git hub learn

1. Version Control with Git
http://flic.kr/p/6oP7x7

2. Version Control
Why track/manage different versions of code?

3. Version Control
Why track/manage different versions of code?
• Backup: Undo or refer to old stuff
• Branch: Maintain old release while working on new
• Collaborate: Work in parallel with teammates

4. Version Control Systems (VCSs)
• Help you track/manage/distribute revisions
• Standard in modern development
• Examples:
– Revision Control System (RCS)
– Concurrent Versions System (CVS)
– Subversion (SVN)
– Git
Our focus
older
newer

5. Version Control Hosting Services
• Enable sharing version control repos
• Internet/Web based
• Examples:
– SourceForge
– Bitbucket
– GitLab
– GitHub
Our focus

6. GitHub-User Perspective
You GitHub

7. GitHub-User Perspective
Working Dir
You GitHub

8. GitHub-User Perspective
Working Dir
Local
Repos
You GitHub

9. GitHub-User Perspective
Working Dir
Local
Repos
Remote
Repos
You GitHub

10. Remote
Repos
GitHub
Working Dir Local
Repos
Working Dir Local
Repos
Working Dir
Local
Repos
Working Dir
Local
Repos
Using GitHub
to Collaborate

11. You GitHub
Working Dir
Questions to answer
Local
Repos
Remote
Repos
How organized?
What operations?

12. Repo Organization
http://git-scm.com/book/

13. Repo Organization
Commits (from oldest
to newest; hashes as
commit IDs)
http://git-scm.com/book/

14. Repo Organization
Snapshot of all files
at each commit
http://git-scm.com/book/

15. Repo Organization
Branch (last commit)
http://git-scm.com/book/

16. Local repos also have...
http://git-scm.com/book/
HEAD
Current Version
in Working Dir

17. You
Working Dir
Local Repo Operations
Local
Repos
• init
• add/commit
• log
• switch/checkout
• branch
• merge
• …

18. How commit
works...
http://git-scm.com/book/
Before
HEAD

19. How commit
works...
http://git-scm.com/book/
After
HEAD

20. Remote Repo Operations
Local
Repos
Remote
Repos
You GitHub
• clone
• push
• pull
• fetch
• remote
• ...

21. Learn the Core Local/Remote Operations
• Demo Videos:
– https://scott-fleming.github.io/web-dev-rails-git-
tutorial/demo-04-git-local.html
– https://scott-fleming.github.io/web-dev-rails-git-
tutorial/demo-05-git-branches.html
– https://scott-fleming.github.io/web-dev-rails-git-
tutorial/demo-06-git-remote.html

22. Summary
• Version Control Systems
• Git and GitHub
• Repo Structure
• Local/Remote Repo Operations
• Commit Semantics
http://flic.kr/p/aCLor3