precommit hook for eslint and stylelint

pre-commit

#!/bin/bash

## PRECOMMIT LINTING
# list staged files
STAGED_FILES_TS="$(git diff --cached --name-only | grep "\.ts$")"
STAGED_FILES_SCSS="$(git diff --cached --name-only | grep "\.scss$")"
STAGED_FILES_VUE="$(git diff --cached --name-only | grep "\.vue$")"
# Define helper variables
PASS_LINT=true
PASS_STAGING_COMPARATION=true
RED='\033[41m'
GREEN='\033[0;32m'
NC='\033[0m'

printf "Running Linters: \n"

# # Run tslint for scss and get the output and return code
if  [[ -n "$STAGED_FILES_TS" ]]; then
	printf "Running tslint \n"
	tslint=$(yarn tslint $STAGED_FILES_TS)
	ret_code=$?

	# If it didn't pass, announce it failed and print the output
	if [ $ret_code != 0 ]; then
		printf "${RED}tslint failed:${NC} \n"
		printf "$tslint \n"
		PASS_LINT=false
	else
		printf "${GREEN}tslint passed.${NC} \n"
	fi
fi
# Run stylelint for scss and vue, get the output and return code

if  [[ -n "$STAGED_FILES_SCSS" ]] || [[ -n "$STAGED_FILES_VUE" ]]; then
	printf "Running stylelint \n"
	stylelint=$(yarn stylelint $STAGED_FILES_SCSS $STAGED_FILES_VUE)
	ret_code=$?
	# If it didn't pass, announce it failed and print the output
	if [ $ret_code != 0 ]; then
		printf "${RED}Stylelint failed:${NC} \n"
		printf "$stylelint \n"
		PASS_LINT=false
	else
		printf "${GREEN}Stylelint passed.${NC} \n"
	fi
fi
# Check if staged files differ from working tree
ALL_STAGED_FILES="$(git diff --cached --name-only)"

for file in $ALL_STAGED_FILES 
	do
	compared_file=$(git diff --color --name-only $file)
	if [[ -n $compared_file ]]; then
		printf "${RED}Staged file differs from working directory:${NC} $file. \n"
		PASS_STAGING_COMPARATION=false
	fi

	if $PASS_STAGING_COMPARATION; then
		printf "${GREEN}Staged files don't differ from working directory${NC} \n"
	fi
done

# Fail commit if necessary
if ! $PASS_LINT; then
  printf "${RED}COMMIT FAILED:${NC} Your commit contains files that should pass ESLint but do not. Please fix the ESLint errors and try again. \n"
  exit 1
elif ! $PASS_STAGING_COMPARATION; then
	printf "${RED}COMMIT FAILED:${NC} Your commit contains files that have been changed after staging. Please stage them and try again. \n"
	exit 1
else
  printf "${GREEN}COMMIT SUCCEEDED${NC} \n"
fi
exit 0