Post PR API diff #14

	name: Post PR API diff

	on:
	workflow_run:
	workflows: [PR API diff]
	types: [completed]

	permissions:
	actions: read
	issues: write
	pull-requests: write

	jobs:
	post-comment:
	if: github.event.workflow_run.conclusion == 'success'
	runs-on: windows-latest

	steps:
	- name: Download API diff
	uses: actions/download-artifact@v4
	with:
	name: api-diff
	run-id: ${{ github.event.workflow_run.id }}
	github-token: ${{ secrets.GITHUB_TOKEN }}

	- name: Create or update PR comment
	uses: actions/github-script@v7
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}
	script: \|
	const fs = require('fs');
	const marker = '<!-- dotnet-omd-api-diff -->';
	const diff = fs.readFileSync('api-diff.md', 'utf8').trim();
	const issue_number = Number(fs.readFileSync('pr-number.txt', 'utf8').trim());
	const { owner, repo } = context.repo;

	const comments = await github.paginate(github.rest.issues.listComments, {
	owner,
	repo,
	issue_number,
	per_page: 100
	});

	const existing = comments.find(comment =>
	comment.user.type === 'Bot' && comment.body.includes(marker));

	const body = diff
	? [
	marker,
	'## API changes',
	'',
	diff
	].join('\n')
	: [
	marker,
	'## API changes',
	'',
	'No API changes are currently detected in this pull request.'
	].join('\n');

	if (existing) {
	await github.rest.issues.updateComment({
	owner,
	repo,
	comment_id: existing.id,
	body
	});
	} else {
	await github.rest.issues.createComment({
	owner,
	repo,
	issue_number,
	body
	});
	}

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