From fae468b3ce1a758da727796db18dbaca417d1a50 Mon Sep 17 00:00:00 2001
From: James Ravn <james@r-vn.org>
Date: Fri, 5 Jun 2020 20:52:41 +0100
Subject: [PATCH 1/2] chromium: add rtc_use_pipewire

This provides the browser flag #enable-webrtc-pipewire-capturer, which
adds support for screensharing on Wayland via xdg-desktop-portal.

The browser flag is disabled by default until a user enables it. At
least one other major distribution (Arch) enables this compile time
option, and so I believe it should be safe to enable by default.

This is also needed to support xdg-desktop-portal-wlr which was added in
https://github.com/NixOS/nixpkgs/pull/83485.
---
 pkgs/applications/networking/browsers/chromium/common.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/applications/networking/browsers/chromium/common.nix b/pkgs/applications/networking/browsers/chromium/common.nix
index 8ce7c89bf780..33f859976f20 100644
--- a/pkgs/applications/networking/browsers/chromium/common.nix
+++ b/pkgs/applications/networking/browsers/chromium/common.nix
@@ -17,6 +17,7 @@
 , protobuf, speechd, libXdamage, cups
 , ffmpeg, libxslt, libxml2, at-spi2-core
 , jre
+, pipewire_0_2
 
 # optional dependencies
 , libgcrypt ? null # gnomeSupport || cupsSupport
@@ -132,6 +133,7 @@ let
       libXScrnSaver libXcursor libXtst libGLU libGL
       pciutils protobuf speechd libXdamage at-spi2-core
       jre
+      pipewire_0_2
     ] ++ optional useVaapi libva
       ++ optional gnomeKeyringSupport libgnome-keyring3
       ++ optionals gnomeSupport [ gnome.GConf libgcrypt ]
@@ -243,6 +245,8 @@ let
       # added later in the wrapped -wv build or downloaded from Google.
       enable_widevine = true;
       use_cups = cupsSupport;
+      # Provides the enable-webrtc-pipewire-capturer flag to support Wayland screen capture.
+      rtc_use_pipewire = true;
 
       treat_warnings_as_errors = false;
       is_clang = stdenv.cc.isClang;

From 1535270d91e82af7927c0f121f3f5605a0a7b248 Mon Sep 17 00:00:00 2001
From: James Ravn <james@r-vn.org>
Date: Sat, 6 Jun 2020 17:08:39 +0100
Subject: [PATCH 2/2] Add pipewire to runtime path

---
 pkgs/applications/networking/browsers/chromium/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/applications/networking/browsers/chromium/default.nix b/pkgs/applications/networking/browsers/chromium/default.nix
index df1dcb413e15..6f1380a42a05 100644
--- a/pkgs/applications/networking/browsers/chromium/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/default.nix
@@ -2,6 +2,7 @@
 , makeWrapper, ed
 , glib, gtk3, gnome3, gsettings-desktop-schemas, gn, fetchgit
 , libva ? null
+, pipewire_0_2
 , gcc, nspr, nss, patchelfUnstable, runCommand
 , lib
 
@@ -152,7 +153,7 @@ in stdenv.mkDerivation {
   buildCommand = let
     browserBinary = "${chromiumWV}/libexec/chromium/chromium";
     getWrapperFlags = plugin: "$(< \"${plugin}/nix-support/wrapper-flags\")";
-    libPath = stdenv.lib.makeLibraryPath [ libva ];
+    libPath = stdenv.lib.makeLibraryPath [ libva pipewire_0_2 ];
 
   in with stdenv.lib; ''
     mkdir -p "$out/bin"