From 6469447c54fc4c4a0133d3d0529182c03ac32b88 Mon Sep 17 00:00:00 2001
From: Christoph Heiss <christoph@c8h4.io>
Date: Sun, 5 Nov 2023 23:23:21 +0100
Subject: [PATCH] content: nixos-btrfs: Add section about UEFI (+ LUKS)
 installation

Signed-off-by: Christoph Heiss <christoph@c8h4.io>
---
 content/nixos-btrfs.md | 53 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/content/nixos-btrfs.md b/content/nixos-btrfs.md
index 4764696..c5306db 100644
--- a/content/nixos-btrfs.md
+++ b/content/nixos-btrfs.md
@@ -11,7 +11,7 @@ date: 2023-10-14T00:15:29+02:00
 $ fdisk /dev/vdX
 fdisk> o
 fdisk> n
-# enter, enter, enter, enter
+# <enter>, <enter>, <enter>
 # primary partition, number 1, from sector 2048 to end
 fdisk> w
 ```
@@ -45,6 +45,57 @@ $ mount -o noatime,compress=zstd,subvol=@nix /dev/disk/by-uuid/<uuid> /mnt/nix
 $ mount -o noatime,compress=zstd,subvol=@log /dev/disk/by-uuid/<uuid> /mnt/var/log
 ```
 
+## UEFI, ESP + single partition
+
+### first, create a new GPT partition table and two partitions
+
+```shell {lineanchors=list}
+$ fdisk /dev/sdX
+fdisk> g
+fdisk> n
+# <enter>, <enter>, +512M
+# primary partition, number 1, from sector 2048 with size 512MiB
+fdisk> w
+```
+
+### if the root partition should be encrypted
+
+don't forget proper [drive preparation](https://wiki.archlinux.org/title/Dm-crypt/Drive_preparation)!
+
+```shell {lineanchors=list}
+$ cryptsetup -y -v luksFormat /dev/sdX2
+$ cryptsetup open /dev/sdX2 nixos-root
+```
+
+### create the filesystems
+
+```shell {lineanchors=list}
+$ mkfs.vfat -F32 -n nixos-boot /dev/sdX1
+$ mkfs.btrfs -L nixos /dev/sdX2 # or /dev/mapper/nixos-root if encrypted
+```
+
+### create all the subvolumes
+
+```shell {lineanchors=list}
+$ mount /dev/sdX2 /mnt # or /dev/mapper/nixos-root
+$ btrfs subvolume create /mnt/@
+$ btrfs subv cr /mnt/@home
+$ btrfs subv cr /mnt/@nix
+$ btrfs subv cr /mnt/@log
+$ umount /mnt
+```
+
+### Mount Btrfs again, now properly with the subvolumes
+
+```shell {lineanchors=list}
+$ mount -o noatime,subvol=@ /dev/disk/by-uuid/<uuid> /mnt # or /dev/mapper/nixos-root
+$ mkdir -p /mnt/{boot,home,nix,var/log}
+$ mount /dev/disk/by-uuid/<esp-uuid> /mnt/boot
+$ mount -o subvol=@home /dev/disk/by-uuid/<uuid> /mnt/home
+$ mount -o noatime,compress=zstd,subvol=@nix /dev/disk/by-uuid/<uuid> /mnt/nix
+$ mount -o noatime,compress=zstd,subvol=@log /dev/disk/by-uuid/<uuid> /mnt/var/log
+```
+
 ## rest of the installation
 
 ### generate the initial NixOS system config