Update prepare_pages.yml: Re-deploy pages #773

	# (c) https://github.com/MontiCore/monticore
	name: Prepare And Deploy Pages

	# Preprocess the docs, build a site directory and push its contents to the gh-pages branch

	on:
	push:
	branches:
	- dev

	jobs:
	build:
	runs-on: ubuntu-latest
	env:
	GITLAB_TOKEN: ${{ secrets.GITLAB_TOKEN }}
	name: Build and Push
	steps:
	- name: Checkout repo
	uses: actions/checkout@v3

	- name: Setup Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.9'

	- name: Install python packages
	run: \|
	python -m pip install --upgrade pip
	pip install mkdocs mkdocs-material
	git clone https://monticore:$GITLAB_TOKEN@git.rwth-aachen.de/se/infrastructure/monticore-pygments-highlighting.git
	pip install -r ./monticore-pygments-highlighting/requirements.txt
	pip install ./monticore-pygments-highlighting

	- name: Preprocess the docs
	run: sh docs/scripts/preprocessing.sh

	- name: Build the docs into a site directory
	run: mkdocs build --verbose --clean --strict

	- name: Push
	uses: s0/git-publish-subdir-action@develop
	env:
	REPO: self
	BRANCH: gh-pages # The branch name where you want to push the assets
	FOLDER: site # The directory where your assets are generated
	SQUASH_HISTORY: true
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	MESSAGE: "Deploy contents of GitHub pages to gh-pages branch" # The commit message

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