Revert a Commit

我們先造一個不想要的 commit。 來在我們的 README.md 底下新增一行 "Not desirable change"：

$ echo "Not desirable change" >> README.md && git add README.md && git commit -m "Not desirable change"

來看一下 log:

$ git log --oneline
af8e253 (HEAD -> main) Not desirable change
d05e621 Merge branch 'doc/features'
d2e483f Add: Installation section
1cb8880 (doc/features) Add: Features section
98ad8b1 Add: Introduction section
436b67d First Commit

我們先來 revert 一下。我們今天想要消除掉 af8e253 的編輯對吧？那我們來針對他 revert:

$ git revert af8e253

這時會彈出終端機編輯器，一樣退出就好。會出現：

$ git revert af8e253
[main 634fee5] Revert "Not desirable change"
 1 file changed, 1 deletion(-)

這時我們看 log:

$ git log --oneline
634fee5 (HEAD -> main) Revert "Not desirable change"
af8e253 Not desirable change
d05e621 Merge branch 'doc/features'
d2e483f Add: Installation section
1cb8880 (doc/features) Add: Features section
98ad8b1 Add: Introduction section
436b67d First Commit

多出了一個有關 revert 的 commit。

此時我們檢查 README.md:

# DBMS TA Session Git Example
## Introduction
## Installation
## Features

"Not desirable change" 確實不見了！