#!/bin/bash
# Set up with `pushd .git/hooks; ln -s ../../hooks/pre-commit pre-commit; popd`

set -eux

if git rev-parse --verify HEAD >/dev/null 2>&1
then
	against=HEAD
else
	# Initial commit: diff against an empty tree object
	against=$(git hash-object -t tree /dev/null)
fi
# cat always has error code 0
# ignore deleted files (can't be formatted)
filenames=$(git diff --cached --name-only --diff-filter=d $against | grep '\.py$' | cat)
# If changed files include scrapscript.py, run tests
if echo $filenames | grep scrapscript
then
  python3 ./scrapscript_tests.py
fi

# If there are any other changed Python files, make sure they lint
if [ -n "$filenames" ]
then
  ruff format --check $filenames
  ruff check $filenames
  mypy --strict $filenames
fi