nixpkgs/nixos/modules/tasks/filesystems/xfs.nix

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{ config, pkgs, ... }:
with pkgs.lib;
let
inInitrd = any (fs: fs == "xfs") config.boot.initrd.supportedFilesystems;
in
{
config = mkIf (any (fs: fs == "xfs") config.boot.supportedFilesystems) {
system.fsPackages = [ pkgs.xfsprogs ];
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boot.initrd.availableKernelModules = mkIf inInitrd [ "xfs" "crc32c" ];
boot.initrd.extraUtilsCommands = mkIf inInitrd
''
cp -v ${pkgs.xfsprogs}/sbin/fsck.xfs $out/bin
'';
# Trick just to set 'sh' after the extraUtils nuke-refs.
boot.initrd.extraUtilsCommandsTest = mkIf inInitrd
''
sed -i -e 's,^#!.*,#!'$out/bin/sh, $out/bin/fsck.xfs
'';
};
}