shellcheck.sh
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shellcheck.sh
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	#!/usr/bin/env bash

	# -------------------------------------------------------------
	# pre-commit :: hooks :: shellcheck
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# Project: Nasqueron
	# Forked from: gruntwork-io/pre-commit
	# Authors: 06kellyjac
	# Mark Butcher
	# Yevgeniy Brikman
	# Description: Call shellcheck as pre-commit hook
	# License: Apache License 2.0
	# -------------------------------------------------------------

	set -e

	exit_status=0
	enable_list=""
	severity="style"

	parse_arguments() {
	while (($# > 0)); do
	# Grab param and value splitting on " " or "=" with parameter expansion
	local PARAMETER="${1%[ =]*}"
	local VALUE="${1#*[ =]}"
	if [[ "$PARAMETER" == "$VALUE" ]]; then VALUE="$2"; fi
	shift
	case "$PARAMETER" in
	--enable)
	enable_list="$enable_list $VALUE"
	;;
	--severity)
	severity=$VALUE
	;;
	-*)
	echo "Error: Unknown option: $PARAMETER" >&2
	exit 1
	;;
	*)
	files="$files $PARAMETER"
	;;
	esac
	done
	enable_list="${enable_list## }" # remove preceeding space
	}

	parse_arguments "$@"

	for FILE in $files; do
	SHEBANG_REGEX='^#!$/\\|/./\\|/. $$\(ba\\|da\\|k\\|a$*sh\\|bats\)$'
	if (head -1 "$FILE" \| grep "$SHEBANG_REGEX" >/dev/null); then
	if ! shellcheck ${enable_list:+ --enable="$enable_list"} --severity="$severity" "$FILE"; then
	exit_status=1
	fi
	elif [[ "$FILE" =~ .+\.(sh\|bash\|dash\|ksh\|ash\|bats)$ ]]; then
	echo "$FILE: missing shebang"
	exit_status=1
	fi
	done

	exit $exit_status