Bash script to search a Java classpath for files with a regex

search-classpath.sh

#!/bin/bash

set -euo pipefail
IFS=$'\n\t'

# Use like:
# LCP=$(lein classpath) # in case you need to rerun it and don't want to wait on Leiningen
# search-classpath.sh $LCP tools.reader
# search-classpath.sh $LCP Reader.class
# ...etc

function print_matches() {
    if [ -n "$2" ]; then
        echo "Found in: ${1}:"

        for match in $2; do
            if [ $# -gt 2 ] && [ -n "$3" ]; then
                output="${match#${3}}"
                output="${output#/}"
            else
                output="${match}"
            fi
            printf '\t%s\n' "${output}"
        done
    fi
}

for P in $(echo "${1}" | tr ':' '\n'); do
    if [[ "${P}" =~ \.jar$ ]]; then
        JARPATHS=$(jar tf "${P}" | grep -i "${2}" || true)
        print_matches "${P}" "${JARPATHS}"
    elif [ -d "$P" ]; then
        FINDPATHS=$(find "${P}" -iname "*${2}*" || true)
        print_matches "${P}/" "${FINDPATHS}" "${P}"
    fi
done