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ext4fs.nix (884B)

      1 {
      2   config,
      3   pkgs,
      4   lib,
      5   ...
      6 }:
      7 let
      8   inherit (lib) mkIf;
      9   o = config.system.outputs;
     10 in
     11 {
     12   imports = [
     13     ./initramfs.nix
     14   ];
     15   config = mkIf (config.rootfsType == "ext4") {
     16     kernel.config = {
     17       EXT4_FS = "y";
     18       EXT4_USE_FOR_EXT2 = "y";
     19       FS_ENCRYPTION = "y";
     20     };
     21     boot.initramfs.enable = true;
     22     system.outputs = {
     23       rootfs =
     24         let
     25           inherit (pkgs.pkgsBuildBuild) runCommand e2fsprogs;
     26         in
     27         runCommand "mkfs.ext4"
     28           {
     29             depsBuildBuild = [ e2fsprogs ];
     30           }
     31           ''
     32             tree=${o.bootablerootdir}
     33             size=$(du -s --apparent-size --block-size 1024 $tree |cut -f1)
     34             # add 25% for filesystem overhead
     35             size=$(( 5 * $size / 4))
     36             dd if=/dev/zero of=$out bs=1024 count=$size
     37             mke2fs -t ext4 -j -d $tree $out
     38           '';
     39     };
     40   };
     41 }