[INTF23] Second choice tab queries and fixes #119

	name: Lint codebase

	on:
	push:
	branches:
	- main
	paths:
	- "backend/typescript/**"
	- "backend/python/**"
	pull_request:
	branches:
	- main
	paths:
	- "backend/typescript/**"
	- "backend/python/**"

	jobs:
	run-lint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v2

	- name: Filter changed files
	uses: dorny/paths-filter@v2
	id: changes
	with:
	filters: \|
	typescript-backend:
	- "backend/typescript/**"
	python-backend:
	- "backend/python/**"

	- name: Set up Node.js
	if: steps.changes.outputs.typescript-backend == 'true'
	uses: actions/setup-node@v2
	with:
	node-version: "14.15.5"
	cache: "yarn"
	cache-dependency-path: \|
	backend/typescript/yarn.lock

	- name: Install Node.js dependencies
	if: steps.changes.outputs.typescript-backend == 'true'
	run: yarn --cwd ./backend/typescript --prefer-offline

	- name: Lint TypeScript backend
	if: steps.changes.outputs.typescript-backend == 'true'
	working-directory: ./backend/typescript
	run: yarn lint

	- name: Lint Python backend
	if: steps.changes.outputs.python-backend == 'true'
	working-directory: ./backend/python
	run: pip install black && python -m black --check .

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