feat: add nix flake

flake.lock

@@ -0,0 +1,41 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1684661732,
+        "narHash": "sha256-2/Xo/UmUUoMXc0T5tzoUsYjMLLMjEfzRWDAQB0WwtW0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b0671cbf1e5c443f7fbfd4941ee0f8a151435114",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-22.11",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "systems": "systems"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "id": "systems",
+        "type": "indirect"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,34 @@
+{
+  description = "A jsonnet package manager";
+  inputs.nixpkgs.url = "nixpkgs/nixos-22.11";
+
+  outputs = { self, nixpkgs, systems }:
+  let
+    version = "0.5.1";
+    forEachSystem = nixpkgs.lib.genAttrs (import systems);
+    nixpkgsFor = forEachSystem (system: import nixpkgs { inherit system; });
+  in {
+    # Provide some binary packages for selected system types.
+    packages = forEachSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        jb = pkgs.buildGoModule {
+          pname = "jsonnet-bundler";
+          inherit version;
+
+          src = ./.;
+          CGO_ENABLED = 0;
+
+          ldflags = [ "-s" "-w" "-X main.Version=${version}" ];
+
+          vendorSha256 = "sha256-5a+8emtKjOlSr4V9P2YW5u0FVy9to5rIVfF9i90BCe4=";
+
+          doCheck = false;
+        };
+      }
+    );
+
+    defaultPackage = forEachSystem (system: self.packages.${system}.jb);
+  };
+}