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Script for finding a class inside a directory of JARs

Posted by: Matthew McCullough on 06/14/2009

In the spirit of automating anything I’ve done more than twice manually, here’s an incredibly simple yet useful little script to recursively search a tree of JARs for a class file. I most often use this against a local Maven repository.

#!/bin/sh

#Example Usages:
# findjars com/ambientideas/SuperWidget
# findjars AnotherWidget

CLASSNAMETOFIND=&amp;quot;$1&amp;quot;

echo &amp;quot;Searching all JARs recursively...&amp;quot;
for eachjar in `find . -iname &amp;quot;*.jar&amp;quot;`
do
  #echo &amp;quot;Searching in $eachjar ...&amp;quot;
  jar tvf $eachjar | grep $CLASSNAMETOFIND &amp;gt; /dev/null
  if [ $? == 0 ]
  then
    echo &amp;quot;******* Located &amp;quot;$CLASSNAMETOFIND&amp;quot; in $eachjar *******&amp;quot;
  fi
done

Matthew McCullough's complete blog can be found at: http://ambientideas.com/blog/

About Matthew McCullough

Matthew McCullough is an energetic 15 year veteran of enterprise software development, open source education, and co-founder of Ambient Ideas, LLC, a Denver consultancy. Matthew currently is a trainer for GitHub.com, author of the Git Master Class series for O'Reilly, speaker at over 30 national and international conferences, author of three of the top 10 DZone RefCards, and President of the Denver Open Source Users Group. His current topics of research center around project automation: build tools (Maven, Leiningen, Gradle), distributed version control (Git), Continuous Integration (Hudson) and Quality Metrics (Sonar). Matthew resides in Denver, Colorado with his beautiful wife and two young daughters, who are active in nearly every outdoor activity Colorado has to offer.

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