Let's talk about how to use git to cancel modifications

When using git for version control, sometimes we modify files by mistake or do not want to commit certain files, but do not want to delete them. At this time, we can use the git unmodify command to undo these modifications. This article will introduce how to use git to cancel modifications.

1. Use git checkout to cancel modifications

The git checkout command can be used to switch branches or restore files. When we use the git checkout filename command to restore a file, it rolls the file back to its most recent commit state. That is, all modifications to the file will be undone.

For example, we have modified the file a.txt. If we want to undo this modification, we can use the following command:

$ git checkout a.txt

After executing the above command, git will roll back the a.txt file The status as of the latest commit.

2. Use git reset to cancel the submission

Sometimes we accidentally add some files that do not need to be submitted to the submission, or submit some wrong files. At this time, we can use the git reset command to cancel these commits.

Assume that our latest submission is commit1, we need to revoke the submission, use the following command:

$ git reset HEAD^

In the above command, HEAD^ means going back to the previous submission, which is before commit1 One commit. After executing this command, we can continue to modify our code and resubmit.

It should be noted that the git reset command needs to be used with caution, because it will delete historical commits. If the commit cannot be restored accidentally, it may cause serious code loss.

3. Use git revert to cancel the submission

In addition, we can also use the git revert command to cancel the submission. The git revert command creates a new commit that reverses the contents of the commit we specified.

For example, if we need to revoke commit1, we can use the following command:

$ git revert commit1

After executing the above command, git will create a new submission named "Revert commit1", which will delete commit1. All modifications. It should be noted that the git revert command will not delete historical commits, so it is safer and more reliable.

Summary

Undoing modifications is one of the commonly used operations in git, which can effectively avoid submitting errors or unnecessary files. This article introduces three commonly used git unmodification solutions: git checkout, git reset and git revert. We can choose the corresponding method to undo the modification operation according to the actual situation.

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