![]() What’s happening: git checkout alters files in the working directory to a state previously known to Git. You want to undo everything in that file-just go back to the way it looked in the last commit. You haven’t committed those changes, though. Scenario: The cat walked across the keyboard and somehow saved the changes, then crashed the editor. With nothing currently staged, this just rewrites the previous commit message. What’s happening: git commit -amend will update and replace the most recent commit with a new commit that combines any staged changes with the contents of the previous commit. Undo with: git commit -amend or git commit -amend -m "Fixes bug #42" Scenario: You just typo’d the last commit message, you did git commit -m "Fxies bug #42" but before git push you realized that really should say “Fixes bug #42”. This is Git’s safest, most basic “undo” scenario, because it doesn’t alter history-so you can now git push the new “inverse” commit to undo your mistaken commit. If the old commit is “matter”, the new commit is “anti-matter”-anything removed in the old commit will be added in the new commit and anything added in the old commit will be removed in the new commit. What’s happening: git revert will create a new commit that’s the opposite (or inverse) of the given SHA. Scenario: You just ran git push, sending your changes to GitHub, now you realize there’s a problem with one of those commits. In this post, I’m going to take a look at some common scenarios where you might want to “undo” a change you’ve made and the best way to do it using Git. When you make a new commit, Git stores a snapshot of your repository at that specific moment in time later, you can use Git to go back to an earlier version of your project. ![]() In Git, “undo” can mean many slightly different things. This will keep the history the same, and it will not change the record of the branch’s history.One of the most useful features of any version control system is the ability to “undo” your mistakes. You could also make a new commit that signifies exactly the same state of the venture as f414f31.Also, the commits you did after f414f31 will no longer be included in the history of your master branch. Yet, this is rewriting the history of your branch, so if you share your branch with anyone it is best to not use this option. This can be done with git reset –hard f414f31. You could make your current branch to point to the older commit instead.(You can find that via git log or by viewing any history browser.) You then have a few different choices dependent on what you would like to do: Here is another example, presume that the good commit that you want to go back to is f414f31. HEAD shows your current branch, or current commit, meaning that all git reset –hard HEAD will do is to throw away all of the uncommitted changes you have. Then it will make the files in the working tree and the index (“staging area”) the same as the versions committed in.Make your present branch (typically master) back to point at.When you want to revert to a past commit using git reset – – hard, add. ![]() ![]() For example, if you do git add to stage a newer version of the file, this will override the past staged version of the file in the staging area. But be sure to note that Git does not take track of changes to your files. ![]() When you have created a commit, which will have your project files stored in a particular state, they ae safe. Git records the state of the files when you stage them with git add or when you make a commit. Be sure to always double check that the output of git status is empty (clean) before you begin using it. Luckily there is an easy solution to follow to correct this.įirst of all git reset - hard is a very dangerous command because it eliminates all of your noncommitted changes. A question that comes up with developers is how to use git reset– hard HEAD to revert to previous commit. ![]()
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