forked from mirrors/nixpkgs
29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
48 lines
1.1 KiB
Nix
48 lines
1.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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inInitrd = any (fs: fs == "btrfs") config.boot.initrd.supportedFilesystems;
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in
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{
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config = mkIf (any (fs: fs == "btrfs") config.boot.supportedFilesystems) {
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system.fsPackages = [ pkgs.btrfsProgs ];
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boot.initrd.kernelModules = mkIf inInitrd [ "btrfs" "crc32c" ];
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boot.initrd.extraUtilsCommands = mkIf inInitrd
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''
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mkdir -p $out/bin
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cp -v ${pkgs.btrfsProgs}/bin/btrfs $out/bin
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ln -sv btrfs $out/bin/btrfsck
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ln -sv btrfsck $out/bin/fsck.btrfs
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# !!! Increases uncompressed initrd by 240k
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cp -pv ${pkgs.zlib}/lib/libz.so* $out/lib
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cp -pv ${pkgs.lzo}/lib/liblzo2.so* $out/lib
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'';
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boot.initrd.extraUtilsCommandsTest = mkIf inInitrd
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''
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$out/bin/btrfs --version
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'';
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boot.initrd.postDeviceCommands = mkIf inInitrd
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''
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btrfs device scan
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'';
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# !!! This is broken. There should be a udev rule to do this when
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# new devices are discovered.
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jobs.udev.postStart =
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''
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${pkgs.btrfsProgs}/bin/btrfs device scan
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'';
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};
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}
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