From f36695098443076b8eb12399c286136ac8ed50d3 Mon Sep 17 00:00:00 2001
From: Colin Watson <cjwatson@ubuntu.com>
Date: Mon, 13 Jan 2014 12:13:24 +0000
Subject: Skip Windows os-prober entries on Wubi systems

Since we're already being booted from the Windows boot loader, including
entries that take us back to it mostly just causes confusion, and stops
us from being able to hide the menu if there are no other OSes
installed.

https://blueprints.launchpad.net/ubuntu/+spec/foundations-o-wubi

Forwarded: not-needed
Last-Update: 2013-11-26

Patch-Name: wubi-no-windows.patch
---
 util/grub.d/30_os-prober.in | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/util/grub.d/30_os-prober.in b/util/grub.d/30_os-prober.in
index e2ec80eb9..98aee403e 100644
--- a/util/grub.d/30_os-prober.in
+++ b/util/grub.d/30_os-prober.in
@@ -113,6 +113,8 @@ EOF
 
 used_osprober_linux_ids=
 
+wubi=
+
 for OS in ${OSPROBED} ; do
   DEVICE="`echo ${OS} | cut -d ':' -f 1`"
   LONGNAME="`echo ${OS} | cut -d ':' -f 2 | tr '^' ' '`"
@@ -149,6 +151,23 @@ for OS in ${OSPROBED} ; do
   case ${BOOT} in
     chain)
 
+      case ${LONGNAME} in
+	Windows*)
+	  if [ -z "$wubi" ]; then
+	    if [ -x /usr/share/lupin-support/grub-mkimage ] && \
+	       /usr/share/lupin-support/grub-mkimage --test; then
+	      wubi=yes
+	    else
+	      wubi=no
+	    fi
+	  fi
+	  if [ "$wubi" = yes ]; then
+	    echo "Skipping ${LONGNAME} on Wubi system" >&2
+	    continue
+	  fi
+	  ;;
+      esac
+
 	  onstr="$(gettext_printf "(on %s)" "${DEVICE}")"
       cat << EOF
 menuentry '$(echo "${LONGNAME} $onstr" | grub_quote)' $CLASS --class os \$menuentry_id_option 'osprober-chain-$(grub_get_device_id "${DEVICE}")' {