pre-commit-eslint

#!/bin/sh

# Black        0;30     Dark Gray     1;30
# Red          0;31     Light Red     1;31
# Green        0;32     Light Green   1;32
# Brown/Orange 0;33     Yellow        1;33
# Blue         0;34     Light Blue    1;34
# Purple       0;35     Light Purple  1;35
# Cyan         0;36     Light Cyan    1;36
# Light Gray   0;37     White         1;37

RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep ".js\{0,1\}$")

if [[ "$STAGED_FILES" = "" ]]; then
  exit 0
fi

PASS=true

printf "\nValidating Javascript:\n"

# Check for eslint
which eslint &> /dev/null
if [[ "$?" == 1 ]]; then
  printf "${RED}Please install ESlint\n"
  exit 1
fi

for FILE in $STAGED_FILES
do
  eslint "$FILE"

  if [[ "$?" == 0 ]]; then
    printf "${GREEN}ESLint Passed:${NC} $FILE\n"
  else
    printf "${RED}ESLint Failed:${NC} $FILE\n"
    PASS=false
  fi
done

printf "\nJavascript validation completed!\n"

if ! $PASS; then
  printf "${RED}COMMIT FAILED:${NC} Your commit contains files that should pass ESLint but do not. Please fix the ESLint errors and try again.\n"
  exit 1
else
  printf "${GREEN}COMMIT SUCCEEDED${NC}\n"
fi

exit $?