tools/qvm-ls: allow list only selected VMs

Restore possibility to list only some VMs, by naming them on command
line.

qubesadmin/tests/tools/qvm_ls.py

@@ -98,6 +98,21 @@ class TC_50_List(qubesadmin.tests.QubesTestCase):
             'dom0     -          TestVM\n'
             'test-vm  pv         TestVM\n')
 
+    def test_102_list_selected(self):
+        app = TestApp()
+        app.domains['test-vm'].internal = False
+        app.domains['test-vm'].updateable = False
+        app.domains['test-vm'].template = TestVM('template')
+        app.domains['test-vm'].netvm = TestVM('sys-net')
+        app.domains['test-vm'].label = 'green'
+        app.domains['dom0'].label = 'black'
+        with qubesadmin.tests.tools.StdoutBuffer() as stdout:
+            qubesadmin.tools.qvm_ls.main(['test-vm'], app=app)
+        self.assertEqual(stdout.getvalue(),
+            'NAME     STATE    CLASS   LABEL  TEMPLATE  NETVM\n'
+            'test-vm  Running  TestVM  green  template  sys-net\n')
+
+
 class TC_90_List_with_qubesd_calls(qubesadmin.tests.QubesTestCase):
     def test_100_list_with_status(self):
         self.app.expected_calls[
@@ -150,3 +165,41 @@ class TC_90_List_with_qubesd_calls(qubesadmin.tests.QubesTestCase):
             'template1  Halted   TemplateVM  black  -          sys-net\n'
             'vm1        Running  AppVM       green  template1  sys-net\n')
         self.assertAllCalled()
+
+    def test_101_list_selected(self):
+        self.app.expected_calls[
+            ('dom0', 'admin.vm.List', None, None)] = \
+            b'0\x00vm1 class=AppVM state=Running\n' \
+            b'template1 class=TemplateVM state=Halted\n' \
+            b'sys-net class=AppVM state=Running\n'
+        self.app.expected_calls[
+            ('vm1', 'admin.vm.List', None, None)] = \
+            b'0\x00vm1 class=AppVM state=Running\n'
+        self.app.expected_calls[
+            ('sys-net', 'admin.vm.List', None, None)] = \
+            b'0\x00sys-net class=AppVM state=Running\n'
+        props = {
+            'label': b'type=label green',
+            'template': b'type=vm template1',
+            'netvm': b'type=vm sys-net',
+#           'virt_mode': b'type=str pv',
+        }
+        for key, value in props.items():
+            self.app.expected_calls[
+                ('vm1', 'admin.vm.property.Get', key, None)] = \
+                b'0\x00default=True ' + value
+
+        # setup sys-net
+        props['label'] = b'type=label red'
+        for key, value in props.items():
+            self.app.expected_calls[
+                ('sys-net', 'admin.vm.property.Get', key, None)] = \
+                b'0\x00default=True ' + value
+
+        with qubesadmin.tests.tools.StdoutBuffer() as stdout:
+            qubesadmin.tools.qvm_ls.main(['vm1', 'sys-net'], app=self.app)
+        self.assertEqual(stdout.getvalue(),
+            'NAME     STATE    CLASS  LABEL  TEMPLATE   NETVM\n'
+            'sys-net  Running  AppVM  red    template1  sys-net\n'
+            'vm1      Running  AppVM  green  template1  sys-net\n')
+        self.assertAllCalled()

qubesadmin/tools/qvm_ls.py

@@ -384,11 +384,11 @@ FlagsColumn()
 class Table(object):
     '''Table that is displayed to the user.
 
-    :param qubes.Qubes app: Qubes application object.
+    :param domains: Domains to include in the table.
     :param list colnames: Names of the columns (need not to be uppercase).
     '''
-    def __init__(self, app, colnames, spinner, raw_data=False):
-        self.app = app
+    def __init__(self, domains, colnames, spinner, raw_data=False):
+        self.domains = domains
         self.columns = tuple(Column.columns[col.upper().replace('_', '-')]
                 for col in colnames)
         self.spinner = spinner
@@ -417,12 +417,12 @@ class Table(object):
             self.spinner.show('please wait...')
             table_data.append(self.get_head())
             self.spinner.update()
-            for vm in sorted(self.app.domains):
+            for vm in sorted(self.domains):
                 table_data.append(self.get_row(vm))
             self.spinner.hide()
             qubesadmin.tools.print_table(table_data, stream=stream)
         else:
-            for vm in sorted(self.app.domains):
+            for vm in sorted(self.domains):
                 stream.write('|'.join(self.get_row(vm)) + '\n')
 
 
@@ -504,6 +504,7 @@ def get_parser():
         initial_indent='  ', subsequent_indent='  ')
 
     parser = qubesadmin.tools.QubesArgumentParser(
+        vmname_nargs=argparse.ZERO_OR_MORE,
         formatter_class=argparse.RawTextHelpFormatter,
         description='List Qubes domains and their parametres.',
         epilog='available formats (see --help-formats):\n{}\n\n'
@@ -579,7 +580,11 @@ def main(args=None, app=None):
     else:
         spinner = qubesadmin.spinner.DummySpinner(sys.stderr)
 
-    table = Table(args.app, columns, spinner, args.raw_data)
+    if args.domains:
+        domains = args.domains
+    else:
+        domains = args.app.domains
+    table = Table(domains, columns, spinner, args.raw_data)
     table.write_table(sys.stdout)
 
     return 0