nix: initial tooling

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I5e9bfbc614604329d54240c02f620e156a6a6964

.envrc

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+use nix

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1768886240,
+        "narHash": "sha256-C2TjvwYZ2VDxYWeqvvJ5XPPp6U7H66zeJlRaErJKoEM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "80e4adbcf8992d3fd27ad4964fbb84907f9478b0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "NodeJS Project Template";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
+
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
+    systems = ["x86_64-linux" "aarch64-linux"];
+    forEachSystem = nixpkgs.lib.genAttrs systems;
+    pkgsForEach = nixpkgs.legacyPackages;
+  in {
+    packages = forEachSystem (system: {
+      default = pkgsForEach.${system}.callPackage ./nix/package.nix {};
+    });
+
+    devShells = forEachSystem (system: {
+      default = pkgsForEach.${system}.callPackage ./shell.nix {};
+    });
+
+    hydraJobs = self.packages;
+  };
+}

nix/package.nix

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+{
+  lib,
+  stdenv,
+  fetchPnpmDeps,
+  nodejs-slim,
+  pnpm,
+  pnpmConfigHook,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "nix-evaluator-stats";
+  version = "0.1.0";
+
+  src = ../.;
+
+  nativeBuildInputs = [
+    nodejs-slim
+    pnpm
+    pnpmConfigHook # dependency resolution
+  ];
+
+  pnpmDeps = fetchPnpmDeps {
+    inherit (finalAttrs) pname src;
+    hash = "sha256-CpfaUvQbvOXljCqNwyMUJNDisnlrWCHBwhmdIzjmv+c=";
+    fetcherVersion = 3; # https://nixos.org/manual/nixpkgs/stable/#javascript-pnpm-fetcherVersion
+  };
+
+  buildPhase = ''
+    runHook preBuild
+
+    mkdir -p $out/share/dist
+    pnpm run build --outDir $out/share/dist
+
+    runHook postBuild
+  '';
+
+  meta = {
+    description = "Pretty visualiser for Nix evaluator stats";
+    homepage = "https://github.com/notashelf/nix-evaluator-stats";
+    platforms = ["x86_64-linux" "aarch64-linux"];
+    license = lib.licenses.mpl20;
+    maintainers = [lib.maintainers.NotAShelf];
+  };
+})

shell.nix

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+{pkgs ? import <nixpkgs> {}}:
+pkgs.mkShell {
+  packages = [
+    pkgs.nodejs-slim
+    pkgs.pnpm
+  ];
+}