Computer Science
Grade 8
20 min
Introduction to Git
Introduction to Git
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1
Introduction & Learning Objectives
Learning Objectives
Define 'version control' and explain its importance in software development.
Describe the purpose of a repository, a commit, and a branch.
Explain the difference between a local and a remote repository.
Differentiate between the tool 'Git' and the service 'GitHub'.
Outline the basic workflow for making and saving changes using version control concepts.
Identify the benefits of using branches for developing new features.
Ever accidentally deleted a huge part of your school project or a level you built in a game and wished you had a time machine? ⏳
In this lesson, you'll learn about a powerful tool called Git that acts like a time machine for your code. It helps you track every change, fix mistakes easily, and work on pr...
2
Key Concepts & Vocabulary
TermDefinitionExample
Version Control System (VCS)A tool that tracks and manages changes to files over time. It lets you recall specific versions later, see who made what changes, and collaborate with others.Think of it like the 'Version History' in Google Docs, but much more powerful and designed for code files.
Repository (Repo)A special folder that contains all your project's files and the entire history of changes made to those files.If you have a folder on your computer called `MyAwesomeGame`, you can turn it into a Git repository to start tracking all your code, images, and sound files.
CommitA snapshot of your repository at a specific point in time. Each commit has a unique ID and a message describing the changes you made.After you finish coding the player's jum...
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Core Syntax & Patterns
The Basic Git Workflow
1. Modify Files -> 2. Stage Changes -> 3. Commit Changes
This is the fundamental cycle for saving your work. First, you change your code. Then, you choose which changes you want to include in your next snapshot (staging). Finally, you save that snapshot permanently with a descriptive message (committing).
The Safe Feature Development Pattern
1. Create a New Branch -> 2. Develop and Commit on the Branch -> 3. Merge Branch into Main
To avoid breaking your main project, always create a new branch when you start working on a new feature or bug fix. Do all your work there. Once it's finished and tested, you can safely merge it back into the main branch.
4 more steps in this tutorial
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Challenging
A project's history on GitHub shows the following: 1. A branch `new-header` was created from `main`. 2. A commit 'Add responsive header' was made on `new-header`. 3. The `new-header` branch was merged into `main`. How does this structured history help a new developer joining the team?
A.It proves that the new developer is not qualified for the team
B.It shows a single, confusing change to the `main` branch without any context
C.It clearly isolates the header-related changes, making it easy to understand what was added and why
D.It automatically deletes the code for the header to save space
Challenging
You are working on a critical bug fix. You make a commit on your local machine with the perfect solution. Before you can 'push' to GitHub, your laptop's hard drive fails completely. What is the status of your bug fix on the remote GitHub repository?
A.The fix is safe on GitHub because you made a commit
B.The fix is lost because it only existed on your local machine and was never sent to the remote server
C.GitHub will automatically recover the commit from your broken laptop
D.The fix is partially saved on GitHub, but is marked as incomplete
Challenging
Two developers, Priya and Leo, are working on a website. They both start from the same `main` branch. Priya creates a branch `add-animation` and Leo creates a branch `fix-contact-form`. What is the primary advantage of them working on separate branches?
A.It forces them to work at different times of the day to avoid problems
B.It prevents their individual changes from interfering with each other while they are in progress
C.It makes the final website load faster for users
D.It automatically merges their code together without any conflicts
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