Demystifying the Difference Between ‘git branch’ and ‘git checkout’

As a developer, some of the most common Git operations we perform involve topic branching and switching between different branches. The git branch and git checkout commands are fundamental to these tasks. However, many developers use these commands interchangeably and incorrectly assuming they provide the same functionality.

But git branch and git checkout have distinct purposes despite being closely related. Mastering the key differences will help unlock the true potential of Git branching and make you a more efficient and confident Git user.

In this comprehensive guide, we’ll demystify these commands by exploring:

• Why understanding git branch vs git checkout is critical
• The key differences between the two commands
• When and how to use git branch for branch management
• When and how to use git checkout for switching branches
• Common branching workflows using both commands
• Handy tips and recommendations

So if you have ever been unsure about when to use git branch, git checkout or gotten them mixed up, this guide is for you!

Why Understanding git branch vs git checkout is Important

Topic branching is pivotal to Git‘s utility and popularity as a version control system. The ability to work on independent branches for experiments, new features, bug fixes etc parallelly is what sets Git apart.

git branch and git checkout provide the basic tools to create, navigate and manage these branches. According to a survey of 1100 developers conducted by DigitalOcean, git branch and git checkout are amongst the most frequently used Git commands.

Despite their ubiquity, many developers struggle to distinguish when to use git branch vs git checkout leading to suboptimal workflows. Mastering these two commands is essential to leverage Git branching effectively.

Understanding their differences also provides better insight into how Git structurally treats branches. This can influence how you organize branches for your projects.

With the basics covered, let‘s deep dive into the key differences between git branch and git checkout.

The Fundamental Differences Between git branch and git checkout

Though git branch and git checkout are commonly used for branching operations, they are distinct commands with the following core differences:

1. Managing Branches vs Switching Branches

The primary function of git branch is to create, list and delete branches. It manages the branches but does not switch between them.

git checkout is used to switch between branches. It updates the files in the working directory and the HEAD pointer to reflect the branch you checkout.

2. Modifying the Branch Structure vs Working Directory

git branch modifies the branch structure of your repository by creating or deleting branch references. It does not alter the content of files in your working directory.

git checkout updates your working directory by switching branches or discarding changes. But it cannot make changes to the branch structure itself.

3. Local Branches vs Remote Tracking Branches

git branch acts only on local branches by default. The -r flag is needed to view remote tracking branches.

git checkout can switch between local and remote branches interchangeably using origin/<branch_name> for remote branches.

4. granularity of Operations

git branch works at branch level granularity – all operations apply to entire named branches.

git checkout allows file level granularity with the -- <file> syntax to discard changes in specific files.

These conceptual differences translate into distinct practical usage scenarios for git branch and git checkout as we‘ll explore next.

How to Use git branch for Branch Management

The primary functionality of git branch is to create, delete and list branches. Let‘s look at some common scenarios:

Creating New Branches

To create a new branch while continuing to work on the current branch:

git branch new-feature

This creates a new branch pointer new-feature without switching to it.

Branch names should be meaningful like feature/payment-module or bugfix/login-issue based on project conventions.

Listing Available Branches

To see all locally available branches, use:

git branch

The branch checked out in the current working directory will be highlighted with an *.

You can also list branches sorted by last modified date using:

git for-each-ref --sort=-committerdate --format=‘%(refname:short)‘ refs/heads/

Deleting Branches

Once a feature branch has been merged, it‘s best practice to delete it using:

git branch -d branch_to_delete

The -d flag deletes the branch only if it has already been merged with upstream.

To force delete an unmerged branch:

git branch -D unmerged_branch

Renaming Existing Branches

To rename a branch while pointed to any other branch:

git branch -m old_branch_name new_branch_name

This changes the branch name old_branch_name to new_branch_name

Tracking Branches Across Remotes

By default git branch tracks only local branches. To view remote branches use:

git branch -r 

To see mapping between local and remote branches:

git branch -vv

This maps the remote origin/feature/payment branch with its local tracking branch feature/payment.

Key Takeaways

• Use git branch for all branch management operations – create, delete, rename, list branches
• Operates only on local branches by default
• Does not modify working directory or switch branches

Now that we have seen how to manage branches with git branch, let‘s explore how git checkout enables moving between these branches.

How to Use git checkout for Switching Branches

While git branch allows modifying the branch structure itself, git checkout enables switching between these branches created by git branch.

Switching to Existing Branches

To switch to an existing branch:

git checkout branch_name 

This updates the files in the working directory and the HEAD reference to the commit pointed by branch_name:

You can quickly switch between recent branches using:

git checkout -

This toggles between the last two checked out branches.

Creating and Switching to New Branches

git checkout can create and switch to new branches using the -b flag:

git checkout -b new_feature

This is equivalent to:

git branch new_feature
git checkout new_feature

-b avoids needing to switch context after git branch.

Switching to Remote Branches

To check out a remote branch referenced as origin/feature/payment:

git checkout origin/feature/payment

This sets up a local tracking branch feature/payment linked to the remote.

Discarding Uncommitted Changes

To discard all uncommitted changes in the working directory:

git checkout .

To reset a specific file foo.txt to the latest commit version:

git checkout -- foo.txt

This is useful to revert edits made to tracked files.

Detached HEAD State

Checking out a commit instead of a branch will result in a detached HEAD state where you are not on any branch.

Use this to inspect old snapshots as it prevents you from accidentally writing changes.

Key Takeways

• Use git checkout to switch between branches
• Create new branches with -b flag
• Restore files in working directory
• Detached HEAD allows safe commit inspection

Now that we have covered the core usage patterns of both git branch and git checkout, let‘s see how we can apply them in branching workflows.

Applying git branch and git checkout Together In Practice

In reality, we often use git branch and git checkout together to implement essential workflows like creating and merging feature branches.

Let‘s take a look at some common scenarios.

Starting a New Feature Branch

To start work on a new feature payment-module based on main:

git checkout -b payment-module main

This creates a new branch payment-module branched off of main and switches to it.

Merging Feature Branches

Once work is complete in payment-module, it can be merged into main:

git checkout main
git merge payment-module

Don‘t forget to clean up old branches with git branch -d payment-module

Comparing Branches

To compare payment-module against main, use:

git diff main...payment-module

This shows the diff between the tips of both branches.

Rebasing Feature Branches

To rebase payment-module on top of latest main:

git checkout payment-module
git rebase main

This brings in latest changes from main and replays commits in payment-module.

Tracking Remote Branches

To push payment-module to a remote repository:

git push -u origin payment-module 

This pushes the branch and sets up remote tracking.

Key Takeaways

• Combine git checkout and git branch to create, merge, compare feature branches
• Rebase local branches on top of latest remote branches
• Push up branches to share changes in remotes

Understanding these branching workflows will help you become proficient in leveraging git branch and git checkout for your projects.

Helpful Tips for Mastering git branch and git checkout

Here are some additional tips to help you avoid common pitfalls and use branch switching more efficiently:

• Use branch naming conventions like feature/payment or bugfix/login-issue based on project guidelines
• List branches regularly with git branch to stay updated on available branches
• Commit all changes before switching branches to prevent data loss
• Use git stash to temporarily stash uncommitted changes if needed while switching branches
• Prefer git checkout -b over git branch + git checkout to directly create and switch to new branches
• Understand how detached HEAD state works when checking out arbitrary commits
• Leverage branch comparison using git diff branchA..branchB before merging branches
• Delete old merged branches with -d to keep branch list clean

Key Takeaways and Recommendations

We‘ve covered a lot of ground differentiating git branch vs git checkout. Let‘s recap the key lessons:

• Use git branch for managing branches – create, delete, list, rename branches
• Use git checkout for switching between branches – update working directory and HEAD
• git branch only modifies the branch structure, not working directory
• git checkout modifies working directory, not branch structure
• Combine git checkout and git branch for workflows like feature branches
• Understand how detached HEAD works when checking out arbitrary commits

Here are some final recommendations on when to use each command:

• Need to create, delete, rename branch? Use git branch
• Need to switch branches? Use git checkout
• Creating a new branch and want to immediately switch to it? Use git checkout -b
• Want to discard uncommitted changes? Use git checkout -- <file>
• Don‘t be afraid to experiment! Both commands are critical to mastering Git workflows.

Understanding the precise differences between git branch and git checkout takes time. Refer back to this guide whenever you need a quick refresher.

Hopefully this provides a comprehensive overview of how to leverage git branch and git checkout like a pro! Let me know in the comments if you have any other helpful tips or common workflows using these commands.