add new function to validate a digraph #31

	---
	name: Deploy Jekyll with GitHub Pages dependencies preinstalled

	on: # yamllint disable-line rule:truthy
	# Runs on pushes targeting the default branch
	push:
	branches: ["main"]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
	permissions:
	contents: read
	pages: write
	id-token: write

	# Allow one concurrent deployment
	concurrency:
	group: "pages"
	cancel-in-progress: true

	jobs:
	# Build job
	build:
	runs-on: ubuntu-latest
	container:
	image: erlang:26-slim
	volumes:
	- /gh_pages:/gh_pages
	- /_site:/_site

	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Setup Pages
	uses: actions/configure-pages@v2
	- name: Build with Jekyll
	uses: actions/jekyll-build-pages@v1
	with:
	source: ./gh_pages
	destination: ./_site

	- name: generate the public edoc
	run: rebar3 edoc
	- name: copy the doc files
	run: cp -r ./doc ./_site/edoc

	- name: generate the full edoc
	run: rebar3 as dev edoc
	- name: copy the doc files
	run: cp -r ./doc ./_site/edoc_dev

	- name: generate the ex_doc
	run: rebar3 ex_doc --output exdoc
	- name: copy the doc files
	run: cp -r ./exdoc ./_site/exdoc

	- name: Upload artifact
	uses: actions/upload-pages-artifact@v1

	# Deployment job
	deploy:
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	needs: build
	steps:
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v1

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