<?xml version="1.0"?>

<!--
  =============================================================================
    Checkstyle plugin for Maven.
  =============================================================================
-->
<project
  xmlns:j="jelly:core"
  xmlns:ant="jelly:ant"
  xmlns:util="jelly:util"
  xmlns:doc="doc">

  <!--
     ========================================================================
       Default goal.
     ========================================================================
  -->
  <goal name="checkstyle" description="Perform checkstyle checks"
      prereqs="checkstyle:report"/>

  <!--
     ========================================================================
       Initializations.
     ========================================================================
  -->
  <goal name="checkstyle:init">

    <j:if test="${sourcesPresent == 'true'}">

      <!-- If an explicit config file is set then use that. If one isn't 
      	   then we will look for the maven.checkstyle.format property and
      	   load the predefined config set. -->
      <j:set var="checkstylePropertiesX" value="${maven.checkstyle.properties}X"/>
      <j:choose>
        <j:when test="${checkstylePropertiesX != 'X'}">
          <j:set 
            var="checkstyleProperties" 
            value="${maven.checkstyle.properties}"/>
        </j:when>
        <j:otherwise>
          <j:set 
            var="checkstyleProperties" 
            value="${plugin.resources}/${maven.checkstyle.format}_checks.xml"/>
        </j:otherwise>
      </j:choose>

      <ant:taskdef name="checkstyle"
        classname="com.puppycrawl.tools.checkstyle.CheckStyleTask">
        <ant:classpath>
          <ant:pathelement location="${plugin.getDependencyPath('checkstyle:checkstyle')}"/>
          <ant:pathelement location="${plugin.getDependencyPath('antlr:antlr')}"/>
          <ant:pathelement location="${plugin.getDependencyPath('regexp:regexp')}"/>
          <ant:pathelement location="${plugin.getDependencyPath('commons-beanutils:commons-beanutils')}"/>
          <ant:pathelement location="${plugin.getDependencyPath('commons-collections:commons-collections')}"/>
          <ant:pathelement location="${plugin.getDependencyPath('commons-logging:commons-logging')}"/>
          <ant:path refid="maven.dependency.classpath"/>
          <ant:pathelement path="${maven.build.dest}"/>
        </ant:classpath>
      </ant:taskdef>

    </j:if>

  </goal>

  <!--
     ========================================================================
       Check if license file is available, display warning if not and sets
       the Ant "checkstyleShouldRun" property if the license file is 
       available.
     ========================================================================
  -->
  <goal name="checkstyle:license"
    prereqs="checkstyle:init">

    <j:if test="${sourcesPresent == 'true'}">

      <util:file var="header" name="${maven.checkstyle.header.file}"/>
      
      <j:choose>
        <j:when test="${not(header.exists())}">
          <ant:echo>
            =================================================================
            =                             W A R N I N G                     =
            =================================================================
            =  Your project doesn't contain a header file specified as:     =
            =  ${header}
            =  Checkstyle needs it to check the existence of the License in =
            =  your source files. If it can't find this file, it throws an  =
            =  error.                                                       = 
            =  A temporary solution is to create an empty LICENSE.txt file. =
            =  Though, we recommend that you edit this License.             =
            =================================================================
          </ant:echo>
        </j:when>
        <j:otherwise>
          <ant:property name="checkstyleShouldRun" value="true"/>
        </j:otherwise>
      </j:choose>

    </j:if>

  </goal>

  <!--
     ========================================================================
       Generate a checkstyle report by running checkstyle on the project
       source code.
     ========================================================================
  -->
  <goal name="checkstyle:report"
    description="Perform checkstyle checks"
    prereqs="checkstyle:init,checkstyle:license">

    <j:if test="${checkstyleShouldRun}">

      <!-- Create the directory for the checkstyle cache in case it doesn't 
      	   exist already -->
      <ant:dirname property="maven.checkstyle.cache.dir" 
        file="${maven.checkstyle.cache.file}"/>
      <ant:mkdir dir="${maven.checkstyle.cache.dir}"/>

      <ant:echo>Using ${checkstyleProperties} for checkstyle ...</ant:echo>

      <ant:checkstyle
        config="${checkstyleProperties}"
        failOnViolation="${maven.checkstyle.fail.on.violation}">

        <property key="checkstyle.header.file" 
          file="${maven.checkstyle.header.file}"/>
        <property key="checkstyle.cache.file" 
          file="${maven.checkstyle.cache.file}"/>

        <ant:fileset dir="${pom.build.sourceDirectory}"
          includes="${maven.checkstyle.includes}"
          excludes="${maven.checkstyle.excludes}">
          <!-- FIXME: This is a bad cut and paste -->
          <!-- handle source modifications -->
          <j:forEach var="sm" items="${pom.build.sourceModifications}">
            <ant:available property="classPresent" classname="${sm.className}"/>
            <j:if test="${classPresent != 'true'}">
              <j:forEach var="exclude" items="${sm.excludes}">
                <ant:exclude name="${exclude}"/>
              </j:forEach>
              <j:forEach var="include" items="${sm.includes}">
                <ant:include name="${include}"/>
              </j:forEach>
            </j:if>
          </j:forEach>

        </ant:fileset>

        <ant:formatter type="xml" 
          toFile="${maven.build.dir}/checkstyle-raw-report.xml"/>

        <j:choose>
          <j:when test="${maven.checkstyle.usefile}">
            <ant:formatter type="plain" 
              toFile="${maven.build.dir}/checkstyle-raw-report.txt"/>
          </j:when>
          <j:otherwise>
            <ant:formatter type="plain"/>
          </j:otherwise>
        </j:choose>

      </ant:checkstyle>
      
      <j:set var="maven.docs.outputencoding" value="${pom.getPluginContext('maven-xdoc-plugin').getVariable('maven.docs.outputencoding')}"/>
      
      <doc:jsl
        input="${maven.build.dir}/checkstyle-raw-report.xml"
        output="checkstyle-report.xml"
        stylesheet="${plugin.resources}/checkstyle.jsl"
        encoding="${maven.docs.outputencoding}"
        outputMode="xml"
        prettyPrint="true"/>

    </j:if>

  </goal>

  <!--
     ========================================================================
       Register a Checkstyle report to the "site" plugin.
     ========================================================================
  -->
  <goal name="maven-checkstyle-plugin:register">
    <j:if test="${sourcesPresent == 'true'}">
      <doc:registerReport 
        name="Checkstyle" 
        pluginName="checkstyle"
        link="checkstyle-report"
        description="Report on coding style conventions."/>
    </j:if>
  </goal>
  
  <!--
     ========================================================================
       Deregister a Checkstyle report to the "site" plugin.
     ========================================================================
  -->
  <goal name="maven-checkstyle-plugin:deregister">
    <j:if test="${sourcesPresent == 'true'}">
      <doc:deregisterReport name="Checkstyle"/>
    </j:if>
  </goal>

</project>
