forked from extern/nixos-installer
dd8fc696f4
further improve scripting robustness, add fs.disks.devices.partitionDuringInstallation, ad fs.zfs.datasets.*.recursiveProps, add deploy-system-to-hetzner-vps install script
45 lines
2.1 KiB
Markdown
45 lines
2.1 KiB
Markdown
/*
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# FS Nixpkgs "Patches"
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Filesystem related "patches" of options in nixpkgs, i.e. additions of options that are *not* prefixed.
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## Implementation
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```nix
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#*/# end of MarkDown, beginning of NixOS module:
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dirname: inputs: specialArgs@{ config, pkgs, lib, utils, ... }: let inherit (inputs.self) lib; in let
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in {
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options = {
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fileSystems = lib.mkOption { type = lib.types.attrsOf (lib.types.submodule [ { options = {
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preMountCommands = lib.mkOption { description = ''
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Commands to be run as root every time before mounting this filesystem, but after all its dependents were mounted (TODO: or does this run just once per boot?).
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This does not order itself before or after `systemd-fsck@''${utils.escapeSystemdPath device}.service`.
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Note that if a symlink exists at a mount point when systemd's fstab-generator runs, it will read/resolve the symlink and use that as the mount point, resulting in mismatching unit names for that mount, effectively disabling its `preMountCommands`.
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''; type = lib.types.lines; default = ""; };
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}; } ]);
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}; };
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config = let
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in ({
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# The implementation is derived from the "mkfs-${device'}" service in nixpkgs.
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systemd.services = lib.wip.mapMergeUnique (_: { mountPoint, device, preMountCommands, depends, ... }: if (preMountCommands != "") then let
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isDevice = lib.wip.startsWith "/dev/" device;
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mountPoint' = utils.escapeSystemdPath mountPoint;
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device' = utils.escapeSystemdPath device;
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in { "pre-mount-${mountPoint'}" = {
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description = "Prepare mounting ${device} at ${mountPoint}";
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wantedBy = [ "${mountPoint'}.mount" ]; before = [ "${mountPoint'}.mount" ];
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requires = lib.optional isDevice "${device'}.device"; after = lib.optional isDevice "${device'}.device";
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unitConfig.RequiresMountsFor = depends ++ [ (builtins.dirOf device) (builtins.dirOf mountPoint) ];
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unitConfig.DefaultDependencies = false;
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serviceConfig.Type = "oneshot"; script = preMountCommands;
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}; } else { }) config.fileSystems;
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});
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}
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