How to undo after gitcommit

How to undo the commit after gitcommit: 1. Use git revert to undo the commit; 2. Use git reset to undo the commit.

Git is a version control tool that helps developers track and manage code changes. It allows developers to commit and undo changes in the code base. When we use git When committing code with the commit command, we may sometimes find ourselves needing to undo previous commits.

Undo git The commit may be due to the discovery of wrong code, the submission of the wrong file, the need to add or modify more content, or other reasons. Whether in a personal project or a multi-person collaboration project, undo git Commit is a common operation.

There are two main ways to undo a git commit: using the git revert and git reset commands. The following will introduce the usage scenarios, operating steps and precautions of these two methods.

Method 1: Use git revert to undo a commit

When we want to undo a commit and create a new commit to undo the previous commit, we can use git revert Order. using git revert does not destroy or change the previous commit history, but instead creates a new commit that contains the undone changes.

The steps are as follows:

1. First, use the git log command to view the recent commit history and find the commit id of the commit to be revoked.

2. Enter git revert on the command line and replace it with the commit id of the commit you want to revoke. This will create a new commit containing the undo of the previous commit.

3. Enter the reason for revoking this submission in the pop-up editor, then save and close the file.

4. Commit and push changes: Use the git commit command to commit and add the undo changes, and then use the git push command to push the changes to the remote warehouse.

Notes:

- Using git revert to undo a commit adds a new undo commit to the commit history, so it can be safely shared with other developers.

- Reversed commits are retained in the commit history, so the changes from the original commit are still visible.

Method 2: Use git reset to undo commit

Use git When the reset command undoes a commit, it destroys or changes the previous commit history and restores the code base to the specified commit state. This means that the changes from the original commit will be permanently deleted.

The steps are as follows:

1. Use the git log command to view the recent commit history and find the commit id of the commit to be revoked.

2. Enter git reset on the command line and replace it with the commit id of the commit to be undone. Choose different reset modes according to different situations:

- Use git reset --soft Moves the HEAD pointer to the specified commit and keeps previously committed changes in an uncommitted state. This means you can modify your previous submission and resubmit.

- Use git reset --mixed Moves the HEAD pointer to the specified commit and uncaches previously committed changes. This means you need to re-add and commit these changes.

- Use git reset --hard to move the HEAD pointer to the specified commit and completely delete previously committed changes. This means you will permanently delete your committed changes.

3. If you want to push changes to the remote repository, be sure to use the --force option to force the push: git push --force.

Note:

- When using git reset to undo a commit, be cautious and make sure you understand the changes that will be removed and that they are no longer needed.

- In multi-person collaboration projects, using git reset to undo commits may lead to conflicts and the risk of code loss. Please be sure to coordinate and back up your changes with other team members.

Summary:

After using git commit, undoing the commit is a common requirement. Depending on the situation, you can choose to use git revert or git reset command to undo the commit. Using git revert will create a new undo commit and will not destroy the previous commit history; while using git reset destroys or changes previous commit history and restores the code base to the specified commit state.

It is important to note that these commands are used correctly and with care to avoid losing important changes or causing problems with the code base.

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