Basic CodeIgniter deployment using Mercurial via SSH.

build.xml

<project name="deploy" default="help" basedir=".">

	<!-- 
		Required properties:

		Repo to pull from
		- repo

		Location to deploy too
		- deploy.location

		Host to deploy to
		- host

		Username of ssh
		- username-

		SSH key file
		- keyfile=

		Key file passphase 
		- passphase
	-->
	<loadproperties srcFile="local.properties"/>

	<tstamp>
	     <format property="timestamp" pattern="yyyy-MM-dd_HHmmss"/>
	</tstamp>

	<!-- New public_html directory -->
	<property name="public_html.dir" value="public_html_${timestamp}" />

	<!-- Update website -->
	<target name="update">
		<ssh command="cd ${deploy.location}; hg clone ${repo} ${public_html.dir}; cd ${public_html.dir}; rm -rf .hg .hgignore; sed -i &quot;s/'development');/'production');/&quot; index.php" />
		<ssh command="cd ${deploy.location}; old_path=0; if test -d public_html; then old_path=$(readlink -f public_html); fi; ln -s ${public_html.dir} public_html_tmp &amp;&amp; mv -Tf public_html_tmp public_html; rm -rf $$old_path" />
	</target>

	<!-- Macro for running ssh commands easier -->
	<macrodef name="ssh">
		<attribute name="command"/>
		<sequential>
			<sshexec host="${host}" username="${username}" keyfile="${keyfile}" passphrase="${passphase}" trust="true" command="@{command}"/>
		</sequential>
	</macrodef>

	<!-- Display help -->
	<target name="help">
		<echo message="Use this script to deploy CodeIgniter website to production" />
		<echo message="  update - deploy the website to live" />
	</target>
</project>