<!-- This script defines a couple of handy macros for checking dependencies of 
.swf files built by the mxmlc compiler -->
<!-- by Ian Thomas at Awen, 2008 -->
<!-- NOTE: This script assumes you have the AntContrib tasks defined and ready 
to go in your ant file. See the AntContrib documentation for details -->
 
<!-- Load environment variables into Ant, so we can get at the temp path. Feel free to set
the cache path to whatever is appropriate instead... -->
<property environment="env"/>
<property name="cacheFolder" value="${env.TEMP}/flexcache"/><!-- alter this if required -->
 
<!-- This property is the root of all your source files for all of your code which
might be used by this script. This root should not include the path to Flex, as
we don't want to check dependencies on Flex code, only on code in your project
and your shared code libraries. -->
<property name="sourceRoot" location="C:\projects"/>
 
<!-- 
Should be run after any flex compile. Make sure you add the option:
  -link-report=someLinkReportFileName.xml
to your mxmlc call.
-->
<macrodef name="flex-generate-dependencies">
  <attribute name="target"/><!-- Compilation target e.g. e:\myfiles\myswf.swf -->
  <attribute name="link-report"/><!-- Path to link report e.g. e:\myfiles\link-report.xml -->
  <sequential>
    <!-- convert the target name into a unique cache filename -->
    <urlencode property=".tmp" override="true" location="@{target}"/>
    <var name=".out" value="${cacheFolder}/${.tmp}.txt"/>
 
    <!-- load the link report -->
    <if>
      <not><available file="@{link-report}"/></not>
      <then><fail>Can't read link report file:@{link-report}</fail></then>
    </if>
    <var name=".rawText" unset="true"/>
    <loadfile property=".rawText" srcFile="@{link-report}"/>
 
    <!-- convert the source root into a form suitable for putting into a regular expression -->
    <propertyregex property=".rootRegEx" override="true" input="${sourceRoot}"
        regexp="\\" replace="\\\\\\\\" global="true" defaultValue="${sourceRoot}"/>
 
    <!-- an empty var for us to append to -->
    <var name=".dependsFiles" value=""/>
 
    <!-- Use propertyregex to parse the XML -->
    <for list="${.rawText}" delimiter="&lt;" param=".scriptLine" trim="true">
      <sequential> 
        <var name=".scriptName" unset="true"/>
        <propertyregex property=".scriptName"
            input="@{.scriptLine}"
            regexp="script name=&quot;${.rootRegEx}\\([^\&quot;]*)&quot;"
            select="\1"/>
        <if>
          <isset property=".scriptName"/>
          <then>
            <!-- Found a relevant file - add it to the list of files -->
            <var name=".dependsFiles" value="${.dependsFiles}&amp;#x0D;${.scriptName}"/>
          </then>
        </if>
      </sequential>
    </for>
    <!-- Write all the files out to our cache file -->
    <concat destfile="${.out}">${.dependsFiles}</concat>
  </sequential>
</macrodef>
 
<!-- Sets a property if the target file is up to date -->
<macrodef name="flex-uptodate">
  <attribute name="target"/><!-- Compilation target e.g. e:\myfiles\myswf.swf -->
  <attribute name="property"/><!-- Property to set e.g. appUpToDate -->
  <sequential>
    <!-- convert the target name into a unique cache filename -->
    <urlencode property=".tmp" location="@{target}" override="true"/>
    <var name=".in" value="${cacheFolder}/${.tmp}.txt"/>
 
    <var name="@{property}" unset="true"/>
 
    <if>
        <available file="${.in}"/>
        <then>
          <!-- Use the Ant built-in uptodate task, passing it 
                 the list of files generated in the previous step -->
          <uptodate property="@{property}" targetfile="@{target}">
            <srcfiles dir="${sourceRoot}" includesfile="${.in}"/>
          </uptodate>
        </then>
    </if>
  </sequential>
</macrodef>

<target name="compile">
  <var name="swf" value="c:\myprojects\project\bin\mySwf.swf"/>
  <flex-uptodate target="${swf}" property="isUpToDate"/>
  <if>
    <not><isset property="isUpToDate"/></not>
    <then>
      <exec executable="mxmlc.exe" dir="c:\myprojects\project\src" failonerror="true">
        <arg value="MySwf.mxml"/>
        <arg line="-output ${swf}"/>
        <arg line="-sp ."/>
        <arg line="-link-report=${env.TEMP}/link-report.xml"/>
      </exec>
      <flex-generatedependencies target="${swf}" link-report="${env.TEMP}/link-report.xml"/>
    </then>
  </if>
</target>