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Update single PR comment across preview deploy + teardown

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The deploy job was creating a fresh comment on every push, so PRs
accumulated a wall of preview-URL comments. Now we look up the existing
comment by an HTML marker (`<!-- cd-staging:preview -->`) and edit it
in place — both on push and on teardown. Comment also gains a link to
the GitHub Actions run that produced the preview, plus the head SHA.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Ullrich Schäfer 2026-05-04 07:17:57 +02:00
parent fbe9882455
commit bdf9270f88
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1 changed files with 26 additions and 4 deletions
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30
.github/workflows/cd-staging.yml vendored
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@ -312,18 +312,34 @@ jobs:
docker compose -f docker-compose.staging.yml -p "$PROJECT" --env-file staging.env ps
- name: Comment preview URL on PR
uses: peter-evans/create-or-update-comment@v4
# Find any prior preview comment so we can update it in place rather
# than spamming a new one each push. The marker line at the bottom of
# the body is what `body-includes` matches on.
- name: Find existing preview comment
uses: peter-evans/find-comment@v3
id: find-comment
with:
issue-number: ${{ github.event.number }}
comment-author: "github-actions[bot]"
body-includes: "<!-- cd-staging:preview -->"
- name: Upsert preview comment on PR
uses: peter-evans/create-or-update-comment@v4
with:
comment-id: ${{ steps.find-comment.outputs.comment-id }}
issue-number: ${{ github.event.number }}
edit-mode: replace
body: |
🚀 **PR preview deployed**
- **Journal:** https://${{ steps.ports.outputs.host }}
- **Planner (shared staging):** https://planner.staging.trails.cool
- **Database:** `${{ steps.ports.outputs.database }}` (separate from production / persistent staging)
- **Build:** [run ${{ github.run_id }}](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}) · commit `${{ github.event.pull_request.head.sha }}`
Updates automatically on push. Tears down when this PR closes.
<!-- cd-staging:preview -->
# ── PR preview teardown ──────────────────────────────────────────────
teardown-preview:
@ -397,7 +413,7 @@ jobs:
with:
issue-number: ${{ github.event.number }}
comment-author: "github-actions[bot]"
body-includes: "PR preview deployed"
body-includes: "<!-- cd-staging:preview -->"
- name: Update preview comment on close
if: steps.find-comment.outputs.comment-id
@ -406,4 +422,10 @@ jobs:
comment-id: ${{ steps.find-comment.outputs.comment-id }}
edit-mode: replace
body: |
🧹 PR preview torn down (PR ${{ github.event.action == 'closed' && github.event.pull_request.merged && 'merged' || 'closed' }}).
🧹 **PR preview torn down** (PR ${{ github.event.pull_request.merged && 'merged' || 'closed' }}).
Database `trails_pr_${{ steps.ports.outputs.pr }}` dropped, containers removed, Caddyfile snippet cleared.
[Teardown run ${{ github.run_id }}](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
<!-- cd-staging:preview -->