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Discover how to effectively list `git` branches that haven't been merged into specific branches using simple commands and techniques to streamline your workflow.
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How to List git Branches Not Merged into Given Branches

When working on collaborative projects, managing git branches can become a challenging task. You might find yourself in a situation where you need to identify branches that have not been merged into certain key branches like master, prod, or dev. Knowing how to efficiently accomplish this can save you time and help maintain an organized codebase.

In this guide, we'll explore how to list git branches that are not merged into specific branches, providing you with a step-by-step guide and useful tips.

Understanding the Problem

In a typical git workflow, branches often diverge and contain changes that may or may not be merged into a central branch. This divergence can make it difficult to track which feature branches or bug fixes are fully integrated into your primary branches.

The Query

You want to find branches that are not merged into multiple specified branches. For instance, you may want to check for any branches that remain unmerged in origin/master, origin/prod, or origin/dev. The basic command that many users consider is:

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

However, what you need is a more refined approach that lists all branches that are not merged into any of these branches.

Solution: Listing Unmerged Branches

Here are the methods to achieve your goal, whether you need this solution one-time or frequently.

One-Time Command Solution

If you only need to perform this operation once, you can use the following command, which combines the results from multiple branches and filters them effectively:

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

Breakdown of the Command:

git branch --no-merged branch1: This command lists all branches that are not merged into branch1.

git branch --no-merged branch2: This lists unmerged branches for branch2.

The awk command filters the output to ensure you only get branches that appear in both lists.

Important Note: If you use multiple branches, make sure to adjust the 2 in the awk command according to the number of branches you are checking. For example, if you check three branches, this should be changed to 3.

Automating with a Shell Loop

If you frequently need to check the status of unmerged branches, consider creating a shell loop to automate the process. Here's an example setup to make it easier for repetitive use:

Example of a Shell Loop:

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

How to Use the Script:

Save this script as check_unmerged.sh.

Make it executable with chmod + x check_unmerged.sh.

Run it with the branch names you want to check, like so:

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

This will give you a list of branches that are not merged into any of the branches you specified, saved with a simple and reusable command.

Conclusion

Identifying unmerged branches in git is crucial for keeping your codebase clean and organized. Whether you're executing a simple command for a one-time inquiry or setting up a shell loop for repetitive checks, these techniques will enhance your workflow.

Feel free to customize the scripts based on your project's needs. Happy coding!