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johanatan/log-opts.cljs

Created March 15, 2016 21:53
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log-opts (bunyan helper)
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log-opts.cljs
(defn log-opts [logger level msg & params]
(let [amap (apply array-map params)
expected (count (re-seq #"%s|%d|%j" msg))
args (flatten [amap msg (if (not (empty? amap)) (take expected (vals amap)))])]
(.apply (aget logger level) logger (clj->js (remove nil? args)))))
@johanatan
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It can be used like so:

(log-opts logger "info" "A static message." :some-key some-val :another-one another-val)
(log-opts logger "info" "Formatted message: %s" :a-key a-val)

There can be more key/value pairs provided than placeholders in the formatted message (extras are just dropped as format params but still provided as part of options object for Bunyan to produce JSON from).

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