Visualizing what’s happening on our project

Mark Needham

Why?

Curious to see the trend with lines of

code

Do the same people pair with

each other?

How big are our commits?

How many people work on an average

story?

Do people work in the same area of

the code?

Breakable Toys

“Budget for failure by designing and building toy systems that are similar to the systems you build at work in toolset but not in scope.”

Demo of the graphs

The evolution of the code

Humble Shell Scripts

Hacked together web app

The humble shell script

Jetty Web Server

Text files

JSON

node.js server

JSON

step

mongodb

expressexpresso

jade

underscore

npm

nodemon

Getting git commits

Parsing git commits

Alex/Charles #0 Added functional ML test

Mark/Pat: some other shizzleLiz/Marc: important stuff

Mark/Liz: a very long, and weird message

[“Alex”, “Charles”]

[ “Mark”, “Liz”]

[ “Mark”, “Pat”]

[ “Liz”, “Marc”]

Parsing git commits

Unit Testing!

Parsing git commits

Parsing git commits

#fail

Parsing git commits

Alex/Charles #0 Added functional ML test

Mark/Pat: some other shizzleLiz/Marc: important stuff

Mark/Liz: a very long, and weird message

{ “Alex” : 1, “Charles” : 1, “Mark” : 2, “Added” : 1, “some” : 1, “important” : 1 }

Parsing git commits

Parsing git commits

Parsing git commits

Uday/Liz: Did some stuff with mark logic

?

Parsing git commits

Uday/Liz: Did some stuff with mark logic

{ “Mark” : 1, “Uday” : 1, “Liz” : 1, “did” : 1 }

Parsing git commits

Uday/Liz: Did some stuff with mark logic

{ “Mark” : 1, “Uday” : 1, “Liz” : 1, “did” : 1 }#fail

Calculating lines of code

Abusing node

Abusing node

$ curl http://localhost:3000/git/updatecurl: (52) Empty reply from server

Faking HTTP responses

git log -l30000 --no-merges --ignore-all-space --shortstat --ignore-all-space --pretty="format:%cd%n%s" --find-copies

Parsing git extended history

git log -l30000 --no-merges --ignore-all-space --shortstat --ignore-all-space --pretty="format:%cd%n%s" --find-copies

Parsing git extended history

Parsing git extended history

Parsing git extended history

Protovis

RGraph

Graphing libraries

Protovis

RGraph

Graphing libraries

High Charts

High Charts

Protovis

Protovis

The Pair Stair

What did we learn from these graphs?

Who rotates pairs

regularly

Whether people are avoiding

working on XQuery

Who started off working on a

particular feature

When the build

breaks most

frequently

When/What the big code changes were

Gaming the system

The End

Mark Needham@markhneedham