Python Commit Amending & Interactive Rebase (git rebase -i)
Before pushing code for review, developers clean up local commits. git commit --amend combines staged edits into the most recent commit or updates its message. git rebase -i allows squashing, rewording, dropping, reordering, and editing historical commits.
"Interactive rebase is like an author doing a final copy-editing pass on a novel manuscript: merging two small paragraphs into one (squash), fixing a spelling mistake (reword), or deleting an unnecessary paragraph (drop)."
Deep Dive: How It Works
git commit --amend: Replaces the tip commit with a new commit containing current staged changes.
Rebase Commands: pick (keep), reword (edit message), squash (melt into previous commit), fixup (squash & discard message), drop (delete).
Linear History: Rebase replays commits on top of another base branch, eliminating merge bubbles.
Syntax Blueprint
git commit --amend -m "feat: corrected message" git rebase -i HEAD~3 # Replay and squash commits interactively
Amend latest commit in place or launch interactive rebase editor over the last 3 commits.
Core Rules to Remember
Common Beginner Traps & How to Fix Them
Rebasing shared main or master branches.Why it happens: Generates new SHA hashes for existing commits, forcing teammates into divergent merge conflicts.
How to fix: Only rebase private local feature branches before merging.
Live Interactive Example
Hit Run Code to see it liveYour Turn: Micro Challenge
No pressure! Edit the starter code below and test your solution with instant feedback.
Amend Latest Commit Message
- Amend the latest commit message to "feat(core): initialize kernel runtime" using "git commit --amend -m".
- Display the updated log with "git log --oneline".
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