#!/Usr/bin/env joker

;; Usage: toolchain-report
;; 
;; This tool queries a set of defined packages in your "toolchain" and
;; reports the versions of those packages in a map.  There are no
;; command line flags or options for this script.

(ns main
  (:require [joker.os :as os]))


;; The "toolchain" is defined as a vector of maps that define how to
;; query for version. We expect every tool has some command line flag
;; that writes the version info to stdout or stderr, but each tool
;; might format that output in some unique way. Therefore we specify a
;; regular expression pattern that will be used to extract the version
;; from the output.
;;
;; Easiest to show an example:
;; 
;;  {
;;    :key :yarn                ; each tool has a unique key
;;    :cmd ["yarn" "-v"]        ; executing this prints the version
;;    :pattern #"(.*)\n"        ; this regexp extracts the version #
;;    :output :out              ; :out = stdout, :err = stderr
;;  }
;;
;; The default is to grab everything from stdout up to the first
;; newline '\n', so our example can be shortened:
;;
;;  {:key :yarn :cmd ["yarn" "-v"]}
;;

(def toolchain
  [
;; operating system
   {:key :os-name
    :cmd ["clojure" "-e" "(System/getProperty \"os.name\")"]
    :pattern #"\"(.*)\""}
   {:key :os-version
    :cmd ["clojure" "-e" "(System/getProperty \"os.version\")"]
    :pattern #"\"(.*)\""}
   {:key :todays-date
    :cmd ["clojure" "-e" "(.toString (java.time.LocalDate/now))"]}

;; clojure/clojurescript tools
   {:key :clojure
    :cmd ["clj" "-Stree"]
    :pattern #"org.clojure/clojure\s+(.*)\n"}
   {:key :clojurescript
    :cmd ["clj" "-Stree"]
    :pattern #"org.clojure/clojurescript\s+(.*)\n"}
   {:key :shadow-cljs-jar
    :cmd ["shadow-cljs" "info"]
    :pattern #"jar:\s+(.*)\n"}
   {:key :shadow-cljs-cli
    :cmd ["shadow-cljs" "info"]
    :pattern #"cli:\s+(.*)\n"}

;; react native toolchain
   {:key :expo-cli :cmd ["expo-cli" "-V"]}

;; javascript tools
   {:key :node :cmd ["node" "-v"]}
   {:key :yarn :cmd ["yarn" "-v"]}

;; libraries / packages
   {:key :expo-js
    :cmd ["yarn" "list"]
    :pattern #"\s+expo@(.*)\n"}
   {:key :react
    :cmd ["yarn" "list"]
    :pattern #"\s+react@(.*)\n"}
   {:key :react-native
    :cmd ["yarn" "list"]
    :pattern #"\s+react-native@(.*)\n"}
   {:key :reagent
    :cmd ["clj" "-Stree"]
    :pattern #"reagent/reagent\s+(.*)\n"}
   {:key :re-frame
    :cmd ["clj" "-Stree"]
    :pattern #"re-frame/re-frame\s+(.*)\n"}

;; java jdk
   {:key :jdk-vendor
    :cmd ["java" "-version"]
    :output :err
    :pattern #"(.*)\s+version"}
   {:key :jdk-version
    :cmd ["java" "-version"]
    :output :err
    :pattern #"version\s+\"(.*)\"\n"}
])

(def sh-memoized (memoize #(apply os/sh %)))

(defn check [{:keys [key cmd output pattern]
              :or {output :out pattern #"(.*)\n"}}]
  (let [result (try (sh-memoized cmd)
                    (catch Error e {:success nil}))]
    (if (:success result)
      {key (-> (re-find pattern (output result))
               (get 1))}
      {key nil})))

(defn print-sorted-keys [m]
  ;; hack because joker doesn't provide sorted-map
  (println "{")
  (doseq [k (sort (keys m))]
    (printf "  %s \"%s\"\n" k (k m)))
  (println "}"))

;; run all queries and print the result
(print-sorted-keys (->> (map check toolchain)
                        (apply merge)))