From 4700c2f1894732460d0fbe366580f32c19bf568e Mon Sep 17 00:00:00 2001
From: Erik Johnson <palehose@gmail.com>
Date: Wed, 5 Mar 2014 16:05:08 -0600
Subject: [PATCH] Add lowpkg.unpurge for dpkg

---
 salt/modules/dpkg.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/salt/modules/dpkg.py b/salt/modules/dpkg.py
index 2e4106ed40..747277dcda 100644
--- a/salt/modules/dpkg.py
+++ b/salt/modules/dpkg.py
@@ -6,6 +6,9 @@ Support for DEB packages
 # Import python libs
 import logging
 
+# Import salt libs
+import salt.utils
+
 log = logging.getLogger(__name__)
 
 # Define the module's virtual name
@@ -19,6 +22,31 @@ def __virtual__():
     return __virtualname__ if __grains__['os_family'] == 'Debian' else False
 
 
+def unpurge(*packages):
+    '''
+    Change package selection for each package specified to 'install'
+
+    CLI Example:
+
+    .. code-block:: bash
+
+        salt '*' lowpkg.unpurge curl
+    '''
+    if not packages:
+        return {}
+    old = __salt__['pkg.list_pkgs'](purge_desired=True)
+    ret = {}
+    __salt__['cmd.run'](
+        ['dpkg', '--set-selections'],
+        stdin=r'\n'.join(['{0} install'.format(x) for x in packages]),
+        python_shell=False,
+        output_loglevel='debug'
+    )
+    __context__.pop('pkg.list_pkgs', None)
+    new = __salt__['pkg.list_pkgs'](purge_desired=True)
+    return salt.utils.compare_dicts(old, new)
+
+
 def list_pkgs(*packages):
     '''
     List the packages currently installed in a dict::