Mixed softening and new law #26

	name: Doc Preview Cleanup

	on:
	pull_request:
	types: [closed]

	jobs:
	doc-preview-cleanup:
	# Do not run on forks to avoid authorization errors
	# Source: https://github.community/t/have-github-action-only-run-on-master-repo-and-not-on-forks/140840/18
	# Note: This does not always work as intended - but you can just ignore
	# the failed CI runs after merging a PR
	if: github.repository_owner == 'JuliaGeodynamics'
	runs-on: ubuntu-latest
	steps:
	- name: Checkout gh-pages branch
	uses: actions/checkout@v4
	with:
	ref: gh-pages

	- name: Delete preview and history
	shell: bash
	run: \|
	git config user.name "Documenter.jl"
	git config user.email "documenter@juliadocs.github.io"
	git rm -rf --ignore-unmatch "previews/PR$PRNUM"
	git commit -m "delete preview" --allow-empty
	git branch gh-pages-new $(echo "delete history" \| git commit-tree HEAD^{tree})
	env:
	PRNUM: ${{ github.event.number }}

	- name: Push changes
	run: \|
	git push --force origin gh-pages-new:gh-pages

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