Reference: bnc#888251
A fix for accessing nfs mounted media. A comment in the code states,
  "Convert RFC compliant NFS      nfs://server/path/to/distro
   to what mount/anaconda expect  nfs:server:/path/to/distro
   and carry the latter form around internally"
We need the RFC version to work correctly whereas redhat's anaconda
needs their own modified version.
Index: virt-manager-1.4.2/virtinst/util.py
===================================================================
--- virt-manager-1.4.2.orig/virtinst/util.py
+++ virt-manager-1.4.2/virtinst/util.py
@@ -421,3 +421,22 @@ def getInstallRepos():
         return (0, [])
     return lookupZypperRepos(getHostInstallSource())
 
+def sanitize_url(url):
+    """
+    Do nothing for http or ftp, but make sure nfs is in the expected format
+    """
+    if url.startswith("nfs://"):
+        # Convert RFC compliant NFS      nfs://server/path/to/distro
+        # to what mount/anaconda expect  nfs:server:/path/to/distro
+        # and carry the latter form around internally
+        url = "nfs:" + url[6:]
+
+        # If we need to add the : after the server
+        index = url.find("/", 4)
+        if index == -1:
+            raise ValueError(_("Invalid NFS format: No path specified."))
+        if url[index - 1] != ":":
+            url = url[:index] + ":" + url[index:]
+
+    return url
+
Index: virt-manager-1.4.2/virtinst/distroinstaller.py
===================================================================
--- virt-manager-1.4.2.orig/virtinst/distroinstaller.py
+++ virt-manager-1.4.2/virtinst/distroinstaller.py
@@ -44,6 +44,8 @@ def _sanitize_url(url):
     """
     Do nothing for http or ftp, but make sure nfs is in the expected format
     """
+    # This sanitize will be done later
+    return url
     if url.startswith("nfs://"):
         # Convert RFC compliant NFS      nfs://server/path/to/distro
         # to what mount/anaconda expect  nfs:server:/path/to/distro
Index: virt-manager-1.4.2/virtinst/urlfetcher.py
===================================================================
--- virt-manager-1.4.2.orig/virtinst/urlfetcher.py
+++ virt-manager-1.4.2/virtinst/urlfetcher.py
@@ -34,6 +34,7 @@ import urlparse
 import requests
 
 from .osdict import OSDB
+from virtinst import util
 
 
 #########################################################################
@@ -303,7 +304,8 @@ class _MountedURLFetcher(_LocalURLFetche
 
         logging.debug("Preparing mount at " + self._srcdir)
         if self.location.startswith("nfs:"):
-            cmd = [mountcmd, "-o", "ro", self.location[4:], self._srcdir]
+            url = util.sanitize_url(self.location)
+            cmd = [mountcmd, "-o", "ro", url[4:], self._srcdir]
         else:
             if stat.S_ISBLK(os.stat(self.location)[stat.ST_MODE]):
                 mountopt = "ro"