.git-pre-commit

#!/bin/bash
# Based on https://gist.github.com/dahjelle/8ddedf0aebd488208a9a7c829f19b9e8

for file in $(git diff --diff-filter=d --cached --name-only | grep -E '\.(js|jsx)$')
do
  git show ":$file" | npx eslint -c .eslintrc.yaml --stdin --stdin-filename "$file" # we only want to lint the staged changes, not any un-staged changes
  if [ $? -ne 0 ]; then
    echo "ESLint failed on staged file '$file'. Please check your code and try again. You can run ESLint manually via make lint."
    exit 1 # exit with failure status
  fi
done

echo "-> Javascript code passed linter"

UNPINNED=$(cat package.json | grep '\^\|~' | sed 's/,*$//g')
if [[ -n $UNPINNED ]]; then
    echo "Some Javascript packages are not pinned to a specific version:"
    echo
    echo "$UNPINNED"
    echo
    echo Please pin their versions by, e.g., removing operators such as \~ and ^.
    exit 1
else
    echo "-> Javascript versions correctly pinned"
fi