Open Source Collaboration with Git and GitHub

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Open Source Collaboration with Git and GitHub Nick Quaranto

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whoami • 4th Year Software Engineering Major • From Buffalo – Snow is awesome – Go Bills • Rubyist • GitHub Blogger

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Version control sucks.

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But it doesn’t have to.

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History

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I'm an egoistical bastard, and I name all my projects after myself. First Linux, now git. -Linus Torvalds

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History • BitKeeper debacle • Design Goals: – CVS as an example of what not to do – Distributed workﬂow – Strong safeguards against corruption – Very high performance • In development since 2005

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Fast 1. Fast

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Directed Acyclic Graph

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Small 2. Small

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Git Internals: Blobs 457aef93ff7ffbb289f7e1384f900679eacf044a main.c

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Git Internals: Trees

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Git Internals: Commits

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Git Internals: Commits

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Local 3. Local

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The Staging Area

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CHEAP. 4. Cheap Branching

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Git Internals: Branches branchname HEAD

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Branching

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Distributed 5. Distributed

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Git Internals: Remotes branchname HEAD remotes/server/name

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Local vs. Remote

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Any Workﬂow 6. Multiple Workﬂows

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Centralized

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Integration Manager

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Benevolent Dictator

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Failboat. It’s not perfect.

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The downsides • Complexity • Windows FTL • What's an IDE? • Unreadable source • Needs some maintenance

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How to Contribute 1. Fork a repository at GitHub 2. Clone and connect your local repository 3. Write tests, implement functionality 4. Commit your local changes 5. Push your changes to your fork 6. Make a pull request 7. Proﬁt!!

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Demo

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git log • Kudos to Scott Chacon who made – http://git-scm.com – http://whygitisbetterthanx.com • And to Michael Hartl – for Building the Insoshi Social Network • Wikipedia too. nick@quaran.to http://litanyagainstfear.com