#!/usr/bin/env bash

##########################
# Arch Linux initilizing script
##########################

# Header for this script
TITLE="Arch_Setup"
LOGFILE=/tmp/$TITLE.log
DEPTH=1
if [[ $DEPTH == 0 ]]; then
    TAGSTR="-->"
elif [[ $DEPTH == 1 ]]; then
    TAGSTR="--->"
elif [[ $DEPTH == 2 ]]; then
    TAGSTR="----->"
elif [[ $DEPTH == 3 ]]; then
    TAGSTR="------>"
fi
echo "$TAGSTR ====== $TITLE (Logged to $LOGFILE) ======"

# For making the script stop if something fails like make.
set -e 
set -o pipefail

# Enable and start sshd so we can ssh in here in the future.
echo "$TAGSTR Enabling SSH"
systemctl enable sshd > $LOGFILE 2>&1
systemctl start sshd > $LOGFILE 2>&1

# Setup keys for pacman
echo "$TAGSTR Setting up keys for pacman"
pacman-key --init > $LOGFILE 2>&1
pacman-key --populate archlinux > $LOGFILE 2>&1

# Setup mirrors, hardcoded for now. Could have been done with rankmirror
# with USA and worldwide mirrors but eh.
echo "$TAGSTR Setting up mirror list"
mv /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist.backup > $LOGFILE 2>&1
cat <<- 'EOM05594313219813' > /etc/pacman.d/mirrorlist 
	# Server list generated by rankmirrors on 2017-11-03
	##
	## Arch Linux repository mirrorlist
	## Generated on 2017-06-28
	##
	## Worldwide
	## United States
	Server = http://mirror.nexcess.net/archlinux/$repo/os/$arch
	Server = http://mirror.epiphyte.network/archlinux/$repo/os/$arch
	Server = http://arch.mirror.constant.com/$repo/os/$arch
	Server = http://mirrors.evowise.com/archlinux/$repo/os/$arch
	Server = http://mirrors.advancedhosters.com/archlinux/$repo/os/$arch
	Server = http://mirror.math.princeton.edu/pub/archlinux/$repo/os/$arch
EOM05594313219813

# Do an update and install some packages.
echo "$TAGSTR Updating and installing base-devel, git, htop, vim, and cowsay"
pacman -Syu base-devel git htop vim cowsay --noconfirm > $LOGFILE 2>&1

# Disable root check for makepkg since we are using root for everything.
# Replace the "if (( EUID == 0 )); then" with "if (( 0 )); then" to force root
# check to always fail.
sed -i 's/if (( EUID == 0 )); then/if (( 0 )); then/' /usr/bin/makepkg > $LOGFILE 2>&1

# Install Yaourt. Why yaourt instead of pacaur? Because pacaur doesn't allow
# itself to be ran as root, even though all we have is root in the container,
# and I don't want to bother fiddling with users just for this. Yaourt on the
# other hand works fine for this.
echo "$TAGSTR Installing package-query and yaourt"
mkdir ~/tmp
cd ~/tmp
# ----------- package query for yaourt -----------
git clone https://aur.archlinux.org/package-query.git  > $LOGFILE 2>&1
cd package-query
makepkg -si --noconfirm  > $LOGFILE 2>&1
cd ..
# ----------- yaourt itself -----------
git clone https://aur.archlinux.org/yaourt.git > $LOGFILE 2>&1
cd yaourt
makepkg -si --noconfirm > $LOGFILE 2>&1
cd ..
# Wipe tmp dir
cd ..
rm -r -f ~/tmp

# Get the ip addresses using some grep and awk magic.
# Magic inspired by this: https://superuser.com/questions/468727/how-to-get-the-ipv6-ip-address-of-linux-machine
ipv6addr=$(ip -6 addr show eth0 | grep /128 | grep -v fd75 | awk '{a=$2; split(a, b, "/"); print b[1]}')
ipv4addr=$(ip -4 addr show eth0 | grep inet | awk '{a=$2; split(a, b, "/"); print b[1]}')

# Lastly, say we are done.
echo "$TAGSTR Completed $TITLE"