feat: add collecting nix derivation from source

.gitignore

@@ -1,3 +1,5 @@
 /.ruff_cache
 __pycache__
 /third-party
+/.direnv
+/.envrc

collect-sources.nix

@@ -0,0 +1,62 @@
+{ rootDerivation
+, derivationName
+, stdenv
+, ... # added for future backwards compatibility
+}:
+let
+	config = builtins.fromJSON (builtins.readFile "${rootDerivation}/.git-third-party/config.json");
+	allRepoNames = builtins.attrNames config.repos;
+	makeDependentDerivation =
+		name:
+			let
+				cleanName = builtins.head (builtins.tail (builtins.match "^(.*/|)([^/]+)$" name));
+				myConfig = config.repos."${name}";
+				shouldFetchModules = !(builtins.hasAttr "submodules" myConfig) || myConfig.submodules != [];
+				base-src = builtins.fetchGit {
+					url = myConfig.url;
+					rev = myConfig.commit;
+					submodules = shouldFetchModules;
+					#fetchSubmodules = shouldFetchModules;
+					# fetchLFS = true;
+					shallow = true;
+				};
+		in stdenv.mkDerivation {
+			name = "git3party_${derivationName}_${cleanName}";
+			src = base-src;
+			patches =
+				builtins.map
+					(num: "${rootDerivation}/.git-third-party/patches/${name}/${toString num}")
+					(builtins.genList (x: x + 1) myConfig.patches);
+			phases = [ "unpackPhase" "patchPhase" "installPhase" ];
+
+			#outputHashMode = "recursive";
+
+			installPhase = ''
+				cp -r . "$out"
+			'';
+		};
+	dependentDerivations = builtins.map (name: { name = name; der = makeDependentDerivation name; }) allRepoNames;
+
+	cpFlags = "--no-preserve=ownership,mode --preserve=xattr";
+
+	copyLines = builtins.concatStringsSep "\n" ([
+		"cp ${cpFlags} -r '${rootDerivation}/.' ."
+	] ++ builtins.map (nameDer: "mkdir -p '${nameDer.name}'\ncp ${cpFlags} -r '${nameDer.der}'/. '${nameDer.name}'") dependentDerivations);
+in
+	stdenv.mkDerivation {
+		name = derivationName;
+
+		srcs = [
+			rootDerivation
+		] ++ (builtins.map (x: x.name) dependentDerivations);
+
+		phases = [ "unpackPhase" "installPhase" ];
+
+		#outputHashMode = "recursive";
+
+		unpackPhase = copyLines;
+
+		installPhase = ''
+			cp -r . "$out"
+		'';
+	}

flake.lock

@@ -0,0 +1,64 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": [
+          "systems"
+        ]
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1744440957,
+        "narHash": "sha256-FHlSkNqFmPxPJvy+6fNLaNeWnF1lZSgqVCl/eWaJRc4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "26d499fc9f1d567283d5d56fcf367edd815dba1d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "systems": "systems"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,33 @@
+{
+	inputs = {
+		nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+		systems = {
+			url = "github:nix-systems/default";
+			inputs.nixpkgs.follows = "nixpkgs";
+		};
+		flake-utils = {
+			url = "github:numtide/flake-utils";
+			inputs.systems.follows = "systems";
+			inputs.nixpkgs.follows = "nixpkgs";
+		};
+	};
+
+	outputs = inputs@{ self, nixpkgs, flake-utils, ... }:
+		flake-utils.lib.eachDefaultSystem
+			(system:
+				let
+					pkgs = nixpkgs.legacyPackages.${system};
+				in
+				{
+					devShells.default = pkgs.mkShell {
+						packages = with pkgs; [
+							python312
+							pre-commit
+						];
+
+						shellHook = ''
+						'';
+					};
+				}
+			);
+}