comment preview deployment url on PR

[piyush-jaiswal]

Summary by CodeRabbit

• Chores
  • Pull requests now receive an automatic comment containing the Vercel preview URL after preview deployment.
  • The deployment workflow captures the preview URL from the preview build and exposes it for subsequent steps.
  • A new workflow step posts the captured preview URL as a persistent PR comment for easy access and review.
  • Applies to preview builds triggered via GitHub Actions on pull requests.

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📥 Commits

Reviewing files that changed from the base of the PR and between bf50dc8 and c7202f9.

📒 Files selected for processing (1)

• .github/workflows/deploy_preview.yml (2 hunks)

Walkthrough

Captures the Vercel preview URL from the deploy step (written to GITHUB_OUTPUT as preview-url) and adds a workflow step that posts that URL as a sticky comment on the pull request using thollander/actions-comment-pull-request@v3.

Changes

Cohort / File(s)	Summary
GitHub Actions Workflow \.github/workflows/deploy_preview.yml	Deploy step modified to emit the Vercel preview URL to GITHUB_OUTPUT (shared output preview-url). Added a new step that reads preview-url and posts it as a PR comment using thollander/actions-comment-pull-request@v3. Existing deploy behavior retained.

Sequence Diagram(s)

sequenceDiagram
    autonumber
    actor Dev as Developer
    participant GA as GitHub Actions
    participant Deploy as Deploy Step (vercel CLI)
    participant Vercel as Vercel
    participant Out as GITHUB_OUTPUT (preview-url)
    participant Comment as PR Comment Action
    participant PR as GitHub PR

    Dev->>GA: Open/update PR
    GA->>Deploy: Run vercel deploy
    Deploy->>Vercel: Request deploy
    Vercel-->>Deploy: Return preview URL
    Deploy->>Out: Write preview-url to GITHUB_OUTPUT
    GA->>Comment: Run comment action
    Comment->>Out: Read preview-url
    Comment->>PR: Post sticky PR comment with preview URL

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Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Archive build before deploy #14 — Also modifies the deploy step in .github/workflows/deploy_preview.yml (related changes to deploy outputs/flags).
• Block vercel deployment on test success #6 — Adds the initial deploy-preview workflow that this PR extends to expose and comment the preview URL.

Poem

A rabbit hops through YAML lines, so spry,
I fetch the preview URL and pin it high.
With whiskers twitching, I leave a note,
"Preview ready!" — on the PR I wrote. 🥕✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title succinctly describes the main purpose of the changeset, which is to post the preview deployment URL as a comment on the pull request, and it directly reflects the core functionality added without extraneous details.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 8dc3ebb and 6b7b48f.

📒 Files selected for processing (1)

• .github/workflows/deploy_preview.yml (1 hunks)

[github-actions]

Preview: https://ecommerce-rest-j8ru0qxq0-piyush-jaiswals-projects.vercel.app

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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 236bde2 and bf50dc8.

📒 Files selected for processing (1)

• .github/workflows/deploy_preview.yml (2 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)

• GitHub Check: deploy-preview