Clone this repo:
  1. 75670f9 cipd: Add accessor for current CIPD platform by Rob Mohr · 3 days ago main
  2. 6a3d509 Roll CAS Client from 9ce18dfea456 to c9c95dda5f31 by chromium-autoroll · 9 days ago
  3. 1ae58da [path] Remove api.path.eq() by Rob Mohr · 12 days ago
  4. 9bb9bf2 [exception-db] Include inv_extended_properties_dir in rdb by Hzj_jie · 2 weeks ago
  5. 37f8ad4 Allow recipes to import the typing module. by Garrett Beaty · 2 weeks ago


Recipes are a domain-specific language (embedded in Python) for specifying sequences of subprocess calls in a cross-platform and testable way.

They allow writing build flows which integrate with the rest of LUCI.

Documentation for the recipe engine (including this file!). Take a look at the user guide for some hints on how to get started. See the implementation details doc for more detailed implementation information about the recipe engine.


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

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

# Get `depot_tools` in $PATH if you don't have it
git clone $HOME/src/depot_tools
export PATH="$PATH:$HOME/src/depot_tools"

# Check out the recipe engine repo
git clone $HOME/src/recipes-py

# make your change
cd $HOME/src/recipes-py
git new-branch cool_feature
# hack hack
git commit -a -m "This is awesome"

# This will ask for your Google Account credentials.
git cl upload -s -r
# Wait for approval over email.
# Click "Submit to CQ" button or ask reviewer to do it for you.
# Wait for the change to be tested and landed automatically.

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