Module 12 Capstone Part 3: Release and Emergency Fixes

Congratulations! Your code has been merged and is ready for the world. In the final practical part of our capstone, we handle the "Production Lifecycle."

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Phase 6: The Official Release

1. The Version: Your team decides your app is ready for "Version 1.0."
2. Tagging: Create an annotated tag on your main branch:

   git tag -a v1.0.0 -m "Initial stable production release"
   

3. Verification: Run git show v1.0.0 to see your metadata and the state of the code at that milestone.

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Phase 7: The Emergency (The Reflog Test)

It’s 4 AM. You are tired. You meant to add a tiny fix, but you accidentally ran:

git reset --hard HEAD~10

DISASTER: You've just deleted the last 10 commits, your merge history, and your tags are pointing to the wrong place.

1. Panic Check: Run git log. Observe that your history is gone.
2. The Rescue: Run git reflog.
3. Identify: Find the SHA-1 ID of where your main branch was before you ran the reset (look for the line just above the "reset: moving to HEAD~10" line).
4. The Jump:

   git reset --hard <SAFE-SHA-1>
   

5. The Miracle: Run git log again. Notice that every single commit is back exactly where it belongs.

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Phase 8: Archive and Cleanup

1. Final Sync: Ensure your submodule is also clean and up-to-date.
2. Grep Check: Run git grep "TODO" to ensure you didn't leave any development notes in your production code.
3. The Alias: Use your lg (log graph) alias to take one final look at your beautiful, linear, professional history.

graph TD
    Stable["Stable v1.0.0"] --> Mistake["Accidental Hard Reset"]
    Mistake --> Void["Empty History"]
    Void -- "Identify in Reflog" --> Recover["git reset --hard [SAFE ID]"]
    Recover --> Stable

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Capstone Progress Check

By the end of Part 3, you should have:

• Officially versioned a software product.
• Recovered from the most feared disaster in Git.
• Performed final production quality checks.

Status: Project delivered. You have survived the Capstone.

Next Lesson: Course Conclusion and Certification. We’ll wrap up the journey and look at the path ahead for your engineering career.