Creating a GPG signed archive of your GIT source code with SHA 256 checksums in bash

gitarchive.sh

#!/bin/bash

# Getting the current project's directory
pf=$(printf '%q\n' "${PWD##*/}")

# Getting the current configured user's email
gpguser=$(git config user.email)
if [ -z $gpguser ]
then
    echo "!!! ERROR: No user for GIT configured !!!"
    echo "    You might want to set 'git config user.email <user@domain.tld>'"
    exit 1
fi

# Looking up their GPG key ID
gpgid=$(gpg --list-keys --keyid-format LONG $gpguser | grep "^      " | sed 's/\ //g')
if [ -z $gpgid ]
then
    echo "!!! ERROR: Couldn't find matching GPG ID for user $gpguser !!!"
    exit 1
fi

# Clean up
rm -f $pf.zip
rm -f $pf.zip.asc
rm -f $pf.tar.gz
rm -f $pf.tar.gz.asc
rm -f $pf.sum

# Running archive
for format in zip tar.gz
do
    git archive --format=$format --prefix=$pf/ --output=$pf.$format HEAD
    shasum -a 256 $pf.$format >> $pf.sum
    gpg --detach-sign -a -u $gpgid $pf.$format
done
exit 0