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Script for finding a class inside a directory of JARs

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="$1"

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

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This entry was posted on Sunday, June 14th, 2009 at 6:43 pm and is filed under Programming. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

2 Responses to “Script for finding a class inside a directory of JARs”

  1. Josh says:
    June 15, 2009 at 10:16 am

    doesn’t http://javacio.us/ do this for you? Finds it in jars and in pom files (only for public repositories and jar files, though).

  2. Matthew McCullough says:
    June 17, 2009 at 1:15 pm

    Yup, javacio.us does something similar. But the reasoning for my script is that most of the time in my use-case, I have to search in private (company-internal) artifacts as well as commercials ones like BEA/Oracle JARs that would only exist in my HDD repo.