discord: add commandLineArgs

Adds an option to append arbitrary command-line arguments to the wrapper.

This allows fixing an issue with DPI scaling in Electron apps by passing
`--force-device-scale-factor=<scale>`, like for Chrome and VSCode.

pkgs/applications/networking/instant-messengers/discord/darwin.nix

@@ -19,6 +19,7 @@
   vencord,
   withMoonlight ? false,
   moonlight,
+  commandLineArgs ? "",
 }:
 
 assert lib.assertMsg (
@@ -64,7 +65,8 @@ stdenv.mkDerivation {
     # wrap executable to $out/bin
     mkdir -p $out/bin
     makeWrapper "$out/Applications/${desktopName}.app/Contents/MacOS/${binaryName}" "$out/bin/${binaryName}" \
-      --run ${lib.getExe disableBreakingUpdates}
+      --run ${lib.getExe disableBreakingUpdates} \
+      --add-flags ${lib.escapeShellArg commandLineArgs}
 
     runHook postInstall
   '';

pkgs/applications/networking/instant-messengers/discord/linux.nix

@@ -70,6 +70,7 @@
   # The intended use-case for this is when SKIP_HOST_UPDATE is enabled via other means,
   # for example if a settings.json is linked declaratively (e.g., with home-manager).
   disableUpdates ? true,
+  commandLineArgs ? "",
 }:
 assert lib.assertMsg (
   !(withMoonlight && withVencord)
@@ -184,7 +185,8 @@ stdenv.mkDerivation rec {
         ${lib.strings.optionalString enableAutoscroll "--add-flags \"--enable-blink-features=MiddleClickAutoscroll\""} \
         --prefix XDG_DATA_DIRS : "${gtk3}/share/gsettings-schemas/${gtk3.name}/" \
         --prefix LD_LIBRARY_PATH : ${libPath}:$out/opt/${binaryName} \
-        ${lib.strings.optionalString disableUpdates "--run ${lib.getExe disableBreakingUpdates}"}
+        ${lib.strings.optionalString disableUpdates "--run ${lib.getExe disableBreakingUpdates}"} \
+        --add-flags ${lib.escapeShellArg commandLineArgs}
 
     ln -s $out/opt/${binaryName}/${binaryName} $out/bin/
     # Without || true the install would fail on case-insensitive filesystems