Update fetch #12

	name: Build and publish docs
	on:
	push:
	branches:
	- main
	- add-docs
	jobs:
	deploy:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Check if docs changed
	id: changes
	run: \|
	git fetch --all
	git diff --quiet origin/main -- docs
	echo ::set-output name=docs::$(test $? -ne 0 && echo 'true' \|\| echo 'false')
	- uses: actions/setup-python@v2
	if: steps.changes.outputs.docs == 'true'
	with:
	python-version: 3.x
	- name: Install Poetry
	if: steps.changes.outputs.docs == 'true'
	run: \|
	pip install -U pip
	pip install poetry
	poetry config virtualenvs.create false
	poetry install --with docs
	- name: Deploy to GitHub Pages
	if: steps.changes.outputs.docs == 'true'
	run: poetry run mkdocs gh-deploy --force

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