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#!/usr/bin/env bb
(require '[babashka.cli :as cli]
'[babashka.fs :as fs]
'[babashka.process :refer [shell]]
'[clojure.string :as str])
(defn get-hostname []
(let [env-host (System/getenv "HOSTNAME")
etc-host (try (str/trim (slurp "/etc/hostname")) (catch Exception _ nil))
java-host (try (.getHostName (java.net.InetAddress/getLocalHost)) (catch Exception _ nil))]
(first (remove str/blank? [env-host etc-host java-host "default-system"]))))
(def cli-spec
{:spec {:home {:coerce :boolean :desc "Edit home-manager config instead of NixOS config"}
:sys {:desc "Specify system (defaults to current hostname)"}
:user {:default (System/getProperty "user.name")
:desc "Specify user (defaults to current user)"}
:update {:coerce :boolean :default true
:desc "Run auto-update after editing"}
:help {:alias :h :coerce :boolean :desc "Show this help message"}}})
(let [opts (cli/parse-opts *command-line-args* cli-spec)]
(when (:help opts)
(println "Usage: just packages [OPTIONS]")
(println (cli/format-opts cli-spec))
(System/exit 0))
(let [sys (let [s (:sys opts)]
(if (str/blank? s) (get-hostname) s))
target (if (:home opts)
(str "home-manager/" sys "/packages.nix")
(str "nixos/" sys "/packages.nix"))]
(if-not (fs/exists? target)
(do
(binding [*out* *err*]
(println (str ">> Error: Target file does not exist: " target))
(println ">> Please ensure this system profile has been bootstrapped or configured first."))
(System/exit 1))
(do
(println ">> Editing" target "...")
(shell "just" "edit" target)
(if (:update opts)
(do
(println ">> Applying updates...")
(shell "just" "quick-update"))
(println ">> Skipping update (no-update provided)."))))))