#!/usr/bin/env bash
set -e -o pipefail

shfmtflags="-bn -ci -sr"
# NOTE: `git grep '^#!'` may also pick up non-shell script files.
# Add exceptional files to `egrep -v` if any false-positive is detected.
if git grep --name-only '^#!' | egrep -v '(vendor|\.go|Jenkinsfile|\.py|\.bats)' \
	| xargs shfmt -d $shfmtflags; then
	echo 'Congratulations! The shell scripts are properly formatted.'
else
	echo "Please reformat the shell scripts with \`shfmt -w ${shfmtflags}\`."
	exit 1
fi