This fixes the “bwrap: Can't mkdir parents for /var/run/user/1000/.dbus-proxy/: No such file or directory” error. This error occurs on systems where the path in the XDG_RUNTIME_DIR variable contains a symlink under var, for example /var/run → /run.
The reason for the error is that bubblewrap was called both with “--bind /var /var” and “--bind /var/run/user/1000/.dbus-proxy/ /var/run/user/1000/.dbus-proxy/”. This leads to the destination path already existing but with “/var/run” being a symlink. Bubblewrap then tries to make sure the mount point is present in the sandbox and creates all the dirs with its parents, which fails for “/var/run/user” because its parent is a symlink.
This fix simply resolves the path used for the runtime dir before it adds it to the bind parameter.
Closes: #2137
Approved by: alexlarsson
c102bd2b50