bug#32981: dconf needs to be in environment for ibus-setup to work

[Nguyễn Gia Phong]

On 2018-10-07 at 21:25:36-0500, Caleb Ristvedt wrote:
> On installing ibus and ibus-libpinyin and ensuring
> the appropriate environment variables were applied,
> I attempted to run ibus-setup.  I went to the "Input Method" section
> and added the "Chinese - Intelligent Pinyin" method.  At that point
> ibus-setup output this message:
>
> dconf-WARNING **: failed to commit changes to dconf: 
> GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name 
> ca.desrt.dconf was not provided by any .service files
>
> Restarting ibus-setup showed that the changes had not stuck
> (if they ever were even applied). The problem persisted
> until I installed dconf into my profile, at which point it worked
> as expected.

I can still reproduce this issue and workaround.

On 2018-10-07 at 21:25:36-0500, Caleb Ristvedt wrote:
> It seems Nix has encountered this problem as well:
> 
> https://github.com/NixOS/nixpkgs/pull/11108
> 
> I believe this would be fixed by changing dconf from a regular input
> to a propagated-input of ibus.  Note that ibus-setup needs to be run
> in order to add *any* input method, including, say, English.

Should ibus-setup be patched accordingly?