ts-examine-hostprops-save: introduce a script to save properties

This script turns the properties stored in the runvars using the
format hostprop/$ident/$prop=$val into host properties stored in the
database.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
---
Changes since v12:
 - Introduce a dry_run variable and print a message only once if not
   saving the properties in the database.

Changes since v2:
 - Call selecthost based on the idents passed in the putative
   hostprops runvar.
 - Fix commit message.
 - Use '/' instead of '_' in the runvars.
 - Do a dry run if flight blessing != real.
 - Fix parentheses indentation.

Changes since v1:
 - Select a host for setting the properties.
 - Print a message before exiting if blessing != real.
 - Skip properties that don't contain the selected host.

diff --git a/ts-examine-hostprops-save b/ts-examine-hostprops-save
new file mode 100755 (executable)
index 0000000..188773f
--- /dev/null
+++ b/ts-examine-hostprops-save
@@ -0,0 +1,46 @@
+#!/usr/bin/perl -w
+# This is part of "osstest", an automated testing framework for Xen.
+# Copyright (C) 2017 Citrix Inc.
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+use strict qw(vars);
+use DBI;
+use POSIX;
+
+unshift @INC, qw(.);
+use Osstest;
+use Osstest::TestSupport;
+
+tsreadconfig();
+
+our $blessing = intended_blessing();
+
+logm("setting host properties");
+
+# NB: in order to aid debug only attempt to save the host props on flights
+# with intended real blessing, for the rest just do a dry run.
+our $dry_run = $blessing ne "real";
+logm("not saving host props with intended blessing $blessing != real")
+    if $dry_run;
+
+foreach my $k (sort keys %r) {
+    next unless $k =~ m/^hostprop\/([^\/]*)\/([^\/]*)$/;
+    my $ho = selecthost($1);
+    my $prop = $2;
+
+    logm("recording for $ho->{Name} $prop=$r{$k}");
+
+    set_host_property($ho, $prop, $r{$k}) if !$dry_run;
+}