nix: Wrap FetchContent

.gitignore

@@ -50,3 +50,4 @@ latex/
 
 .cache/
 .gitattributes
+/result

flake.nix

@@ -10,6 +10,12 @@
 			pkgs = nixpkgs.legacyPackages.${system};
 			stdenvs = [ { name = "gcc"; pkg = pkgs.gcc13Stdenv; } { name = "clang"; pkg = pkgs.llvmPackages_16.stdenv; } ];
 			defaultStdenv = (builtins.head stdenvs).name;
+			quartz = pkgs.fetchFromGitHub {
+				owner = "vimpostor";
+				repo = "quartz";
+				rev = builtins.head (builtins.match ".*FetchContent_Declare\\(.*GIT_TAG ([[:alnum:]\\.]+).*" (builtins.readFile ./CMakeLists.txt));
+				hash = "sha256-KSuwXPUMZKx8nm8XnXHvj07GQtJAAnfIkRM6vbYllT0=";
+			};
 			makeStdenvPkg = env: env.mkDerivation {
 				pname = "blobdrop";
 				version = builtins.head (builtins.match ".*project\\([[:alnum:]]+ VERSION ([0-9]+\.[0-9]+).*" (builtins.readFile ./CMakeLists.txt));
@@ -18,17 +24,19 @@
 
 				nativeBuildInputs = with pkgs; [
 					cmake
+					git
 					pkg-config
 					qt6.wrapQtAppsHook
 				];
-
 				buildInputs = with pkgs; [
 					qt6.qtbase
 					qt6.qtdeclarative
 					qt6.qtsvg
 					xorg.libxcb
 					xorg.xcbutilwm
 				];
+
+				cmakeFlags = [("-DFETCHCONTENT_SOURCE_DIR_QUARTZ=" + quartz)];
 			};
 		in {
 			packages = rec {
@@ -38,7 +46,7 @@
 				format = pkgs.runCommand "format" { src = ./.; nativeBuildInputs = [ pkgs.clang-tools pkgs.git ]; } "mkdir $out && cd $src && find . -type f -path './*\\.[hc]pp' -exec clang-format -style=file --dry-run --Werror {} \\;";
 				tests = (makeStdenvPkg pkgs.gcc13Stdenv).overrideAttrs (finalAttrs: previousAttrs: {
 					doCheck = true;
-					cmakeFlags = ["-DBUILD_TESTING=ON"];
+					cmakeFlags = previousAttrs.cmakeFlags ++ ["-DBUILD_TESTING=ON"];
 					QT_QPA_PLATFORM = "offscreen";
 				});
 			};