[alternatives] Add ubuntu section

Related: #3224
Signed-off-by: Arif Ali <arif.ali@canonical.com>

sos/report/plugins/alternatives.py

@@ -8,25 +8,17 @@
 #
 # See the LICENSE file in the source distribution for further information.
 
-from sos.report.plugins import Plugin, RedHatPlugin
+from sos.report.plugins import Plugin, RedHatPlugin, UbuntuPlugin
 
 
-class Alternatives(Plugin, RedHatPlugin):
+class Alternatives(Plugin):
 
     short_desc = 'System alternatives'
     plugin_name = 'alternatives'
-    packages = ('chkconfig',)
-    commands = ('alternatives',)
 
     def setup(self):
 
-        self.add_cmd_tags({
-            "alternatives --display java.*": 'display_java',
-            "alternatives --display python.*":
-                'alternatives_display_python'
-        })
-
-        self.add_cmd_output('alternatives --version')
+        self.add_cmd_output('%s --version' % self.alternatives_cmd)
 
         alts = []
         ignore = [
@@ -37,13 +29,55 @@ def setup(self):
             'xinputrc'
         ]
 
-        res = self.collect_cmd_output('alternatives --list')
+        res = self.collect_cmd_output(self.alternatives_list)
         if res['status'] == 0:
             for line in res['output'].splitlines():
                 alt = line.split()[0]
                 if alt not in ignore:
                     alts.append(alt)
-            disp_cmd = "alternatives --display %s"
+            disp_cmd = "%s --display %s" % (self.alternatives_cmd, "%s")
             self.add_cmd_output([disp_cmd % alt for alt in alts])
 
+
+class RedHatAlternatives(Alternatives, RedHatPlugin):
+
+    packages = ('alternatives',)
+    commands = ('alternatives',)
+
+    alternatives_cmd = 'alternatives'
+    alternatives_list = '%s --list' % alternatives_cmd
+
+    def setup(self):
+
+        super(RedHatAlternatives, self).setup()
+
+        self.add_cmd_tags({
+            "alternatives --display java.*": 'display_java',
+            "alternatives --display python.*":
+                'alternatives_display_python'
+        })
+
+
+class UbuntuAlternatives(Alternatives, UbuntuPlugin):
+
+    packages = ('dpkg',)
+    commands = ('update-alternatives',)
+
+    alternatives_cmd = 'update-alternatives'
+    alternatives_list = '%s --get-selections' % alternatives_cmd
+
+    def setup(self):
+
+        super(UbuntuAlternatives, self).setup()
+
+        if self.get_option("all_logs"):
+            self.add_copy_spec([
+                "/var/log/alternatives.log*",
+            ])
+        else:
+            self.add_copy_spec([
+                "/var/log/alternatives.log",
+                "/var/log/alternatives.log.1",
+            ])
+
 # vim: set et ts=4 sw=4 :