improve error message with a hint to install grub2-common

diff --git a/vmdebootstrap b/vmdebootstrap
index eb94ae532936c73eb111f80d67116e7cd2a70504..8301bd5c6452ee333d232c412bf42e4efadebc91 100755 (executable)
--- a/vmdebootstrap
+++ b/vmdebootstrap
@@ -483,7 +483,7 @@ class VmDebootstrap(cliapp.Application):
             self.runcmd(['chroot', rootdir, 'update-grub'])
             self.runcmd(['chroot', rootdir, 'grub-install', install_dev])
         except cliapp.AppException as e:
-            self.message("Failed to configure grub2. Using extlinux.")
+            self.message("Failed. Is grub2-common installed? Using extlinux.")
         self.runcmd(['umount', os.path.join(rootdir, 'sys')])
         self.runcmd(['umount', os.path.join(rootdir, 'proc')])
         self.runcmd(['umount', os.path.join(rootdir, 'dev')])