Filter dependencies from partest and scalacheck.

I previously messed this up in a24e7fa, which caused
partest classpath again to include multiple version
of scala-library and friends.

We should really automate enforcing uniqueness of packages.

Author: adriaanm

build.xml

@@ -286,10 +286,13 @@ TODO:
           -->
         <!-- <artifact:remoteRepository refid="extra-repo"/> -->
         <dependency groupId="org.scala-lang.modules" artifactId="scala-partest_${scala.binary.version}" version="${partest.version.number}" />
-        <dependency groupId="org.scalacheck"         artifactId="scalacheck_${scala.binary.version}"    version="${scalacheck.version.number}" />
       </artifact:dependencies>
       <copy-deps project="partest"/>
 
+      <artifact:dependencies pathId="scalacheck.classpath" filesetId="scalacheck.fileset" versionsId="scalacheck.versions">
+        <dependency groupId="org.scalacheck"         artifactId="scalacheck_${scala.binary.version}"    version="${scalacheck.version.number}" />
+      </artifact:dependencies>
+
       <artifact:dependencies pathId="repl.deps.classpath" filesetId="repl.fileset" versionsId="repl.deps.versions">
         <dependency groupId="jline" artifactId="jline" version="${jline.version}"/>
       </artifact:dependencies>
@@ -894,11 +897,30 @@ TODO:
       <pathelement location="${actors.jar}"/>
 
       <!-- partest's dependencies, which marks most of its dependencies as provided,
+           (but not scala-library, so we filter that one out...)
            so we provide them: scala-[library/reflect/compiler], scalap built here,
            scala-xml, scala-parser-combinators via external-modules-nocore,
            scalacheck as part of `partest.classpath` -->
-      <path refid="partest.classpath"/>
-      <path refid="external-modules-nocore"/> <!-- xml, parsers -->
+      <restrict>
+        <path refid="partest.classpath"/>
+        <rsel:not><rsel:or>
+          <rsel:name name="scala-library*.jar"/>
+        </rsel:or></rsel:not>
+      </restrict>
+      <pathelement location="${scala-xml}"/>
+      <pathelement location="${scala-parser-combinators}"/>
+
+      <restrict>
+        <path refid="scalacheck.classpath"/>
+        <rsel:not><rsel:or>
+          <rsel:name name="scala-library*.jar"/>
+          <rsel:name name="scala-compiler*.jar"/>
+          <rsel:name name="scala-reflect*.jar"/>
+          <rsel:name name="scala-actors*.jar"/>
+          <rsel:name name="scala-parser-combinators*.jar"/>
+          <rsel:name name="scala-xml*.jar"/>
+        </rsel:or></rsel:not>
+      </restrict>
 
       <!-- partest classes specific to the core compiler build -->
       <pathelement location="${partest-extras.jar}"/>