shell: add command descriptions

shell.nix

@@ -16,37 +16,62 @@ let
   }).config.system.build;
 
   flk = pkgs.writeShellScriptBin "flk" ''
-    if [[ -z $1 ]]; then
-      echo "Usage: $(basename $0) [ iso | install {host} | {host} [switch|boot|test] ]"
-    elif [[ $1 == "iso" ]]; then
+    if [[ -z "$1" || "$1" == "help" || "--help" || "-h" ]]; then
+      echo "Usage: $(basename "$0") [ iso | install {host} | {host} [switch|boot|test] ]"
+    elif [[ "$1" == "iso" ]]; then
       nix build ${configs}.niximg.${build}.isoImage
-    elif [[ $1 == "install" ]]; then
+    elif [[ "$1" == "install" ]]; then
       sudo nixos-install --flake ".#$2" "${"\${@:3}"}"
     else
       sudo nixos-rebuild --flake ".#$1" "${"\${@:2}"}"
     fi
   '';
 
-  nix = pkgs.writeShellScriptBin "nix" ''
-    ${pkgs.nixFlakes}/bin/nix --option experimental-features "nix-command flakes ca-references" "$@"
-  '';
+  name = "flk";
 in
 pkgs.mkDevShell {
-  name = "nixflk";
+  inherit name;
 
   packages = with pkgs; with installPkgs; [
-    git
     git-crypt
-    flk
-    nix
-    nixpkgs-fmt
-    python38Packages.grip
     nixos-install
     nixos-generate-config
     nixos-enter
-    nixos-rebuild
   ];
 
-  env = { };
+  env = { inherit name; };
+
+  commands = with pkgs; [
+    {
+      name = nixpkgs-fmt.pname;
+      package = nixpkgs-fmt;
+      help = nixpkgs-fmt.meta.description;
+      category = "linters";
+    }
+    {
+      name = flk.name;
+      help = "Build, deploy, and install nixflk";
+      category = "main";
+      package = flk;
+    }
+    {
+      name = "grip";
+      help = python38Packages.grip.meta.description;
+      category = "servers";
+      package = python38Packages.grip;
+    }
+    {
+      name = git.pname;
+      help = git.meta.description;
+      category = "vcs";
+      package = git;
+    }
+    {
+      name = "nix";
+      help = nixFlakes.meta.description;
+      category = "main";
+      command = ''${nixFlakes}/bin/nix --option experimental-features "nix-command flakes ca-references" "$@"'';
+    }
+  ];
 
 }