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janet/tools/update_copyright.janet
2025-03-04 11:31:56 +09:00

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(def usage (string "usage: janet " (first (dyn :args)) " <last-year> <this-year>"))
(def ignores [".git"])
(def exts ["LICENSE" "Makefile" ".build" ".c" ".h" ".janet"])
(defn arg [i]
(defn bail [] (print usage) (quit))
(if-not (= 3 (length (dyn :args)))
(bail)
(if-let [val (get (dyn :args) i)]
val
(bail))))
(def oy (arg 1))
(def ny (arg 2))
(def od (string "Copyright (c) " oy " Calvin Rose"))
(def nd (string "Copyright (c) " ny " Calvin Rose"))
(defn join [dir name]
(os/realpath (string dir "/" name)))
(defn add-children [dir paths]
(loop [name :in (os/dir dir)
:unless (has-value? ignores name)]
(array/push paths (join dir name))))
(defn ends-in? [exts s]
(find (fn [ext] (string/has-suffix? ext s)) exts))
(defn update-disclaimer [path]
(if-let [_ (ends-in? exts path)
oc (slurp path)
pos (string/find od oc)
nc (string (string/slice oc 0 pos) nd (string/slice oc (+ pos (length od))))]
(spit path nc)))
(def cwd (os/cwd))
(def paths (if (string/has-suffix? "janet" cwd)
@[cwd]
@[(join cwd "..")]))
(loop [p :in paths]
(if (= :directory ((os/stat p) :mode))
(add-children p paths)
(update-disclaimer p)))