Signal doesn't launch after apllying themes

[ectacte]

signal doesnt start after putting @import "catppuccin-.css" in manifest.css nor does it launch when using theme-injector.
Had to reinstall both times

[undefinedcode0]

Have you found any fix? This is also happening to me

[ectacte]

unfortunately no, didnt have much time recently to look into it will most likely give it another try or smth if i fix ill let you know

[TheSunCat]

I did some debugging and found that (at least on NixOS) Signal is failing to find libpulse.so.0 which is preventing it from launching. Setting LD_LIBRARY_PATH allows it to find it, and it opens the window which shows the Signal loading animation infinitely.
Further checking the JavaScript console (using --enable-dev-tools), I found it fails to load libstdc++.so. Adding a path to this lib in LD_LIBRARY_PATH finally allows Signal to launch normally and have the theme applied.

This is a rather dirty workaround, but as I am not familiar with how Electron works I am not sure I can do more. I will do some more research and write what I find here.

[TheSunCat]

Got it, by reading the Nix package here: https://github.com/NixOS/nixpkgs/blob/db8414903dd6b3042e1ac471eafc18ca4ccb54a4/pkgs/by-name/si/signal-desktop/generic.nix#L246-L249

Apparently Signal does not "pack" their .node directory. Adding --unpack '*.node' to the pack command allows it to start up fine for me. See commit: https://git.allpurposem.at/mat/Computer/commit/d0d31a75e85fb1758ba43e74aeeb69da109630fc

[Intiiii]

any way to fix this on windows?

[FunkeymonkeyTTR]

Signal doesn't launch for me at all on windows after editing the manifest.css, even after I reverse the edit, it needs a full reinstall to function again.

[sciloop]

What a waste of time! Could you please eliminate the windows option until that works again?!

[hoodrichpirobo]

same happened for me

[sofiedotcafe]

Got it, by reading the Nix package here: https://github.com/NixOS/nixpkgs/blob/db8414903dd6b3042e1ac471eafc18ca4ccb54a4/pkgs/by-name/si/signal-desktop/generic.nix#L246-L249

Apparently Signal does not "pack" their .node directory. Adding --unpack '*.node' to the pack command allows it to start up fine for me. See commit: https://git.allpurposem.at/mat/Computer/commit/d0d31a75e85fb1758ba43e74aeeb69da109630fc

On Nix, you may also just skip the asar junk and do this, because you are in control of the build toolchain.

signal-desktop =
  (lib.makeOverridable (
    {
      theme ? null,
    }:
    signal-desktop.overrideAttrs (prev: {
      postPatch =
        (prev.postPatch or "")
        + (lib.throwIf (theme == null || builtins.typeOf theme != "string")
          "signal-desktop: theme must be null or a string for a path (got ${builtins.typeOf theme})"
          (
            lib.optionalString (theme != null) ''
              sed -i '1i @use "${theme}" as *;' stylesheets/manifest.scss
            ''
          )
        );
    })
  ))
    { };

I added the lib.makeOverridable so I can do something like this:

(signal-desktop.override { theme = "${pkgs.catppuccin-signal.override { variant = "mocha"; }}"; })

The package for catppuccin-signal is as follows:

{
  fetchFromGitHub,
  writeText,
  variant ? "mocha",
}:

let
  src = fetchFromGitHub {
    owner = "CalfMoon";
    repo = "signal-desktop";
    rev = "main";
    hash = "sha256-dWT3hG2uGhwpNgGHjwVmzci68upUVe5ktoeaPrNZ3q8=";
  };
in
writeText "catppuccin-signal.css" (builtins.readFile (src + "/themes/catppuccin-${variant}.css"))