fix some nits in CtagsUtil + fix build #2615

	name: Build Docker image

	on: [push, pull_request]

	jobs:
	ubuntu:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout master branch
	uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: '3.10'
	- name: Install dependencies
	run: python3 -m pip install -r docker/requirements.txt
	- name: Install opengrok-tools so that pylint can perform the checks
	run: python3 -m pip install .
	working-directory: tools
	- name: Install checkers
	run: python3 -m pip install pylint flake8 black isort
	- name: Run flake8
	run: flake8 --max-line-length 119 docker/*.py
	- name: Run pylint
	run: pylint -E --max-line-length 119 docker/*.py
	- name: Run black in check mode
	run: black --check docker/*.py
	- name: Run isort in check mode
	run: isort --settings-file docker/.isort.cfg docker/*.py --check --diff
	- name: Build and optionally push Docker image
	env:
	DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
	DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
	OPENGROK_REPO_SLUG: ${{ github.repository }}
	OPENGROK_PULL_REQUEST: ${{ github.head_ref }}
	OPENGROK_REF: ${{ github.ref }}
	run: ./dev/docker.sh
	- name: Install Python pre-requisites
	run: python3 -m pip install requests
	- name: Optionally update README on Docker hub
	env:
	OPENGROK_REPO_SLUG: ${{ github.repository }}
	OPENGROK_PULL_REQUEST: ${{ github.head_ref }}
	DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
	DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
	run: ./dev/dockerhub_readme.py

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