mirror of
https://github.com/nix-community/disko.git
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165 lines
5.4 KiB
Nix
165 lines
5.4 KiB
Nix
{ config, options, diskoLib, lib, rootMountPoint, parent, device, ... }:
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{
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options = {
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type = lib.mkOption {
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type = lib.types.enum [ "btrfs" ];
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internal = true;
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description = "Type";
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};
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device = lib.mkOption {
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type = lib.types.str;
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default = device;
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description = "Device to use";
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};
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extraArgs = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ ];
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description = "Extra arguments";
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};
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mountOptions = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ "defaults" ];
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description = "A list of options to pass to mount.";
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};
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subvolumes = lib.mkOption {
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type = lib.types.attrsOf (lib.types.submodule ({ config, ... }: {
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options = {
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name = lib.mkOption {
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type = lib.types.str;
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default = config._module.args.name;
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description = "Name of the BTRFS subvolume.";
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};
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type = lib.mkOption {
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type = lib.types.enum [ "btrfs_subvol" ];
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default = "btrfs_subvol";
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internal = true;
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description = "Type";
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};
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extraArgs = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ ];
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description = "Extra arguments";
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};
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mountOptions = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ "defaults" ];
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description = "Options to pass to mount";
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};
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mountpoint = lib.mkOption {
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type = lib.types.nullOr diskoLib.optionTypes.absolute-pathname;
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default = null;
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description = "Location to mount the subvolume to.";
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};
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};
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}));
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default = { };
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description = "Subvolumes to define for BTRFS.";
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};
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mountpoint = lib.mkOption {
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type = lib.types.nullOr diskoLib.optionTypes.absolute-pathname;
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default = null;
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description = "A path to mount the BTRFS filesystem to.";
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};
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_parent = lib.mkOption {
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internal = true;
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default = parent;
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};
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_meta = lib.mkOption {
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internal = true;
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readOnly = true;
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type = lib.types.functionTo diskoLib.jsonType;
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default = dev: { };
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description = "Metadata";
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};
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_create = diskoLib.mkCreateOption {
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inherit config options;
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default = ''
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mkfs.btrfs ${config.device} ${toString config.extraArgs}
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${lib.concatMapStrings (subvol: ''
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(
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MNTPOINT=$(mktemp -d)
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mount ${config.device} "$MNTPOINT" -o subvol=/
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trap 'umount $MNTPOINT; rm -rf $MNTPOINT' EXIT
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btrfs subvolume create "$MNTPOINT"/${subvol.name} ${toString subvol.extraArgs}
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)
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'') (lib.attrValues config.subvolumes)}
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'';
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};
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_mount = diskoLib.mkMountOption {
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inherit config options;
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default =
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let
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subvolMounts = lib.concatMapAttrs
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(_: subvol:
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let
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mountpoint =
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if (subvol.mountpoint != null) then subvol.mountpoint
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else if (config.mountpoint == null) then subvol.name
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else null;
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in
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lib.optionalAttrs (mountpoint != null) {
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${mountpoint} = ''
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if ! findmnt ${config.device} "${rootMountPoint}${mountpoint}" > /dev/null 2>&1; then
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mount ${config.device} "${rootMountPoint}${mountpoint}" \
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${lib.concatMapStringsSep " " (opt: "-o ${opt}") (subvol.mountOptions ++ [ "subvol=${subvol.name}" ])} \
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-o X-mount.mkdir
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fi
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'';
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}
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)
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config.subvolumes;
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in
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{
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fs = subvolMounts // lib.optionalAttrs (config.mountpoint != null) {
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${config.mountpoint} = ''
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if ! findmnt ${config.device} "${rootMountPoint}${config.mountpoint}" > /dev/null 2>&1; then
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mount ${config.device} "${rootMountPoint}${config.mountpoint}" \
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${lib.concatMapStringsSep " " (opt: "-o ${opt}") config.mountOptions} \
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-o X-mount.mkdir
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fi
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'';
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};
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};
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};
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_config = lib.mkOption {
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internal = true;
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readOnly = true;
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default = [
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(map
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(subvol:
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let
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mountpoint =
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if (subvol.mountpoint != null) then subvol.mountpoint
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else if (config.mountpoint == null) then subvol.name
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else null;
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in
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lib.optional (mountpoint != null) {
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fileSystems.${mountpoint} = {
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device = config.device;
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fsType = "btrfs";
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options = subvol.mountOptions ++ [ "subvol=${subvol.name}" ];
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};
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}
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)
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(lib.attrValues config.subvolumes))
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(lib.optional (config.mountpoint != null) {
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fileSystems.${config.mountpoint} = {
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device = config.device;
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fsType = "btrfs";
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options = config.mountOptions;
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};
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})
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];
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description = "NixOS configuration";
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};
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_pkgs = lib.mkOption {
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internal = true;
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readOnly = true;
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type = lib.types.functionTo (lib.types.listOf lib.types.package);
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default = pkgs:
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[ pkgs.btrfs-progs pkgs.coreutils ];
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description = "Packages";
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};
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};
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}
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