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include source string when registering a devcard #41

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include source string when registering a devcard #41

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87588e5
include source string when registering a devcard
mhuebert Feb 1, 2022
c3e4dde
rename kw for overriding :file
mhuebert Feb 1, 2022
c2d97c3
fix source-reading and show source (ugly)
mhuebert Feb 1, 2022
ce6b616
fix source boundaries
mhuebert Feb 2, 2022
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18 changes: 17 additions & 1 deletion modules/devcards/src/nextjournal/devcards.clj
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Original file line number Diff line number Diff line change
@@ -1,4 +1,6 @@
(ns nextjournal.devcards)
(ns nextjournal.devcards
(:require [clojure.java.io :as io]
[clojure.string :as str]))

(defmacro when-enabled [& body]
`(do ~@body))
Expand Down Expand Up @@ -32,6 +34,19 @@
[env]
(some? (:ns env)))

(defn form-source
"Returns source string for (meta &form)"
[{:as meta :keys [line end-line column end-column file file-string]}]
(let [file-string (or file-string (some-> file io/resource slurp))]
(when-let [file-string (or file-string (some-> file io/resource slurp))]
(let [line (dec line)
column (dec column)]
(-> (str/split-lines file-string)
(update line #(subs % column))
(update (dec end-line) #(subs % 0 (dec end-column)))
(subvec line end-line)
(->> (str/join \newline)))))))

(defmacro defcard
{:arglists '([name ?doc ?argv body ?data])}
[& args]
Expand All @@ -45,6 +60,7 @@
(register-devcard! name
{:data `(fn [] ~data)
:doc doc
:source (form-source (meta &form))
:compile-key (hash data)
:main `(fn [] ~main)}))))

Expand Down