The Guts of Git

The Guts of Git

Nov 20, 2012

Git is a version control system. We can look at it from that high level. Git is a content tracking system. Some teachers advise us to look at it from that lowered elevation. But I will take you to the very bottom. The floor. The code. The algorithms. The directed acyclic graph of hashed bit sequences made efficient through LZW compression and deferred garbage collection determined by node reachability via hash relationships.

“But why?”, you may ask. “Why go this deep?” Git is a tool that works so well for so many. It mystically corrects anticipated merge conflicts. It’s “where did code come from” results from blame are impressive. The ability to re-write history through rebase is awesome. The globally unique identifier nature of a hash-produced ref is revolutionary.

Uber-geeks are magic-slayers. We want and need to know precisely how things work. Like a hard 50 push-up workout, this study will make working with Git at the daily developer level a fraction of the effort — like a mere ten push-ups. Let’s dig into the guts of Git.

About the Speaker

Matthew McCullough

Matthew is an energetic 15 year veteran of enterprise software development and world-traveling open source educator. Matthew guides the Training efforts at GitHub.com and is author of the Git Master Class series for O’Reilly, co-author of the O’Reilly’s Version Control with Git book, co-author of the Presentation Patterns book, a speaker on the No Fluff Just Stuff tour, an author of three of the top 10 DZone RefCards, including the Git RefCard, and President of the Denver Open Source Users Group.

Posted in Meetings
AJUG Meetup

Building and Deploying 12 Factor Apps in Scala and Java

June 20, 2017

The twelve-factor app is a modern methodology for building software-as-a-service apps:

• Use declarative formats for setup automation, to minimise time and cost for new developers joining the project.

• Have a clean contract with the underlying operating system, offering maximum portability between execution environments.

• Are suitable for deployment on modern cloud platforms, obviating the need for servers and systems administration.

• Minimise divergence between development and production, enabling continuous deployment for maximum agility.

• And can scale up without significant changes to tooling, architecture, or development practices.

We will build a RESTful web service in Java and deploy the app to CloudFoundry. We will go over how to build a cloud manifest, how to keep our database credentials and application configuration outside of our code by using user-provided services and go over what it takes to build a 12 Factor application in the cloud. This presentation will be heavy on code and light on slides!

Location:


Roam Dunwoody

1155 Mount Vernon Highway NE
Atlanta, GA 30338 (map)

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