Besides the original check (-n $WAYLAND_DISPLAY), do not use the bundled
libraries also when there are the libwayland* in system (so not needed).
This allows `uv -d sdl:driver=KMSDRM` even from console when
WAYLAND_DISPLAY is not defined but Wayland is run in a different session.
If the WAYLAND_DISPLAY is defined but the not all libwayland* are found
in the system, now the bundled version is used (changed- was not
previously).
Check if bundled libavcodec has all dependencies satisfied from system
libva, if not do not use the system ones.
Fixes the error message:
```
undefined symbol: vaMapBuffer2 (./squashfs-root/usr/lib/libavutil.so.59)
```
on (some) current Ubuntu 22.04 with current continuous AI.
If run from within the AppImage, -h shows help of the AppImage wrapper
itself, not the one of UltraGrid. So add --ug-help as an alternative for
`-o uv -h`.
First considered was a shortopt -H, but this is currently mapped by UG
for --full-help (which can be used directly), so keep the long variant
in order not to make it confusing.
In the current AppImages, the bundled libavcodec depends just on
libva.so.2 but libavutil depends on libva.so.2, libav-drm.so.2 and
libva-x11.so.2. Since the availability of any of libva-*.so was not
detected, even if those are not present (eg. in GRML 24.02 libva-x11.so.2
is missing), the system library was used.
As a solution, check the availability of all libav.* that is bundled
libavcodec and libavutil depending on.
if it happens that parent dir is /tmp, eg.:
`ug.AppImage -t testcard:file=/tmp/img.pam`
do not whitelist /tmp, otherwise following error occurs:
`Error: invalid whitelist path /tmp`
This respawns the process instead of the script. The advantage is that
when the AppImage process is killed, UG is killed as well, eg. in this
case:
```
UltraGrid-continuous-x86_64.AppImage -t testcard & (sleep 3; kill $!)
```
Otherwise just the parent process (the shell) is killed, leaving the child
(UG) running on background, which is undesirable. See also:
<https://stackoverflow.com/questions/8533377/why-child-process-still-alive-after-parent-process-was-killed-in-linux>
For the above command, `kill -SIGTERM -$!` would be required to do
the job, but the parent shell process keeps "running" in the background
and `bg` needs to be run.
It is not needed to split the string like this:
```
a="potentially long string on"\
"multiple lines"
```
but it is better rather to put the '\' inside the string:
```
a="potentially long string on\
multiple lines"
```
The caller can now provide its own FIREJAIL_OPTS (if something is
needed).
+ do not pass explicitly UG_FONT_DIR to firejail - the environment isn't
entirely pruned, the env vars usually pass to the Firejail, except of
some, including LD_PRELOAD, LD_LIBRARY_PATH and TMPDIR, which are
already passed.
- TMPDIR was not writtable - `--read-only=/tmp` after
`--read-write=/tmp/something` overrides read-write, order needs to be
reversed
- for args file, filename, make parent directory writtable - it may not
only be read, but also written (like `--protocol sdp:file=out.sdp`)
+ FIREJAIL_DEBUG to print assembled Firejail arguments
If $ULTRAGRID_AUTOUPDATE is set to >= 0, use it as update interval (in
days).
Since the value 0 was used to suppress the update warning, the value
to suppress the warning was required to change to -1.
The command-line tools used here (eg. stat) may use our custom libraries
(like libselinux) which may not be entirely compatible (it just most
likely ends up with a warning).
+ do the same for get_tools() and set_libva_ld_preload()
+ use original (if any) LD_LIBRARY_PATH for set_ld_preload()
+ removed unneeded `exit $?` (it is implicit)
libpipewire is incompatible with preloaded jack on current Arch and
causes a crash (unsatisfied jack pipewire function dependency).
Anyways, the pipewire screen capture didn't work with the bundled
library, anyways, so we certainly need one from system.
Setting LD_LIBRARY_PATH would override the library path also for tput
executable, leading to possible incompatible version of ncurses in
bundle, leading to following error:
tput: /tmp/.mount_UG-20-oJoJEf/usr/lib/libncursesw.so.6: version `NCURSES6_TINFO_6.2.20211010' not found (required by tput)
(and of course the color escape sequence is not returned)
Don't use bundled Wayland libraries when running on Wayland but use it
otherwise to satisfy possibly unsatisfied dependencies.
See also previous commit - Wayland libraries seem not to be portable and
prevent SDL2 native run on Wayland. After this change, SDL2 runs on
U22.04 in Weston (without Xwayland).
Beware not to add --whitelist=/tmp[something] because that would hide
the actual mounted image (/tmp/.mount_ultragridsomething). As /tmp is
remounted RO, just make the "whitelisted" dirs RW.
+ add to whitelist $DIR (path to executable) if it is not /tmp (eg.
extracted AppImage somewhere)
Do not interfere with UltraGrid -m parameter -- show man if only 1-2
parameters given (`uv -m 1500` doesn't make much sense for UG),
otherwise pass it to UltraGrid.
This allows using commands like `UltraGrid-continuous-x86_64.AppImage -m
1316 -t testcard -d gl` (`-m` MTU parameter at the first place).
