infect the repo with Nix (#16)

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -4,3 +4,6 @@
 # convenience script i use for deploying the site to my server, feel free to
 # write your own here too
 /deploy.sh
+
+# direnv (mostly used for Nix)
+.direnv/

flake.lock

@@ -0,0 +1,77 @@
+{
+  "nodes": {
+    "crane": {
+      "locked": {
+        "lastModified": 1729273024,
+        "narHash": "sha256-Mb5SemVsootkn4Q2IiY0rr9vrXdCCpQ9HnZeD/J3uXs=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "fa8b7445ddadc37850ed222718ca86622be01967",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1726560853,
+        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1729265718,
+        "narHash": "sha256-4HQI+6LsO3kpWTYuVGIzhJs1cetFcwT7quWCk/6rqeo=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ccc0c2126893dd20963580b6478d1a10a4512185",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "crane": "crane",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,69 @@
+{
+  description = "a cute metasearch engine";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+    crane.url = "github:ipetkov/crane";
+
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, crane, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+
+        craneLib = crane.mkLib pkgs;
+
+        assetFilter = path: _type: (pkgs.lib.strings.hasPrefix (toString ./src/web/assets) path);
+        sourceFilter = path: type: (craneLib.filterCargoSources path type) || (assetFilter path type);
+
+        # Common arguments can be set here to avoid repeating them later
+        # Note: changes here will rebuild all dependency crates
+        commonArgs = {
+          src = pkgs.lib.cleanSourceWith {
+            src = ./.;
+            filter = sourceFilter;
+            name = "source"; # Be reproducible, regardless of the directory name
+          };
+          strictDeps = true;
+
+          buildInputs = [
+            # Add additional build inputs here
+          ];
+        };
+
+        metasearch2 = craneLib.buildPackage (commonArgs // {
+          cargoArtifacts = craneLib.buildDepsOnly commonArgs;
+
+          # Additional environment variables or build phases/hooks can be set
+          # here *without* rebuilding all dependency crates
+          # MY_CUSTOM_VAR = "some value";
+        });
+      in
+      {
+        checks = {
+          inherit metasearch2;
+        };
+
+        packages.default = metasearch2;
+
+        apps.default = flake-utils.lib.mkApp {
+          drv = metasearch2;
+        };
+
+        devShells.default = craneLib.devShell {
+          # Inherit inputs from checks.
+          checks = self.checks.${system};
+
+          # Additional dev-shell environment variables can be set directly
+          # MY_CUSTOM_DEVELOPMENT_VAR = "something else";
+
+          # Extra inputs can be added here; cargo and rustc are provided by default.
+          packages = [
+            # pkgs.ripgrep
+          ];
+        };
+      });
+}