commit 7e7f374c1ac6984fc50726dd649c4f4c2f56266c
Author: Valentina Mukhamedzhanova <vmukhame@redhat.com>
Date:   Wed Jan 29 12:08:30 2014 -0500

     Make 'yum install @group' give an error when trying to install a
    non-existent group.

diff --git a/cli.py b/cli.py
index c8884ae..eed63a2 100755
--- a/cli.py
+++ b/cli.py
@@ -964,6 +964,8 @@ class YumBaseCli(yum.YumBase, output.YumOutput):
                 else:
                     assert basecmd == 'install', basecmd
                     txmbrs = self.install(pattern=arg)
+            except yum.Errors.GroupInstallError, e:
+                self.verbose_logger.log(yum.logginglevels.INFO_2, e)
             except yum.Errors.InstallError:
                 self.verbose_logger.log(yum.logginglevels.INFO_2,
                                         _('No package %s%s%s available.'),
@@ -1922,6 +1924,7 @@ class YumBaseCli(yum.YumBase, output.YumOutput):
             for igrp in self.igroups.groups:
                 pkgs_used.extend(self._at_groupupgrade('@'  + igrp))
         
+        done = False
         for group_string in grouplist:
 
             grp_grp = True
@@ -1966,11 +1969,19 @@ class YumBaseCli(yum.YumBase, output.YumOutput):
             if not group_matched:
                 self.logger.error(_('Warning: group %s does not exist.'), group_string)
                 continue
+            done = True
             
         if not pkgs_used:
             if self.conf.group_command == 'objects':
                 self.logger.critical(_("Maybe run: yum groups mark install (see man yum)"))
-            return 0, [_('No packages in any requested group available to install or update')]
+            exit_status = 1
+            if upgrade:
+                # upgrades don't fail
+                exit_status = 0
+            if done:
+                # at least one group_string was a valid group
+                exit_status = 0
+            return exit_status, [_('No packages in any requested group available to install or update')]
         else:
             return 2, [P_('%d package to Install', '%d packages to Install', len(pkgs_used)) % len(pkgs_used)]
 
diff --git a/yum/Errors.py b/yum/Errors.py
index 70de539..2c2f022 100644
--- a/yum/Errors.py
+++ b/yum/Errors.py
@@ -105,6 +105,9 @@ class GroupsError(YumBaseError):
 class InstallError(YumBaseError):
     pass
 
+class GroupInstallError(InstallError):
+    pass
+
 class UpdateError(YumBaseError):
     pass
     
diff --git a/yum/__init__.py b/yum/__init__.py
index bbd20f3..b40c7e4 100644
--- a/yum/__init__.py
+++ b/yum/__init__.py
@@ -1158,8 +1158,7 @@ class YumBase(depsolve.Depsolve):
         if hasattr(self, 'term'):
             hibeg, hiend = self.term.MODE['bold'], self.term.MODE['normal']
 
-        func(_("The program %s%s%s is found in the yum-utils package.") %
-             (hibeg, prog, hiend))
+        func(_("The program %s is found in the yum-utils package.") % self._try_bold(prog))
 
     def buildTransaction(self, unfinished_transactions_check=True):
         """Go through the packages in the transaction set, find them
@@ -4451,6 +4450,12 @@ much more problems).
             if node == slow:
                 return None
 
+    def _try_bold(self, string_):
+        """Attempt to make the string look bold in terminal."""
+        if hasattr(self, 'term'):
+            return '%s%s%s' % (self.term.MODE['bold'], string_, self.term.MODE['normal'])
+        return string_
+
     def _at_groupinstall(self, pattern, upgrade=False):
         " Do groupinstall via. leading @ on the cmd line, for install."
         assert pattern[0] == '@'
@@ -4464,42 +4469,31 @@ much more problems).
             self.logger.warning(e)
             return tx_return
 
+        found = False
         if group_string and group_string[0] == '^':
             group_string = group_string[1:]
             # Actually dealing with "environment groups".
-            found = False
             for env_grp in comps.return_environments(group_string):
                 found = True
-                try:
-                    txmbrs = self.selectEnvironment(env_grp.environmentid,
-                                                    upgrade=upgrade)
-                    tx_return.extend(txmbrs)
-                except yum.Errors.GroupsError:
-                    assert False, "Checked in for loop."
-                    continue
-            if not found:
-                self.logger.error(_('Warning: Environment group %s does not exist.'),
-                                  group_string)
-            return tx_return
-
-        found = False
-        for group in comps.return_groups(group_string):
-            found = True
-            try:
+                txmbrs = self.selectEnvironment(env_grp.environmentid,
+                                                upgrade=upgrade)
+                tx_return.extend(txmbrs)
+        else:
+            for group in comps.return_groups(group_string):
+                found = True
                 txmbrs = self.selectGroup(group.groupid, upgrade=upgrade)
                 tx_return.extend(txmbrs)
-            except yum.Errors.GroupsError:
-                assert False, "Checked in for loop."
-                continue
         if not found:
-            self.logger.error(_('Warning: Package group %s does not exist.'),
-                              group_string)
-
+            raise Errors.GroupInstallError, _('Group %s does not exist.') % self._try_bold(group_string)
         return tx_return
 
     def _at_groupupgrade(self, pattern):
         " Do group upgrade via. leading @ on the cmd line, for update."
-        return self._at_groupinstall(pattern, upgrade=True)
+        try:
+            return self._at_groupinstall(pattern, upgrade=True)
+        except Errors.GroupInstallError, e:
+            self.logger.warning(_('Warning: %s'), e)
+            return []
 
     def _at_groupremove(self, pattern):
         " Do groupremove via. leading @ on the cmd line, for remove."