View Undo History

Introduction

Git is a powerful version control system that allows developers to track changes to their codebase. However, sometimes we make mistakes and need to undo changes that we've made. Git provides several ways to undo changes, but it can be difficult to keep track of all the actions we've taken.

Skills Graph

View "Undo" History

As a developer, you may need to undo changes that you've made to your codebase. Git provides several ways to undo changes, such as using the git reset or git revert commands. However, it can be difficult to keep track of all the actions you've taken, especially if you've used more advanced commands like git rebase.

Tasks

Let's say you've made some changes to a repository and want to undo them.

1. Navigate to the repository.
2. Now, you realize that you made a mistake and want to undo the last commit.
3. You may realize that you've made another mistake and want to undo the reset. View the reference log and find the commit hash of the previous commit.
4. You can see that the previous commit hash is d22f46b and use this hash to reset the repository back to the previous commit.
5. View historical commit records to verify results.

Here is the result of step 3. This will display a list of all the actions you've taken in the repository, including the reset:

cf80005 (HEAD -> master) HEAD@{0}: reset: moving to HEAD~1
d22f46b (origin/master, origin/feature-branch, origin/HEAD) HEAD@{1}: clone: from https://github.com/labex-labs/git-playground.git

Summary

In this challenge, you learned how to view the "undo" history in Git using the git reflog command. The reference log is a record of all the actions you've taken in your repository, including commits, merges, rebases, and resets. By viewing the reference log, you can see a complete history of all the changes you've made to your repository, even if they don't show up in the commit history. This can be especially useful when you need to undo changes that you've made to your codebase.