If you've used 'ant -Dj2ee.sdk.home="C:\j2sdkee1.3.1\lib"', then the dist

and compile targets will build the servlet form of the translation tool.  If you
haven't, they won't build it.

Added comments.

Made it easier to change the build classpath inside a target while retaining
reusability.

Fixed typo: ttbin should've been ttservletbin.

build.xml

@@ -1,4 +1,4 @@
-<!-- @author David Chandler
+<!-- @author David Chandler, dchandler@users.sourceforge.net
 
      We have a document,
      http://thdltools.sourceforge.net/BuildSystems.html, that
@@ -61,6 +61,10 @@
   <property name="ext"  location="extensions"/>
   <property name="publicjavadocs"  location="${docs}/public-javadocs"/>
   <property name="privatejavadocs"  location="${docs}/private-javadocs"/>
+
+  <!-- If you have installed the J2EE SDK, then you can compile servlets.
+       Set this property to the directory containing j2ee.jar: 
+    -->
   <property name="j2ee.sdk.home" location="F:\Program Files\j2sdkee1.3.1\lib"/>
 
   <!-- Set to true for more output when running the tools and if you
@@ -77,6 +81,9 @@
        or something.  -->
   <property name="target.jvm" value="1.1"/>
 
+  <!-- Only the tt-servlet-compile target changes this.  Humans
+       shouldn't mess with this. -->
+  <property name="our.javac.classpathref" value="entire.class.path"/>
 
 
   <!-- To easily add a jar to the CLASSPATH, just drop it into
@@ -93,10 +100,6 @@
     <pathelement location="${ext}/xml-apis.jar"/>
     <pathelement location="${ext}/jmf.jar"/>
 
-    <fileset dir="${j2ee.sdk.home}">
-      <include name="j2ee.jar"/>
-    </fileset>
-
     <!-- this gets Ant's jars, so leave it out:
         <pathelement path="${java.class.path}/"/> -->
 
@@ -147,14 +150,12 @@
           description="JARs up everything into self-contained JARs for double-click, classpath-worry-free joy" />
 
   <target name="dist"
-          depends="jskad-dist,savant-dist,qd-dist,tt-handheld-dist,tt-standalone-dist,tt-applet-plus-jws-dist"
+          depends="jskad-dist,savant-dist,qd-dist,tt-handheld-dist,tt-standalone-dist,tt-applet-plus-jws-dist,tt-servlet-dist"
           description="JARs up everything" />
 
-  <!-- Don't compile tt-servlet by default, since not everyone has the
-       J2EE SDK installed: -->
   <target name="compile"
-          depends="jskad-compile,savant-compile,qd-compile,tt-standalone-compile,tt-handheld-compile,tt-applet-plus-jws-compile"
-          description="compiles all programs except for those that are for J2EE (rather than J2SE)" />
+          depends="jskad-compile,savant-compile,qd-compile,tt-standalone-compile,tt-handheld-compile,tt-applet-plus-jws-compile,tt-servlet-compile"
+          description="compiles all programs" />
 
 
   <target name="jskad-compile" depends="init"
@@ -270,15 +271,23 @@
   </target>
 
 
-  <target name="tt-servlet-compile" depends="init"
-          description="compiles the servlet form of the Translation Tool.  You'd better set the j2ee.sdk.home property first or have j2ee.jar on your CLASSPATH, because this is a J2EE program." >
+  <target name="tt-servlet-compile"
+          depends="ttsc-init"
+          if="found.j2ee.jar"
+          description="compiles the servlet form of the Translation Tool if you've set the j2ee.sdk.home property correctly" >
+    <path id="ttsc.class.path">
+      <pathelement location="${j2ee.sdk.home}/j2ee.jar"/>
+      <path refid="entire.class.path"/>
+    </path>
     <antcall target="our-internal-javac-task">
+      <reference torefid="ttsc.class.path" refid="ttsc.class.path"/>
+      <param name="our.javac.classpathref" value="ttsc.class.path"/>
       <param name="mybin" value="${ttservletbin}"/>
       <param name="my.included.source.file"
              value="org/thdl/tib/scanner/ConsoleScannerFilter.java"/>
     </antcall>
     <antcall target="copy-license-etc-to-bin-dir-for-jarring">
-      <param name="mybin" value="${ttbin}"/>
+      <param name="mybin" value="${ttservletbin}"/>
     </antcall>
   </target>
 
@@ -393,6 +402,7 @@
 
 
   <target name="tt-servlet-dist" depends="tt-servlet-compile"
+          if="found.j2ee.jar"
           description="generates the servlet translation tool's binary distribution." >
     <!-- Put everything in ${ttservletbin} into the JAR file -->
     <jar jarfile="${dist}/lib/DictionarySearchServlet-${my.jar.suffix}.jar"
@@ -639,6 +649,12 @@
   </target>
 
 
+  <target name="ttsc-init" depends="init"
+          description="used internally to set a property when the J2EE SDK is installed in a place where we can find it.  In that case, we can build servlets.">
+    <available file="${j2ee.sdk.home}/j2ee.jar" property="found.j2ee.jar"/>
+  </target>
+
+
   <!-- -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* -->
   <!-- UTILITY TARGETS - targets of antcalls, targets not usually
        directly called. -->
@@ -738,7 +754,7 @@
 
 
     <javac destdir="${mybin}" debug="${javacdashg}" target="${target.jvm}">
-      <classpath refid="entire.class.path"/>
+      <classpath refid="${our.javac.classpathref}"/>
       <src path="${source}"/>
       <include name="${my.included.source.file}" />