# use it as: > squash_last_n_commits 2

squash_last_n_commits()
{
	if [ $# -ne 1 ] || [ "$1" -lt 2 ]; then
		echo 'squash_last_n_commits() requires a number (>1) as the only argument ("HEAD~$1")'
	else
		echo "Creating '__pre_squash__state__' tag, just in case."
		git tag "__pre_squash__state__"
		git reset --soft HEAD~$1 &&
		git commit --edit -m"$(git log --format=%B --reverse HEAD..HEAD@{1})"
		if [ $? -ne 0 ]; then
			echo "Squash operation aborted. Resetting to previous state."
			git reset "__pre_squash__state__"
		fi
		git tag -d "__pre_squash__state__"
	fi
}