Pre commit hook for ensuring files get built before committing.

pre-commit-gulp.bash

#!/usr/bin/env bash
#
# Commands to be run before a commit can be made to the repository:
#
# Make sure gulp build always runs before commiting.

# Constants for terminal colors
GREEN='\033[00;32m'
YELLOW='\033[00;93m'
RED='\033[00;91m'
END='\033[0m'

# Grab unstaged files before running gulp build.
git diff --name-only --diff-filter=ACMRTUXB > /tmp/unstaged1

# Lets get minifying.
echo "Running gulp build..."
gulp build --staged
if [ $? != 0 ]
then
	# Abort commit if something went wrong.
	exit 1
fi

# Grab unstaged files after running gulp build.
git diff --name-only --diff-filter=ACMRTUXB > /tmp/unstaged2

# Check if any new minified files got created. If so...
if [ $(comm -3 /tmp/unstaged1 /tmp/unstaged2  | LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0 ]
then
	# Prompt user to add new files and abort commit.
	echo -e ""
	echo -ne "${RED}Please commit newly minified files${END}:"
	echo -e ""
	comm -3 /tmp/unstaged1 /tmp/unstaged2
	echo -e ""
	exit 1
fi