pythonPath is used to create the eventual wrappers. It does not recurse
into the Python dependencies, which means e.g. requests doesn't haven
its dependencies.
Wrap s-c-p with CUPS_DATADIR=${cups-filters}/share/cups so that it finds
the "testprint" file needed for "Print Test Page" functionality.
Without this change, s-c-p tries to open /usr/share/cups/data/testprint
(fails).
See #11567.
Furthermore, it renames pythonPackages.dbus to pythonPackages.dbus-
python as that's the name upstream uses.
There is a small rebuild but I couldn't figure out the actual cause.
Commit 03353ce6ff738acce3d ("system-config-printer: 1.3.12 -> 1 5.7")
forgot to update the hash. So since that commit we actually continued to
use the old version (1.3.12) because of the NixOS tarball cache...
The new version prints some warnings on startup:
/nix/store/HASH-system-config-printer-1.5.7/share/system-config-printer/system-config-printer.py:32: \
PyGIWarning: Polkit was imported without specifying a version first. \
Use gi.require_version('Polkit', '1.0') before import to ensure that the right version gets loaded.
from gi.repository import Polkit
...and similar errors for GdkPixbuf, Gdk, Gtk and Notify. These warnings
are already fixed upstream and will be part of the next release.
Implementation details:
* The new version needs python3.
* Remove unneeded, and python3 incompatible, 'notify' dependency.
system-config-printer > 1.3.12 replaced it with GOBject introspection
bindings to libnotify (from gi.repository import Notify).
* Add gtk3, gdk_pixbuf, pango, atk, libnotify as needed (for gobject
introspection).
* A new --with-udevdir configure option is used to prevent the
installer from trying to install stuff to "/rules.d" (yes, the root).
* Get pycups from the passed pythonPackages set (fixes loading of
python cups module).
* Use pygobject3 instead of pygobject, as needed.
* Use dbus from the passed pythonPackages attrset instead of
pythonDBus, so we get a python3 compatible module that loads
successfully.
* Python requests2 modules is required.
The service file refers to /usr/bin/... instead of a Nix store path.
Fix it.
The original fix was wrongly removed in commit 03353ce6ff738acce3d
("system-config-printer: 1.3.12 -> 1 5.7"). We can remove this fixup on
the _next_ upstream release.
The latest version of system-config-printer seems to have introduced a
dependency on pycurl. The attached patch includes this, fixing the build of
kde, which depended on it through kdeadmin.
