[OSSTEST v6 08/24] ts-debian-hvm-install: Only apply EFI workaround for Wheezy

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

The previous refactoring of preseed hooks makes this easy to do.

The underlying issue is lack of persistent variable store in our OVMF
setup, which we workaround by placing a copy of grub at the removable
media path. Add a comment saying this since I initially thought this
was just a Wheezy bug.

In Jessie the extra copy of grub can be achieved by preseeding
grub-installer/force-efi-extra-removable (since various real h/w has
similar limitations/bugs) however I haven't tested that so I didn't
add it to the preseed yet, I just mention it in the code comment.

Currently this script hardcodes Wheezy, refactor to use the 'suite'
guest_var (or $c{GuestDebianSuite})

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: wei.liu2@citrix.com
---
v6: New patch
---
 ts-debian-hvm-install | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/ts-debian-hvm-install b/ts-debian-hvm-install
index b37f0f9..f3629e1 100755
--- a/ts-debian-hvm-install
+++ b/ts-debian-hvm-install
@@ -41,9 +41,11 @@ our $disk_mb= 10000;
 our $guesthost= "$gn.guest.osstest";
 our $gho;
 
+our $gsuite= guest_var($gho,'suite',$c{GuestDebianSuite});
+
 sub preseed () {
 
-    my $preseed_file = preseed_base($gho,'wheezy','','',());
+    my $preseed_file = preseed_base($gho,$gsuite,'','',());
 
     $preseed_file .= (<<END);
 d-i netcfg/get_hostname string $gn
@@ -71,7 +73,15 @@ d-i partman-auto/expert_recipe string \\
 d-i apt-setup/cdrom/set-first boolean false
 END
 
-preseed_hook_command($gho, 'late_command', '', <<END);
+
+    # Our OVMF does not have a persistent variable store and therefore
+    # cannot remember the boot entry added by the Debian
+    # installer. Therefore we ensure that a copy of the bootloader is
+    # copied to the removable media path, which is the EFI fallback.
+    #
+    # From Jessie onwards this can be worked around by using the fix to
+    # #767037 i.e. preseeding grub-installer/force-efi-extra-removable.
+preseed_hook_command($gho, 'late_command', '', <<END) if $gsuite =~ /wheezy/;
 #!/bin/sh
 set -ex
 
-- 
2.1.4