gdbgui: modernize and migrate to pyproject (#526789)

pkgs/development/tools/misc/gdbgui/default.nix

@@ -5,15 +5,29 @@
   gdb,
 }:
 
-python3Packages.buildPythonApplication rec {
+python3Packages.buildPythonApplication (finalAttrs: {
   pname = "gdbgui";
-
   version = "0.15.3.0";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
+
+  src = fetchPypi {
+    inherit (finalAttrs) pname version;
+    hash = "sha256-/HyFE0JnoN03CDyCQCo/Y9RyH4YOMoeB7khReIb8t7Y=";
+  };
+
+  postPatch = ''
+    echo ${finalAttrs.version} > gdbgui/VERSION.txt
+    # relax version requirements
+    sed -i 's/==.*$//' requirements.txt
+  '';
+
+  build-system = with python3Packages; [ setuptools ];
 
   buildInputs = [ gdb ];
 
-  propagatedBuildInputs = with python3Packages; [
+  dependencies = with python3Packages; [
     eventlet
     flask-compress
     flask-socketio
@@ -21,17 +35,6 @@ python3Packages.buildPythonApplication rec {
     pygments
   ];
 
-  src = fetchPypi {
-    inherit pname version;
-    hash = "sha256-/HyFE0JnoN03CDyCQCo/Y9RyH4YOMoeB7khReIb8t7Y=";
-  };
-
-  postPatch = ''
-    echo ${version} > gdbgui/VERSION.txt
-    # relax version requirements
-    sed -i 's/==.*$//' requirements.txt
-  '';
-
   postInstall = ''
     wrapProgram $out/bin/gdbgui \
       --prefix PATH : ${lib.makeBinPath [ gdb ]}
@@ -51,4 +54,4 @@ python3Packages.buildPythonApplication rec {
       dump_stack
     ];
   };
-}
+})