SOLR-3733: Add a link from Solr back to Lucene docs

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr3733@1388253 13f79535-47bb-0310-9956-ffa450edef68

solr/build.xml

@@ -143,7 +143,7 @@
     depends="javadocs,changes-to-html,process-webpages"/>
   <target name="compile-core" depends="compile-solr-core" unless="solr.core.compiled"/>
   
-  <target name="process-webpages" depends="resolve-pegdown">
+  <target name="process-webpages" depends="define-lucene-javadoc-url"> <!--depends="resolve-pegdown">-->
     <makeurl property="process-webpages.buildfiles" separator="|">
       <fileset dir="." includes="core/build.xml,test-framework/build.xml,solrj/build.xml,contrib/**/build.xml"/>
     </makeurl>
@@ -159,12 +159,15 @@
       <outputproperty name="indent" value="yes"/>
       <param name="buildfiles" expression="${process-webpages.buildfiles}"/>
       <param name="version" expression="${version}"/>
+      <param name="luceneJavadocUrl" expression="${lucene.javadoc.url}"/>
     </xslt>
     
+    <!--nothing at the moment:
     <pegdown todir="${javadoc.dir}">
       <fileset dir="." includes="MIGRATE.txt,JRE_VERSION_MIGRATION.txt"/>
       <globmapper from="*.txt" to="*.html"/>
     </pegdown>
+    -->
 
     <copy todir="${javadoc.dir}">
       <fileset dir="site/html" includes="**/*"/>

solr/site/xsl/index.xsl

@@ -22,6 +22,7 @@
 >
   <xsl:param name="buildfiles"/>
   <xsl:param name="version"/>
+  <xsl:param name="luceneJavadocUrl"/>
   
   <!--
     NOTE: This template matches the root element of any given input XML document!
@@ -56,6 +57,7 @@
           <ul>
             <li><a href="changes/Changes.html">Changes</a>: List of changes in this release.</li>
             <li><a href="tutorial.html">Solr Tutorial</a>: This document covers the basics of running Solr using an example schema, and some sample data.</li>
+            <li><a href="{$luceneJavadocUrl}index.html">Lucene Documentation</a></li>
           </ul>
         <h2>API Javadocs</h2>
         <xsl:call-template name="modules"/>