first steps

.env

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+_SYS_DEV=sda
+_HEADER_DEV=sdb
+_EFI_SIZE=1024M
+_SWAP_SIZE=2048M

0.info.sh

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+#!/bin/bash
+
+lsblk -o NAME,SIZE,TYPE,MODEL,TRAN

0_.test.sh

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+#!/bin/bash
+
+source .env
+
+echo ${_SYS_DEV}22

1.disks.sh

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+#!/bin/bash
+
+source .env
+
+echo $_EFI_SIZE
+sgdisk --zap-all /dev/$_SYS_DEV
+sgdisk -n 1:0:+$_EFI_SIZE -t 1:ef00 -c 1:"EFI" /dev/$_SYS_DEV
+sgdisk -n 2:0:+$_SWAP_SIZE -t 2:8200 -c 2:"SWAP" /dev/$_SYS_DEV
+sgdisk -n 3:0:0 -t 3:8309 -c 3:"LUKS-Data" /dev/$_SYS_DEV
+sgdisk -p /dev/$_SYS_DEV
+
+dd if=/dev/zero of=/dev/$_HEADER_DEV bs=512 count=32768 status=progress
+cryptsetup luksFormat --type luks2 --header /dev/$_HEADER_DEV /dev/${_SYS_DEV}3
+cryptsetup open /dev/${_SYS_DEV}3 --header /dev/$_HEADER_DEV cryptroot
+ls /dev/mapper/cryptroot

2.0.fs-init.sh

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+#!/bin/bash
+
+source .env
+
+mkfs.btrfs -L arch /dev/mapper/cryptroot
+mkfs.fat -F 32 /dev/${_SYS_DEV}1
+
+mount /dev/mapper/cryptroot /mnt
+cd /mnt
+btrfs subvolume create @
+btrfs subvolume create @home
+btrfs subvolume create @snapshots
+btrfs subvolume create @var
+btrfs subvolume create @var_log
+btrfs subvolume create @var_cache
+cd /
+umount /mnt
+
+mount -o defaults,noatime,compress=zstd,ssd,space_cache=v2,autodefrag,subvol=@ /dev/mapper/cryptroot /mnt
+mkdir -p /mnt/{home,var,tmp,boot,snapshots}
+mount -o defaults,noatime,compress=zstd,ssd,space_cache=v2,autodefrag,subvol=@home /dev/mapper/cryptroot /mnt/home
+mount -o defaults,noatime,compress=zstd,space_cache=v2,subvol=@snapshots /dev/mapper/cryptroot /mnt/snapshots
+mount -o defaults,noatime,space_cache=v2,subvol=@var /dev/mapper/cryptroot /mnt/var
+mkdir -p /mnt/var/{log,cache}
+mount -o defaults,noatime,space_cache=v2,nodatacow,subvol=@var_log /dev/mapper/cryptroot /mnt/var/log
+mount -o defaults,noatime,space_cache=v2,nodatacow,subvol=@var_cache /dev/mapper/cryptroot /mnt/var/cache
+mount -o fmask=0077,dmask=0077 /dev/${_SYS_DEV}1 /mnt/boot
+
+mkswap /dev/${_SYS_DEV}2
+swapon /dev/${_SYS_DEV}2

2.1.fs-mount.sh

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+#!/bin/bash
+
+source .env
+
+cd /
+mount -o defaults,noatime,compress=zstd,ssd,space_cache=v2,autodefrag,subvol=@ /dev/mapper/cryptroot /mnt
+mount -o defaults,noatime,compress=zstd,ssd,space_cache=v2,autodefrag,subvol=@home /dev/mapper/cryptroot /mnt/home
+mount -o defaults,noatime,compress=zstd,space_cache=v2,subvol=@snapshots /dev/mapper/cryptroot /mnt/snapshots
+mount -o defaults,noatime,space_cache=v2,subvol=@var /dev/mapper/cryptroot /mnt/var
+mount -o defaults,noatime,space_cache=v2,nodatacow,subvol=@var_log /dev/mapper/cryptroot /mnt/var/log
+mount -o defaults,noatime,space_cache=v2,nodatacow,subvol=@var_cache /dev/mapper/cryptroot /mnt/var/cache
+mount -o fmask=0077,dmask=0077 /dev/${_SYS_DEV}1 /mnt/boot
+
+mkswap /dev/${_SYS_DEV}2
+swapon /dev/${_SYS_DEV}2