fix: screen sharing for slack, element-desktop

flake.lock

@@ -143,6 +143,22 @@
         "type": "github"
       }
     },
+    "fork": {
+      "locked": {
+        "lastModified": 1712959986,
+        "narHash": "sha256-/4PhrnC+W5gWJAiRDf3tfLouxJc1UhSAnCpwKf1q1K4=",
+        "owner": "teutat3s",
+        "repo": "nixpkgs",
+        "rev": "2186dafc19798a5314d42c126b7520957e019cef",
+        "type": "github"
+      },
+      "original": {
+        "owner": "teutat3s",
+        "ref": "fix-element-desktop-screen-sharing-23.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -303,6 +319,7 @@
         "deploy-rs": "deploy-rs",
         "flake-compat": "flake-compat",
         "flake-parts": "flake-parts",
+        "fork": "fork",
         "home-manager": "home-manager",
         "master": "master",
         "nix-darwin": "nix-darwin",

flake.nix

@@ -10,7 +10,7 @@
     unstable.url = "github:nixos/nixpkgs/nixos-unstable";
     master.url = "github:nixos/nixpkgs/master";
 
-    #fork.url = "github:teutat3s/nixpkgs/backport-droidcam";
+    fork.url = "github:teutat3s/nixpkgs/fix-element-desktop-screen-sharing-23.11";
 
     flake-compat.url = "github:edolstra/flake-compat";
     flake-compat.flake = false;

overlays/default.nix

@@ -18,12 +18,16 @@
                 "slack"
               ];
             };
+            fork = import inputs.fork {
+              system = prev.system;
+            };
             master = import inputs.master {
               system = prev.system;
             };
           in
           {
             direnv = unstable.direnv;
+            element-desktop = fork.element-desktop;
             nixVersions = prev.nixVersions // {inherit (unstable.nixVersions) nix_2_20;};
             nix-direnv = unstable.nix-direnv;
             _1password = unstable._1password;
@@ -37,6 +41,7 @@
           (import ./mdbook-multilang.nix inputs)
           (import ./nix-index.nix)
           (import ./prr.nix)
+          (import ./slack.nix)
           (import ./neovim-plugins.nix)
         ];
       });

overlays/element-desktop.nix

@@ -0,0 +1,56 @@
+final: prev: {
+  element-desktop = prev.element-desktop.overrideAttrs (oldAttrs: rec {
+
+  installPhase =
+    let
+      libPath = prev.lib.makeLibraryPath [
+        prev.libnotify
+      ];
+  executableName = "element-desktop";
+  desktopItem = prev.makeDesktopItem {
+    name = "element-desktop";
+    exec = "${executableName} %u";
+    icon = "element";
+    desktopName = "Element";
+    genericName = "Matrix Client";
+    comment = oldAttrs.meta.description;
+    categories = [ "Network" "InstantMessaging" "Chat" ];
+    startupWMClass = "element";
+    mimeTypes = [ "x-scheme-handler/element" ];
+  };
+    in
+  ''
+    runHook preInstall
+
+    # resources
+    mkdir -p "$out/share/element"
+    ln -s '${prev.element-web}' "$out/share/element/webapp"
+    cp -r '.' "$out/share/element/electron"
+    cp -r './res/img' "$out/share/element"
+    rm -rf "$out/share/element/electron/node_modules"
+    cp -r './node_modules' "$out/share/element/electron"
+    cp $out/share/element/electron/lib/i18n/strings/en_EN.json $out/share/element/electron/lib/i18n/strings/en-us.json
+    ln -s $out/share/element/electron/lib/i18n/strings/en{-us,}.json
+
+    # icons
+    for icon in $out/share/element/electron/build/icons/*.png; do
+      mkdir -p "$out/share/icons/hicolor/$(basename $icon .png)/apps"
+      ln -s "$icon" "$out/share/icons/hicolor/$(basename $icon .png)/apps/element.png"
+    done
+
+    # desktop item
+    mkdir -p "$out/share"
+    ln -s "${desktopItem}/share/applications" "$out/share/applications"
+
+    # executable wrapper
+    # LD_PRELOAD workaround for sqlcipher not found: https://github.com/matrix-org/seshat/issues/102
+    makeWrapper '${prev.electron}/bin/electron' "$out/bin/element-desktop" \
+      --set LD_PRELOAD ${prev.sqlcipher}/lib/libsqlcipher.so \
+      --set LD_LIBRARY_PATH "${libPath}" \
+      --add-flags "$out/share/element/electron" \
+      --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WebRTCPipeWireCapturer,WaylandWindowDecorations}}"
+
+    runHook postInstall
+  '';
+  });
+}

overlays/slack.nix

@@ -0,0 +1,9 @@
+final: prev: {
+  # https://askubuntu.com/questions/1490447/slack-with-webrtcpipewirecapture-wyaland-black-screen-sharing-but-works-on-chrom
+  slack = prev.slack.overrideAttrs (oldAttrs: rec {
+
+    postInstall = ''
+      sed -i -e 's/,"WebRTCPipeWireCapturer"/,"LebRTCPipeWireCapturer"/' $out/lib/slack/resources/app.asar
+    '';
+  });
+}