Faster php lint target for jenkins php

build.xml

<!-- 
  
    More faster : lint only modified files 
    --------------------------------------

    We create a new target to retrieve a list of modified files
    If there is modified files, execute the lint target, else skip
    with the `if="modifiedFiles"` option.

    The list of modified files is stored in ${files.modified}, one file per line.

    Feel free to reuse the checkModified target to execute other tasks only on 
    newly modified .php files
  
-->

<!-- A new target to search for modified files -->
<target name="checkModified" description="Check for modified php files">

    <echo message="Searching for newly modified files" />

    <path id="editedfiles">
        <fileset dir="${basedir}/src/">
            <modified />  <!-- Search only for modified files -->
            <include name="**/*.php" /> <!-- Search only for files with .php extension -->
            <exclude name="**/vendor/**" /> <!-- Exclude vendor directory -->
        </fileset>
    </path>

    <pathconvert pathsep="${line.separator}" property="files.modified" refid="editedfiles" />

    <condition property="modifiedFiles">
        <not>
            <equals arg1="${files.modified}" arg2="" />
        </not>
    </condition>

</target>


<!-- The Php Lint target -->
<!-- Will only execute if and only if there is some modified files -->
<target name="lint" depends="checkModified" description="Perform syntax check of sourcecode files" if="modifiedFiles">
    <echo message="Linting php files" />
    <exec executable="bash" failonerror="true">
        <arg value="-c" />
        <arg value="echo '${files.modified}' | xargs -n 1 -P 4 php -l" />
    </exec>
</target>


<!-- 

  Just lint all files in parallel
  ------------------------------
  If you want to lint all files, not only on modified one 
  
-->
<target name="lint" description="Perform syntax check of sourcecode files">
    <exec executable="bash" failonerror="true">
        <arg value="-c" />
        <arg value="find -L ${basedir}/src -name '*.php' -print0 | xargs -0 -n 1 -P 4 php -l" />
    </exec>
</target>

< modified / > do all work