#!/bin/bash

set -e
set -u

TMP="${TMP:-/var/tmp}"

DATE=$(date '+%Y-%m-%d-%H%M')
DIST="${DIST:-bok}"
REPO="${REPO:-http://apt.osdyson.org}"

# We will search for usr archive on CD:
USR_IMG=usr.img.$(echo $DATE | md5sum | cut -f1 -d ' ')

ISONAME="${ISONAME:-dyson-${DIST}-${DATE}}.iso"

ROOT="${TMP}/ROOT"
BOOTARCH="${ROOT}/boot_archive"

if [ -z "${ROOT}" ] || [ "${ROOT}" = / ]; then
    echo "WTF? Bad root: \`${ROOT}'" >&2
    exit 1
fi

rm -rf "${ROOT}"/*

echo "Preparing base system (debootstrap)..."
debootstrap \
    --no-check-gpg \
    --exclude=syslogd,gawk,aptitude \
    --include=illumos-grub,illumos-kernel,mc,vim-nox,openssh-client,wget,bzip2,xz-utils,debootstrap,less \
    "${DIST}" \
    "${ROOT}" \
    "${REPO}"

# This stuff does not make sense for LiveCD:
rm -rf "${ROOT}"/var/lib/dpkg/info
rm -rf "${ROOT}"/var/lib/apt
rm -rf "${ROOT}"/var/cache/*
rm -rf "${ROOT}"/etc/cron.*
rm -rf "${ROOT}"/var/log/*
rm -rf "${ROOT}"/var/adm/*
rm -rf "${ROOT}"/usr/share/doc/*


devfsadm -r "${ROOT}"

cat <<BOOTENV > $ROOT/boot/solaris/bootenv.rc
setprop ata-dma-enabled 1
setprop atapi-cd-dma-enabled 1
setprop console 'text'
setprop keyboard-layout US-English
setprop lba-access-ok 1
setprop prealloc-chunk-size 0x2000
setprop ttya-ignore-cd true
setprop ttya-mode 9600,8,n,1,-
setprop ttya-rts-dtr-off false
setprop ttyb-ignore-cd true
setprop ttyb-mode 9600,8,n,1,-
setprop ttyb-rts-dtr-off false
BOOTENV

cat <<VFSTAB > $ROOT/etc/vfstab
#device         device          mount           FS      fsck    mount   mount
#to mount       to fsck         point           type    pass    at boot options
#
/devices/ramdisk:a -            /               ufs     1       no     rw,nologging

VFSTAB

echo 'export LD_NOVERSION=1' >> $ROOT/etc/profile

echo "dyson-${DIST}-live" > "${ROOT}/etc/nodename"
touch "${ROOT}/etc/hostname.e1000g0"
touch "${ROOT}/etc/dhcp.e1000g0"

# Set root password (just "root"):
echo 'root:root' | chpasswd -R "$ROOT"

# See http://osdyson.org/issues/107
stty -F /dev/syscon -g > $ROOT/etc/ioctl.syscon

# Script to find and mount usr.lzma:
sed "s/USR_IMG/$USR_IMG/" "find-usr" > "${ROOT}/lib/svc/method/find-usr"
chmod +x "${ROOT}/lib/svc/method/find-usr"
sed -i '/readvfstab "\/usr"/i /lib/svc/method/find-usr >/dev/msglog 2>&1' \
    "${ROOT}/lib/svc/method/fs-root"

# WE DON"T NEED BOOTARCHIVE ON LIVECD.
# Thank you!
sed -i '/if \[ -f "${UPDATEFILE}" \]; then/ i exit $SMF_EXIT_OK' \
     "${ROOT}/lib/svc/method/fs-usr"
dummy_prog='#!/sbin/sh
exit 0
'
echo "$dummy_prog" > "${ROOT}/lib/svc/method/boot-archive"
echo "$dummy_prog" > "${ROOT}/lib/svc/method/boot-archive-update"


echo "Importing manifests..."
rm "${ROOT}/lib/svc/manifest/system/early-manifest-import.xml"

# bash or ksh, please:
bash "${ROOT}/lib/svc/method/manifest-import" \
    -f "${ROOT}/etc/svc/repository.db" \
    -d "${ROOT}/lib/svc/manifest"

# Thank you! Bye-bye!
echo "$dummy_prog" > "${ROOT}/lib/svc/method/manifest-import"


mkdir -p "${BOOTARCH}"
mkdir -p "${BOOTARCH}/usr"
mkdir -p "${BOOTARCH}/cdrom"

( cd "${ROOT}"

march=`dpkg-architecture -qDEB_HOST_MULTIARCH`
mkdir -p lib/$march
for lib in \
    libfmevent \
    liblzma \
    libsunavl \
    libxml2 \
    libz \
    libzonecfg \
    ; do
    mv -v -f usr/lib/$march/$lib.so.* lib/$march/ || \
        mv -v -f usr/lib/$lib.so.* lib/$march/
done

# List here files or directories which
# should be *moved* to boot archive.
# Caution: files from /usr require
# special treating: see below.
tar --remove-files -c -f - \
    boot/solaris/devicedb/master \
    boot/solaris/bootenv.rc \
    bin \
    dev \
    devices \
    etc \
    home \
    kernel \
    lib \
    media \
    mnt \
    opt \
    proc \
    root \
    run \
    sbin \
    srv \
    system \
    tmp \
    var \
| tar xf - -C "${BOOTARCH}"

# same, but keep source
tar -c -f - \
    platform \
    usr/bin/cat \
    usr/bin/dash \
    usr/bin/ls \
    usr/bin/sh \
    usr/lib/fs \
    usr/lib/devfsadm \
    usr/sbin \
| tar xf - -C "${BOOTARCH}"

# We need only kernel itself for GRUB.
# BTW, kernel should be in boot archive as well (WTF?)
find platform -type f -a ! -name unix -delete
)

find "${BOOTARCH}" > bootarch.list

echo "Making boot archive..."
sync; sync

size=$(du -s -m "${BOOTARCH}" | cut -f1)
((size+=10)) # +10 MB of free space
dd if=/dev/zero of="${ROOT}/boot/boot_archive" bs=1M count="$size"
lofidev=$(lofiadm -a "${ROOT}/boot/boot_archive")
rlofidev="${lofidev/lofi/rlofi}"
yes | newfs -m 0 "${rlofidev}"
mkdir -p "${ROOT}/boot/boot_archive.mount"
mount "${lofidev}" "${ROOT}/boot/boot_archive.mount"
mv "${BOOTARCH}"/* "${ROOT}/boot/boot_archive.mount"/
umount "${ROOT}/boot/boot_archive.mount"
lofiadm -d "${lofidev}"
rmdir "${BOOTARCH}"
rmdir "${ROOT}/boot/boot_archive.mount"
gzip -9 -f "${ROOT}/boot/boot_archive"


echo "Making usr archive..."
# usr will be mounted from usr.lzma:
genisoimage \
   -o "${ROOT}/${USR_IMG}" \
   -N -l -R -U \
   -allow-multidot \
   -quiet -no-iso-translate -cache-inodes -d -D \
   -V "usr" \
   "${ROOT}/usr"

rm -rf "${ROOT}/usr"
lofiadm -C lzma "${ROOT}/${USR_IMG}"


echo "Configuring GRUB..."
cat <<GRUB > "${ROOT}/boot/grub/menu.lst"
default=0
timeout=3
splashimage=/boot/grub/splash.xpm.gz
foreground=ffffff
background=215ECA
title Dyson ($DIST), $DATE
    kernel /platform/i86pc/kernel/amd64/unix -k -m verbose
    module /boot/boot_archive.gz

GRUB

echo "Making final ${ISONAME}..."
genisoimage \
    -o "${ISONAME}" \
    -b boot/grub/stage2_eltorito \
    -c .catalog \
    -no-emul-boot \
    -boot-load-size 4 \
    -boot-info-table \
    -N -l -R -U \
    -allow-multidot \
    -no-iso-translate \
    -cache-inodes \
    -d -D \
    -V "${ISONAME}" \
    "${ROOT}"

ls -lh "${ISONAME}"

exit 0