Clone this repo:
  1. 829145d [swarming] log on_after_task hook arguments by Junji Watanabe · 10 hours ago master
  2. 1d4fdbd [swarming] implement realms.check_tasks_run_as by Junji Watanabe · 11 hours ago
  3. cd972b3 [swarming] check PoolCfg at early stage of task scheduling API by Junji Watanabe · 17 hours ago
  4. bfc8e16 client: update isolated client by Takuto Ikuta · 4 days ago
  5. fd96dcf [swarming-ui] set SHELL in Makefile by Junji Watanabe · 5 days ago


LUCI is an ensemble of services that work together to run large scale CI (continuous integration) infrastructure to get results in O(1). It is used by the Chromium project.

See appengine/ for the services provided.


A complete CI toolkit:

  • Strict separation between task distribution and file distribution.
    • Swarming distributes tasks across an army (thousands) of Swarming bots.
    • Isolate server distributes 10s of thousands of files per task.
  • Federated authentication and ACL.
  • git based configuration data propagation.
  • Automatic Google Compute Engine VM recycling.
  • Windows, OSX and Linux (Ubuntu), used with Android, iOS, ChromeOS.
  • Written in python 2.7 along Go tools.
  • Used by the Chromium infrastructure and other teams.


  1. Install Google AppEngine SDK.
  2. git clone

Code layout


  • Branch master constains the latest code.
  • Branch stable contains the stable code.


  • Sign the Google CLA.
  • See the coding style.
  • Make sure your and are configured in git config.

Run the following to setup the code review tool and create your first review:

git clone $HOME/src/depot_tools
export PATH="$PATH:$HOME/src/depot_tools"
cd luci-py
git checkout -b work origin/master

# hack hack

git commit -a -m "This is awesome\"
# This will ask for your Google Account credentials.
git cl upload -s
# Wait for LGTM over email.
# Check the commit queue box in codereview website.
# Wait for the change to be tested and landed automatically.

Use git cl help and git cl help <cmd> for more details.


The preferred style is PEP8 with two-space indent; that is, the Chromium Python style, except functions use lowercase_with_underscores. Use yapf (git cl format) to autoformat new code.


This project is licensed under Apache v2.0 license. See LICENSE for details.