#!/bin/ash
#
# Alpine Linux use "ash" as the default shell.

exec >/dev/tty0 2>&1

# Delete the initial script itself to prevent to be executed in the new system.
rm -f /etc/local.d/ubuntuConf.start
rm -f /etc/runlevels/default/local

# Get Ubuntu Linux configurations.
confFile="/root/alpine.config"

# Read configs from initial file.
IncDisk=$(grep "IncDisk" $confFile | awk '{print $2}')
LinuxMirror=$(grep "LinuxMirror" $confFile | awk '{print $2}')
alpineVer=$(grep "alpineVer" $confFile | awk '{print $2}')
TimeZone=$(grep "TimeZone" $confFile | awk '{print $2}')
tmpWORD=$(grep "tmpWORD" $confFile | awk '{print $2}')
sshPORT=$(grep "sshPORT" $confFile | awk '{print $2}')
IPv4=$(grep "IPv4" $confFile | awk '{print $2}')
MASK=$(grep "MASK" $confFile | awk '{print $2}')
ipPrefix=$(grep "ipPrefix" $confFile | awk '{print $2}')
GATE=$(grep "GATE" $confFile | awk '{print $2}')
ipDNS1=$(grep "ipDNS1" $confFile | awk '{print $2}')
ipDNS2=$(grep "ipDNS2" $confFile | awk '{print $2}')
ip6Addr=$(grep "ip6Addr" $confFile | awk '{print $2}')
ip6Mask=$(grep "ip6Mask" $confFile | awk '{print $2}')
ip6Gate=$(grep "ip6Gate" $confFile | awk '{print $2}')
ip6DNS1=$(grep "ip6DNS1" $confFile | awk '{print $2}')
ip6DNS2=$(grep "ip6DNS2" $confFile | awk '{print $2}')
HostName=$(grep "HostName" $confFile | awk '{print $2}')
DDURL=$(grep "DDURL" $confFile | awk '{print $2}')
targetLinuxMirror=$(grep "targetLinuxMirror" $confFile | awk '{print $2}')
cloudInitUrl=$(grep "cloudInitUrl" $confFile | awk '{print $2}')

# Reset configurations of repositories
true >/etc/apk/repositories
setup-apkrepos $LinuxMirror/$alpineVer/main
setup-apkcache /var/cache/apk

# Add community mirror
sed -i '$a\'$LinuxMirror'/'$alpineVer'/community' /etc/apk/repositories
# Add edge testing to the repositories
sed -i '$a\'$LinuxMirror'/edge/testing' /etc/apk/repositories

# Install necessary components.
apk update
apk add bash ca-certificates coreutils e2fsprogs hdparm multipath-tools parted sed util-linux wget

# start dd
wget --no-check-certificate -qO- "$DDURL" | dd of="$IncDisk"

# get valid loop device
loopDevice=$(echo $(losetup -f))
loopDeviceNum=$(echo $(losetup -f) | cut -d'/' -f 3)

# make a soft link between valid loop device and disk
losetup $loopDevice $IncDisk

# get mapper partition
mapperDevice=$(kpartx -av $loopDevice | grep "$loopDeviceNum" | head -n 1 | awk '{print $3}')

# mount Ubuntu dd partition to /mnt
mount /dev/mapper/$mapperDevice /mnt

# download cloud init file
wget --no-check-certificate -qO /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg ''$cloudInitUrl''

# user config
sed -ri 's/HostName/'${HostName}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/tmpWORD/'${tmpWORD}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/sshPORT/'${sshPORT}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/TimeZone/'${TimeZone}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/targetLinuxMirror/'${targetLinuxMirror}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/IPv4/'${IPv4}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/MASK/'${MASK}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/ipPrefix/'${ipPrefix}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/GATE/'${GATE}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/ipDNS1/'${ipDNS1}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/ipDNS2/'${ipDNS2}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/ip6Addr/'${ip6Addr}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/ip6Mask/'${ip6Mask}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/ip6Gate/'${ip6Gate}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/ip6DNS1/'${ip6DNS1}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
sed -ri 's/ip6DNS2/'${ip6DNS2}'/g' /mnt/etc/cloud/cloud.cfg.d/99-fake_cloud.cfg

# Reboot, the system in the memory will all be written to the hard drive.
exec reboot