feat(repl): make it work with onDroid

packages/repl/default.nix

@@ -2,25 +2,40 @@
 {
   coreutils,
   gnused,
-  writeShellScriptBin,
+  ncurses,
+  writeShellApplication,
   ...
 }: let
   repl = ./repl.nix;
-  example = command: desc: ''\n\u001b[33m ${command}\u001b[0m - ${desc}'';
+  example = command: desc: ''\n$(tput setaf 3) ${command}$(tput sgr0) - ${desc}'';
 in
-  writeShellScriptBin "repl" ''
-    case "$1" in
+  writeShellApplication {
+    name = "repl";
+
+    runtimeInputs = [coreutils gnused ncurses];
+
+    text = ''
+      arg=''${1:-"."}
+
+      case "$arg" in
           "-h"|"--help"|"help")
-        printf "%b\n\e[4mUsage\e[0m: \
-          ${example "repl" "Loads system flake if available."} \
-          ${example "repl /path/to/flake.nix" "Loads specified flake."}\n"
+              # shellcheck disable=SC2059
+              printf "\n\e[4mUsage\e[0m: \
+                  ${example "repl             " "Loads system flake present at $(tput setaf 4)\\$FLAKE$(tput sgr0)."} \
+                  ${example "repl <flake path>" "Loads specified flake."}\n"
           ;;
+
           *)
-        if [ -z "$1" ]; then
-          nix repl --arg flakePath $(${coreutils}/bin/readlink -f "$FLAKE") --file ${repl}
+              if [ -z "$arg" ]; then
+                  nix repl \
+                      --arg flakePath "$(realpath "$FLAKE")" \
+                      --file ${repl}
               else
-          nix repl --arg flakePath $(${coreutils}/bin/readlink -f $1 | ${gnused}/bin/sed 's|/flake.nix||') --file ${repl}
+                  nix repl \
+                      --arg flakePath "$(realpath "$arg" | sed 's|/flake.nix||')" \
+                      --file ${repl}
               fi
           ;;
       esac
-  ''
+    '';
+  }

packages/repl/repl.nix

@@ -1,49 +1,31 @@
 {
-  flakePath ? null,
+  flakePath,
   hostnamePath ? "/etc/hostname",
-  registryPath ? /etc/nix/registry.json,
 }: let
-  inherit (builtins) getFlake head match currentSystem readFile pathExists filter fromJSON;
+  inherit (builtins) currentSystem getFlake head match pathExists readFile removeAttrs;
 
-  selfFlake =
-    if pathExists registryPath
-    then filter (it: it.from.id == "self") (fromJSON (readFile registryPath)).flakes
-    else [];
-
-  flakePath' =
-    toString
-    (
-      if flakePath != null
-      then flakePath
-      else if selfFlake != []
-      then (head selfFlake).to.path
-      else "/etc/nixos"
-    );
-
-  flake =
-    if pathExists flakePath'
-    then getFlake flakePath'
-    else {};
   hostname =
     if pathExists hostnamePath
     then head (match "([a-zA-Z0-9\\-]+)\n" (readFile hostnamePath))
     else "";
 
-  nixpkgsFromInputsPath = flake.inputs.nixpkgs.outPath or "";
-  nixpkgs =
-    flake.pkgs.${currentSystem}.nixpkgs
-    or (
-      if nixpkgsFromInputsPath != ""
-      then import nixpkgsFromInputsPath {}
-      else {}
-    );
+  self =
+    if pathExists flakePath
+    then
+      removeAttrs (getFlake (toString flakePath)) [
+        # If you use flakegen, these take a lot of space
+        "nextFlake"
+        "nextFlakeSource"
+      ]
+    else {};
 
-  nixpkgsOutput = removeAttrs (nixpkgs // nixpkgs.lib or {}) ["options" "config"];
+  pkgs = self.inputs.nixpkgs.legacyPackages.${currentSystem} or {};
+  lib =
+    if pkgs != {}
+    then {inherit (pkgs) lib;}
+    else {};
 in
-  {inherit flake;}
-  // flake
-  // builtins
-  // (flake.nixosConfigurations or {})
-  // flake.nixosConfigurations.${hostname} or {}
-  // nixpkgsOutput
-  // {getFlake = path: getFlake (toString path);}
+  {inherit lib pkgs self;}
+  // self.nixosConfigurations.${hostname}
+  or self.nixOnDroidConfigurations.default
+  or {}