Stolen efi-image and grub-cpmodules from src:live-installer

These two scripts simplify the creation of efi images based on grub-efi.
I have decided to simply steal them. If I had to include them thanks to a source package that would have mean that an src repo would have to be defined by default.
TODO: Ask in a bug a RFE so that these two scripts are put into a binary that could be consumed by both live-installer and live-build packages.

scripts/build/efi-image

@@ -0,0 +1,85 @@
+#! /bin/sh
+set -e
+
+# Copyright (C) 2010, 2011 Canonical Ltd.
+# Author: Colin Watson <cjwatson@ubuntu.com>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+
+# Make an EFI boot image.
+
+if [ -z "$1" ] || [ -z "$2" ]; then
+	echo "usage: $0 OUTPUT-DIRECTORY GRUB-PLATFORM EFI-NAME NETBOOT-PREFIX"
+	exit 1
+fi
+
+outdir="$1"
+platform="$2"
+efi_name="$3"
+netboot_prefix="$4"
+
+memdisk_img=
+workdir=
+
+cleanup () {
+	[ -z "$memdisk_img" ] || rm -f "$memdisk_img"
+	[ -z "$workdir" ] || rm -rf "$workdir"
+}
+trap cleanup EXIT HUP INT QUIT TERM
+
+rm -rf "$outdir"
+mkdir -p "$outdir"
+
+memdisk_img="$(mktemp efi-image.XXXXXX)"
+workdir="$(mktemp -d efi-image.XXXXXX)"
+
+# Skeleton configuration file which finds the real boot disk.
+mkdir -p "$workdir/boot/grub"
+cat >"$workdir/boot/grub/grub.cfg" <<EOF
+search --file --set=root /.disk/info
+set prefix=(\$root)/boot/grub
+source \$prefix/$platform/grub.cfg
+EOF
+
+mkdir -p "$outdir/boot/grub/$platform"
+(for i in /usr/lib/grub/$platform/part_*.mod; do
+    i=`echo $i | sed 's?^.*/??g;s?\.mod$??g;'`
+	echo "insmod $i"
+ done; \
+ echo "source /boot/grub/grub.cfg") >"$outdir/boot/grub/$platform/grub.cfg"
+
+# Build the core image.
+(cd "$workdir"; tar -cf - boot) >"$memdisk_img"
+grub-mkimage -O "$platform" -m "$memdisk_img" \
+	-o "$workdir/boot$efi_name.efi" -p '(memdisk)/boot/grub' \
+	search iso9660 configfile normal memdisk tar part_msdos part_gpt fat
+
+grub-mkimage -O "$platform" \
+	-o "$outdir/bootnet$efi_name.efi" -p "$netboot_prefix/grub" \
+	search configfile normal efinet tftp net
+
+# Stuff it into a FAT filesystem, making it as small as possible.  24KiB
+# headroom seems to be enough; (x+31)/32*32 rounds up to multiple of 32.
+mkfs.msdos -C "$outdir/efi.img" \
+	$(( ($(stat -c %s "$workdir/boot$efi_name.efi") / 1024 + 55) \
+	    / 32 * 32 ))
+mmd -i "$outdir/efi.img" ::efi
+mmd -i "$outdir/efi.img" ::efi/boot
+mcopy -i "$outdir/efi.img" "$workdir/boot$efi_name.efi" \
+	"::efi/boot/boot$efi_name.efi"
+
+grub-cpmodules "$outdir" "$platform"
+
+exit 0

scripts/build/grub-cpmodules

@@ -0,0 +1,55 @@
+#! /bin/sh
+set -e
+
+# Copyright (C) 2010, 2011 Canonical Ltd.
+# Author: Colin Watson <cjwatson@ubuntu.com>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 2, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+
+# Copy GRUB modules.
+
+# TODO: take the modules list as parameter, and only include the needed modules, using moddeps.lst to get dependencies
+
+if [ -z "$1" ] || [ -z "$2" ]; then
+	echo "usage: $0 OUTPUT-DIRECTORY GRUB-PLATFORM"
+	exit 1
+fi
+
+outdir="$1"
+platform="$2"
+
+# Copy over GRUB modules, except for those already built in.
+cp -a "/usr/lib/grub/$platform"/*.lst "$outdir/boot/grub/$platform/"
+for x in "/usr/lib/grub/$platform"/*.mod; do
+	# TODO: Some of these exclusions are based on knowledge of module
+	# dependencies.  It would be nice to have a way to read the module
+	# list directly out of the image.
+	case $(basename "$x" .mod) in
+	    configfile|fshelp|iso9660|memdisk|search|search_fs_file|search_fs_uuid|search_label|tar)
+		# included in boot image
+		;;
+	    affs|afs|afs_be|befs|befs_be|minix|nilfs2|sfs|zfs|zfsinfo)
+		# unnecessary filesystem modules
+		;;
+	    example_functional_test|functional_test|hello)
+		# other cruft
+		;;
+	    *)
+		cp -a "$x" "$outdir/boot/grub/$platform/"
+		;;
+	esac
+done
+
+exit 0