Looks for TLD files inside JAR files for Tomcat jar scanning configuration.

find-tld.sh

#!/bin/bash

# This attempts to look in all the jar files for any tag library description files (tlds).
# This is useful because to speed up tomcat startup you can stop if scanning everything
# and then add back in the files that are needed.

# This needs to be run on a tomcat folder that has unpacked wars as it won't find JARs inside
# WARs.

# It outputs the pattern to put in the `tldScan` attribute of the JAR scanner
# http://tomcat.apache.org/tomcat-8.5-doc/config/jar-scan-filter.html

( find . -name \*.jar | while read file; do 
if unzip -l $file | grep -q 'META-INF/.*\.tld'; then
        basename $file
fi
done ) | sed -E 's/([0-9]+[\._-]?)+(RELEASE|SNAPSHOT)?/*/;s/\*jar/*.jar/' | sort | uniq | paste -sd ',' -