Repo Sync #9
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| name: Repo Sync | |
| # **What it does**: GitHub Docs has two repositories: github/docs (public) and github/docs-internal (private). | |
| # This GitHub Actions workflow keeps the `main` branch of those two repos in sync. | |
| # **Why we have it**: To keep the open-source repository up-to-date | |
| # while still having an internal repository for sensitive work. | |
| # **Who does it impact**: Open-source. | |
| # For more details, see https://github.com/repo-sync/repo-sync#how-it-works | |
| on: | |
| workflow_dispatch: | |
| schedule: | |
| - cron: '20 */3 * * *' # Run every 3rd hour at 20 minutes after | |
| permissions: | |
| contents: write | |
| pull-requests: write | |
| jobs: | |
| repo-sync: | |
| if: github.repository == 'github/docs-internal' || github.repository == 'github/docs' | |
| name: Repo Sync | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Check out repo | |
| uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1 | |
| - name: Sync repo to branch | |
| uses: repo-sync/github-sync@3832fe8e2be32372e1b3970bbae8e7079edeec88 | |
| with: | |
| source_repo: https://${{ secrets.DOCS_BOT_PAT_WORKFLOW }}@github.com/github/${{ github.repository == 'github/docs-internal' && 'docs' || 'docs-internal' }}.git | |
| source_branch: main | |
| destination_branch: repo-sync | |
| github_token: ${{ secrets.DOCS_BOT_PAT_WORKFLOW }} | |
| - name: Ship pull request | |
| uses: actions/github-script@e69ef5462fd455e02edcaf4dd7708eda96b9eda0 | |
| with: | |
| github-token: ${{ secrets.DOCS_BOT_PAT_WORKFLOW }} | |
| result-encoding: string | |
| script: | | |
| const { owner, repo } = context.repo | |
| const head = 'github:repo-sync' | |
| const base = 'main' | |
| async function closePullRequest(prNumber) { | |
| console.log('Closing pull request', prNumber) | |
| await github.rest.pulls.update({ | |
| owner, | |
| repo, | |
| pull_number: prNumber, | |
| state: 'closed' | |
| }) | |
| // Error loud here, so no try/catch | |
| console.log('Closed pull request', prNumber) | |
| } | |
| console.log('Closing any existing pull requests') | |
| const { data: existingPulls } = await github.rest.pulls.list({ owner, repo, head, base }) | |
| if (existingPulls.length) { | |
| console.log('Found existing pull requests', existingPulls.map(pull => pull.number)) | |
| for (const pull of existingPulls) { | |
| await closePullRequest(pull.number) | |
| } | |
| console.log('Closed existing pull requests') | |
| } | |
| try { | |
| const { data } = await github.rest.repos.compareCommits({ | |
| owner, | |
| repo, | |
| head, | |
| base, | |
| }) | |
| const { files } = data | |
| console.log(`File changes between ${head} and ${base}:`, files) | |
| if (!files.length) { | |
| console.log('No files changed, bailing') | |
| return | |
| } | |
| } catch (err) { | |
| console.error(`Unable to compute the files difference between ${head} and ${base}`, err.message) | |
| } | |
| console.log('Creating a new pull request') | |
| const body = ` | |
| This is an automated pull request to sync changes between the public and private repos. | |
| Our bot will merge this pull request automatically. | |
| To preserve continuity across repos, _do not squash_ this pull request. | |
| ` | |
| let pull, pull_number | |
| try { | |
| const response = await github.rest.pulls.create({ | |
| owner, | |
| repo, | |
| head, | |
| base, | |
| title: 'Repo sync', | |
| body, | |
| }) | |
| pull = response.data | |
| pull_number = pull.number | |
| console.log('Created pull request successfully', pull.html_url) | |
| } catch (err) { | |
| // Don't error/alert if there's no commits to sync | |
| // Don't throw if > 100 pulls with same head_sha issue | |
| if (err.message?.includes('No commits') || err.message?.includes('same head_sha')) { | |
| console.log(err.message) | |
| return | |
| } | |
| throw err | |
| } | |
| console.log('Locking conversations to prevent spam') | |
| try { | |
| await github.rest.issues.lock({ | |
| ...context.repo, | |
| issue_number: pull_number, | |
| lock_reason: 'spam' | |
| }) | |
| console.log('Locked the pull request to prevent spam') | |
| } catch (error) { | |
| console.error('Failed to lock the pull request.', error) | |
| // Don't fail the workflow | |
| } | |
| console.log('Counting files changed') | |
| const { data: prFiles } = await github.rest.pulls.listFiles({ owner, repo, pull_number }) | |
| if (prFiles.length) { | |
| console.log(prFiles.length, 'files have changed') | |
| } else { | |
| console.log('No files changed, closing') | |
| await closePullRequest(pull_number) | |
| return | |
| } | |
| console.log('Checking for merge conflicts') | |
| if (pull.mergeable_state === 'dirty') { | |
| console.log('Pull request has a conflict', pull.html_url) | |
| await closePullRequest(pull_number) | |
| throw new Error('Pull request has a conflict, please resolve manually') | |
| } | |
| console.log('No detected merge conflicts') | |
| console.log('Merging the pull request') | |
| // Admin merge pull request to avoid squash | |
| await github.rest.pulls.merge({ | |
| owner, | |
| repo, | |
| pull_number, | |
| merge_method: 'merge', | |
| }) | |
| // Error loud here, so no try/catch | |
| console.log('Merged the pull request successfully') | |
| - uses: ./.github/actions/slack-alert | |
| if: ${{ failure() && github.event_name != 'workflow_dispatch' }} | |
| with: | |
| slack_channel_id: ${{ secrets.DOCS_ALERTS_SLACK_CHANNEL_ID }} | |
| slack_token: ${{ secrets.SLACK_DOCS_BOT_TOKEN }} |