fix: missing returns, TopicMessage constructor #2

	name: Generate MQTT topics dev-build

	on:
	workflow_dispatch:
	push:
	branches:
	- dev

	jobs:
	library:
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: 3.x

	- name: Run generator
	run: \|
	sudo apt-get install -y graphviz
	pip install -r requirements.txt
	python3 src/generator/main.py . out
	mkdir -p /tmp/workspace
	cp -R out/* /tmp/workspace

	- uses: actions/checkout@v2
	with:
	ref: dev-build

	- name: Push generated files
	id: commit
	run: \|
	git config --global user.name 'github-actions[bot]'
	git config --global user.email 'github-actions[bot]@users.noreply.github.com'
	git rm -r --ignore-unmatch /
	rm -rf *
	cp -r /tmp/workspace/* .
	git add .
	if [[ $(git status --porcelain) ]]; then git commit -am "chore: automatically generated files" && git push; fi
	echo "::set-output name=HASH::$(git rev-parse HEAD)"

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