【Git 變基篇】git rebase 與 merge 底層拆解：為什麼變基會產生全新 SHA？Commit 移植機制與無痛衝突解決 / [Git Rebase vs Merge Internals] Why Rebase Generates New SHAs: Commit Replay Mechanism and Conflict Resolution
在團隊協同開發時，許多工程師都曾遇過這樣的困惑：明明只是把功能分支對齊最新主幹，執行了 git rebase main 之後，原本好端端的提交雜湊碼（Commit SHA）居然全數換成了一組完全陌生的新代碼；要是有人不小心在共用分支上執行變基並強制推送，全團隊的 git pull 更會瞬間陷入雙倍歷史與衝突地獄。 During team collaboration, many developers stumble upon this puzzle: simply wanting to align a feature branch with the latest main via git rebase main unexpectedly rewrites every single commit SHA into completely unfamiliar hashes; if someone accidentally rebases a shared branch and force-pushes, teammates' subsequent pulls instantly turn into a nightmare of duplicated history and merge conflicts. 承接我們在上一篇探討的 Git 底層物件模型與指標移動，今天我們將視野推進到分支整合的核心戰場。究竟 git rebase 在底層做了什麼？它與傳統的 git merge 拓撲有何根本不同？為什麼變基一定會產生新雜湊？搞懂這些機制，你就能徹底擺脫對變基的恐懼，自信寫出乾淨俐落的線性版本歷史。 Building on our previous exploration of Git object stores and pointer movements, today we advance to the central arena of branch integration. What does git rebase actually execute under the hood? How does its direct acyclic graph differ fundamentally from traditional git mer...
