Upstream Sync Check #9
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| name: Upstream Sync Check | |
| on: | |
| schedule: | |
| # Four times a day. The job only opens/updates an issue; it does not merge. | |
| - cron: "0 */6 * * *" | |
| workflow_dispatch: | |
| permissions: | |
| contents: read | |
| issues: write | |
| jobs: | |
| check: | |
| name: Check upstream drift | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Checkout fork | |
| uses: actions/checkout@v6 | |
| with: | |
| fetch-depth: 0 | |
| - name: Fetch upstream | |
| run: | | |
| git remote add upstream https://github.com/pingdotgg/t3code.git || git remote set-url upstream https://github.com/pingdotgg/t3code.git | |
| git fetch --no-tags upstream main | |
| - name: Compute drift | |
| id: drift | |
| run: | | |
| set -euo pipefail | |
| read -r ahead behind < <(git rev-list --left-right --count HEAD...upstream/main) | |
| upstream_sha="$(git rev-parse upstream/main)" | |
| head_sha="$(git rev-parse HEAD)" | |
| echo "ahead=$ahead" >> "$GITHUB_OUTPUT" | |
| echo "behind=$behind" >> "$GITHUB_OUTPUT" | |
| echo "upstream_sha=$upstream_sha" >> "$GITHUB_OUTPUT" | |
| echo "head_sha=$head_sha" >> "$GITHUB_OUTPUT" | |
| git log --oneline --max-count=20 HEAD..upstream/main > /tmp/upstream-commits.txt | |
| - name: Open or update sync issue | |
| if: steps.drift.outputs.behind != '0' | |
| uses: actions/github-script@v8 | |
| with: | |
| script: | | |
| const fs = require("node:fs"); | |
| const owner = context.repo.owner; | |
| const repo = context.repo.repo; | |
| const title = "Sync fork with upstream"; | |
| const ahead = "${{ steps.drift.outputs.ahead }}"; | |
| const behind = "${{ steps.drift.outputs.behind }}"; | |
| const upstreamSha = "${{ steps.drift.outputs.upstream_sha }}"; | |
| const headSha = "${{ steps.drift.outputs.head_sha }}"; | |
| const commits = fs.readFileSync("/tmp/upstream-commits.txt", "utf8").trim(); | |
| const body = [ | |
| `The fork is currently ${ahead} commits ahead of and ${behind} commits behind \`pingdotgg/t3code:main\`.`, | |
| "", | |
| `Fork head: \`${headSha}\``, | |
| `Upstream head: \`${upstreamSha}\``, | |
| "", | |
| "Run the local sync command from a clean checkout:", | |
| "", | |
| "```bash", | |
| "pnpm run sync:upstream", | |
| "```", | |
| "", | |
| "Recent upstream commits:", | |
| "", | |
| commits ? `\`\`\`text\n${commits}\n\`\`\`` : "_No commit list available._", | |
| "", | |
| "This scheduled workflow only reports drift. It does not auto-merge because upstream syncs can conflict with local harness work.", | |
| ].join("\n"); | |
| const { data: issues } = await github.rest.issues.listForRepo({ | |
| owner, | |
| repo, | |
| state: "open", | |
| per_page: 100, | |
| }); | |
| const existing = issues.find((issue) => issue.title === title && !issue.pull_request); | |
| if (existing) { | |
| await github.rest.issues.update({ | |
| owner, | |
| repo, | |
| issue_number: existing.number, | |
| body, | |
| }); | |
| } else { | |
| await github.rest.issues.create({ | |
| owner, | |
| repo, | |
| title, | |
| body, | |
| }); | |
| } |