[PATCH OSSTEST] ts-xen-build: make collection on xen-syms optional

[Ian Campbell <ian.campbell@citrix.com>]

Fixes things on i386 for branches which no longer build an i386 hypervisor.
---
 Osstest/TestSupport.pm |    8 ++++++--
 ts-xen-build           |    2 +-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/Osstest/TestSupport.pm b/Osstest/TestSupport.pm
index 1ac4cf7..d2e29d0 100644
--- a/Osstest/TestSupport.pm
+++ b/Osstest/TestSupport.pm
@@ -846,6 +846,7 @@ sub get_stashed ($$) {
 
 sub compress_stashed($) {
     my ($path) = @_;
+    return unless -e "$stash/$path";
     my $r= system 'gzip','-9vf','--',"$stash/$path";
     die "$r $!" if $r;
 }
@@ -1051,10 +1052,13 @@ END
     store_runvar("path_$item", $stashleaf);
 }
 
-sub built_stash_file ($$$$) {
-    my ($ho, $builddir, $item, $fname) = @_;
+sub built_stash_file ($$$$;$) {
+    my ($ho, $builddir, $item, $fname, $optional) = @_;
     my $build= "build";
     my $stashleaf= "$build/$item";
+
+    return if $optional && !target_file_exists($ho, "$builddir/$fname");
+
     ensuredir("$stash/$build");
     target_getfile($ho, 300,
                    "$builddir/$fname",
diff --git a/ts-xen-build b/ts-xen-build
index 5f544df..ebb7d6f 100755
--- a/ts-xen-build
+++ b/ts-xen-build
@@ -198,7 +198,7 @@ sub stash () {
                     "xen-unstable/dist/${part}install",
                     "${part}dist");
     }
-    built_stash_file($ho, $builddir, "xen-syms", "xen-unstable/xen/xen-syms");
+    built_stash_file($ho, $builddir, "xen-syms", "xen-unstable/xen/xen-syms", 1);
     built_compress_stashed("xen-syms");
 }
 
-- 
1.7.10.4