How to check commit modifications in git? Command sharing

Git is one of the most commonly used version control systems and an essential tool for developers. In Git, each modification is stored as a commit. In this article, we will learn how to view commit changes in Git.

First, let us understand the basic concepts of Git:

• Repository: Git repository, which is your project folder.
• Commit: The modification record in Git includes the modified author, description, timestamp and other information.
• Branch: Branch in Git, mainly used for separation and management of code during the development process.
• Merge: The process of merging changes from one branch into another branch.

Next, we will introduce several Git commands to view commit modifications:

1. git log

Commandgit log You can list all commit records in the warehouse, including the modification author, description, timestamp and other information of each commit. You can use the following command to view commit records:

$ git log

This command lists all commit records, starting with the most recent record. You can also use some parameters to limit the amount of information displayed or filter commit records. For example:

$ git log -n 5

This command will only display the latest 5 commit records.

2. git show

Command git show can display the detailed information of the specified commit, including the specific content of the modification. You can use the following command to display the information of a certain commit:

$ git show <commit-id></commit-id>

Among them, <commit-id></commit-id> is the ID number of the commit you want to view. The ID number can be found in the output of the git log command.

3. git diff

Command git diff is used to compare the differences between two commits. You can use the following command to compare the differences between two commits:

$ git diff <commit1> <commit2></commit2></commit1>

Among them, <commit1></commit1> and <commit2></commit2> are the two to be compared The ID number of a commit. This command will output the difference between the two commits.

4. git bisect

Command git bisect is used to quickly locate a specific commit in a large commit history. You can use the following command to run git bisect:

$ git bisect start

This command will start a new binary search (binary search algorithm). You need to tell Git whether the commit currently being checked is a "bad" commit or a "good" commit, just like in binary search. For example:

$ git bisect bad
$ git bisect good <commit-id></commit-id>

where <commit-id></commit-id> is the ID number of the commit that you think is a "good" one. Git automatically picks the midpoint of the current commit history and moves you to that point. Then, you need to manually test the code to determine whether this commit is "good" or "bad". After each test, use the following command to tell Git:

$ git bisect bad

or:

$ git bisect good

Git will continue the binary search based on your feedback until the exact commit is finally found.

The above are several commonly used Git commands for viewing commit modifications. I hope this article can help you better use Git to manage code versions.

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