Скачать или смотреть Understanding Why git tree hash Does Not Show Blobs in Your Repository

A detailed exploration of the reasons behind a missing blob hash after a git commit and how to retrieve the correct information using git commands.
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This video is based on the question https://stackoverflow.com/q/63236106/ asked by the user 'shalabh' ( https://stackoverflow.com/u/11340909/ ) and on the answer https://stackoverflow.com/a/63236310/ provided by the user 'eftshift0' ( https://stackoverflow.com/u/2437508/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding Why git tree hash Does Not Show Blobs in Your Repository

When working with Git, it’s not uncommon to run into issues that can cause confusion. A common problem some developers face is when the git tree hash does not display the expected blobs after committing files. If you’ve recently committed a file to your repository and noticed a lack of the blob hash associated with it, you're not alone! In this guide, we will delve deeper into this issue and explore effective solutions to help you get the information you need.

The Problem: Missing Blob Hash After a Commit

You’ve successfully added a file and committed it to your repository, yet when you inspect the commit’s tree hash, you find that the blob hash for your newly added file is missing. This can be concerning, especially if you are trying to confirm that your file is tracked correctly.

Example Scenario

Let's take a closer look at a scenario:

You create and edit a file called second-file.txt.

You add it to staging using git add ..

You then commit the file: git commit -m "Git Commit# 2".

Finally, after pushing the commit to a remote repository, you check the tree of the commit with the command git cat-file -p <commit_id>.

Upon checking, you are unable to find the expected blob for second-file.txt.

The Solution: Accessing the Blob Hash

The key to resolving this issue is recognizing that the blob for your file may be part of a subdirectory within your repository. Here's how you can effectively retrieve the missing blob hash.

Step-by-Step Instructions

To locate the blob hash of second-file.txt, you can follow these steps:

Inspect the Tree: Start by inspecting the tree associated with your commit. If your current commit ID is 3fb459d6a2104..., use the following command:

[[See Video to Reveal this Text or Code Snippet]]

Look for the tree ID that contains your file.

Explore the Subdirectory: Identify the tree ID for the directory that contains your file (for example, if it's in src/main/resources, you will likely find the corresponding tree ID).

To get details about that tree ID:

[[See Video to Reveal this Text or Code Snippet]]

Locate the Blob: Keep exploring the directory structure by checking the resources folder tree ID until you reach the blob for your specific file (second-file.txt).

Alternatively, you can directly extract the blob hash for your file with the following command:

[[See Video to Reveal this Text or Code Snippet]]

Summary

By using the above steps, you will be able to uncover the blob hash for your committed file, even if it doesn’t appear in the initial tree structure you inspect. Git's object model is powerful, but it requires a little exploration sometimes to retrieve the right information about your files.

Conclusion

When you encounter situations where the git tree hash doesn’t show blobs, remember to dig into the directory structure of your commits. By following the outlined commands, you can efficiently locate the blob hash for your files and ensure that your Git repository is functioning as expected.

Feel free to share your thoughts or experiences with Git issues in the comments below!