[PATCH OSSTEST v2 15/19] Debian: grub2: Use GRUB_CMDLINE_LINUX_XEN_REPLACE(_DEFAULT)

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

This overrides GRUB_CMDLINE_LINUX(_DEFAULT) which we were previously
editing but only for the Xen entries, meaning that we don't switch to
console=hvc0 for the native cases (i.e. don't break them).

We do however want to edit GRUB_CMDLINE_LINUX(_DEFAULT) to remove
"quiet" if present, since it is useful to people, especially those
using standalone mode as a provisioning tool, wanting to e.g.  compare
a boot under Xen with the native case.

This has been supported since Wheezy but in any case we supply our own
20_linux_xen grub generator based on Wheezy which supports this.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---
 Osstest/Debian.pm | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/Osstest/Debian.pm b/Osstest/Debian.pm
index d2a7be9..31aa1e6 100644
--- a/Osstest/Debian.pm
+++ b/Osstest/Debian.pm
@@ -507,7 +507,7 @@ sub setupboot_grub2 ($$$$) {
                     $v =~ s/^\s*([\'\"])(.*)\1\s*$/$2/;
                     $k{$k}= $v;
                 }
-                next if m/^GRUB_CMDLINE_(?:XEN|LINUX).*\=|^GRUB_DEFAULT.*\=/;
+                next if m/^GRUB_CMDLINE_(?:XEN|LINUX(?:_XEN_REPLACE)?(?:_DEFAULT)?).*\=|^GRUB_DEFAULT.*\=/;
                 print ::EO;
             }
             print ::EO <<END or die $!;
@@ -521,11 +521,20 @@ GRUB_CMDLINE_XEN="$xenhopt"
 END
             foreach my $k (qw(GRUB_CMDLINE_LINUX GRUB_CMDLINE_LINUX_DEFAULT)) {
                 my $v= $k{$k};
+
+                # Tailor native case
                 $v =~ s/\bquiet\b//;
+                print ::EO "$k=\"$v\"\n" or die $!;
+
+                # Xen overrides
                 $v =~ s/\b(?:console|xencons)=[0-9A-Za-z,]+//;
                 $v .= " $xenkopt" if $k eq 'GRUB_CMDLINE_LINUX';
-                print ::EO "$k=\"$v\"\n" or die $!;
-            }
+                # Ensure variable isn't zero length, or 20_linux_xen will ignore it.
+                $v .= " ";
+                my $rk = $k;
+                $rk =~ s/LINUX/LINUX_XEN_REPLACE/;
+                print ::EO "$rk=\"$v\"\n" or die $!;
+	    }
         });
     };
 
-- 
2.1.4