How to return git

In the software development process, Git is an essential tool. The undo operation in Git is one of the core operations, which can help us conveniently when we commit code by mistake or need to roll back to a specific version. So, in this article, we will mainly discuss how to effectively undo operations in Git and how to roll back to the previous version of the code.

First, let’s introduce the undo operation in Git.

Undo operations

Git provides the following undo operations:

1. Undo uncommitted modifications

If you made modifications in the local workspace Some files have not been submitted. In this case, you can use the following command to undo:

git checkout -- <filename>

Among them, <filename> refers to the name of the file that needs to be undone. Through this command, Git will replace the modifications in your workspace with the files in the local warehouse, restoring the files to the state when you last submitted them.

2. Undo the submitted changes

If you have submitted the changes to the local warehouse, but you find that your changes are wrong, you can use the following command to undo:

git reset HEAD~1

This command will undo the current submission and extract the changes to the workspace, allowing you to re-modify and submit again.

3. Roll back to the specified version

If you want to roll back to a previous version, you can use the following command:

git reset <commit>

Among them, &lt ;commit> represents the commit number of a version you want to roll back to. This command will roll back to the specified version and discard all subsequent commits.

In addition to the above three undo operations, Git also provides other undo operations, such as modifying the description information of a commit, etc. Related information about these operations can be obtained from Git's help documentation.

Next, we will introduce how to roll back to a previous version of the code.

Rollback operation

In Git, the operation of rolling back to a certain version of the code can be divided into two steps:

The first step is to find the code that needs to be rolled back to The commit number of the version. You can use the following command to view:

git log

This command will list the submission records contained in the entire Git warehouse, and each record will include its corresponding submission number. After finding which version you need to roll back to, record its corresponding commit number.

In the second step, use the following command to roll back:

git reset --hard <commit>

Among them, <commit> represents the commit number of a certain version you want to roll back to. After using this command, Git will switch the current code base to the specified version and discard all subsequent commits.

It should be noted that this rollback operation is not reversible. Once you roll back to a certain version, all subsequent changes to the code base will be lost.

Conclusion

In actual development, Git's undo and rollback operations are extremely useful. Mastering these operations allows us to develop and manage code more efficiently, ensuring the health and accuracy of the code base. Hope this article can be helpful to you.

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