Add exclude-packages flag support

Allow configuring specific packages to be excluded.  This will allow
users to specify things NOT to install, and if they are attempted an
error will be generated.

Upstream-Status: Pending

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>

Index: smart-1.4.1/smart/const.py
===================================================================
--- smart-1.4.1.orig/smart/const.py
+++ smart-1.4.1/smart/const.py
@@ -70,6 +70,7 @@ DATADIR     = "/var/lib/smart/"
 USERDATADIR = "~/.smart/"
 CONFFILE    = "config"
 
+LOCKED_EXCLUDE     = Enum('LOCKED_EXCLUDE')
 LOCKED_INSTALL     = Enum('LOCKED_INSTALL')
 LOCKED_REMOVE      = Enum('LOCKED_REMOVE')
 LOCKED_CONFLICT    = Enum('LOCKED_CONFLICT')
Index: smart-1.4.1/smart/transaction.py
===================================================================
--- smart-1.4.1.orig/smart/transaction.py
+++ smart-1.4.1/smart/transaction.py
@@ -19,7 +19,7 @@
 # along with Smart Package Manager; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #
-from smart.const import INSTALL, REMOVE, UPGRADE, FIX, REINSTALL, KEEP, LOCKED_INSTALL, LOCKED_CONFLICT, LOCKED_CONFLICT_BY, LOCKED_NO_COEXIST, LOCKED_SYSCONF, LOCKED_REMOVE
+from smart.const import INSTALL, REMOVE, UPGRADE, FIX, REINSTALL, KEEP, LOCKED_EXCLUDE, LOCKED_INSTALL, LOCKED_CONFLICT, LOCKED_CONFLICT_BY, LOCKED_NO_COEXIST, LOCKED_SYSCONF, LOCKED_REMOVE
 from smart.cache import PreRequires, Package
 from smart import *
 
@@ -29,7 +29,9 @@ def lock_reason(pkg, lockvalue):
     except TypeError:
         reason = None
         lockvalue = None
-    if reason == LOCKED_INSTALL:
+    if reason == LOCKED_EXCLUDE:
+        return _("%s is to be excluded") % pkg
+    elif reason == LOCKED_INSTALL:
         return _("%s is to be installed") % pkg
     elif reason == LOCKED_CONFLICT:
         return _("%s conflicts with %s") % (pkg, otherpkg)
@@ -210,6 +212,10 @@ class Policy(object):
                 self._sysconflocked.append(pkg)
                 self._locked[pkg] = (LOCKED_SYSCONF, None)
 
+        for pkg in pkgconf.filterByFlag("exclude-packages", cache.getPackages()):
+            if pkg not in self._locked:
+                self._locked[pkg] = (LOCKED_EXCLUDE, None)
+
     def runFinished(self):
         self._priorities.clear()
         for pkg in self._sysconflocked:
Index: smart-1.4.1/smart/commands/flag.py
===================================================================
--- smart-1.4.1.orig/smart/commands/flag.py
+++ smart-1.4.1/smart/commands/flag.py
@@ -47,6 +47,8 @@ Currently known flags are:
   multi-version - Flagged packages may have more than one version
                   installed in the system at the same time
                   (backend dependent).
+  exclude-packages - Flagged packages will be excluded, if they are
+                  required, an error will be generated.
   ignore-recommends - Flagged packages will not be installed, if
                   they are only recommended by a package to be
                   installed rather than required.