feat: add flake.nix (#86)

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1773840656,
+        "narHash": "sha256-9tpvMGFteZnd3gRQZFlRCohVpqooygFuy9yjuyRL2C0=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "9cf7092bdd603554bd8b63c216e8943cf9b12512",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,35 @@
+# This flake does not package ziex.
+# It allows nix users to `nix run github:ziex-dev/ziex` which builds
+# and runs the `zx` binary. The build is not done inside a sandbox.
+#
+# This allows you to bootstrap a ziex project and then use whatever
+# zig dev environment you are comfortable with.
+{
+  description = "Framework for building web applications with zig";
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+
+  outputs = {nixpkgs, ...}:
+    with builtins;
+    with nixpkgs.lib;
+  let
+    forAllSystems = f: genAttrs systems.flakeExposed (s: f nixpkgs.legacyPackages.${s});
+    src = cleanSource ./.;
+  in {
+    apps = forAllSystems (pkgs: {
+      default = {
+        type = "app";
+        meta.description = "zx: framework for building web applications with zig";
+        program = toString (pkgs.writeShellApplication {
+          name = "zx";
+          runtimeInputs = [pkgs.zig_0_15];
+          text = ''
+            tmp="$(mktemp -d)"
+            trap 'rm -rf "$tmp"' EXIT
+            (cd "${src}" && ZIG_LOCAL_CACHE_DIR="$tmp" zig build -p "$tmp" -Doptimize=Debug)
+            "$tmp/bin/zx" "$@"
+            '';
+        }) + "/bin/zx";
+      };
+    });
+  };
+}