B 2594 add prefill label #4655

	name: Detect environment variables changes

	on:
	pull_request:
	types: [opened, synchronize]
	branches:
	- main

	jobs:
	detect_and_comment:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Comment on pull request if changes detected
	uses: actions/[email protected]
	with:
	script: \|
	const specificFilePatterns = [
	/(?:\+\+\+ b\/\|--- a\/)(.*\.env\.example)/g,
	/(?:\+\+\+ b\/\|--- a\/)(.*docker-compose.yml)/g,
	/(?:\+\+\+ b\/\|--- a\/)(.*Procfile)/g,
	/(?:\+\+\+ b\/\|--- a\/)(.*app\.yaml)/g,
	];

	const { data: diff } = await github.rest.pulls.get({
	owner: context.repo.owner,
	repo: context.repo.repo,
	pull_number: context.payload.pull_request.number,
	mediaType: {
	format: "diff",
	},
	});

	const filesChanged = [
	...new Set(specificFilePatterns.map(pattern => [...diff.matchAll(pattern)].map(arr => arr.at(1))).flat()),
	];

	if (filesChanged.length > 0) {
	const comment = `The following files have changed. It may have impacted environment variables:
	${filesChanged.map(file => ` * \`${file}\``).join("\n")}

	Confirm that you have:

	- [ ] updated environment variables in staging
	- [ ] updated environment variables in production
	- [ ] done any required change in Heroku (new dynos, new apps, etc.)`;

	await github.rest.issues.createComment({
	owner: context.repo.owner,
	repo: context.repo.repo,
	issue_number: context.payload.pull_request.number,
	body: comment
	})
	}

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