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infra / config / lib / recipe_experiments.star [blame]
# Copyright 2021 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Library for enabling experiments on a per-recipe basis.
For each experiment registered for a recipe, if a builder that uses the recipe
does not have the experiment set, it will be set with the percentage specified
for the recipe.
See //recipes.star for information on setting experiments for a recipe.
"""
load("@stdlib//internal/graph.star", "graph")
load("./nodes.star", "nodes")
_RECIPE_EXPERIMENTS = nodes.create_unscoped_node_type("recipe_experiments")
_RECIPE_EXPERIMENTS_REF = nodes.create_bucket_scoped_node_type("recipe_experiments_ref")
def register_recipe_experiments(recipe, experiments):
_RECIPE_EXPERIMENTS.add(recipe, props = {
"experiments": experiments,
})
def register_recipe_experiments_ref(bucket, builder, recipe):
key = _RECIPE_EXPERIMENTS_REF.add(bucket, builder)
graph.add_edge(key, _RECIPE_EXPERIMENTS.key(recipe))
def _set_recipe_experiments(ctx):
cfg = None
for f in ctx.output:
if f.startswith("luci/cr-buildbucket"):
cfg = ctx.output[f]
break
if cfg == None:
fail("There is no buildbucket configuration file to reformat properties")
for bucket in cfg.buckets:
if not proto.has(bucket, "swarming"):
continue
bucket_name = bucket.name
for builder in bucket.swarming.builders:
builder_name = builder.name
recipe_experiments_nodes = graph.children(_RECIPE_EXPERIMENTS_REF.key(bucket_name, builder_name), _RECIPE_EXPERIMENTS.kind)
if len(recipe_experiments_nodes) != 1:
fail("Each builder should refer to 1 recipe")
recipe_experiments_node = recipe_experiments_nodes[0]
for experiment, percentage in recipe_experiments_node.props.experiments.items():
builder.experiments.setdefault(experiment, percentage)
lucicfg.generator(_set_recipe_experiments)