arch/pkg/de-p1st-installer/de-p1st-installer.sh

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#!/bin/bash
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# load config
source installer.cfg || { exit 1; }
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# load functions
source helper.sh || { exit 1; }
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function check_network() {
echo "Sending ping to wikipedia.de ..."
ping -c 1 wikipedia.de || {
echo "Pleas set up network access."
return 1
}
}
function increase_cow_space() {
# May be useful when running 'pacman -Syu' on the live medium.
# Usually not necessary!
# make sure that we are on a live medium:
findmnt /run/archiso/cowspace || {
echo "Not on live medium, did not increase cowspace!"
return 1
}
echo "Increasing cowspace partition of live medium ..."
mount -o remount,size=2G /run/archiso/cowspace || return $?
}
function get_text_input {
# If variable with name $1 is zero, then ask user for input.
# Only one line user input is allowed.
# User input must not be empty.
#
# $1: name of variable to store user input
# $2: text to display (e.g. "Enter hostname:")
if [ "$#" -ne 2 ]; then
echo "get_text_input requires two args!";
return 1
fi
for i in "$@"; do
if [ -z "$i" ]; then
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echo "get_text_input: all given args must not be empty";
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return 1;
fi
done
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local -n ptr=$1
if [ -z "$ptr" ]; then
# if ptr has no value yet, ask user for input!
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echo "$2"
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read -r ptr || return $?
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fi
# check string length to be greater than zero!
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if [ "${#ptr}" -lt 1 ]; then
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echo "get_text_input must not be empty!";
return 1;
fi
}
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function get_single_choice {
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# If variable with name $1 is zero, then ask user to select one option.
#
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# $1: name of variable to store the selected option
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# $2: text to display
# $3: name of variable with space-separated menu options to display (each menu option consists of an item and a description)
if [ "$#" -ne 3 ]; then
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echo "get_single_choice requires three args!";
return 1
fi
for i in "$@"; do
if [ -z "$i" ]; then
echo "get_single_choice: all given args must not be empty";
return 1;
fi
done
local -n ptr=$1
if [ -z "$ptr" ]; then
# if ptr has no value yet, ask user for input!
local -n MENU_OPTIONS=$3
ptr=$(dialog --stdout --menu "$2" 0 0 0 ${MENU_OPTIONS}) || {
echo "Error during menu selection!"
exit 1
}
clear
fi
}
function get_multi_choice {
# If variable with name $1 is zero, then ask user to select one ore more options.
#
# $1: name of variable to store array of selected options
# $2: text to display
# $3: name of variable with space-separated menu options to display (each menu option consists of an item, a description and on/off if preselected or not)
if [ "$#" -ne 3 ]; then
echo "get_multi_choice requires three args!";
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return 1
fi
for i in "$@"; do
if [ -z "$i" ]; then
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echo "get_multi_choice: all given args must not be empty";
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return 1;
fi
done
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local -n ptr=$1
if [ -z "$ptr" ]; then
# if ptr has no value yet, ask user for input!
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local -n MENU_OPTIONS=$3
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local tmp=$(dialog --stdout --checklist "$2" 0 0 0 ${MENU_OPTIONS}) || {
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echo "Error during menu selection!"
exit 1
}
clear
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# Result of dialog is space separated list
# Store this as an array
readarray -d " " -t ptr <<<"$tmp"
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fi
}
function get_user_input() {
# return: the following variables:
# BIOS_TYPE (uefi or bios)
# KERNEL (linux or linux-lts)
# FS (BTRFS, EXT4, F2FS)
# HOSTNAME
# USERNAME, USER_PWD
# LUKS_PWD
get_block_devices_with_size || return $?
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get_single_choice TARGET_BLOCK_DEVICE "Select target device for installation" BLOCK_DEVICE_SIZES || return $?
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TMP1="uefi Newer-mainboards bios Legacy-BIOS-on-older-mainboards"
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get_single_choice BIOS_TYPE "Select your bios type" TMP1 || return $?
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TMP1="linux-lts Long-Time-Stable-Linux-kernel linux Latest-Linux-kernel"
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get_single_choice KERNEL "Select kernel version" TMP1 || return $?
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TMP1="BTRFS allows-snapshots-and-dynamic-extension-of-the-fs EXT4 default-fs-of-many-distributions F2FS Flash-Friendly-fs-for-SSD-or-NVMe"
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get_single_choice FS "Select filesystem to use" TMP1 || return $?
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get_text_input HOSTNAME "Enter hostname:" || return $?
get_text_input USERNAME "Enter username:" || return $?
if [ -z "${USER_PWD}" ]; then
get_text_input USER_PWD "Enter a user password:" || return $?
get_text_input USER_PWD2 "Please enter the password again:" || return $?
[[ "${USER_PWD}" == "${USER_PWD2}" ]] || {
echo "Passwords did not match";
exit 1;
}
fi
if [ -z "${LUKS_PWD}" ]; then
get_text_input LUKS_PWD "Enter a disk encryption password:" || return $?
get_text_input LUKS_PWD2 "Please enter the password again:" || return $?
[[ "${LUKS_PWD}" == "${LUKS_PWD2}" ]] || {
echo "Passwords did not match";
exit 1;
}
fi
}
function get_cpu_vendor() {
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# return: the following variables:
# CPU_VENDOR ("amd", "intel", "none")
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if [ -z "${CPU_VENDOR}" ]; then
# if CPU_VENDOR has no value yet, ask user for input!
local vendor_id
vendor_id=$(cat /proc/cpuinfo | grep vendor_id | head -1 | sed 's|vendor_id\s*:\s*||')
if [ "$vendor_id" = "AuthenticAMD" ]; then
CPU_VENDOR="amd"
elif [ "$vendor_id" = "GenuineIntel" ]; then
CPU_VENDOR="intel"
else
echo "Unknown CPU vendor: $vendor_id"
return 1
fi
fi
}
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function get_default_mount_options() {
# return: the following variables:
# FS_DEFAULT_MOUNT_OPTIONS (array)
FS_DEFAULT_MOUNT_OPTIONS=()
case "${FS}" in
BTRFS)
# compress=lzo: archwiki -> Btrfs#Compression
# "Enable compression (better performance, longer flash lifespan)"
FS_DEFAULT_MOUNT_OPTIONS+=('compress=lzo')
;;
EXT4)
# https://wiki.archlinux.org/index.php/Ext4#Enabling_metadata_checksums
# If the CPU supports SSE 4.2, make sure the crc32c_intel kernel module is loaded (TODO)
FS_DEFAULT_MOUNT_OPTIONS+=('metadata_csum')
;;
F2FS)
# When mounting the filesystem, specify compress_algorithm=(lzo|lz4|zstd|lzo-rle).
# Using compress_extension=txt will cause all txt files to be compressed by default.
FS_DEFAULT_MOUNT_OPTIONS+=('compress_algorithm=lz4')
;;
*)
echo "Filesystem $FS not yet supported!"
return 1
;;
esac
}
function choose_mount_options() {
# return: the following variables:
# FS_MOUNT_OPTIONS (array)
case "${FS}" in
BTRFS)
# noatime, nodiratime:
# - The atime options do impact drive performance;
# - noatime implies nodiratime, one does not need to specify both;
# - The noatime option fully disables writing file access times to the drive every time you read a file.
# This works well for almost all applications, except for those that need to know if a file has been
# read since the last time it was modified.
TMP1="noatime Don't-write-file/folder-access-times off ssd Only-enable-when-on-ssd-or-nvme off"
;;
EXT4)
TMP1="noatime Don't-write-file/folder-access-times off"
;;
F2FS)
TMP1="noatime Don't-write-file/folder-access-times off"
;;
*)
echo "Filesystem $FS not yet supported!"
return 1
;;
esac
get_multi_choice FS_MOUNT_OPTIONS "Select mount options" TMP1 || return $?
# TODO: test FS_MOUNT_OPTIONS
echo "${FS_MOUNT_OPTIONS[@]}"
echo "${#FS_MOUNT_OPTIONS[@]}"
for i in "${FS_MOUNT_OPTIONS[@]}"; do
echo "<<$i>>"
done
}
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function main() {
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check_network || return $?
get_user_input || return $?
get_cpu_vendor || return $?
get_default_mount_options || return $?
choose_mount_options || return $?
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}
main "$@"