Simple decryption script

decrypt.sh

#!/bin/bash

# Copyright (C) 2018-2019 Ivan Cao-Berg
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; either version 2 of the License,
# or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

if [ $# -ne 1 ]; then
        echo "Simple decryption script that takes exactly one input argument."
        cowsay -f tux "Example"
        echo "~/bin/decrypt.sh foobar.jpg.gpg"
        exit
fi

FILE=$1

if [[ "$FILE" = *"gpg"* ]]; then
	gpg -d "$FILE" > "${FILE%.*}"
	if [ -f "$FILE" ]; then
		rm -fv "$FILE"
	fi
else
	echo "File "$FILE" is not encrypted."
fi