Rebooting Open Source at Facebook

Rebooting Open Source  at Facebook JAMES PEARCE  @jamespearce

USE SCALE IMPROVE REPLACE RELEASE

#0  Articulate the value that  open source brings your company

Open source is like   the breeze from   an
open window

But…

USE SCALE IMPROVE RELEASE REPLACE

#1  Use your own open source

#2  Decentralize project ownership

What projects did we own? Who was contributing to them?
How healthy were they?

https://api.github.com/orgs/facebook/

Every repo Every commit Every pull request Every issue

[opensource]> select  
name, followers, forks, commits, issues, pull_requests   from github_repos order by created_at limit 10;  +-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+ | name | followers | forks | commits | issues | pull_requests | +-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+ | memcached | 323 | 53 | 209 | 1 | 0 | | three20 | 7429 | 1521 | 1680 | 200 | 0 | | platform | 146 | 31 | 310 | 2 | 0 | | bunny1 | 43 | 15 | 10 | 0 | 0 | | phpembed | 132 | 26 | 31 | 1 | 0 | | codemod | 309 | 49 | 13 | 9 | 3 | | animation | 0 | 0 | 0 | 1 | 0 | | scribe | 2572 | 469 | 117 | 59 | 11 | | firefox-‐toolbar | 93 | 50 | 532 | 10 | 0 | | cassandra | 205 | 27 | 189 | 0 | 0 | +-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+

Every repo Every commit Every pull request Every issue Every
minute

#3  Invest in instrumentation

• commits made per day • commits made per day
by repo • issue average age • issue average age by repo • issue total age • issue total age by repo • issues closed per day • issues closed per day by repo • issues open • issues open by repo • issues opened per day • issues opened per day by repo • pull request average age • pull request average age by repo • pull request total age • pull request total age by repo • pull requests closed per day • pull requests closed per day by repo • pull requests open • pull requests open by repo • pull requests opened per day • pull requests opened per day by repo • total commits • total commits by owner • total commits by repo • total forks • total forks by owner • total forks by repo • total repos • total repos by owner • total repos by tag • total watchers • total watchers by owner • total watchers by repo

Average followers per repo  Average forks per repo Average pull-request
age  Average issue age External commits

#4  Invest in tools

#5  Establish ownership

#6  Gamiﬁcation of good behavior

1. How core to Facebook's business is this technology? 2.
Who will use it? Who is this technology useful to? How valuable is it? 3. What else already exists that is similar to this technology? 4. Is there anything novel in this project? 5. Does it include any third-party code, including any third-party open source? 6. Who will maintain the project, accept contributions, and liaise with the community? 7. Where & how should this project be distributed? 8. What is your expected public release date?

#7  Launch is step zero

kvocontroller 0" 1000" 2000" 3000" 4000" 5000" 6000" 7000" 8000"
0" 10" 20" 30" 40" 50" 60"

0" 1000" 2000" 3000" 4000" 5000" 6000" 7000" 8000" 0"
10" 20" 30" 40" 50" 60" fb-ﬂo origami

0" 1000" 2000" 3000" 4000" 5000" 6000" 7000" 8000" 0"
10" 20" 30" 40" 50" 60" chisel tweaks shimmer kvocontroller

0" 1000" 2000" 3000" 4000" 5000" 6000" 7000" 8000" 0"
10" 20" 30" 40" 50" 60" pop

“ If Facebook keep this level of quality open source
release up much longer then soon I'll need to forgive them for Three20 ” - iOS Dev Weekly

• IRC channel • Facebook Page/Group • Mailing lists •
Regular blog posts • Meetups • Hackathons

#8  Leave breadcrumbs

Snapshot Upstream Fly the nest Deprecate Reboot OPEN SOURCE PROJECTS

#9  Understand projects’ lifecycles

Metrics • Total repos • Followers • Forks • Pull-requests
• Issues • Commits June 2013 129 50.1k 11.8k 1,400 (502 days) 404 (323 days) 30.7k July 2014 202 97.6k 20.7k 1,973 (208 days) 427 (186 days) 42.4k

#10  Be open and connected

JAMES PEARCE  @jamespearce

Rebooting Open Source at Facebook

Rebooting Open Source at Facebook

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