Pre-commit hook to format using prettier-eslint

pre-commit-prettier-eslint

#!/bin/sh
#
# Place in `.git/hooks/pre-commit`
# Make it executable: `chmod +x .git/hooks/pre-commit`

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

if [[ "$STAGED_FILES" = "" ]]; then
  echo "\nNo JS files to format.\n"
  exit 0
fi

PASS=true

echo "\nFormatting JS files...\n"

# Check for eslint
which prettier-eslint &> /dev/null
if [[ "$?" == 1 ]]; then
  echo "\t\033[41mPlease install prettier-eslint\033[0m"
  exit 1
fi

for FILE in $STAGED_FILES
do
  prettier-eslint "$FILE" --write --prettier.bracketSpacing=true --prettier.semi=false

  if [[ "$?" == 0 ]]; then
    echo "\t\033[32mFormatted: $FILE\033[0m"
  else
    echo "\t\033[41mFailed: $FILE\033[0m"
    PASS=false
  fi
done

echo "\nComplete.\n"

if ! $PASS; then
  echo "\033[41mCOMMIT FAILED:\033[0m Your commit contains errors.\n"
  exit 1
else
  echo "\033[42mCOMMIT SUCCEEDED\033[0m\n"
fi

exit $?