[OE-core] devshell problems after distro upgrade openSUSE Leap 42.3 -> 15.0 (tmux only)

[Mike Crowe]

On Wednesday 21 November 2018 at 18:28:31 +0000, Mike Crowe wrote:
> On Tuesday 06 November 2018 at 19:06:45 +0000, Mike Crowe wrote:
> > On Monday 16 July 2018 at 08:19:11 +0200, Steffen Sledz wrote:
> > > On 04.07.2018 13:37, Steffen Sledz wrote:
> > > > On 03.07.2018 08:04, Steffen Sledz wrote:
> > > >> On 02.07.2018 20:25, Khem Raj wrote:
> > > >>> On Sun, Jul 1, 2018 at 11:39 PM Steffen Sledz <sledz at dresearch-fe.de> wrote:
> > > >>>>
> > > >>>> After upgrading my build system from openSUSE Leap 42.3 to openSUSE Leap 15.0 a
> > > >>>>
> > > >>>>   bitbake foo -c devshell
> > > >>>>
> > > >>>> no longer switches to the related work directory. The devshell is opened in the original directory without any error or warning instead.
> > > >>>>
> > > >>>> Any hints what's wrong here or how I can debug this behaviour?
> > > >>>>
> > > >>>
> > > >>> which terminal are you using, probably some default behavior changes there ?
> > > >>
> > > >> Main terminal is xterm. No special settings for the devshell terminal, so tmux is started like before.
> > > > 
> > > > 
> > > > After some more tests I can limit the problem to OE_TERMINAL="tmux". Other terminals like screen or xterm work well.
> > > > ...
> > > 
> > > 
> > > Ping!
> > 
> > The same problem happens with Debian Buster (currently "testing".) I was
> > unable to reproduce the problem when running
> >
> >  (cd subdirectory && tmux split-window)
> > 
> > from a shell prompt.

This was deemed a bug by tmux upstream and fixed there:

 https://github.com/tmux/tmux/issues/1549

I reported the bug to Debian, who applied the fix on top of 2.8:

 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914816

and the fixed version 2.8-2 has now migrated to Debian Buster:

 https://tracker.debian.org/news/1009699/tmux-28-2-migrated-to-testing/

It looks like Ubuntu Cosmic 18.10 has tmux 2.7-1, so it wasn't affected.
Ubuntu Disco (19.04?) currently has 2.8-2 which contains the fix.

It would be possible to work around the tmux 2.8 bug in oe-core by always
passing the directory as I did in my patch, but I shall let someone who is
affected by it decide whether that's worthwhile.

Mike.