dsview: 0.99 -> 1.12

Adapted the patches and took a commit from upstream master branch to
allow the migration to Qt5.15.

Had to copy the patch because of the custom sourceRoot.

pkgs/applications/science/electronics/dsview/default.nix

@@ -1,42 +1,46 @@
-{ stdenv, fetchFromGitHub, pkgconfig, cmake,
-libzip, boost, fftw, qtbase,
-libusb1, wrapQtAppsHook, libsigrok4dsl, libsigrokdecode4dsl
+{ lib, mkDerivation, fetchFromGitHub, pkgconfig, cmake
+, libzip, boost, fftw, qtbase, libusb1, libsigrok4dsl
+, libsigrokdecode4dsl, python3, fetchpatch
 }:
 
-stdenv.mkDerivation rec {
+mkDerivation rec {
   pname = "dsview";
 
-  version = "0.99";
+  version = "1.12";
 
   src = fetchFromGitHub {
       owner = "DreamSourceLab";
       repo = "DSView";
-      rev = version;
-      sha256 = "189i3baqgn8k3aypalayss0g489xi0an9hmvyggvxmgg1cvcwka2";
+      rev = "v${version}";
+      sha256 = "q7F4FuK/moKkouXTNPZDVon/W/ZmgtNHJka4MiTxA0U=";
   };
 
-  postUnpack = ''
-    export sourceRoot=$sourceRoot/DSView
-  '';
+  sourceRoot = "source/DSView";
 
   patches = [
     # Fix absolute install paths
     ./install.patch
+
+    # Fix buld with Qt5.15 already merged upstream for future release
+    # Using local file instead of content of commit #33e3d896a47 because
+    # sourceRoot make it unappliable
+    ./qt515.patch
   ];
 
-  nativeBuildInputs = [ cmake pkgconfig wrapQtAppsHook ];
+  nativeBuildInputs = [ cmake pkgconfig ];
 
   buildInputs = [
-   boost fftw qtbase libusb1 libzip libsigrokdecode4dsl libsigrok4dsl
+    boost fftw qtbase libusb1 libzip libsigrokdecode4dsl libsigrok4dsl
+    python3
   ];
 
   enableParallelBuilding = true;
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "A GUI program for supporting various instruments from DreamSourceLab, including logic analyzer, oscilloscope, etc";
     homepage = "https://www.dreamsourcelab.com/";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
-    maintainers = [ maintainers.bachp ];
+    maintainers = with maintainers; [ bachp ];
   };
 }