Add Nix flake for direnv (#6635)

* Add Nix flake for direnv

* Use Sai's suggestion for the `description`

* Make `.envrc` optional

* Move Nix docs to their own section

* Tweak wording

* Tweak wording more

* Add `nixfmt`

---------

Co-authored-by: Sai Praveen Bangaru <31557731+saipraveenb25@users.noreply.github.com>
Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
new file mode 100644
index 000000000..211e5f107
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,33 @@
+{
+  description = "The Slang Shading Language and Compiler";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShell =
+          with pkgs;
+          mkShell {
+            buildInputs = [
+              cmake
+              llvm
+              ninja
+              nixfmt-rfc-style
+              python3
+              xorg.libX11
+            ];
+          };
+      }
+    );
+}