Move the wire dir out of the downloaded repository

if [ ! -d "$WIRE_TMP/wire" ]; then
	out "New 'wire' directory '$WIRE_TMP/wire' does not exist. Cannot continue."
	exit 0
fi

mv -v $WIRE_TMP/wire "./$WIRE_NEW"

echo ""
out "Backing up current ProcessWire '$WIRE_CURRENT' to '$WIRE_BACKUP' ..."
echo ""

# Rename current wire to a .backup; and then move new version to 'wire' (making it the new version)

mv -v $WIRE_CURRENT $WIRE_BACKUP && mv -v $WIRE_NEW $WIRE_CURRENT

cleanup