Public Object: Stupid Bash Tricks: Find a file in a pile of jars

Stupid Bash Tricks: Find a file in a pile of jars

My latest code depends on ServiceMBeanSupport.class from JBoss. The problem is that JBoss is composed of dozens of .jar files and I'm not sure which one contains the file I'm interested in.

Tools

find this command will list all the files that meet the specified metadata. It can also execute a command for each file found, using that filename as a parameter. For example, to remove all the CVS folders in a directory tree, type find . -name CVS -exec rm -rf {} \; . Find will substitute {} for the file that's found and it needs \; to designate the end of the command.

grep give input text, grep prints only the lines that match my regular expression.

bash -c executes the bash shell. This can be used with find -exec to run multiple commands in sequence

jar tvf print all the files in a .jar file

Find my file in a jar

jar tvf jarfile | grep ServiceMBeanSupport.class

This will tell me if the file is in the jar file or not. Its a start.

Find my file in all the .jar files in the current directory or deeper

find . -name *.jar -exec jar tvf {} | grep ServiceMBeanSupport.class \;

This will tell me if the file is in any of the jarfiles. Unfortunately it doesn't tell me which jarfile it is in, since it just prints the contents of the jarfiles and not their names.

The Command

find . -name *.jar -exec bash -c "echo {} && jar tvf {} | grep ServiceMBean " \;

This writes the name of the jar file, followed by any matching file's that are in it. So if I search for ServiceMBean, I get a list like this:

./client/jboss-iiop-client.jar

...

./client/jboss-net-client.jar

./client/jboss-system-client.jar

./client/jboss-transaction-client.jar

./client/jbossall-client.jar

   795 Fri Jun 25 19:55:16 EDT 2004 org/jboss/jmx/adaptor/rmi/RMIAdaptorServiceMBean.class

  1331 Fri Jun 25 19:55:16 EDT 2004 org/jboss/jmx/connector/ConnectorFactoryServiceMBean.class

./lib/jboss-system.jar

   603 Fri Jun 25 19:54:38 EDT 2004 org/jboss/system/ListenerServiceMBean.class

  1745 Fri Jun 25 19:54:38 EDT 2004 org/jboss/system/ListenerServiceMBeanSupport$MBeanInfo.class

 10950 Fri Jun 25 19:54:38 EDT 2004 org/jboss/system/ListenerServiceMBeanSupport.class

  1309 Fri Jun 25 19:54:38 EDT 2004 org/jboss/system/ServiceMBean.class

  9523 Fri Jun 25 19:54:38 EDT 2004 org/jboss/system/ServiceMBeanSupport.class

...

And my work is done for the day. Cool, eh?

# posted by Jesse Wilson on Friday, December 17, 2004

Put this script on your path in a file called 'findinjar' and chmod u+x the file:

#!/bin/bash
find . -name *.jar -exec bash -c "echo {} && jar tvf {} | grep $1" \;

# posted by swankjesse on December 17, 2005 8:41 PM

Try this:

#!/bin/bash
find "$1" -name "*.jar" -a -exec bash -c "jar tvf {} | grep $2" \; -print

This takes a dir and a match string and _only_ outputs lines and files that match

or change the "grep $2" to:
grep -m 1 $2 > /dev/null

and it will only output matching file names

gcowsar

# posted by Anonymous on July 14, 2006 1:30 PM

This was just what I looked for...

Here is a small improvement to show only the jars that do contain the file (helps if you search through a lot of jars)

find . -name *.jar -exec bash -c "echo {}: && jar tvf {} | grep $1 ; echo __DELIMITER__ " \; | awk 'BEGIN { FS="\n"; RS="\n__DELIMITER__" }; NF > 2 '

# posted by Erez Lotan on November 16, 2006 8:20 AM