Integrated driver/PPD auto-download completely into system-config-pri…

…nter

Due to the third-party (manufacturer) driver manager Jockey being the
discontinued in Ubuntu, the driver download mechanism for downloading
drivers linked by OpenPrinting is now completely integrated in
system-config-printer, re-using as much as possible of the already
existing functionality of downloading single PPD files via
OpenPrinting.

The functionality can be configured to match the policies of Linux
distributions via the following constants in newprinter.py:

    DOWNLOADABLE_ONLYPPD=True
    DOWNLOADABLE_ONLYFREE=True
    DOWNLOADABLE_PKG_ONLYSIGNED=True

The Jockey support in ppdsloader.py is not removed, so that users of
ppdsloader.py who do not use newprinter.py can still use Jockey (e. g.
KDE/Qt-based Kubuntu).

Makefile.am

@@ -88,6 +88,7 @@ nobase_pkgdata_SCRIPTS=				\
 	pysmb.py				\
 	scp-dbus-service.py			\
 	system-config-printer.py		\
+	install-printerdriver.py		\
 	troubleshoot/__init__.py		\
 	applet.py
 
@@ -175,6 +176,7 @@ cupshelpers_DATA=\
 
 bin_SCRIPTS=					\
 	system-config-printer			\
+	install-printerdriver			\
 	system-config-printer-applet		\
 	dbus/scp-dbus-service
 

configure.in

@@ -71,6 +71,7 @@ Makefile
 po/Makefile.in
 system-config-printer
 system-config-printer-applet
+install-printerdriver
 dbus/scp-dbus-service
 ])
 AC_OUTPUT

cupshelpers/ppds.py

@@ -499,7 +499,7 @@ def orderPPDNamesByPreference (self, ppdnamelist=[],
             for ppdname in ppdnamelist:
                 (path, slash, ppdfname) = ppdname.rpartition ("/")
                 if ppdfname in downloadedfnames:
-                    downloadedppdnames.add (ppdname)
+                    downloadedppdnames.append (ppdname)
 
             # Finally, promote the matching ones to the head of the list.
             if downloadedppdnames:

install-printerdriver.in

@@ -0,0 +1,3 @@
+#!/bin/sh
+prefix=@prefix@
+exec @datarootdir@/@PACKAGE@/install-printerdriver.py "$@"

install-printerdriver.py

@@ -0,0 +1,92 @@
+#!/usr/bin/python
+
+from gi.repository import GLib, PackageKitGlib
+import sys
+
+# progress callback
+# http://www.packagekit.org/gtk-doc/PkProgress.html
+def progress(progress, type, user_data):
+    if (type.value_name == "PK_PROGRESS_TYPE_PERCENTAGE" and
+        progress.props.package != None):
+        sys.stderr.write ("%d\n" % progress.props.percentage)
+        sys.stderr.flush ()
+
+package = sys.argv[1]
+repo = sys.argv[2]
+try:
+    repo_gpg_id = sys.argv[3]
+except:
+    repo_gpg_id = None
+
+# get PackageKit client
+pk = PackageKitGlib.Client()
+
+# check if we already have the package installed or available
+try:
+    res = pk.resolve(PackageKitGlib.FilterEnum.NONE, [package],
+                     None, lambda p, t, d: True, None)
+except GLib.GError:
+    # cannot resolve, so we need to install the key and repo
+    # install repository key
+    if repo_gpg_id:
+        try:
+            res = pk.install_signature(PackageKitGlib.SigTypeEnum.GPG, repo_gpg_id,
+                                       '', None, progress, None)
+        except GLib.GError:
+            sys.exit(1)
+        if res.get_exit_code() != PackageKitGlib.ExitEnum.SUCCESS:
+            sys.exit(1)
+
+    # add repository; see
+    # http://www.packagekit.org/gtk-doc/PackageKit-pk-client-sync.html#pk-client-repo-enable
+    try:
+        res = pk.repo_enable(repo, True, None, progress, None)
+    except GLib.GError:
+        sys.exit(1)
+    if res.get_exit_code() != PackageKitGlib.ExitEnum.SUCCESS:
+        sys.exit(1)
+
+    # download/update the indexes
+    try:
+        res = pk.refresh_cache(False, None, progress, None)
+    except GLib.GError:
+        sys.exit(1)
+    if res.get_exit_code() != PackageKitGlib.ExitEnum.SUCCESS:
+        sys.exit(1)
+
+# map package name to PackageKit ID; do not print progress here, it's fast
+try:
+    res = pk.resolve(PackageKitGlib.FilterEnum.NONE, [package],
+                     None, lambda p, t, d: True, None)
+except GLib.GError:
+    sys.exit(1)
+if res.get_exit_code() != PackageKitGlib.ExitEnum.SUCCESS:
+    sys.exit(1)
+package_ids = res.get_package_array()
+if len(package_ids) <= 0:
+    sys.exit(1)
+package_id = package_ids[0].get_id()
+
+# install the first match, unless already installed
+if package_ids[0].get_info() & PackageKitGlib.InfoEnum.INSTALLED == 0:
+    # install package
+    try:
+        res = pk.install_packages(True, [package_id], None, progress, None)
+    except GLib.GError:
+        sys.exit(1)
+    if res.get_exit_code() != PackageKitGlib.ExitEnum.SUCCESS:
+        sys.exit(1)
+
+# If we reach this point, the requested package is on the system, either
+# because we have installed it now or because it was already there
+
+# Return the list of files contained in the package
+try:
+    res = pk.get_files([package_id], None, progress, None)
+except GLib.GError:
+    pass
+
+files = res.get_files_array()
+if files:
+    for f in files[0].get_property('files'):
+        print f