gentoo.html

#!/bin/bash

source config

function createPartitions
{
  sgdisk --zap-all $DRIVE
  sleep 1
  sgdisk --clear \
         --new=1:0:+600MiB --typecode=1:ef00 --change-name=1:EFI \
         --new=2:0:+500MiB --typecode=2:8300 --change-name=2:BOOT \
         --new=3:0:0       --typecode=3:8300 --change-name=3:SYSTEM \
           $DRIVE
           
  sleep 1
  # Init Filesystem
  mkfs.vfat -F32 /dev/disk/by-partlabel/EFI
  sleep 1
  mkfs.ext4 /dev/disk/by-partlabel/BOOT
  sleep 1
  mkfs.ext4 /dev/disk/by-partlabel/SYSTEM
}

function setupEncryption
{
  modprobe dm-crypt
  sleep 1
  modprobe dm-mod
  sleep 1
  cryptsetup luksFormat -v -s 512 -h sha512 /dev/disk/by-partlabel/SYSTEM
  sleep 1
  cryptsetup --allow-discards --persistent open /dev/disk/by-partlabel/SYSTEM archsystem
  sleep 1
}

function setupFilesystemExt4
{  
  if [ "$ENCRYPT_SYSTEM" = true ]; then
    SYSTEM_DRIVE=/dev/mapper/archsystem
  else
    SYSTEM_DRIVE=/dev/disk/by-partlabel/SYSTEM
  fi
  mkdir -p /mnt/system
  mount $SYSTEM_DRIVE /mnt/system
  sleep 1
}

function setupFilesystemBtrfs
{
  if [ "$ENCRYPT_SYSTEM" = true ]; then
    SYSTEM_DRIVE=/dev/mapper/archsystem
  else
    SYSTEM_DRIVE=/dev/disk/by-partlabel/SYSTEM
  fi
  mkfs.btrfs -f -L archbtrfs $SYSTEM_DRIVE
  sleep 1
  mkdir -p /mnt/system
  mount $SYSTEM_DRIVE /mnt/system
  sleep 1
  
  # Mount Filesystem
  btrfs subvolume create /mnt/system/@
  sleep 1
  btrfs subvolume create /mnt/system/@home
  sleep 1
  btrfs subvolume create /mnt/system/@var
  sleep 1
  btrfs subvolume create /mnt/system/@snapshots
  sleep 1
  umount /mnt/system
  sleep 1
  mount -o noatime,compress=lzo,subvol=@ $SYSTEM_DRIVE /mnt/system
  sleep 1
  mkdir -p /mnt/system/{home,var,.snapshots}
  sleep 1
  mount -o noatime,compress=lzo,subvol=@home $SYSTEM_DRIVE /mnt/system/home
  sleep 1
  mount -o noatime,compress=lzo,subvol=@var $SYSTEM_DRIVE /mnt/system/var
  sleep 1
  mount -o noatime,compress=lzo,subvol=@snapshots $SYSTEM_DRIVE /mnt/system/.snapshots
  sleep 1
}

function mountBoot
{
  mkdir -p /mnt/system/boot
  sleep 1
  mount /dev/disk/by-partlabel/BOOT /mnt/system/boot
  sleep 1
  mkdir /mnt/system/boot/EFI
  sleep 1
  mount /dev/disk/by-partlabel/EFI /mnt/system/boot/EFI
  sleep 1
}

function installSystemArch
{
  pacstrap /mnt/system base base-devel linux linux-headers linux-firmware vim curl
  sleep 1
  genfstab -U /mnt/system >> /mnt/system/etc/fstab
  sleep 1
  vim /mnt/system/etc/fstab
  sleep 1
  curl -LJO tomasrejhons.github.io/malis/post-install
  sleep 1
  cp post-install /mnt/system/post-install
  sleep 1
  cp config /mnt/system/config
  sleep 1
  arch-chroot /mnt/system
}

function gentooStage3
{
  cd /mnt/system
  sleep 1
  wget https://bouncer.gentoo.org/fetch/root/all/releases/amd64/autobuilds/20220315T091810Z/stage3-amd64-openrc-20220315T091810Z.tar.xz
  sleep 1
  tar xpvf ./stage3-amd64-openrc-20220315T091810Z.tar.xz --xattrs-include='*.*' --numeric-owner
  sleep 1
  mirrorselect -i -o >> /mnt/system/etc/portage/make.conf
  sleep 1  
  mkdir -p /mnt/system/etc/portage/repos.conf && cp /mnt/system/usr/share/portage/config/repos.conf /mnt/system/etc/portage/repos.conf/gentoo.conf
  sleep 1
  cp --dereference /etc/resolv.conf /mnt/system/etc/
  sleep 1  
  mount --types proc /proc /mnt/system/proc
  sleep 1
  mount --rbind /sys /mnt/system/sys
  mount --make-rslave /mnt/system/sys
  mount --rbind /dev /mnt/system/dev
  mount --make-rslave /mnt/system/dev
  mount --bind /run /mnt/system/run
  mount --make-slave /mnt/system/run
  
  chroot /mnt/system /bin/bash
  source /etc/profile
  export PS1="[chroot] ${PS1}"
}

createPartitions

if [ "$ENCRYPT_SYSTEM" = true ]; then
  setupEncryption
fi

if [ "$USE_BTRFS" = true ]; then
  setupFilesystemBtrfs
else
  setupFilesystemExt4
fi

mountBoot
gentooStage3