chore(nix): Add dev sub-flake

.envrc

@@ -0,0 +1,2 @@
+watch_file dev/flake.nix
+use flake ./dev

.gitignore

@@ -1,5 +1,7 @@
+/.direnv
+
 /example/data.sqlite*
 /example/result
 
 /test/data.sqlite
-/test/result.txt
+/test/result.txt

dev/flake.lock

@@ -0,0 +1,115 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1685662779,
+        "narHash": "sha256-cKDDciXGpMEjP1n6HlzKinN0H+oLmNpgeCTzYnsA2po=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "71fb97f0d875fd4de4994dfb849f2c75e17eb6c3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1709613862,
+        "narHash": "sha256-mH+c2gFEzEe49lhUWJ0ieIaMaJ1W85E6G1xLm8ege90=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "311a4be96d940a0c673e88bd5bc83ea4f005cc02",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "dir": "lib",
+        "lastModified": 1685564631,
+        "narHash": "sha256-8ywr3AkblY4++3lIVxmrWZFzac7+f32ZEhH/A8pNscI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "4f53efe34b3a8877ac923b9350c874e3dcd5dc0a",
+        "type": "github"
+      },
+      "original": {
+        "dir": "lib",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1680945546,
+        "narHash": "sha256-8FuaH5t/aVi/pR1XxnF0qi4WwMYC+YxlfdsA0V+TEuQ=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "d9f759f2ea8d265d974a6e1259bd510ac5844c5d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "process-compose-flake": {
+      "locked": {
+        "lastModified": 1712910508,
+        "narHash": "sha256-mCF2EcBoQMXY2P9q3d0cuhmpDzeInLt4KcW1JzrcMqk=",
+        "owner": "Platonic-Systems",
+        "repo": "process-compose-flake",
+        "rev": "e3292f80372cbc567ebda5deab5e451de5c5155c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Platonic-Systems",
+        "repo": "process-compose-flake",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs",
+        "process-compose-flake": "process-compose-flake",
+        "treefmt-nix": "treefmt-nix"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1688916551,
+        "narHash": "sha256-YsGzTjtYwJ7j8TTIjo0cImycGAvUT1UXq2sCZ8Vu0Wc=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "3fadb6baac68068dc0196f35d3e092bf316d4409",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

dev/flake.nix

@@ -0,0 +1,29 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    treefmt-nix.url = "github:numtide/treefmt-nix";
+    process-compose-flake.url = "github:Platonic-Systems/process-compose-flake";
+  };
+  outputs = inputs@{ self, nixpkgs, flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = nixpkgs.lib.systems.flakeExposed;
+      imports = [
+        inputs.treefmt-nix.flakeModule
+      ];
+      perSystem = { pkgs, lib, config, ... }: {
+        treefmt = {
+          projectRoot = inputs.process-compose-flake;
+          projectRootFile = "flake.nix";
+          programs = {
+            nixpkgs-fmt.enable = true;
+          };
+        };
+        devShells.default = pkgs.mkShell {
+          inputsFrom = [
+            config.treefmt.build.devShell
+          ];
+        };
+      };
+    };
+}

flake.nix

@@ -15,6 +15,10 @@
         inherit overrideInputs;
         dir = "example";
       };
+      dev = {
+        inherit overrideInputs;
+        dir = "dev";
+      };
     };
   };
 }