[cmd] Add "dump_specs" command

The new `./recipes.py dump_specs` will print out the repo's
dependencies' recipes.cfg files to stdout. The output is a JSON object
mapping repo names to specs, of the form of the new
recipes_cfg.DepRepoSpecs protobuf:

  {
    "repo_specs" {
      "fuchsia": {
	"api_version": 2,
	"autoroll_recipe_options": {
	  ...
	},
      },
      "recipe_engine": {
	"api_version": 2,
	...
      }
    }
  }

Bug: fuchsia:54380
Change-Id: Iaf8d7a2dd0ed2020142a7030258a795edafa5c8e
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/recipes-py/+/2252547
Commit-Queue: Oliver Newman <olivernewman@google.com>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
3 files changed
tree: 68f2993f41602cf29701ac92d2f638a34e7dde8b
  1. doc/
  2. infra/
  3. misc/
  4. recipe_engine/
  5. recipe_modules/
  6. recipe_proto/
  7. recipes/
  8. unittests/
  9. .gitattributes
  10. .gitignore
  11. .style.yapf
  12. .vpython
  13. AUTHORS
  14. codereview.settings
  15. CONTRIBUTORS
  16. LICENSE
  17. OWNERS
  18. PRESUBMIT.py
  19. README.md
  20. README.recipes.md
  21. recipes.py
README.md

Recipes

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.

Contributing

  • Sign the Google CLA.
  • Make sure your user.email and user.name 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 https://chromium.googlesource.com/chromium/tools/depot_tools.git $HOME/src/depot_tools
export PATH="$PATH:$HOME/src/depot_tools"

# Check out the recipe engine repo
git clone https://chromium.googlesource.com/infra/luci/recipes-py $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 joe@example.com
# 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.