Snippet: grep-jar.sh

June 29, 2012 · unix gist

First draft of a script to grep for string inside jar (i.e. zgrep). I'm pretty sure there's a more elegant way of doing this, but this is functional.

#! /bin/sh
set -eu

if [ $# -ne 2 ] ; then
        echo "usage: $(basename $0) pattern path" > /dev/stderr
        echo "  list the jar, file within the jar, and line in the file, where the line matches the pattern" > /dev/stderr
        exit 1
fi

P=$1 ;# pattern
D=$2 ;# directory
T1=$TMP/$(basename $0)

for F in $(find "$D" -type f -name '*.jar') ; do
        echo "examining $F..."
        rm -Rf $T1
        mkdir $T1
        unzip -q "$F" -d "$T1"
        grep -R "$P" "$T1" || true
done