From 23160383e3d499fea96ff0feeb918e3c65a44d44 Mon Sep 17 00:00:00 2001
From: aszlig <aszlig@redmoonstudios.org>
Date: Wed, 22 Oct 2014 01:50:15 +0200
Subject: [PATCH] nixos: Add a filesystem module for JFS.

I'm not using JFS, but this is to mainly make jfsutils available if you
have defined a JFS filesystem in your configuration.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
---
 nixos/modules/module-list.nix           |  1 +
 nixos/modules/tasks/filesystems/jfs.nix | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 nixos/modules/tasks/filesystems/jfs.nix

diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 17d3140b087..d65691c4379 100755
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -364,6 +364,7 @@
   ./tasks/filesystems/cifs.nix
   ./tasks/filesystems/ext.nix
   ./tasks/filesystems/f2fs.nix
+  ./tasks/filesystems/jfs.nix
   ./tasks/filesystems/nfs.nix
   ./tasks/filesystems/reiserfs.nix
   ./tasks/filesystems/unionfs-fuse.nix
diff --git a/nixos/modules/tasks/filesystems/jfs.nix b/nixos/modules/tasks/filesystems/jfs.nix
new file mode 100644
index 00000000000..b7091ce9b18
--- /dev/null
+++ b/nixos/modules/tasks/filesystems/jfs.nix
@@ -0,0 +1,19 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  inInitrd = any (fs: fs == "jfs") config.boot.initrd.supportedFilesystems;
+in
+{
+  config = mkIf (any (fs: fs == "jfs") config.boot.supportedFilesystems) {
+
+    system.fsPackages = [ pkgs.jfsutils ];
+
+    boot.initrd.kernelModules = mkIf inInitrd [ "jfs" ];
+
+    boot.initrd.extraUtilsCommands = mkIf inInitrd ''
+      cp -v ${pkgs.jfsutils}/sbin/fsck.jfs "$out/bin/"
+    '';
+  };
+}