revert(nix): Restore shell.nix

This file is templated from https://github.com/stackabletech/operator-templating/blob/main/template/shell.nix

Author: NickLarsenNZ

shell.nix

@@ -1,21 +1,11 @@
 let
-  self = import ./. { };
+  self = import ./. {};
   inherit (self) sources pkgs meta;
 
-  beku = pkgs.callPackage (sources."beku.py" + "/beku.nix") { };
-  cargoDependencySetOfCrate =
-    crate:
-    [ crate ]
-    ++ pkgs.lib.concatMap cargoDependencySetOfCrate (crate.dependencies ++ crate.buildDependencies);
-  cargoDependencySet = pkgs.lib.unique (
-    pkgs.lib.flatten (
-      pkgs.lib.mapAttrsToList (
-        crateName: crate: cargoDependencySetOfCrate crate.build
-      ) self.cargo.workspaceMembers
-    )
-  );
-in
-pkgs.mkShell rec {
+  beku = pkgs.callPackage (sources."beku.py" + "/beku.nix") {};
+  cargoDependencySetOfCrate = crate: [ crate ] ++ pkgs.lib.concatMap cargoDependencySetOfCrate (crate.dependencies ++ crate.buildDependencies);
+  cargoDependencySet = pkgs.lib.unique (pkgs.lib.flatten (pkgs.lib.mapAttrsToList (crateName: crate: cargoDependencySetOfCrate crate.build) self.cargo.workspaceMembers));
+in pkgs.mkShell rec {
   name = meta.operator.name;
 
   packages = with pkgs; [
@@ -34,25 +24,21 @@ pkgs.mkShell rec {
   buildInputs = pkgs.lib.unique (pkgs.lib.concatMap (crate: crate.buildInputs) cargoDependencySet);
 
   # build time dependencies
-  nativeBuildInputs = pkgs.lib.unique (
-    pkgs.lib.concatMap (crate: crate.nativeBuildInputs) cargoDependencySet
-    ++ (with pkgs; [
-      beku
-      docker
-      gettext # for the proper envsubst
-      git
-      jq
-      kind
-      kubectl
-      kubernetes-helm
-      kuttl
-      nix # this is implied, but needed in the pure env
-      # tilt already defined in default.nix
-      which
-      yq-go
-      grpcurl # for interacting with the Vector API
-    ])
-  );
+  nativeBuildInputs = pkgs.lib.unique (pkgs.lib.concatMap (crate: crate.nativeBuildInputs) cargoDependencySet ++ (with pkgs; [
+    beku
+    docker
+    gettext # for the proper envsubst
+    git
+    jq
+    kind
+    kubectl
+    kubernetes-helm
+    kuttl
+    nix # this is implied, but needed in the pure env
+    # tilt already defined in default.nix
+    which
+    yq-go
+  ]));
 
   LIBCLANG_PATH = "${pkgs.libclang.lib}/lib";
   BINDGEN_EXTRA_CLANG_ARGS = "-I${pkgs.glibc.dev}/include -I${pkgs.clang}/resource-root/include";