Rollup for java clustering

workflow/apps/java/clustering/build

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+#
+# On rpm, you'll need:
+#
+# * java-devel
+# * javapackages-tools
+# * ecj
+#
+
+dirs=(bin lib src)
+name="weka-clustering.jar"
+weka_version="3.8.6"
+weka_version_hyphen="3-8-6"
+
+[[ -f $name ]] && mv "$name" "$name.bk"
+
+[[ -d src ]] || (echo "This script requires the input java files in src"; exit)
+
+rm -rf bin
+
+for d in "${dirs[@]}"; do
+  [[ -d $d ]] || mkdir "$d"
+done
+
+# Download and extract weka.jar to the lib dir
+wget -qO temp.zip "https://sourceforge.net/projects/weka/files/weka-${weka_version_hyphen%-*}/$weka_version/weka-$weka_version_hyphen.zip/download" &&
+unzip -o -j temp.zip weka-$weka_version_hyphen/weka.jar -d lib &&
+rm temp.zip
+
+# Build the classes from source java
+ecj -17 -classpath lib/weka.jar -d bin src &&
+
+# Add weka classes to the bin
+unzip -o lib/weka.jar -d bin &&
+
+# Create the jar file from the classes
+jar cf "$name" -C bin .