custom-build/MRPP_CustomBuild.xml

<?xml version="1.0" encoding="UTF-8"?>
<meta-runner name="Custom Build">
  <description>Triggers a build with custom parameters</description>
  <settings>
    <parameters>
      <param name="system.buildConf.id" value="" spec="text description='Identifier of a build configuration where to trigger a build' display='normal' label='Build configuration ID:' validationMode='not_empty'" />
      <param name="system.custom.params" value="" spec="text description='New-line delimited custom build parameters in the form: &lt;name&gt;=&lt;value&gt;' display='normal' label='Custom parameters:' regexp='(|[^=\s|]+=|[^=\s|]+\s*)*' validationMessage='Expected new-line delimited &lt;name&gt;=&lt;value&gt; pairs' validationMode='regex' allowEmpty='true'" />
      <param name="system.username" value="" spec="text description='Username of a user who triggers build' display='normal' label='Username:' validationMode='not_empty'" />
      <param name="system.password" value="" spec="password description='Password of a user who triggers build' display='normal' label='Password:'" />
    </parameters>
    <build-runners>
      <runner name="" type="Ant">
        <parameters>
          <param name="build-file"><![CDATA[<project name="Custom build">

<taskdef name="http" classname="org.missinglink.ant.task.http.HttpClientTask"/>

<property name="reqParams.file" location="${teamcity.build.tempDir}/rawParams.txt"/>

<target name="prepare-params">
<echo file="${reqParams.file}" message="${custom.params}"/>

<replaceregexp file="${reqParams.file}"
               match="([^=]+)=([^=]+)"
               replace="name=\1&amp;value=\2"
               byline="true"
/>
<replaceregexp file="${reqParams.file}"
               match="[\r\n]+"
               replace="&amp;"
               flags="gm"
/>
<echo file="${reqParams.file}" append="true">&amp;add2Queue=${buildConf.id}</echo>
</target>

<target name="add2Queue" depends="prepare-params">
<http url="%teamcity.serverUrl%/httpAuth/action.html" 
      method="POST" 
      expected="200"
      printrequest="true">
<credentials username="${username}" password="${password}"/>
<entity file="${reqParams.file}" binary="false"/>
</http>
</target>

</project>]]></param>
          <param name="build-file-path" value="build.xml" />
          <param name="target" value="add2Queue" />
          <param name="runnerArgs" value="-lib %teamcity.tool.ant-net-tasks%" />
          <param name="teamcity.coverage.emma.include.source" value="true" />
          <param name="teamcity.coverage.emma.instr.parameters" value="-ix -*Test*" />
          <param name="teamcity.coverage.idea.includePatterns" value="*" />
          <param name="teamcity.step.mode" value="default" />
          <param name="use-custom-build-file" value="true" />
        </parameters>
      </runner>
    </build-runners>
    <requirements />
  </settings>
</meta-runner>