How To Generate package.xml Through Force.com Migration Tool and Change Sets

Prerequisites: Force.com Migration Tool [ANT]. This is one of the popular deployment tools used for migrating Salesforce metadata from one org/sandbox to another. Check this link for Installation details if you don’t already have Force.com Migration Tool. https://developer.salesforce.com/docs/atlas.en-us.daas.meta/daas/forcemigrationtool_install.htm

Follow below steps to generate package.xml

• Go to Setup and create a Change Set in your sandbox. You cannot test this feature with Developer edition since Developer edition doesn’t come with any sandboxes

• Copy below script and paste it into build.xml file

<project name="Salesforce Retrieval Package" default="" basedir="." xmlns:sf="antlib:com.salesforce"
		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="antlib:com.salesforce">
    <taskdef resource="net/sf/antcontrib/antlib.xml"/>

	<property file="build.properties" />
	<property file="secret.properties" />
	<property environment="env" />

    <property name="maxPoll" value="1000" />
    <property name="defaultPackageFolder" value="package" />
    <property name="devPackageFolder" value="package-dev" />
	<property name="salesforceUrl" value="https://test.salesforce.com" />

	<target name="-prompt" unless="hidePrompt">
		<input message="${promptMessage}"
			   validargs="y,n"
			   addproperty="do.delete"
		/>
		<condition property="do.abort">
			<equals arg1="n" arg2="${do.delete}" />
		</condition>
		<fail if="do.abort">Build aborted by user.</fail>
	</target>

	<macrodef name="retrieve-cs">
		<attribute name="folder" />
		<attribute name="prompt" default="true" />
		<sequential>
			<condition property="hidePrompt">
                <or>
                    <isset property="jenkins"/>
                    <equals arg1="@{prompt}" arg2="false" />
                </or>
            </condition>

			<input message="Please enter the name of the change set:"
				   addproperty="source.changeSetName"
			/>
			<property name="promptMessage" value="Are you sure you want to retrieve a change set from the following org?${line.separator}
			salesforceUrl: ${salesforceUrl}${line.separator}
			username:      ${username}${line.separator}
			changeSet:     ${source.changeSetName}${line.separator}
			folder:        @{folder}${line.separator}" />
			<antcall target="-prompt" />

			<mkdir dir="@{folder}" />
			<sf:retrieve username="${username}"
						 password="${password}"
						 serverurl="${salesforceUrl}"
						 maxPoll="${maxPoll}"
						 retrieveTarget="@{folder}"
						 packageNames="${source.changeSetName}" />
		</sequential>
	</macrodef>

	<target name="retrieve-cs" description="Retrieves package metadata components from a specified change set in the source org.">
        <!--<retrieve-cs folder="${defaultPackageFolder}" />-->
		<retrieve-cs folder="changeSet" />
    </target>

</project>

• Above code has operation called ‘retrieve-cs’, that retrieves Change Set components from your Sandbox. Make sure username and password variables in build.properties are same as in build.xml
• Run ‘ant retrieve-cs’ command in command prompt/terminal. Enter the change set name when prompted and confirm the operation. Script should create a new folder called changeSet and stashes the components from Change Set in to the same. If everything is okay, you should see that build is successful like below

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Happy Coding!

About The contributor: 

• Suneel Pelluru

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