[PWGEM/Dilepton] update prefilter task (#8889) #717

	---
	# Find issues in O2 code
	name: O2 linter

	'on': [pull_request, push]
	permissions: {}
	env:
	MAIN_BRANCH: master

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	o2-linter:
	name: O2 linter
	runs-on: ubuntu-24.04
	steps:
	- name: Checkout Code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # needed to get the full history
	- name: Run tests
	run: \|
	# Diff against the common ancestor of the source branch and the main branch.
	readarray -t files < <(git diff --diff-filter d --name-only origin/${{ env.MAIN_BRANCH }}...)
	if [ ${#files[@]} -eq 0 ]; then
	echo "::notice::No files to lint."
	exit 0
	fi
	[ ${{ github.event_name }} == 'pull_request' ] && options="-g"
	# shellcheck disable=SC2086 # Ignore unquoted options.
	python3 Scripts/o2_linter.py $options "${files[@]}"
	echo "Tip: If you allow actions in your fork repository, O2 linter will run when you push commits."

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