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Branch Management

Now that you’ve created, merged, and deleted some branches, let’s look at some branch-management tools that will come in handy when you begin using branches all the time.

The git branch command does more than just create and delete branches. If you run it with no arguments, you get a simple listing of your current branches:

$ git branch
  iss53
* master
  testing

Notice the * character that prefixes the master branch: it indicates the branch that you currently have checked out. This means that if you commit at this point, the master branch will be moved forward with your new work. To see the last commit on each branch, you can run git branch -v:

$ git branch -v
  iss53   93b412c fix javascript issue
* master  7a98805 Merge branch 'iss53'
  testing 782fd34 add scott to the author list in the readmes

Another useful option to figure out what state your branches are in is to filter this list to branches that you have or have not yet merged into the branch you’re currently on. There are useful --merged and --no-merged options available in Git for this purpose. To see which branches are already merged into the branch you’re on, you can run git branch --merged:

$ git branch --merged
  iss53
* master

Because you already merged in iss53 earlier, you see it in your list. Branches on this list without the * in front of them are generally fine to delete with git branch -d; you’ve already incorporated their work into another branch, so you’re not going to lose anything.

To see all the branches that contain work you haven’t yet merged in, you can run git branch --no-merged:

$ git branch --no-merged
  testing

This shows your other branch. Because it contains work that isn’t merged in yet, trying to delete it with git branch -d will fail:

$ git branch -d testing
error: The branch 'testing' is not fully merged.
If you are sure you want to delete it, run 'git branch -D testing'.

If you really do want to delete the branch and lose that work, you can force it with -D, as the helpful message points out.