Autosquash #2877

	name: Autosquash
	on:
	check_run:
	types:
	# Check runs completing successfully can unblock the corresponding pull requests and make them mergeable.
	- completed
	pull_request:
	types:
	# A closed pull request makes the checks on the other pull request on the same base outdated.
	- closed
	# Adding the autosquash label to a pull request can trigger an update or a merge.
	- labeled
	pull_request_review:
	types:
	# Review approvals can unblock the pull request and make it mergeable.
	- submitted
	# Success statuses can unblock the corresponding pull requests and make them mergeable.
	status: {}

	jobs:
	autosquash:
	name: Autosquash
	runs-on: ubuntu-18.04
	steps:
	- uses: tibdex/autosquash@v2
	with:
	# The built-in secrets.GITHUB_TOKEN cannot yet be used because of this limitation:
	# https://git.luolix.topmunity/t5/GitHub-Actions/Triggering-a-new-workflow-from-another-workflow/td-p/31676
	# In the meantime, use a token granting write access on the repo:
	# - a GitHub App token
	# See https://github.com/marketplace/actions/github-app-token.
	# - a personal access token
	# See https://help.github.com/en/articles/creating-a-personal-access-token-for-the-command-line.
	github_token: ${{ secrets.AUTOSQUASH_TOKEN }}

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