fix(nix flake): ensure nix flake builds successfully (#10399)

* Use inference defaults in repo src rather than fetching

there are inference_defaults.json already in the repo so we can use
those, they are regularly updated with github actions, and we avoid hash
mismatch errors in the flake this way

Signed-off-by: Souheab <souheab@protonmail.com>

* Update vendor hash

Signed-off-by: Souheab <souheab@protonmail.com>

* Create react-ui derivation as it is required for go build

Signed-off-by: Souheab <souheab@protonmail.com>

* Add FHS env wrapper to make #!/bin/bash scripts work

Signed-off-by: Souheab <souheab@protonmail.com>

* use pkgs.importNpmLock to deal with npm dependencies instead of using npmDepsHash

Signed-off-by: Souheab <souheab@protonmail.com>

---------

Signed-off-by: Souheab <souheab@protonmail.com>

Author: Souheab

flake.lock

@@ -4,24 +4,36 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    inference-defaults = {
-      url = "https://raw.githubusercontent.com/unslothai/unsloth/main/studio/backend/assets/configs/inference_defaults.json";
-      flake = false;
-    };
   };
 
-  outputs = { self, nixpkgs, inference-defaults }:
+  outputs = { self, nixpkgs }:
     let
       system = "x86_64-linux";
       pkgs = nixpkgs.legacyPackages.${system};
-    in {
-      packages.${system}.default = pkgs.buildGoModule {
+      reactUi = pkgs.buildNpmPackage {
+        pname = "localai-react-ui";
+        version = "custom";
+        src = ./core/http/react-ui;
+        npmDeps = pkgs.importNpmLock {
+          npmRoot = ./core/http/react-ui;
+        };
+        npmConfigHook = pkgs.importNpmLock.npmConfigHook;
+        npmBuildScript = "build";
+
+        installPhase = ''
+          runHook preInstall
+          mkdir -p $out
+          cp -r dist $out/
+          runHook postInstall
+        '';
+      };
+      localai-unwrapped = pkgs.buildGoModule {
         pname = "localai";
         version = "custom";
 
  	src = ./.;
         proxyVendor = true;
-        vendorHash = "sha256-6f3adjGsoFXlUtXjBDHP4Mv9jKCOK3aeUXprm0EAVO8=";
+        vendorHash = "sha256-z3lxQS8mXFuJzvYamejwapwVEmLpeAoiO3ksUKb4I3Q=";
 
         nativeBuildInputs = with pkgs; [
           pkg-config cmake gcc protobuf go-protobuf protoc-gen-go protoc-gen-go-grpc
@@ -44,8 +56,9 @@
 
           go mod edit -replace github.com/mudler/LocalAI/pkg/grpc/proto=./pkg/grpc/proto
 
-          mkdir -p core/config/gen_inference_defaults
-          cp ${inference-defaults} core/config/gen_inference_defaults/inference_defaults.json
+          mkdir -p core/http/react-ui
+          cp -r ${reactUi}/dist core/http/react-ui/dist
+
           sed -i '/go:generate/d' core/config/inference_defaults.go || true
 
 	'';
@@ -57,6 +70,21 @@
           [ -f $out/bin/local-ai ] && mv $out/bin/local-ai $out/bin/localai
         '';
       };
+    in {
+      packages.${system} = {
+        localai-unwrapped = localai-unwrapped;
+
+        default = pkgs.buildFHSEnv {
+          name = "localai";
+          targetPkgs = pkgs: with pkgs; [
+            localai-unwrapped
+            bash
+            coreutils
+            gnugrep
+          ];
+          runScript = "${localai-unwrapped}/bin/localai";
+        };
+      };
 
       devShells.${system}.default = pkgs.mkShell {
         packages = with pkgs; [