A little information about Git

Presented on KievAltNet, UA Dev Club 2011

In this talk I describe some intial information and internal of the most popular DVCS system - Git.

Transcript

1. A little information on Git
   Alexander Beletsky, E-conomic
   @alexbeletsky
   http://beletsky.net
   

   View Slide

2. What is Git?
   Git is a distributed source code management
   system
   (c) K.O.
   

   View Slide

3. The birth of Git
   ● It's all began in Linux Kernel community
   ● Tarballs and gzip used for long time to
   contribute patch
   ● BitKeeper as first SCM for Linux Kernel
   project
   ● Friendship is over in 2005
   ● Development of Kernel stopped till SCM is
   found
   ● No good enought alternatives found
   ● 2 weeks to create initial version of Git
   

   View Slide

4. Does Git mean something?
   “I’m an egotistical bastard, and I name all my
   projects after myself. First Linux, now git.”
   Linus Torvalds
   

   View Slide

5. Distributed
   ● No central repository
   ● Each developer host repository on machine
   ● Allows to work offline
   

   View Slide

6. Content
   ● Content Tracking != File Tracking
   ● Name, path etc. is not part of content
   ● SHA1 algorithm used create content digest
   ● Separate "Index" and "Data"
   ● Store the version, not difference
   ● History is computed rather stored
   

   View Slide

7. Management
   ● Blobs, Trees, Commits, Tags
   ● Indexes
   

   View Slide

8. Branches and merges
   ● De-centralized but centralized
   ● Developers are welcome to do branches
   ● Pulling requests to each other
   ● Pushing changes to origin
   ● Merge is easy now
   

   View Slide

9. Development model with Git
   ● No permissions to commit
   ● Branches, branches, branches
   ● Network of Trust instead of Corporate Policy
   ● Leaders have release branches
   

   View Slide

10. What about SVN?
    ● SVN is not dead
    ● SVN still suite a lot of companies
    ● Git for Crowd - SVN for Corporate
    

    View Slide

11. Github Git-as-Service
    ● http://github.com
    ● Git as SCM, RoR web interface
    ● Huge community
    ● Git sources hosted on Github
    

    View Slide

12. THANK YOU!
    Questions?
    

    View Slide