gistfile1.xml

    <unit id='toolingorg.eclipse.e4.fix.jvmArg' version='4.2.0.I20120131-2200' singleton='false'>
      <provides size='2'>
        <provided namespace='org.eclipse.equinox.p2.iu' name='toolingorg.eclipse.e4.fix.jvmArg' version='4.2.0.I20120131-2200'/>
        <provided namespace='toolingorg.eclipse.sdk.ide' name='org.eclipse.e4.fix.jvmArg' version='4.2.0.I20120131-2200'/>
      </provides>
      <requires>
        <required namespace='org.eclipse.equinox.p2.iu' name='org.eclipse.sdk.ide' range='[0.0.0,5.0.0)'/>
      </requires>
      <touchpoint id='org.eclipse.equinox.p2.osgi' version='1.0.0'/>
      <touchpointData size='1'>
        <instructions size='2'>
          <instruction key='unconfigure'>
            addJvmArg(jvmArg:-Xms40m);addJvmArg(jvmArg:-Xmx384m);removeJvmArg(jvmArg:-Xms64m);removeJvmArg(jvmArg:-Xmx1024m);
          </instruction>
          <instruction key='configure'>
            removeJvmArg(jvmArg:-Xms40m);removeJvmArg(jvmArg:-Xmx384m);addJvmArg(jvmArg:-Xms64m);addJvmArg(jvmArg:-Xmx1024m);
          </instruction>
        </instructions>
      </touchpointData>
    </unit>

gistfile2.xml

<!-- example instruction that adds repositories -->
      <touchpointData size='1'>
        <instructions size='1'>
          <instruction key='configure'>
            addRepository(type:0,location:http${#58}//download.eclipse.org/eclipse/updates/4.4,name:The Eclipse Project Updates);addRepository(type:1,location:http${#58}//download.eclipse.org/eclipse/updates/4.4,name:The Eclipse Project Updates);addRepository(type:0,location:http${#58}//download.eclipse.org/releases/luna,name:Luna);addRepository(type:1,location:http${#58}//download.eclipse.org/releases/luna,name:Luna);mkdir(path:${installFolder}/dropins);
          </instruction>
        </instructions>
      </touchpointData>