Nix flake (#40)

* Nix flake

* Nix: only add Accelerate framework on macOS

* Nix: development shel, direnv and compatibility

* Nix: use python packages supplied by withPackages

* Nix: remove channel compatibility

* Nix: fix ARM neon dotproduct on macOS

---------

Co-authored-by: Pavol Rusnak <pavol@rusnak.io>

3 files changed, 95 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 5eb1ff1..3087b0e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,10 @@ models/*
 
 /main
 /quantize
+/result
 
 arm_neon.h
 compile_commands.json
+
+.envrc
+.direnv/
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..343996d
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,43 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1676283394,
+        "narHash": "sha256-XX2f9c3iySLCw54rJ/CZs+ZK6IQy7GXNY4nSOyu2QG4=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "3db36a8b464d0c4532ba1c7dda728f4576d6d073",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1678470307,
+        "narHash": "sha256-OEeMUr3ueLIXyW/OaFUX5jUdimyQwMg/7e+/Q0gC/QE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "0c4800d579af4ed98ecc47d464a5e7b0870c4b1f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..dae4ff6
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,48 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+        llama-python = pkgs.python310.withPackages (ps: with ps; [
+          torch
+          numpy
+          sentencepiece
+        ]);
+      in
+      {
+        packages.default = pkgs.stdenv.mkDerivation {
+          name = "llama.cpp";
+          src = ./.;
+          nativeBuildInputs = with pkgs; [ cmake ];
+          buildInputs = with pkgs; lib.optionals stdenv.isDarwin [
+            darwin.apple_sdk.frameworks.Accelerate
+          ];
+          cmakeFlags = with pkgs; lib.optionals (system == "aarch64-darwin") [
+            "-DCMAKE_C_FLAGS=-D__ARM_FEATURE_DOTPROD=1"
+          ];
+          installPhase = ''
+            mkdir -p $out/bin
+            mv llama $out/bin/llama
+            mv quantize $out/bin/quantize
+            echo "#!${llama-python}/bin/python" > $out/bin/convert-pth-to-ggml
+            cat ${./convert-pth-to-ggml.py} >> $out/bin/convert-pth-to-ggml
+            chmod +x $out/bin/convert-pth-to-ggml
+          '';
+        };
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [
+            cmake
+            llama-python
+          ] ++ lib.optionals stdenv.isDarwin [
+            darwin.apple_sdk.frameworks.Accelerate
+          ];
+        };
+      }
+    );
+}