Git Revert File Git and GitHub: How to Revert a Single File.

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Introduction

Once you start collaborating with other developer it's going to be important to know how to revert a single file to a certain commit. This need arises because you sometimes need to change files not related to you're pull request in order to test the feature you're working on. However, manually changing each line of code in those files back to their original state and doing a new commit can lead to a messy commit history. Reverting the file is a much cleaner what to handling it.

Find the Commit ID

First you need to go to the shared repository on GitHub and find the file that you want to revert. Once you navigate to the file, right above the file you should see this:

On the right hand side you can see a 7 digit commit ID and a date. That is the commit ID for the most recent commit in which that file was modified. Either write this commit ID down, or copy it to your clipboard.

Find the File Path

The next thing you need is the path to the file from the working directory. This part is easy because the path to the file is on the same GitHub screen where you found the commit ID for the file.

Above you can see the same screenshot from before, but this time I've underlined the file path. Notice I only underlined part of the path. The first directory listed is the working directory name, and will be the directory you're in when using this file path. Because of this, you only want the underlined portion.

Revert the file.

All that is left is to revert the file. Once you've opened a terminal and changed to the working directory, you use git checkout to revert the file. The format of the git command will look like this:

git checkout [commit ID] -- path/to/file

If I were going to revert the file in the screenshots above, that would look like this:

Commit the Change

I know what you're thinking, "Wait a minute, I thought the whole point was to not create a new commit?" Well that's half true. We didn't want a new commit for the file we reverted. But once we revert the file, we need to commit that change. In this case, the change is a revert of a single file. This done with the standard commit command:

git commit -m 'commit message'

Then you can push that commit to the remote so that the version of your branch on GitHub matches your local version.

Takeaways

To revert a single file to a specific version do the following:

• Find the commit ID of the version of the file you want to revert to.
• Find the path to the file you want to revert from the working directory.
• In the terminal, change directories to the working directory.
• Type git checkout [commit ID] -- path/to/file and hit enter.
• Commit the change to the reverted file.

References

Cover Image
How can I reset or revert a file to a specific revision? - Stackoverflow

Comments

[Gerry Tan]

In most cases you want to checkout to the commit before the most recent ones. So the command should be:

git checkout [commit ID]~1 -- path/to/file

~1 here is reference to the commit's first parent, more info.

[Connor Leech]

You can also leave the commit hash out, to for instance go back to the most recent commit (the HEAD):

git checkout -- path/to/your/file

[Chris Cook]

git show some_commit_sha1 -- some_file.c | git apply -R

stackoverflow.com/a/7196615/1967693

[Fernando Guillen]

yes!

[Peter Henry]

I'm trying this, and all is great...until the last step of trying to push. I get this error,
fatal: You are not currently on a branch (but I am, I can clearly see I'm on the branch that has the commit hash as stated above)
To push the history leading to the current (detached HEAD)
state now, use
git push origin HEAD:

and when I do that....
! [rejected] HEAD -> name of my branch <non-fast-forward)
error: failed to push some reds to 'bitbucket.org/company/more paths'

The red errors with fail and rejected is not confidence inspiring. What am I doing wrong?

[radley112]

Takeaways: @geometry dash
Find the commit ID of the version of the file you want to revert to.
Find the path to the file you want to revert from the working directory.
In the terminal, change directories to the working directory.
Type git checkout [commit ID] -- path/to/file and hit enter.
Commit the change to the reverted file.
(this is the first result i found)

[Javier Trujillo (Misterdigital)]

This article is a lifesaver for anyone who's ever needed to revert a single file in a Git repository! The step-by-step guide is clear and easy to follow, making it accessible even for those who are relatively new to Git. The explanation of the git checkout command and how it can be used to restore a specific file to a previous state is particularly valuable. It's also great to see the inclusion of practical examples and the mention of potential pitfalls, such as ensuring you don't accidentally overwrite changes. Thanks for sharing this useful tip!

[Japan Shah]

Thanks @lofiandcode for the nice article - I directly jumped to Takeaways section and it worked.

[Fernando Guillen]

It doesn't work if the file is deleted:

error: pathspec 'my/file/path' did not match any file(s) known to git

[pradeepkatiyar007]

So, while the guide focuses on a specific task, the underlying techniques offer a powerful way to explore and navigate the history of your code, like a developer's own time machine!

Wonderful for OST vs PST!

[Nathan wells]

In the world of version control, mistakes happen. Fortunately, Git offers several ways to revert changes, including reverting a single file. This article will guide you through two methods to revert a single file in Git and GitHub:

1. Using Git Checkout:

This approach allows you to revert to a specific commit for a single file.

Steps:

1. Find the commit ID of the version you want to revert to.

• Use git log to view the commit history of the file.

• Navigate to your local repository.

• Run the command: git checkout [commit ID] --

• Replace [commit ID] with the actual commit ID you found.

• Stage the changes: git add

• Commit the changes: git commit -m "Revert changes to "

• Push your changes to GitHub: git push origin HEAD

2. Using Git Reset:

This method allows you to discard changes made to a single file and revert it to the state in the working directory or the index.

Steps:

• Navigate to your local repository.

• Run the command: git reset HEAD
  This resets the file to the state in the HEAD commit.

• Alternatively, to revert to the state in the index: git reset HEAD^

• Stage the changes: git add

• Commit the changes: git commit -m "Revert changes to "

• Push your changes to GitHub: git push origin HEAD

Remember:

• Always back up your repository before making any significant changes.

• Consider using a commit message that clearly describes the revert action.

• These methods only revert changes locally. You need to push your changes to GitHub to reflect them on the remote repository.

Additional Resources:

Git documentation on checkout: git-scm.com/docs/git-checkout
Git documentation on reset: git-scm.com/docs/git-reset
GitHub Help article on reverting commits: docs.github.com/en/desktop/managin...
By understanding these methods, you can easily revert changes to a single file in Git and GitHub, ensuring your code base remains clean and reflects your desired state as shoviv.