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# frozen_string_literal: true
module Gitlab
module Tracing
# Only enable tracing when the `GITLAB_TRACING` env var is configured. Note that we avoid using ApplicationSettings since
# the same environment variable needs to be configured for Workhorse, Gitaly and any other components which
# emit tracing. Since other components may start before Rails, and may not have access to ApplicationSettings,
# an env var makes more sense.
def self.enabled?
connection_string.present?
end
def self.connection_string
ENV['GITLAB_TRACING']
end
def self.tracing_url_template
ENV['GITLAB_TRACING_URL']
end
def self.tracing_url_enabled?
enabled? && tracing_url_template.present?
end
# This will provide a link into the distributed tracing for the current trace,
# if it has been captured.
def self.tracing_url
return unless tracing_url_enabled?
# Avoid using `format` since it can throw TypeErrors
# which we want to avoid on unsanitised env var input
tracing_url_template.to_s
.gsub(/\{\{\s*correlation_id\s*\}\}/, Labkit::Correlation::CorrelationId.current_id.to_s)
.gsub(/\{\{\s*service\s*\}\}/, Gitlab.process_name)
end
end
end
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