--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bin/jsshrink.sh	Thu Jan 04 15:52:31 2018 -0500
@@ -0,0 +1,77 @@
+#!/bin/sh
+PWD=`dirname "$0"`
+JS_DIR="$PWD/../program/js"
+JAR_DIR='/tmp'
+LANG_IN='ECMASCRIPT3'
+# latest version requires Java 7, we'll use an older one
+#CLOSURE_COMPILER_URL='http://dl.google.com/closure-compiler/compiler-latest.zip'
+CLOSURE_COMPILER_URL='http://dl.google.com/closure-compiler/compiler-20131014.zip'
+
+do_shrink() {
+	rm -f "$2"
+	# copy the first comment block with license information for LibreJS
+	grep -q '@lic' $1 && sed -n '/\/\*/,/\*\// { p; /\*\//q; }' $1 > $2
+	java -jar $JAR_DIR/compiler.jar --compilation_level=SIMPLE_OPTIMIZATIONS --js="$1" --language_in="$3" >> $2
+}
+
+if [ ! -d "$JS_DIR" ]; then
+	echo "Directory $JS_DIR not found."
+	exit 1
+fi
+
+if [ ! -w "$JAR_DIR" ]; then
+	JAR_DIR=$PWD
+fi
+
+if java -version >/dev/null 2>&1; then
+	:
+else
+	echo "Java not found. Please ensure that the 'java' program is in your PATH."
+	exit 1
+fi
+
+if [ ! -r "$JAR_DIR/compiler.jar" ]; then
+	if which wget >/dev/null 2>&1 && which unzip >/dev/null 2>&1; then
+		wget "$CLOSURE_COMPILER_URL" -O "/tmp/$$.zip"
+	elif which curl >/dev/null 2>&1 && which unzip >/dev/null 2>&1; then
+		curl "$CLOSURE_COMPILER_URL" -o "/tmp/$$.zip"
+	else
+		echo "Please download $CLOSURE_COMPILER_URL and extract compiler.jar to $JAR_DIR/."
+		exit 1
+	fi
+	(cd $JAR_DIR && unzip "/tmp/$$.zip" "compiler.jar")
+	rm -f "/tmp/$$.zip"
+fi
+
+# compress single file from argument
+if [ $# -gt 0 ]; then
+	JS_DIR=`dirname "$1"`
+	JS_FILE="$1"
+
+	if [ $# -gt 1 ]; then
+		LANG_IN="$2"
+	fi
+
+	echo "Shrinking $JS_FILE"
+    minfile=`echo $JS_FILE | sed -e 's/\.js$/\.min\.js/'`
+	do_shrink "$JS_FILE" "$minfile" "$LANG_IN"
+	exit
+fi
+
+DIRS="$PWD/../program/js $PWD/../skins/* $PWD/../plugins/* $PWD/../plugins/*/skins/*"
+# default: compress application scripts
+for dir in $DIRS; do
+    for file in $dir/*.js; do
+        echo "$file" | grep -e '.min.js$' >/dev/null
+        if [ $? -eq 0 ]; then
+            continue
+        fi
+        if [ ! -f "$file" ]; then
+            continue
+        fi
+
+        echo "Shrinking $file"
+        minfile=`echo $file | sed -e 's/\.js$/\.min\.js/'`
+        do_shrink "$file" "$minfile" "$LANG_IN"
+    done
+done