Fix failure to re-provision.

Somewhere in the conversion from ejs we lost calling the 'delete
partitions' code.  However, we have to be careful not to wipe
partitions when we are the second client connecting to an LDAP server.

Andrew Bartlett
(This used to be commit 272eb765b8)

source4/scripting/python/samba/provision.py

@@ -279,8 +279,6 @@ def setup_samdb_partitions(samdb_path, setup_path, message, lp, session_info,
     
     Alternatively, provision() may call this, and then populate the database.
     
-    :param erase: Remove the existing data present in the database.
-     
     :note: This will wipe the Sam Database!
     
     :note: This function always removes the local SAM LDB file. The erase 
@@ -289,10 +287,15 @@ def setup_samdb_partitions(samdb_path, setup_path, message, lp, session_info,
     """
     assert session_info is not None
 
-    if os.path.exists(samdb_path):
+    samdb = SamDB(samdb_path, session_info=session_info, 
+                  credentials=credentials, lp=lp)
+
+    # Wipes the database
+    try:
+        samdb.erase()
+    except:
         os.unlink(samdb_path)
 
-    # Also wipes the database
     samdb = SamDB(samdb_path, session_info=session_info, 
                   credentials=credentials, lp=lp)
 
@@ -547,7 +550,7 @@ def setup_self_join(samdb, configdn, schemadn, domaindn,
 
 def setup_samdb(path, setup_path, session_info, credentials, lp, 
                 schemadn, configdn, domaindn, dnsdomain, realm, 
-                netbiosname, message, hostname, rootdn, erase, 
+                netbiosname, message, hostname, rootdn, 
                 domainsid, aci, domainguid, policyguid, 
                 domainname, fill, adminpass, krbtgtpass, 
                 machinepass, hostguid, invocationid, dnspass,
@@ -560,6 +563,8 @@ def setup_samdb(path, setup_path, session_info, credentials, lp,
 
     assert serverrole in ("domain controller", "member server")
 
+    erase = (fill != FILL_DRS)    
+
     # Also wipes the database
     setup_samdb_partitions(path, setup_path, schemadn=schemadn, configdn=configdn, 
                            domaindn=domaindn, message=message, lp=lp,
@@ -726,7 +731,7 @@ def provision(lp, setup_dir, message, paths, session_info,
               hostguid=None, adminpass=None, krbtgtpass=None, domainguid=None, 
               policyguid=None, invocationid=None, machinepass=None, 
               dnspass=None, root=None, nobody=None, nogroup=None, users=None, 
-              wheel=None, backup=None, aci=None, serverrole=None, erase=False,
+              wheel=None, backup=None, aci=None, serverrole=None,
               ldap_backend=None, ldap_backend_type=None, sitename=DEFAULTSITE):
     """Provision samba4
     
@@ -873,7 +878,7 @@ def provision(lp, setup_dir, message, paths, session_info,
                         configdn=configdn, domaindn=domaindn,
                         dnsdomain=dnsdomain, netbiosname=netbiosname, 
                         realm=realm, message=message, hostname=hostname, 
-                        rootdn=rootdn, erase=erase, domainsid=domainsid, 
+                        rootdn=rootdn, domainsid=domainsid, 
                         aci=aci, domainguid=domainguid, policyguid=policyguid, 
                         domainname=domain, fill=samdb_fill, 
                         adminpass=adminpass, krbtgtpass=krbtgtpass,