Revamp nix packaging

.gitignore

@@ -1 +1,4 @@
 /target
+
+result
+result-*

default.nix

@@ -1,22 +1,35 @@
 {
   lib
-, fetchFromGitHub
+, stdenv
+, buildPackages
 , rustPlatform
-, makeWrapper
-, mpv
+, installShellFiles
 }:
-
+let
+  cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
+in
 rustPlatform.buildRustPackage rec {
-  pname = "thumbctl";
-  version = "0.1.0";
+  pname = cargoToml.package.name;
+  version = cargoToml.package.version;
   src = lib.cleanSource ./.;
 
-  nativeBuildInputs = [ makeWrapper ];
+  cargoLock.lockFile = ./Cargo.lock;
 
-  cargoHash = "";
+  nativeBuildInputs = [
+    installShellFiles
+  ];
+
+  postInstall = let
+    emulator = stdenv.hostPlatform.emulator buildPackages;
+  in ''
+    installShellCompletion --cmd thumbctl \
+      --bash <(${emulator} $out/bin/thumbctl generate-completions --shell bash) \
+      --zsh <(${emulator} $out/bin/thumbctl generate-completions --shell zsh) \
+      --fish <(${emulator} $out/bin/thumbctl generate-completions --shell fish)
+  '';
 
   meta = with lib; {
-    license = licenses.mit;
+    license = licenses.gpl3Only;
     maintainers = with maintainers; [ h7x4 ];
     platforms = platforms.linux;
     mainProgram = "thumbctl";

flake.nix

@@ -25,7 +25,9 @@
       };
 
       rust-bin = rust-overlay.lib.mkRustBin { } pkgs.buildPackages;
-      toolchain = rust-bin.stable.latest.default;
+      toolchain = rust-bin.stable.latest.default.override {
+        extensions = [ "rust-src" "rust-analyzer" "rust-std" ];
+      };
     in f system pkgs toolchain);
   in {
     apps = forAllSystems (system: pkgs: _: {
@@ -42,12 +44,6 @@
       default = pkgs.mkShell {
         nativeBuildInputs = [
           toolchain
-          pkgs.pkg-config
-        ];
-
-        buildInputs = [
-          # pkgs.systemdLibs.dev
-          pkgs.dbus.dev
         ];
 
         RUST_SRC_PATH = "${toolchain}/lib/rustlib/src/rust/library";