Make a more specific common case; other small improvements.

Moved paths, taskdefs into specific init targets.
Restructured init task flow.
Created defaults for required properties.
Added echo messages to library resolution.
Targets now create their required directories before trying to use them.

jdb-build-1.5.xml

@@ -3,44 +3,56 @@
 
     <property environment="env"/>
 
-    <!--======== PATHS ========-->
-    <path id="groovy.classpath">
-        <fileset dir="${env.GROOVY_HOME}/lib">
-            <include name="*.jar"/>
-        </fileset>
-    </path>
-
-    <path id="groovy.embeddable">
-        <fileset dir="${env.GROOVY_HOME}/embeddable">
-            <include name="*.jar"/>
-        </fileset>
-    </path>
-
-    <path id="compile-libs">
-        <fileset dir="${build.dir}/lib/compile/jar">
-            <include name="*.jar"/>
-        </fileset>
-    </path>
-
-    <path id="runtime-libs">
-        <fileset dir="${build.dir}/lib/runtime/jar">
-            <include name="*.jar"/>
-        </fileset>
-    </path>
-
     <!--======== INIT TARGETS ========-->
     <target name="-init" depends="-common-init,init"/>
 
     <target name="-common-init">
+        <!-- Set default values for some key properties. Since properties are
+             write once, any value set before this point takes precedence. -->
+
         <property name="versioning.file" value="project.properties"/>
+
+        <property name="src.dir" value="${basedir}/src"/>
+        <property name="build.dir" value="${basedir}/build"/>
+        <property name="lib.dir" value="${basedir}/lib"/>
+        <property name="resources.dir" value="${basedir}/resources"/>
+
+        <!--======== PATHS ========-->
+        <path id="groovy.classpath">
+            <fileset dir="${env.GROOVY_HOME}/lib">
+                <include name="*.jar"/>
+            </fileset>
+        </path>
+
+        <path id="groovy.embeddable">
+            <fileset dir="${env.GROOVY_HOME}/embeddable">
+                <include name="*.jar"/>
+            </fileset>
+        </path>
+
+        <path id="compile-libs">
+            <fileset dir="${build.dir}/lib/compile/jar">
+                <include name="*.jar"/>
+            </fileset>
+        </path>
+
+        <path id="runtime-libs">
+            <fileset dir="${build.dir}/lib/runtime/jar">
+                <include name="*.jar"/>
+            </fileset>
+        </path>
+
     </target>
 
     <target name="-init-groovy">
         <taskdef name="groovyc" classpathref="groovy.classpath"
             classname="org.codehaus.groovy.ant.Groovyc"/>
+
+        <taskdef name="groovy" classpathref="groovy.classpath"
+            classname="org.codehaus.groovy.ant.Groovy"/>
     </target>
 
-    <target name="clean">
+    <target name="clean" depends="-init">
         <delete dir="${build.dir}"/>
     </target>
 
@@ -50,11 +62,14 @@
     <target name="-lib-ivy" unless="${lib.local}"/>
 
     <target name="-lib-local" if="${lib.local}">
-        <copy todir="${build.dir}/lib/compile/jar">
+        <echo message="Resolving libraries locally."/>
+        <mkdir dir="${build.dir}/lib/compile/jar"/>
+        <mkdir dir="${build.dir}/lib/runtime/jar"/>
+        <copy todir="${build.dir}/lib/compile/jar" failonerror="false">
             <fileset dir="${lib.dir}/compile/jar"/>
         </copy>
 
-        <copy todir="${build.dir}/lib/runtime/jar">
+        <copy todir="${build.dir}/lib/runtime/jar" failonerror="false">
             <fileset dir="${lib.dir}/runtime/jar"/>
         </copy>
     </target>
@@ -79,7 +94,8 @@
 
     <!--======== COMPILATION TARGETS ========-->
     <target name="-compile-groovy" depends="-init,-init-groovy,lib">
-        <groovyc srcdir="${src.dir}" destdir="${build.dir}/main/classes"
+        <mkdir dir="${build.dir}/main/classes"/>
+        <groovyc srcdir="${src.dir}/main" destdir="${build.dir}/main/classes"
             includeAntRuntime="false">
 
             <classpath>
@@ -91,7 +107,8 @@
     </target>
 
     <target name="-compile-java" depends="-init,lib">
-        <javac srcdir="${src.dir}" destdir="${build.dir}/main/classes"
+        <mkdir dir="${build.dir}/main/classes"/>
+        <javac srcdir="${src.dir}/main" destdir="${build.dir}/main/classes"
             includeAntRuntime="false" classpathref="compile-libs"/>
     </target>
 
@@ -99,7 +116,8 @@
 
     <!--======== JUNIT TARGETS ========-->
     <target name="-compile-tests-groovy" depends="-init,compile">
-        <groovyc srcdir="${test.dir}" destdir="${build.dir}/test/classes"
+        <mkdir dir="${build.dir}/test/classes"/>
+        <groovyc srcdir="${src.dir}/test" destdir="${build.dir}/test/classes"
             includeAntRuntime="false">
             
             <classpath>
@@ -111,7 +129,8 @@
     </target>
 
     <target name="-compile-tests-java" depends="-init,compile">
-        <javac srcdir="${test.dir}" destdir="${build.dir}/test/classes"
+        <mkdir dir="${build.dir}/test/classes"/>
+        <javac srcdir="${src.dir}/test" destdir="${build.dir}/test/classes"
             includeAntRuntime="false">
             <classpath>
                 <path refid="compile-libs"/>
@@ -142,13 +161,15 @@
     <!--======== RESOURCES TARGETS ========-->
     
     <target name="resources" depends="-init">
-        <copy todir="${build.dir}/main/classes">
+        <mkdir dir="${build.dir}/main/classes"/>
+        <copy todir="${build.dir}/main/classes" failonerror="false">
             <fileset dir="${resources.dir}/main/"/>
         </copy>
     </target>
 
     <target name="resources-test" depends="-init">
-        <copy todir="${build.dir}/test/classes">
+        <mkdir dir="${build.dir}/test/classes"/>
+        <copy todir="${build.dir}/test/classes" failonerror="false">
             <fileset dir="${resources.dir}/test/"/>
         </copy>
     </target>