sysprep: New operation to remove RPM database files.

See:
https://lists.fedoraproject.org/pipermail/devel/2013-June/184389.html

po/POTFILES-ml

@@ -32,6 +32,7 @@ sysprep/sysprep_operation_pam_data.ml
 sysprep/sysprep_operation_puppet_data_log.ml
 sysprep/sysprep_operation_random_seed.ml
 sysprep/sysprep_operation_rhn_systemid.ml
+sysprep/sysprep_operation_rpm_db.ml
 sysprep/sysprep_operation_samba_db_log.ml
 sysprep/sysprep_operation_script.ml
 sysprep/sysprep_operation_smolt_uuid.ml

sysprep/Makefile.am

@@ -55,6 +55,7 @@ operations = \
 	puppet_data_log \
 	random_seed \
 	rhn_systemid \
+	rpm_db \
 	samba_db_log \
 	script \
 	smolt_uuid \

sysprep/sysprep_operation_rpm_db.ml

@@ -0,0 +1,49 @@
+(* virt-sysprep
+ * Copyright (C) 2013 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+open Sysprep_operation
+open Common_gettext.Gettext
+
+module StringSet = Set.Make (String)
+module G = Guestfs
+
+let rpm_db_perform g root =
+  let pf = g#inspect_get_package_format root in
+  if pf = "rpm" then (
+    let paths = g#glob_expand "/var/lib/rpm/__db.*" in
+    Array.iter (
+      fun filename ->
+        try g#rm filename with G.Error _ -> ()
+    ) paths;
+    []
+  )
+  else []
+
+let rpm_db_op = {
+  name = "rpm-db";
+  enabled_by_default = true;
+  heading = s_"Remove host-specific RPM database files";
+  pod_description = Some (s_"\
+Remove host-specific RPM database files and locks.  RPM will
+recreate these files automatically if needed.");
+  extra_args = [];
+  perform_on_filesystems = Some rpm_db_perform;
+  perform_on_devices = None;
+}
+
+let () = register_operation rpm_db_op