add nix flake and devenv configuration

.gitignore

@@ -1,2 +1,14 @@
 /target
-.env
+/result
+.env
+
+# Devenv
+.devenv*
+devenv.local.nix
+devenv.local.yaml
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml

default.nix

@@ -0,0 +1,6 @@
+{ rustPlatform }:
+rustPlatform.buildRustPackage {
+  name = "mensa-upb-api";
+  src = ./.;
+  cargoLock.lockFile = ./Cargo.lock;
+}

devenv.lock

@@ -0,0 +1,103 @@
+{
+  "nodes": {
+    "devenv": {
+      "locked": {
+        "dir": "src/modules",
+        "lastModified": 1783427201,
+        "narHash": "sha256-oaA0ap7w1XF1P5w4IpP+F4XfLwww2R9ht8MW1auaOms=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "821e0be605bd00b1aaf6113406c4babc3ce12d23",
+        "type": "github"
+      },
+      "original": {
+        "dir": "src/modules",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1767039857,
+        "narHash": "sha256-vNpUSpF5Nuw8xvDLj2KCwwksIbjua2LZCqhV1LNRDns=",
+        "owner": "NixOS",
+        "repo": "flake-compat",
+        "rev": "5edf11c44bc78a0d334f6334cdaf7d60d732daab",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "git-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1783008725,
+        "narHash": "sha256-jGiy6+sxjNWXSjp25uoJuNfyH9zBK1PEDY0lVoL4ibQ=",
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "bca82caa46d5ec0f5d422c61fb1e30bc51313cbe",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "inputs": {
+        "nixpkgs-src": "nixpkgs-src"
+      },
+      "locked": {
+        "lastModified": 1783345554,
+        "narHash": "sha256-LZhOm4kqjHUnwP4CNHpaqqEVcumGNd1PvOEOad8LkS0=",
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "6004ea8c229fe9d41b21c6f4c76bf6c2e10771dd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1783279667,
+        "narHash": "sha256-/NAkDSsve+GNM0Bt6tleJdCGfsTlK89nPjkVOzZMo0s=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "f205b5574fd0cb7da5b702a2da51507b7f4fdd1b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "git-hooks": "git-hooks",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

devenv.nix

@@ -0,0 +1,40 @@
+{
+  pkgs,
+  lib,
+  config,
+  inputs,
+  ...
+}:
+{
+  packages = [ pkgs.git pkgs.sqlx-cli ];
+
+  languages.rust.enable = true;
+
+  env.DATABASE_URL = "postgres://mensa-upb:mensa-upb@${config.services.postgres.listen_addresses}:${toString config.services.postgres.port}/mensa-upb";
+
+  services.postgres = {
+    enable = true;
+    initialDatabases = [
+      {
+        name = "mensa-upb";
+        user = "mensa-upb";
+        pass = "mensa-upb";
+      }
+    ];
+    listen_addresses = "localhost";
+  };
+
+  git-hooks.hooks = {
+    clippy.enable = true;
+
+    sqlx-prepare = {
+      enable = true;
+
+      name = "Run cargo sqlx prepare";
+      entry = "cargo sqlx prepare --workspace --no-dotenv";
+      pass_filenames = false;
+    };
+  };
+
+  # See full reference at https://devenv.sh/reference/options/
+}

devenv.yaml

@@ -0,0 +1,8 @@
+inputs:
+  git-hooks:
+    url: github:cachix/git-hooks.nix
+    inputs:
+      nixpkgs:
+        follows: nixpkgs
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1783224372,
+        "narHash": "sha256-8i/87eeoqiGE4yOTjwSA3Eh/ziJRQEmd/unYU+K27sk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "d407951447dcd00442e97087bf374aad70c04cea",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "Mensa UPB scraper and API";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs =
+    { self, nixpkgs }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in
+    {
+
+      packages.${system}.default = pkgs.callPackage ./default.nix { };
+
+      devShells.${system}.default = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          devenv
+          cargo
+          rustc
+          rustfmt
+          clippy
+          rust-analyzer
+          sqlx-cli
+        ];
+        env.RUST_SRC_PATH = pkgs.rust.packages.stable.rustPlatform.rustLibSrc;
+      };
+
+    };
+}