Tips and tricks

Without husky / lint-staged

If you want to do it without husky and lint-staged you just need this file in .githooks/pre-commit

#!/bin/sh
set -e

# Determine repository root
ROOT_DIR="$(git rev-parse --show-toplevel)"
echo "pre-commit: running in $ROOT_DIR"

# Collect staged files (added, copied, modified, renamed)
# Show raw list for debugging
STAGED_ALL=$(git diff --cached --name-only --diff-filter=ACMR)
echo "$STAGED_ALL" | sed 's/^/pre-commit: raw staged: /' || true

# Filter by extensions (case-insensitive) using awk for portability
STAGED_FILES=$(printf "%s\n" "$STAGED_ALL" | awk 'BEGIN{IGNORECASE=1} /\.(js|jsx|ts|tsx|json|css|scss|less|html|md|yml|yaml)$/')
echo "$STAGED_FILES" | sed 's/^/pre-commit: staged (filtered): /' || true

# Nothing to format
if [ -z "$STAGED_FILES" ]; then
  exit 0
fi

# Find a prettier binary (prefer workspace installs)
USE_NPX=0
if [ -x "$ROOT_DIR/business-library/node_modules/.bin/prettier" ]; then
  PRETTIER_BIN="$ROOT_DIR/business-library/node_modules/.bin/prettier"
elif [ -x "$ROOT_DIR/node_modules/.bin/prettier" ]; then
  PRETTIER_BIN="$ROOT_DIR/node_modules/.bin/prettier"
else
  USE_NPX=1
fi

echo "Running Prettier on staged files..."

# Format each staged file and add it back to the index
for FILE in $STAGED_FILES; do
  if [ $USE_NPX -eq 1 ]; then
    npx prettier --write "$FILE"
  else
    "$PRETTIER_BIN" --write "$FILE"
  fi
  git add "$FILE"
done

exit 0

if you want you can install prettier as a dev dependency locally or have it globally

npm i -D prettier

you can have a .prettierrc like:

{
  "bracketSpacing": true,
  "printWidth": 120,
  "proseWrap": "always",
  "quoteProps": "as-needed",
  "singleQuote": true,
  "tabWidth": 2,
  "trailingComma": "all",
  "useTabs": false
}

also you need this command to make it executable

chmod +x .githooks/pre-commit

set the hooks with

git config core.hooksPath .githooks

With husky / lint-staged

do this in /.husky/pre-commit

#!/bin/sh
# Source Husky shim if available (created by `husky install`), otherwise continue standalone
if [ -f "$(dirname -- "$0")/_/husky.sh" ]; then
  . "$(dirname -- "$0")/_/husky.sh"
fi

# Run lint-staged from business-library so it picks up its config
cd "$(git rev-parse --show-toplevel)/business-library" || exit 1

echo "husky: running lint-staged in $(pwd)"

# Prefer local binary if installed, fallback to npx
if [ -x "./node_modules/.bin/lint-staged" ]; then
  ./node_modules/.bin/lint-staged
else
  npx lint-staged
fi

In package.json you need the step inside “scripts”

    "prepare": "husky"

and

  "lint-staged": {
    "*.{ts,tsx,js,jsx,html,css,scss,json,md,yml,yaml}": "prettier --write"
  }