From eca1957835ca7c6c14e9c9217e620b62ef643203 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Mon, 23 Jan 2023 10:49:01 +0100
Subject: [PATCH 1/2] vendorize bcachefs kernel

---
 flake.nix                  |  5 +++++
 linux-testing-bcachefs.nix | 28 ++++++++++++++++++++++++++++
 tests/bcachefs.nix         | 10 ++++++++--
 3 files changed, 41 insertions(+), 2 deletions(-)
 create mode 100644 linux-testing-bcachefs.nix

diff --git a/flake.nix b/flake.nix
index 51eef2c..1f1ecfd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -24,6 +24,11 @@
       disko = pkgs.callPackage ./package.nix {};
       disko-doc = pkgs.callPackage ./doc.nix { };
       default = self.packages.${system}.disko;
+      # The way bcachefs support is maintained in nixpkgs is prone to breakage.
+      # That's why we need to maintain a fork here:
+      # https://github.com/NixOS/nixpkgs/issues/212086
+      linux-bcachefs = pkgs.callPackage ./linux-testing-bcachefs.nix {};
+      linuxPackages_bcachefs = pkgs.linuxPackagesFor self.packages.${pkgs.system}.linux-bcachefs;
     });
     # TODO: disable bios-related tests on aarch64...
     # Run checks: nix flake check -L
diff --git a/linux-testing-bcachefs.nix b/linux-testing-bcachefs.nix
new file mode 100644
index 0000000..12529f9
--- /dev/null
+++ b/linux-testing-bcachefs.nix
@@ -0,0 +1,28 @@
+# nixpkgs's variant is broken because they have non-applying patches on top of the latest kernel,
+# instead of using kernel.
+
+{ lib
+, buildLinux
+, fetchFromGitHub
+, ...
+} @ args:
+buildLinux (args // {
+  # NOTE: bcachefs-tools should be updated simultaneously to preserve compatibility
+  version = "6.1.0-2022-12-29";
+  modDirVersion = "6.1.0";
+
+  src = fetchFromGitHub {
+    owner = "koverstreet";
+    repo = "bcachefs";
+    rev = "8f064a4cb5c7cce289b83d7a459e6d8620188b37";
+    sha256 = "sha256-UgWAbYToauAjGrgeS+o6N42/oW0roICJIoJlEAHBRPk=";
+  };
+
+  kernelPatches = (args.kernelPatches or []) ++ [{
+    name = "bcachefs-config";
+    patch = null;
+    extraConfig = ''
+      BCACHEFS_FS m
+    '';
+  }];
+} // (args.argsOverride or {}))
diff --git a/tests/bcachefs.nix b/tests/bcachefs.nix
index 58ca8d3..d78d870 100644
--- a/tests/bcachefs.nix
+++ b/tests/bcachefs.nix
@@ -1,6 +1,9 @@
 { pkgs ? (import <nixpkgs> { })
 , makeDiskoTest ? (pkgs.callPackage ./lib.nix { }).makeDiskoTest
 }:
+let
+  linux-bcachefs = pkgs.callPackage ../linux-testing-bcachefs.nix {};
+in
 makeDiskoTest {
   disko-config = ../example/bcachefs.nix;
   extraTestScript = ''
@@ -12,7 +15,10 @@ makeDiskoTest {
     boot.supportedFilesystems = [ "bcachefs" ];
     # disable zfs so we can support latest kernel
     nixpkgs.overlays = [(final: super: {
-      zfs = super.zfs.overrideAttrs(_: {meta.platforms = [];});}
-    )];
+      zfs = super.zfs.overrideAttrs(_: {
+        meta.platforms = [];
+      });
+    })];
+    boot.kernelPackages = pkgs.lib.mkForce (pkgs.recurseIntoAttrs (pkgs.linuxPackagesFor linux-bcachefs));
   };
 }

From 232aed177d049ef5861b18b8c92fabba1e59b772 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]" <github-actions[bot]@users.noreply.github.com>
Date: Mon, 23 Jan 2023 08:30:15 +0000
Subject: [PATCH 2/2] flake.lock: Update
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/37b97ae3dd714de9a17923d004a2c5b5543dfa6d' (2023-01-13)
  → 'github:NixOS/nixpkgs/cfb43ad7b941d9c3606fb35d91228da7ebddbfc5' (2023-01-20)
---
 flake.lock | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/flake.lock b/flake.lock
index fafd04a..112f96a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1673606088,
-        "narHash": "sha256-wdYD41UwNwPhTdMaG0AIe7fE1bAdyHe6bB4HLUqUvck=",
+        "lastModified": 1674236650,
+        "narHash": "sha256-B4GKL1YdJnII6DQNNJ4wDW1ySJVx2suB1h/v4Ql8J0Q=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "37b97ae3dd714de9a17923d004a2c5b5543dfa6d",
+        "rev": "cfb43ad7b941d9c3606fb35d91228da7ebddbfc5",
         "type": "github"
       },
       "original": {