From a6a742628b560f9d5097008940547391831762c0 Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Fri, 24 Jan 2014 02:17:56 +0100
Subject: Enable generation of HDD images.

This is only useful for older BIOSes, that don't support hybrid ISO
which can otherwise be burnt onto USB key as well.
---
 preseed.sh | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 58 insertions(+), 12 deletions(-)

(limited to 'preseed.sh')

diff --git a/preseed.sh b/preseed.sh
index 729f97e..2bfdf3a 100755
--- a/preseed.sh
+++ b/preseed.sh
@@ -12,6 +12,17 @@ set -ue
 newiso=$(readlink -f "$1")
 [ -e "$newiso" ] && rm -f "$newiso"
 
+# Generate a (hybrid) ISO or an HDD image?  The latter should only be
+# useful for older BIOSes that don't support hybrid ISOs.
+case "$newiso" in
+    *.iso) type=iso;;
+    *.tar) type=hdd; archive=;;
+    *.tar.gz|*.tgz) type=hdd; archive=z;;
+    *.tar.bz|*.tar.bz2|*.tbz|*.tbz2) type=hdd; archive=j;;
+    *.tar.xz|*.txz) type=hdd; archive=J;;
+    *) echo "Error: $newiso: Unknown file type" >&2; exit 1;;
+esac
+
 iso="$2"
 test -r "$iso" || exit 1
 shift; shift
@@ -85,18 +96,53 @@ while read sum file; do
 done < ./md5sum.txt > "$md5sums"
 mv "$md5sums" "$isoeditdir/md5sum.txt"
 
-if [ -f ./boot/grub/efi.img ]; then
-    efi_opts="--efi-boot boot/grub/efi.img -append_partition 2 0x01 ./boot/grub/efi.img"
-else
-    efi_opts=
+if [ $type = hdd ]; then
+    # Generate a HDD image
+    mv ./isolinux                      ./syslinux
+    mv ./syslinux/isolinux.cfg         ./syslinux/syslinux.cfg
+    mv ./syslinux/isolinux.bin         ./syslinux/syslinux.bin
+    sed -i 's/\bisolinux\b/syslinux/g' ./syslinux/*.cfg
+    # Dereference links, which are not compatible with FAT devices
+    tar --exclude='./debian' --hard-dereference --dereference \
+        -c ${archive:+-$archive} \
+        -f "$newiso" ./
+
+    ## To burn the archive onto a USB stick:
+    # device=/dev/disk/by-id/...    # FIXME
+    # mountpoint=/mnt/usbkey        # FIXME
+    #
+    # device=$(readlink -f "$device")
+    # parted $device mklabel msdos
+    # parted $device mkpart primary 1 1G
+    # parted $device set 1 boot on
+    # mkdosfs ${device}1
+    #
+    # install-mbr $device
+    # syslinux -i ${device}1
+    #
+    # mount ${device}1 $mountpoint
+    # tar -x -C "$mountpoint" -f "$image" --no-same-owner
+    # umount "$mountpoint"
+
+elif [ $type = iso ]; then
+    # Generate a hybrid ISO image
+    if [ -f ./boot/grub/efi.img ]; then
+        efi_opts="--efi-boot boot/grub/efi.img -append_partition 2 0x01 ./boot/grub/efi.img"
+    else
+        efi_opts=
+    fi
+
+    xorriso -as mkisofs -r \
+        -checksum_algorithm_iso all \
+        -isohybrid-mbr /usr/lib/syslinux/isohdpfx.bin \
+        -b isolinux/isolinux.bin -c isolinux/boot.cat \
+        -partition_offset 16 \
+        -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot $efi_opts \
+        -o "$newiso" \
+        ./
+
+    # To burn the ISO onto a USB stick, see
+    # http://www.debian.org/CD/faq/#write-usb
 fi
-xorriso -as mkisofs -r \
-    -checksum_algorithm_iso all \
-    -isohybrid-mbr /usr/lib/syslinux/isohdpfx.bin \
-    -b isolinux/isolinux.bin -c isolinux/boot.cat \
-    -partition_offset 16 \
-    -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot $efi_opts \
-    -o "$newiso" \
-    ./
 
 rm -rf "$isoeditdir"
-- 
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