Coding together allows you to work as a team so you can build bigger projects faster.
In this studio, we will practice the common Git commands used when multiple people work on the same code base.
You and a partner will begin by coding in tag-team shifts. By the end of the task, you should have a good idea about how to have two people work on the same code at the same time. You will learn how to:
This lesson reinforces:
The instructor will discuss why GitHub is worth learning. You already know how to use a local Git repository with one branch, giving you the ability to move your code forward and backward in time. Working with branches on GitHub extends this ability by allowing multiple people to build different features at the same time, then combine their work. Pull requests act as checkpoints when code flows from branch to branch. We are going to simulate a radio conversation between the shuttle pilot and mission control.
Students must pair off for this exercise. If you have trouble finding a partner, ask your TA for help.
You and your partner will alternate tasks, so designate one of you as Pilot and the other as Control. Even when it is not your turn to complete a task, read and observe what your partner is doing to complete theirs. The steps here mimic how a real-world collaborative Git workflow can be used within a project.
Be careful if you try to use
copy/paste with the
git commands! The
$ symbols in the screenshots represent the prompts in the terminal.
They are NOT part of the commands.
Control: Navigate to your development folder and enter the following 3 commands to create a new project.
$ mkdir communication-log $ cd communication-log $ git init
Now that you have a directory, open Visual Studio and create a new console project.
Setting Up a
.gitignore file is a text file that will contain untracked files or ignored files.
These are files that will become part of your repo but are not very useful to other developers.
Placing them in a
.gitignore file will tell git to skip over them, which will reduce visual clutter in your terminal.
Mac Users this is part of your initial configuration.
Windows Users: There are a few steps to create a
Select the Git tab. Scroll down to Settings.
Settings will open the Source Control option. Under Sorce Control select Git Repository Settings then General in the right-side pane, look for the Git files section. Select Add for Ignore file: Select OK to add your new files.
Again, this is only one way to create this type of file. Use it as a starting point, and grow from here.
commityour new console app. You can use your stand-alone terminal or use the terminal built-in to your IDE. In Visual Studio, the terminal is found in the View menu.
Great! We’ve got our project going locally, but we’re going to need to make it
accessible for Pilot also. Let’s
push this project up to GitHub.
Go to Control’s GitHub profile and find the communication-log repo.
Click on the green Code button. Clone the HTTPS (not SSH) url. Copy the url to your clipboard.
In your terminal, navigate to your development folder and clone down the repo.
The command should look something like this.
$ git clone https://github.com/chrisbay/communication-log.git
Now you can respond to Control!
communication-log.sln file in your editor and add your response to mission control. Be creative, the communication can go anywhere! Just don’t ask your partner what you should write.
When you open the project folder, you might not be in the same directory as the solution.
You want to open the solution or
A quick way to do that from the terminal is to
cd into the folder that is holding the solution
and then type
open .sln on a Mac and
start .sln in Windows.
After you finish,
commit your change.
Now we need to
push up your changes so Control can use them as well.
$ git push origin main ERROR: Permission to chrisbay/communication-log.git denied to Pilot. fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.
Great error message! It let us know exactly what went wrong: Pilot does not have security permissions to write to Control’s repo. Let’s fix that.
In your web browser, go to your
Click the Settings button
Click the Collaborators button
Click the green Add people button to invite collaborators.
Enter in Pilot’s GitHub username.
When you see Pilot’s profile, select it and then click Select a collaborator above.
You should now see a “Manage access” pane on GitHub. Pilot’s username should be visible along with their collaboration status. At this point, you should see “Pending invite”.
Check your email. You should receive an email invitation to join this repository.
View and accept the invitation.
This should take you to Control’s repo.
If you don’t see an email (it may take a few minutes to arrive in your inbox), check your Spam folder. If you still don’t have an email, visit the repository page for the repo that Control created (ask them for the link), and you’ll see a notification at the top of the page.
Now let’s go enter that command again to
push up our code.
$ git push origin main Counting objects: 9, done. Delta compression using up to 4 threads. Compressing objects: 100% (9/9), done. Writing objects: 100% (9/9), 1.01 KiB | 0 bytes/s, done. Total 9 (delta 8), reused 0 (delta 0) remote: Resolving deltas: 100% (8/8), completed with 8 local objects. To [email protected]:chrisbay/communication-log.git 511239a..679de77 main -> main
Anyone reading the code through GitHub’s browser interface should now see the new second line.