discord: add a script to disable breaking updates (#197248)

pkgs/applications/networking/instant-messengers/discord/disable-breaking-updates.py

@@ -0,0 +1,42 @@
+#!@pythonInterpreter@
+# slightly tweaked from the script created by @lionirdeadman
+# https://github.com/flathub/com.discordapp.Discord/blob/master/disable-breaking-updates.py
+"""
+Disable breaking updates which will prompt users to download a deb or tar file
+and lock them out of Discord making the program unusable.
+
+This will dramatically improve the experience :
+
+ 1) The maintainer doesn't need to be worried at all times of an update which will break Discord.
+ 2) People will not be locked out of the program while the maintainer runs to update it.
+
+"""
+
+import json
+import os
+from pathlib import Path
+
+XDG_CONFIG_HOME = os.environ.get("XDG_CONFIG_HOME") or os.path.join(
+    os.path.expanduser("~"), ".config"
+)
+
+settings_path = Path(f"{XDG_CONFIG_HOME}/@configDirName@/settings.json")
+settings_path_temp = Path(f"{XDG_CONFIG_HOME}/@configDirName@/settings.json.tmp")
+try:
+    with settings_path.open(encoding="utf-8") as settings_file:
+        settings = json.load(settings_file)
+
+        if settings.get("SKIP_HOST_UPDATE"):
+            print("[Nix] Disabling updates already done")
+        else:
+            skip_host_update = {"SKIP_HOST_UPDATE": True}
+            settings.update(skip_host_update)
+
+            with settings_path_temp.open("w", encoding="utf-8") as settings_file_temp:
+                json.dump(settings, settings_file_temp, indent=2)
+
+            settings_path_temp.rename(settings_path)
+            print("[Nix] Disabled updates")
+
+except IOError:
+    print("[Nix] settings.json doesn't yet exist, can't disable it yet")

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

@@ -4,9 +4,22 @@
 , glib, gtk3, libcxx, libdrm, libnotify, libpulseaudio, libuuid, libX11
 , libXScrnSaver, libXcomposite, libXcursor, libXdamage, libXext, libXfixes
 , libXi, libXrandr, libXrender, libXtst, libxcb, libxshmfence, mesa, nspr, nss
-, pango, systemd, libappindicator-gtk3, libdbusmenu, writeScript
+, pango, systemd, libappindicator-gtk3, libdbusmenu, writeScript, python3, runCommand
 , common-updater-scripts, withOpenASAR ? false }:
 
+let
+  disableBreakingUpdates = runCommand "disable-breaking-updates.py"
+    {
+      pythonInterpreter = "${python3.interpreter}";
+      configDirName = lib.toLower binaryName;
+    } ''
+    mkdir -p $out/bin
+    cp ${./disable-breaking-updates.py} $out/bin/disable-breaking-updates.py
+    substituteAllInPlace $out/bin/disable-breaking-updates.py
+    chmod +x $out/bin/disable-breaking-updates.py
+  '';
+in
+
 stdenv.mkDerivation rec {
   inherit pname version src meta;
 
@@ -85,7 +98,8 @@ stdenv.mkDerivation rec {
         "''${gappsWrapperArgs[@]}" \
         --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}" \
         --prefix XDG_DATA_DIRS : "${gtk3}/share/gsettings-schemas/${gtk3.name}/" \
-        --prefix LD_LIBRARY_PATH : ${libPath}:$out/opt/${binaryName}
+        --prefix LD_LIBRARY_PATH : ${libPath}:$out/opt/${binaryName} \
+        --run "${lib.getExe disableBreakingUpdates}"
 
     ln -s $out/opt/${binaryName}/${binaryName} $out/bin/
     # Without || true the install would fail on case-insensitive filesystems
@@ -115,7 +129,10 @@ stdenv.mkDerivation rec {
     mimeTypes = [ "x-scheme-handler/discord" ];
   };
 
-  passthru.updateScript = writeScript "discord-update-script" ''
+  passthru = {
+    # make it possible to run disableBreakingUpdates standalone
+    inherit disableBreakingUpdates;
+    updateScript = writeScript "discord-update-script" ''
       #!/usr/bin/env nix-shell
       #!nix-shell -i bash -p curl gnugrep common-updater-scripts
       set -eou pipefail;
@@ -126,4 +143,5 @@ stdenv.mkDerivation rec {
       version=''${version%%/*.tar.gz}
       update-source-version ${pname} "$version" --file=./pkgs/applications/networking/instant-messengers/discord/default.nix
     '';
+  };
 }