I often want to search through a large number of JAR files looking for a particular class, and every time I do this I wish I had some utility to make it easier.Which inspired me to dust off my only part done equivalent and finish it up. So here's my version of Mark's utility. It's mostly the same - I just added a very simple cache so that you only have to read each jar file once.
#!/bin/sh TARGET="$1" CACHEDIR=~/.jarfindcache # prevent people from hitting Ctrl-C and breaking our cache trap 'echo "Control-C disabled."' 2 if [ ! -d $CACHEDIR ]; then mkdir $CACHEDIR fi for JARFILE in `find $PWD -name "*jar"` do CACHEFILE=$CACHEDIR$JARFILE if [ ! -s $CACHEFILE ]; then mkdir -p `dirname $CACHEFILE` nohup jar tvf $JARFILE > $CACHEFILE fi grep $TARGET $CACHEFILE > /dev/null if [ $? == 0 ] then echo "$TARGET is in $JARFILE" fi doneThanks for the inspiration Mark! Update: Mark enhanced the script to automatically update the cache whenever a jar file is changed. Get the updated script from Mark's blog Perhaps we should put this and our other clever tools in a public source code repository!