Merge overleaf-2024-04-09-1144 into main #13

	name: Build LaTeX document & latexdiff to previous tagged version.
	on: [push, pull_request]
	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout new version
	uses: actions/checkout@v2
	with:
	path: new
	fetch-depth: 0
	- name: Set last tag value
	run: \|
	echo ::set-output name=LAST_TAG_NAME::"$(cd new && git describe --tag HEAD^ --abbrev=0)"
	id: tag_val_stp
	- name: Checkout old version
	uses: actions/checkout@v2
	with:
	path: old
	ref: ${{ steps.tag_val_stp.outputs.LAST_TAG_NAME }}
	- name: Compile LaTeX document
	uses: xu-cheng/latex-action@v2
	with:
	root_file: whitepaper.tex
	working_directory: new/
	- name: Install latexdiff
	run: sudo apt-get install latexdiff
	- name: Run latexdiff
	run: latexdiff -t UNDERLINE --verbose --no-links --flatten old/whitepaper.tex new/whitepaper.tex > new/diff.tex
	- name: Compile LaTeX difference document
	uses: xu-cheng/latex-action@v2
	with:
	root_file: diff.tex
	working_directory: new/
	- name: Check pdf files
	run: \|
	file new/diff.pdf \| grep -q ' PDF '
	- name: Upload
	uses: actions/upload-artifact@v2
	with:
	name: paper
	path: \|
	new/diff.pdf
	new/whitepaper.pdf
	steps:
	- name: Release
	uses: fnkr/github-action-ghr@v1
	if: startsWith(github.ref, 'refs/tags/')
	env:
	GHR_PATH: new/whitepaper.pdf
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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