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# frozen_string_literal: true
module Gitlab
module Ci
class YamlProcessor
module FeatureFlags
ACTOR_KEY = 'ci_yaml_processor_feature_flag_actor'
NO_ACTOR_VALUE = :no_actor
NoActorError = Class.new(StandardError)
NO_ACTOR_MESSAGE = "Actor not set. Ensure to call `enabled?` inside `with_actor` block"
class << self
# Cache a feature flag actor as thread local variable so
# we can have it available later with #enabled?
def with_actor(actor)
previous = Thread.current[ACTOR_KEY]
# When actor is `nil` the method `Thread.current[]=` does not
# create the ACTOR_KEY. Instead, we want to still save an explicit
# value to know that we are within the `with_actor` block.
Thread.current[ACTOR_KEY] = actor || NO_ACTOR_VALUE
yield
ensure
Thread.current[ACTOR_KEY] = previous
end
# Use this to check if a feature flag is enabled
def enabled?(feature_flag)
::Feature.enabled?(feature_flag, current_actor)
end
private
def current_actor
value = Thread.current[ACTOR_KEY] || (raise NoActorError, NO_ACTOR_MESSAGE)
return if value == NO_ACTOR_VALUE
value
rescue NoActorError => e
Gitlab::ErrorTracking.track_and_raise_for_dev_exception(e)
nil
end
end
end
end
end
end
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