Install-Archlinux-Script.sh

#!/bin/bash

# This is an easy script for my own use. It reinstalls my Archlinux system faster.
echo "This script is for reinstall my Archlinux system faster."
echo "It uses BIOS Legacy (not UEFI), ext4 partitions and Spanish layout, locale and mirror."
read -p "I'm not responsible for any damage in your system. Do you agree? (y/n) " RESPONSE

while [ "${RESPONSE,,}" != "y" ] && [ "${RESPONSE,,}" != "n" ]
do
  echo "I don't understand you."
  read -p "I'm not responsible for any damage in your system. Do you agree? (y/n) " RESPONSE
done

if [ "${RESPONSE,,}" == "n" ]
then
  exit 1
fi

# Set the keyboard layout
echo "Loading es layout..."
loadkeys es

# Set the font
echo "Setting Terminus font..."
setfont Lat2-Terminus16

# Set locale and generate it/them
sed -i.bak -e 's/#es_ES.UTF-8/es_ES.UTF-8/; s/en_US.UTF-8/#en_US.UTF-8/' /etc/locale.gen
locale-gen
export LANG=es_ES.UTF-8

# Establish an internet connection
########

# Preparing storage devices
# First we show them
lsblk

CORRECT="n"
ROOT=""
while [ ${CORRECT,,} == "n" ]
do
  read -p "Number of partitions: " PARTITIONS
  declare -A mountpoints
  for (( partition=1 ; partition<=$PARTITIONS ; partition++ ))
  do
    read -p "Type the partition (/dev/sdxn), a mountpoint (/,/home...) " PARTITION MOUNTPOINT
    mountpoints["$PARTITION"]="$MOUNTPOINT"
    if [ $MOUNTPOINT == "/" ]
    then
      ROOT="$PARTITION"
    fi
  done

  for mountpoint in "${!mountpoints[@]}"; do echo "$mountpoint -> ${mountpoints["$mountpoint"]}"; done
  read -p "Is this correct? (y/n) " CORRECT
  while [ "${CORRECT,,}" != "y" ] && [ "${CORRECT,,}" != "n" ]
  do
    echo "I don't understand you."
    read -p "Is this correct? (y/n) " CORRECT
  done

  if [ ${ROOT,,} == "" ]
  then
    CORRECT="n"
    echo "Not / partition found"
  fi

done

for partition in "${!mountpoints[@]}"
do
  mkfs.ext4 $partition
done
########

# Mount the partitions
echo "Mounting partitions..."
mount $ROOT /mnt
unset mountpoints[$ROOT]

for partition in "${!mountpoints[@]}"
do
  mkdir /mnt${mountpoints["$partition"]}
  mount $partition /mnt${mountpoints["$partition"]}
done


# Select a mirror and update pacman database
echo "Selecting the osl mirror and updating pacman database..."
sed -i.bak '1iServer = http://osl.ugr.es/archlinux/$repo/os/$arch' /etc/pacman.d/mirrorlist
pacman -Syy

# Install the base system
echo "Installing your system!"
pacstrap -i /mnt base base-devel --noconfirm

# Generate an fstab
genfstab -U -p /mnt >> /mnt/etc/fstab

# Download chroot script
wget http://goo.gl/SdQi6D -O /mnt/After-chroot.sh

# Chroot and configure
arch-chroot /mnt /bin/bash -c "chmod u+x After-chroot.sh && ./After-chroot.sh"

# Umount all partitions
umount -R /mnt

echo "Voilá! Reboot your system and enjoy Archlinux!"