24 lines
1.1 KiB
Ruby
24 lines
1.1 KiB
Ruby
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# frozen_string_literal: true
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# Gitlab.com uses Snowplow for identifying users and events.
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# https://gitlab.com/gitlab-org/gitlab/issues/6329
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#
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# SnowplowTracker write log into STDERR
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# https://github.com/snowplow/snowplow-ruby-tracker/blob/39fcfa2be793f2e25e73087a9700abc93f43b5e8/lib/snowplow-tracker/emitters.rb#L23
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# `LOGGER = Logger.new(STDERR)`
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#
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# In puma.rb, if `stdout_redirect` specify stderr, Puma will overwrite STDERR in:
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# https://github.com/puma/puma/blob/b41205f5cacbc2ad0060472bdce68ba636f42175/lib/puma/runner.rb#L134
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# `STDERR.reopen stderr, (append ? "a" : "w")`
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# As a result, SnowplowTracker will log into Puma stderr, when Puma enabled.
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#
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# By default, SnowplowTracker uses default log formatter.
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# When enable Puma, SnowplowTracker log is expected to be JSON format, as part of puma_stderr.log.
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# Hence overwrite ::SnowplowTracker::LOGGER.formatter to JSON formatter
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if defined?(::Puma) && defined?(::SnowplowTracker::LOGGER)
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::SnowplowTracker::LOGGER.formatter = proc do |severity, datetime, progname, msg|
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{ severity: severity, timestamp: datetime.utc.iso8601(3), pid: $$, progname: progname, message: msg }.to_json << "\n"
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end
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end
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