add nix package, devshell and an .envrc

.envrc

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

.gitignore

@@ -1,5 +1,7 @@
 /target
 .env
+.direnv
+.result
 reference-pds-hailey/
 reference-pds-bsky/
 reference-relay-indigo/

default.nix

@@ -0,0 +1,37 @@
+{
+  lib,
+  rustPlatform,
+  pkg-config,
+  openssl,
+}: let
+  toml = (lib.importTOML ./Cargo.toml).package;
+in rustPlatform.buildRustPackage {
+  pname = "tranquil-pds";
+  inherit (toml) version;
+
+  src = lib.fileset.toSource {
+    root = ./.;
+    fileset = lib.fileset.intersection (lib.fileset.fromSource (lib.sources.cleanSource ./.)) (
+      lib.fileset.unions [
+        ./Cargo.toml
+        ./Cargo.lock
+        ./src
+	./.sqlx
+	./migrations
+	./frontend
+      ]
+    );
+  };
+
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
+  buildInputs = [
+    openssl
+  ];
+
+  cargoLock.lockFile = ./Cargo.lock;
+
+  doCheck = false;
+}

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1766314097,
+        "narHash": "sha256-laJftWbghBehazn/zxVJ8NdENVgjccsWAdAqKXhErrM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "306ea70f9eb0fb4e040f8540e2deab32ed7e2055",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,19 @@
+{
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+  outputs = { self, nixpkgs, ... }: let
+    forAllSystems =
+      function:
+      nixpkgs.lib.genAttrs nixpkgs.lib.systems.flakeExposed (
+        system: function nixpkgs.legacyPackages.${system}
+      );
+  in {
+    packages = forAllSystems (pkgs: {
+      tranquil-pds = pkgs.callPackage ./default.nix { };
+      default = self.packages.${pkgs.stdenv.hostPlatform.system}.tranquil-pds;
+    });
+
+    devShells = forAllSystems (pkgs: {
+      default = pkgs.callPackage ./shell.nix { };
+    });
+  };
+}

shell.nix

@@ -0,0 +1,38 @@
+{
+  mkShell,
+  callPackage,
+  rustPlatform,
+
+  # repo tooling
+  just,
+  podman,
+  podman-compose,
+
+  # rust tooling
+  clippy,
+  rustfmt,
+  rust-analyzer,
+
+  # frontend tooling
+  deno,
+}: let
+  defaultPackage = callPackage ./default.nix { };
+in mkShell {
+  inputsFrom = [ defaultPackage ];
+
+  env = {
+    RUST_SRC_PATH = rustPlatform.rustLibSrc;
+  };
+
+  packages = [
+    just
+    podman
+    podman-compose
+
+    clippy
+    rustfmt
+    rust-analyzer
+
+    deno
+  ];
+}