Script to test reproducibility of git-archive-all.sh and git's built-in archive command

reproducibility-test.sh

#!/bin/bash

# Script to test reproducibility of git-archive-all.sh and git's built-in
# archive command
#
# Usage:
#   1. Copy the script to your git directory with submodules.
#   2. Download the git-archive-all.sh script:
#      https://raw.githubusercontent.com/meitar/git-archive-all.sh/master/git-archive-all.sh
#      and place it somewhere in your $PATH and make it executable.
#   3. Run the script.
# 
# Note: The git's built-in archive command doesn't archive the submodules, it
#       is only used here to show it is reproducible.
#
# Author: Tadej Janež <tadej.j@nez.si>
#
# License: GPLv3+

TMPDIR=$(mktemp -d /tmp/reproducibility_test.XXXXXX)
for i in {1..3}; do
    git-archive-all.sh --format tar --tree-ish HEAD $TMPDIR/git-archive-all-tar_only-$i.tar
    git-archive-all.sh --format tar.gz --tree-ish HEAD $TMPDIR/git-archive-all-tar_with_gzip-$i.tar.gz
    git-archive-all.sh --format zip --tree-ish HEAD $TMPDIR/git-archive-all-zip-$i.zip
    git archive --format=tar --output $TMPDIR/git-archive-tar_only-$i.tar HEAD
    git archive --format=tar.gz --output $TMPDIR/git-archive-tar_with_gzip-$i.tar.gz HEAD
    git archive --format=zip --output $TMPDIR/git-archive-zip-$i.zip HEAD
done
pushd $TMPDIR
md5sum *
popd
rm -r $TMPDIR