Introduction to Git Version Control System

1. Practical Introduction to Version Control Systems, Git, and GitHub

2. Goals 1. Understand what are VCS and why we need them 2. Learn to use Git understand the basic workflow: add, commit, push 3. Explore the main functionality of GutHub: repositories, issues, pull requests, etc.

3. Search Term Popularity (according to Google Trends) 0 25 50 75 100 Git GitHub Mercurial SVN March 2020April 2005

4. Starting from today, you will be required to use Git for all your assignments and projects You will be submitting them as GitHub repositories. 🙀 😱

5. Chapter 1. The Intuition Behind Version Control Systems (VCS)

6. Version 1Version 1 int factorial(int n) { int prod = 1; for (int k = 2; k <= n; ++k) { prod *= k; } return prod; }

7. Version 1Version 2 Version 1 int factorial(int n) { if (n == 0) return 1; return n * factorial(n - 1); }

8. Version 1Version 3 Version 2 Version 1 int factorial(int n) { return (n == 0) ? 1 : n * factorial(n - 1); }

9. Version 1 Version 3 Version 2 Version 1 int factorial(int n) { if (n == 0) return 1; return n * factorial(n - 1); }

10. Working Together on a Same Project

11. Version 3 Version 2 Version 1 Remote ServerOleks’ Computer Steven’s Computer

12. Version 3 Version 2 Version 1 Remote ServerOleks’ Computer Steven’s Computer Version 3 Version 2 Version 1 push

13. Version 3 Version 2 Version 1 Version 3 Version 2 Version 1 Version 3 Version 2 Version 1 Remote ServerOleks’ Computer Steven’s Computer pull

14. Version 3 Version 2 Version 1 Version 4 Version 3 Version 2 Version 3 Version 2 Version 1 Remote ServerOleks’ Computer Steven’s Computer Version 1

15. Version 3 Version 2 Version 1 Version 4 Version 3 Version 2 Version 4 Version 3 Version 2 Remote ServerOleks’ Computer Steven’s Computer Version 1Version 1 push

16. Version 4 Version 3 Version 2 Version 4 Version 3 Version 2 Version 4 Version 3 Version 2 Remote ServerOleks’ Computer Steven’s Computer Version 1Version 1 pull Version 1

17. Chapter 2. A Closer Look at Git Workflow

18. Initializing an Empty Git Repository and Connecting it to the Remote Repository

19. Oleks’ Computer Working Directory

20. Oleks’ Computer Working Directory Staging Area Local Repository git init Initializing a local Git repository

21. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository git remote add origin git@github.com:olekscode/GitPractice.git Registering a remote repository and assigning it a name “origin”

22. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository git remote add origin git@github.com:olekscode/GitPractice.git Registering a remote repository and assigning it a name “origin” Name URL

23. Making Changes and Pushing them to the Remote Repository

24. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository

25. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository Changing files inside a working directory

26. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository add Adding changes to the staging area (staging changes) git add main.c queue.h queue.c Files that were modified

27. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository commit Committing staged changes to the local repository git commit -m “Implemented the factorial function” Commit message that describes the changes “m” stands for “message"

28. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository push Pushing changes to the remote repository git push origin Name of the remote repository

29. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository add commit push git add main.c queue.h queue.c git commit -m “Implemented the factorial function” git push origin

30. Pulling Changes From the Remote Repository

31. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository Remote repository contains some changes that we don’t have

32. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository Fetching changes Into the local repository fetch git fetch origin Name of the remote repository

33. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository merge Integrating the fetched changes into the working directory git merge FETCH_HEAD Temporary reference to what has just been fetched

34. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository pull git pull origin Name of the remote repository You can fetch changes and then merge them using a single command “git pull”

35. Cloning the Existing Repository

36. Remote ServerOleks’ Computer Remote Repository Repository already exists on a remote server but you don’t have it on your computer

37. Remote ServerOleks’ Computer Working Directory Staging Area Local Repository Remote Repository clone git clone git@github.com:olekscode/GitPractice.git SSH or HTTPS link to the remote repository Cloning the existing repository onto your computer

Introduction to Git Version Control System

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