Clone this repo:
  1. a890ea9 Escape newlines when writing enviroment values to execution logs. by Garrett Beaty · 10 hours ago master
  2. 86003d0 Add "pipe" helpers for multiprocess communication. by Robert Iannucci · 11 hours ago
  3. 4579203 Add coverage pattern information directly to RecipeDeps. by Robert Iannucci · 11 hours ago
  4. eeac8fc Redact line numbers for traceback frames which originate outside the by Robert Iannucci · 14 hours ago
  5. 5619081 Fix error in doc/ by Robert Iannucci · 15 hours 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.