testing file for automated arch install

arch-test-install

#!/bin/bash
# vim: fdm=marker
# the most unsecure way to use this:
#   curl -sL -H 'Cache-Control: no-cache' https://git.io/vbh2O
set -e

if [ ! $(hostname) == "archiso" ]; then
    >&2 echo "Not in the Arch install environment, exiting for safety"
    exit 1
fi

# make sure device is not swapped or mounted
cat /proc/swaps \
    | awk "/${1//\//\\\/}/ { print \$1 }" \
    | xargs -r swapoff -v
cat /proc/mounts \
    | awk "/${1//\//\\\/}/ { print \$2 }" \
    | sort -r \
    | xargs -r umount -v

# --- Partitioning ---  {{{

# Create the following partition layout:
#   /dev/sdX1 - ESP partition (512mb)
#   /dev/sdX2 - Swap partition (same as RAM)
#   /dev/sdX3 - btrfs root partition (the rest)
device=/dev/sda
ram=$(awk '/MemTotal/ { print int($2/1024)}' /proc/meminfo)
esp=( 1 1024 )
swap=( ${esp[1]} $(( ${esp[1]} + $ram )) )
root=( ${swap[1]} 100% )
mnt_opts="autodefrag,compress=lzo,discard,noatime,ssd"
subvols=( etc home opt root srv usr var )
parted --script $device \
  mklabel gpt \
  mkpart ESP fat32 ${esp[0]}MiB ${esp[1]}MiB \
  set 1 boot on \
  mkpart primary linux-swap ${swap[0]}MiB ${swap[1]}MiB \
  mkpart primary btrfs ${root[0]}MiB ${root[1]} \
  print
mkfs.fat -F32 ${device}1  # format boot partition
mkswap ${device}2  # format swap partition
swapon ${device}2  # enable swap
mkfs.btrfs -f ${device}3  # format btrfs partition
mount -v -o $mnt_opts ${device}3 /mnt
btrfs subvolume create /mnt/master
umount -v /mnt
mount -v -o $mnt_opts,subvol=master ${device}3 /mnt
btrfs subvolume create /mnt/slash_root  # create the slash_root subvol
for v in ${subvols[*]}; do
    btrfs subvolume create /mnt/$v
done
umount -v /mnt
# mount slash_root subvolume
mount -v -o $mnt_opts,subvol=master/slash_root ${device}3 /mnt
# mount boot subvolume
mkdir -vp /mnt/boot
mount -v ${device}1 /mnt/boot
# mount other subvolumes
for v in ${subvols[*]}; do
    mkdir -vp /mnt/$v
    mount -v -o $mnt_opts,subvol=master/$v ${device}3 /mnt/$v
done

#}}}
: <<SKIP_TO_HERE
# --- Target Linux Base Install --- {{{

pacman --noconfirm -Sy
pacman --noconfirm -S reflector
reflector --verbose -l 5 --sort rate --save /etc/pacman.d/mirrorlist
pacstrap /mnt base base-devel btrfs-progs

#}}}
# --- Target Configuration --- {{{

# generate fstab (and remove duplicate subvol opts)
genfstab -U -p /mnt \
    | sed 's/\(,subvol=[^,]*\)*/\1/g' \
    | tee -a /mnt/etc/fstab

# chroot into install and finish configuration
arch-chroot /mnt bash <<-EOF
    set -e

    # set locale
    sed -i 's/#\(en_US\.UTF-8 UTF-8\)/\1/' /etc/locale.gen
    locale-gen
    echo LANG=en_US.UTF-8 > /etc/locale.conf
    export LANG=en_US.UTF-8

    # timezone
    ln -sf /usr/share/zoneinfo/Europe/Berlin /etc/localtime
    hwclock --systohc --utc

    # repositories
    # TODO finish up from here

    # XXX install everything here (xorg, i3, pulse, apps, etc)?
EOF

#}}}

SKIP_TO_HERE

# TODO make sure VirtualBox directory is nocow!

bais

#!/bin/bash
# vim: fdm=marker tw=72
set -e

# This should ONLY be run from the archiso environment {{{

if [ ! $(hostname) == "archiso" ]; then
    >&2 echo "Not in the Arch install environment, exiting for safety"
    exit 1
fi

#}}}
# Usage {{{

VERSION=0.0
SCRIPT="$(basename $0)"

USAGE="${SCRIPT} - BTRFS Arch Installer Script v${VERSION}

Usage:

    ${SCRIPT} [options] <device>

Options:

    -h, --help                      Show this message and exit
    -V, --version                   Show version info and exit
    -v, --verbose                   Show more output from commands

    
Installs Vanille Arch on a btrfs filesystem to <device> (eg /dev/sda).
By default the btrfs pool will contain a subvolume for the filesystem
root named 'slash_root' and a subvolume for the home directories
named 'home'.

    WARNING: This script will DESTROY ALL DATA ON THE DEVICE!!!

"
#}}}
# Argument/Option Parsing {{{

# defaults
verbose=""
subvols=( slash_root:/ home:/home )

while [[ $1 == -* ]]; do
    case $1 in
        #-f|--flag)
        #    flag=true
        #    ;;
        #-o|--opt)
        #    opt="$2"
        #    shift  # past value
        #    ;;
        -s|--subvol)
            subvols+=( "$2" )
            shift  # past value
            ;;
        -h|--help)
            echo "$USAGE"
            exit
            ;;
        -V|--version)
            echo "${SCRIPT} v${VERSION}"
            exit
            ;;
        -v|--verbose)
            verbose='--verbose'
            ;;
        --)
            shift
            break
            ;;
        *)
            >&2 echo "${SCRIPT}: unknown option $1" \
                "(run '${SCRIPT} --help' for available options)"
            exit 1
    esac
    shift
done

if [ $# -ne 1 ]; then
    >&2 echo "$SCRIPT: Please specify a drive to install to" \
        " (run with -h for help)"
    exit 1
fi

device=$1

if [ "$verbose" ]; then
    echo "device: $device"
    echo "verbose: $verbose"
    echo "subvols:"
    for sv in ${subvols[*]}; do
        v="${sv%:*}"
        m="${sv#*:}"
        echo -e "\t$v @ $m"
    done
fi

#}}}
# --- Partitioning and mounting {{{

# first, make sure device is not swapped or mounted
cat /proc/swaps \
    | awk "/${device//\//\\\/}/ { print \$1 }" \
    | xargs -r swapoff $verbose
cat /proc/mounts \
    | awk "/${device//\//\\\/}/ { print \$2 }" \
    | sort -r \
    | xargs -r umount $verbose

# Create the following partition layout:
#   /dev/sdX1 - ESP partition (512mb)
#   /dev/sdX2 - Swap partition (same as RAM)
#   /dev/sdX3 - btrfs root partition (the rest)
ram=$(awk '/MemTotal/ { print int($2/1024)}' /proc/meminfo)
esp=( 1 1024 )
swap=( ${esp[1]} $(( ${esp[1]} + $ram )) )
root=( ${swap[1]} 100% )
mnt_opts="defaults,autodefrag,compress=lzo,discard,noatime,ssd"
parted --script $device \
  mklabel gpt \
  mkpart ESP fat32 ${esp[0]}MiB ${esp[1]}MiB \
  set 1 boot on \
  mkpart primary linux-swap ${swap[0]}MiB ${swap[1]}MiB \
  mkpart primary btrfs ${root[0]}MiB ${root[1]} \
  $(test "$verbose" && print)
mkfs.fat -F32 ${device}1
mkswap ${device}2
swapon ${device}2
mkfs.btrfs $(test ! "$verbose" && echo -q) -f -L btrfs_pool ${device}3

# Create subvolumes
#     <FS_TREE>
#     └── root
#         ├── .snapshots
#         │   ├── yyyy-mm-ddThh:mm:ss+tz:tz
#         │   ├── yyyy-mm-ddThh:mm:ss+tz:tz
#         │   └── ...
#         └── home
#             └── .snapshots
#                 ├── yyyy-mm-ddThh:mm:ss+tz:tz
#                 ├── yyyy-mm-ddThh:mm:ss+tz:tz
#                 └── ...
mount $verbose -o $mnt_opts ${device}3 /mnt
btrfs subvolume create /mnt/root
umount $verbose /mnt
mount $verbose -o $mnt_opts,subvol=root ${device}3 /mnt/
btrfs subvolume create /mnt/.snapshots
btrfs subvolume create /mnt/home
btrfs subvolume create /mnt/home/.snapshots
# don't forget about the boot partition!
mkdir -p $verbose /mnt/boot
mount $verbose ${device}1 /mnt/boot

# create first snapshots
btrfs subvolume snapshot -r /mnt/ /mnt/.snapshots/$(date -Is)
btrfs subvolume snapshot -r /mnt/home /mnt/home/.snapshots/$(date -Is)

#}}}
: <<'SKIP_TO_HERE'
# --- Target Linux Base Install {{{

pacman --noconfirm -Sy
pacman --noconfirm -S reflector
reflector $verbose -l 5 --sort rate --save /etc/pacman.d/mirrorlist
pacstrap /mnt base base-devel btrfs-progs snapper

#}}}
# --- Target Configuration {{{

# generate fstab (and remove duplicate subvol opts)
genfstab -U -p /mnt \
    | sed 's/\(,subvol=[^,]*\)*/\1/g' \
    | tee -a /mnt/etc/fstab

# chroot into install and finish configuration
arch-chroot /mnt bash <<EOF
    set -e

    # set locale
    sed -i 's/#\(en_US\.UTF-8 UTF-8\)/\1/' /etc/locale.gen
    locale-gen
    echo LANG=en_US.UTF-8 > /etc/locale.conf
    export LANG=en_US.UTF-8

    # timezone
    ln $verbose -sf /usr/share/zoneinfo/Europe/Berlin /etc/localtime
    hwclock --systohc --utc

    # repositories
    # TODO finish up from here

    # XXX install everything here (xorg, i3, pulse, apps, etc)?
EOF

#}}}

SKIP_TO_HERE

# XXX install and boot like the following link:
# https://medium.com/hello-im-alan/installing-linux-under-uefi-on-a-thinkpad-successfully-518136d175fe

# TODO in second phase, disable compression for Music, pics etc..
# TODO disable CoW for virtual machine dir!!! with chattr +C ~/VirtualMachines