renaming macos to Darwin #363

	name: Lint

	on:
	pull_request:
	branches: [main]
	types: [opened, synchronize]

	permissions: read-all

	jobs:
	flake8-lint:
	runs-on: ubuntu-latest
	name: Lint
	steps:
	- name: Check out source repository
	uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
	- name: Set up Python environment
	uses: actions/setup-python@82c7e631bb3cdc910f68e0081d67478d79c6982d # v5.1.0
	with:
	python-version: "3.11"
	- name: flake8 Lint
	uses: py-actions/flake8@84ec6726560b6d5bd68f2a5bed83d62b52bb50ba # v2.3.0
	- name: Detect empty lines at end of file and trailing whitespace
	run: \|
	set -euxo pipefail # No -x here!
	failed=0
	# First, check for empty files at end
	for file in $(git ls-files --eol \| grep 'i/[cr]*lf' \| awk '{print $4}'); do
	lines=$(tac "$file" \| awk 'NF{exit};END{print NR?NR-1:0}')
	if [[ $lines -ne 0 ]]; then
	line=$(wc -l "$file" \| cut -d' ' -f1)
	echo "::error file=$file,line=$line::File $file has $lines empty lines at end. Please remove."
	failed=$((failed + 1))
	fi
	done
	# Next, check for files with whitespace at end of line. Remove CRLF files.
	for file in $(git ls-files --eol \| grep 'i/lf' \| awk '{print $4}'); do
	for line in $(grep -n '[[:space:]]$' "$file" \| cut -d: -f1); do
	echo "::error file=$file,line=$line::File $file has trailing whitespace at line $line. Please remove."
	failed=$((failed + 1))
	done
	done
	if [[ $failed -ne 0 ]]; then
	echo "::error Found $failed whitespace errors, failing"
	exit 1
	fi

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