How to use Git to view commit changes

Git is a distributed version control system that can record all changes in project code to facilitate collaborative development by multiple people. In Git, committing modifications is a very important operation because it can record code changes at a stage and can be traced and compared.

Now, let’s learn how to use Git to view submitted changes.

1. View submission history

The method to use Git to view submission history is very simple. Just use the following command:

git log

This command will list all the project Submission history, which includes the author of each submission, the time of submission, submission information, etc. If the project has many commits, use the up and down arrows to scroll through them.

If you want to view a specific commit record, you can use the following command:

git show <commit-id></commit-id>

where <commit-id></commit-id> refers to the commit you want to view The ID of the record, which can be the full SHA-1 value or an abbreviation.

2. View modifications

Using Git to view the submission history can list all submission records, but if we want to view the specific modifications made to a certain submission, we can use the following command:

git diff <commit-id-1> <commit-id-2></commit-id-2></commit-id-1>

This command will list the differences between the two commits, including which files were added, deleted, which lines of code were modified, etc.

If we only want to view the modifications of a specific file, we can add the file name after the command, as shown below:

git diff <commit-id-1> <commit-id-2> <file></file></commit-id-2></commit-id-1>

Where, <file></file> Refers to the file name to be viewed.

3. Reference Submission

Sometimes we may need to view the modifications before or after a certain submission. In this case, you can use the following command:

git diff <commit-id>^ <commit-id></commit-id></commit-id>

This command will Lists the differences before and after the specified commit (excluding the current commit).

4. View file history

Sometimes we want to view the historical modification record of a file, we can use the following command:

git log <file></file>

This command will list the specified file All submission records, including the author of each submission, submission time and submission information, etc.

If we want to view the changes made to a specific commit, we can use the following command:

git show <commit-id> <file></file></commit-id>

Where, <commit-id></commit-id> refers to the The ID of the submitted record to be viewed, which can be the complete SHA-1 value or an abbreviation.

5. Summary

The above are the methods of Git to view submitted modifications. Through these methods, we can easily view the historical modification records of the project code. As an excellent version control system, Git can not only record code changes, but also facilitate developers' collaborative development and improve development efficiency.

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