bug#33325: xpra doesn't work out-of-the-box (implicit dependencies)

[ludovic.courtes@inria.fr (Ludovic Courtès)]

Hello Rutger and all,

Our Xpra package seems to not be usable directly without installing
additional items:

--8<---------------cut here---------------start------------->8---
$ guix environment --ad-hoc xpra --pure -- xpra start :100
Warning: Xorg binary not found, assuming the wrapper is needed!
Entering daemon mode; any further errors will be reported to:
  /run/user/1000/xpra/:100.log
$ cat /run/user/1000/xpra/:100.log
2018-11-09 14:37:42,986 Error: cannot enable SSH socket upgrades:
2018-11-09 14:37:42,986  No module named paramiko
2018-11-09 14:37:42,987 cannot access python uinput module:
2018-11-09 14:37:42,987  No module named uinput
2018-11-09 14:37:42,995 Error adding xauth entry for :100
2018-11-09 14:37:42,995  using command "xauth -f /home/ludo/.Xauthority add :100 MIT-MAGIC-COOKIE-1 7c2c66d9295545cfb1c27b1109b4b54e":
[mi] Extension "Composite" is not recognized
2018-11-09 14:37:42,995  [Errno 2] No such file or directory
[mi] Only the following extensions can be run-time enabled:
[mi]    Generic Event Extension
[mi]    MIT-SHM
[mi]    XTEST
[mi]    XINERAMA
[mi]    XFIXES
[mi]    RENDER
[mi]    RANDR
[mi]    COMPOSITE
[mi]    DAMAGE
[mi]    MIT-SCREEN-SAVER
[mi]    DOUBLE-BUFFER
[mi]    RECORD
[mi]    DPMS
[mi]    X-Resource
[mi]    XVideo
[mi]    XVideo-MotionCompensation
[mi]    GLX
No protocol specified
No protocol specified
No protocol specified
No protocol specified
No protocol specified
No protocol specified
No protocol specified
No protocol specified
No protocol specified
No protocol specified
--8<---------------cut here---------------end--------------->8---

On a foreign distro I see we’re also lacking a reference to
‘dbus-launch’:

--8<---------------cut here---------------start------------->8---
[courtes@devel13 ~]$ guix environment --ad-hoc xpra --pure -- xpra start :100
Warning: Xorg binary not found, assuming the wrapper is needed!
Entering daemon mode; any further errors will be reported to:
  /run/user/10218/xpra/:100.log
[courtes@devel13 ~]$ cat /run/user/10218/xpra/:100.log
2018-11-09 15:10:06,064 Error: cannot enable SSH socket upgrades:
2018-11-09 15:10:06,064  No module named paramiko
2018-11-09 15:10:06,066 cannot access python uinput module:
2018-11-09 15:10:06,066  No module named uinput
2018-11-09 15:10:06,079 Error adding xauth entry for :100
2018-11-09 15:10:06,080  using command "xauth -f /home/courtes/.Xauthority add :100 MIT-MAGIC-COOKIE-1 9519cb23f6a348eda7f068d9317a664c":
2018-11-09 15:10:06,080  [Errno 2] No such file or directory
[mi] Extension "Composite" is not recognized
[mi] Only the following extensions can be run-time enabled:
[mi]    Generic Event Extension
[mi]    MIT-SHM
[mi]    XTEST
[mi]    XINERAMA
[mi]    XFIXES
[mi]    RENDER
[mi]    RANDR
[mi]    COMPOSITE
[mi]    DAMAGE
[mi]    MIT-SCREEN-SAVER
[mi]    DOUBLE-BUFFER
[mi]    RECORD
[mi]    DPMS
[mi]    X-Resource
[mi]    XVideo
[mi]    XVideo-MotionCompensation
[mi]    GLX
2018-11-09 15:10:06,472 Warning: some of the sockets are in an unknown state:
2018-11-09 15:10:06,473  /home/courtes/.xpra/devel13-100
2018-11-09 15:10:06,473  please wait as we allow the socket probing to timeout
2018-11-09 15:10:12,502 created unix domain socket: /home/courtes/.xpra/devel13-100
/gnu/store/rbrandv7anzjxqkr40d7fkanzssslk4b-bash-minimal-4.4.19/bin/sh: dbus-launch: command not found
dbus-launch failed to start using command 'dbus-launch --close-stderr':

 exit code is 127

--8<---------------cut here---------------end--------------->8---

Thoughts?

Thanks in advance,
Ludo’.