117 lines
3.2 KiB
Nix
117 lines
3.2 KiB
Nix
{ lib, config, ... }:
|
|
|
|
with lib;
|
|
let
|
|
mergeFalseByDefault = locs: defs:
|
|
if defs == [] then abort "This case should never happen."
|
|
else if any (x: x == false) (getValues defs) then false
|
|
else true;
|
|
|
|
kernelItem = types.submodule {
|
|
options = {
|
|
tristate = mkOption {
|
|
type = types.enum [ "y" "m" "n" null ];
|
|
default = null;
|
|
internal = true;
|
|
visible = true;
|
|
description = lib.mdDoc ''
|
|
Use this field for tristate kernel options expecting a "y" or "m" or "n".
|
|
'';
|
|
};
|
|
|
|
freeform = mkOption {
|
|
type = types.nullOr types.str // {
|
|
merge = mergeEqualOption;
|
|
};
|
|
default = null;
|
|
example = ''MMC_BLOCK_MINORS.freeform = "32";'';
|
|
description = lib.mdDoc ''
|
|
Freeform description of a kernel configuration item value.
|
|
'';
|
|
};
|
|
|
|
optional = mkOption {
|
|
type = types.bool // { merge = mergeFalseByDefault; };
|
|
default = false;
|
|
description = lib.mdDoc ''
|
|
Whether option should generate a failure when unused.
|
|
Upon merging values, mandatory wins over optional.
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
|
|
mkValue = with lib; val:
|
|
let
|
|
isNumber = c: elem c ["0" "1" "2" "3" "4" "5" "6" "7" "8" "9"];
|
|
|
|
in
|
|
if (val == "") then "\"\""
|
|
else if val == "y" || val == "m" || val == "n" then val
|
|
else if all isNumber (stringToCharacters val) then val
|
|
else if substring 0 2 val == "0x" then val
|
|
else val; # FIXME: fix quoting one day
|
|
|
|
|
|
# generate nix intermediate kernel config file of the form
|
|
#
|
|
# VIRTIO_MMIO m
|
|
# VIRTIO_BLK y
|
|
# VIRTIO_CONSOLE n
|
|
# NET_9P_VIRTIO? y
|
|
#
|
|
# Borrowed from copumpkin https://github.com/NixOS/nixpkgs/pull/12158
|
|
# returns a string, expr should be an attribute set
|
|
# Use mkValuePreprocess to preprocess option values, aka mark 'modules' as 'yes' or vice-versa
|
|
# use the identity if you don't want to override the configured values
|
|
generateNixKConf = exprs:
|
|
let
|
|
mkConfigLine = key: item:
|
|
let
|
|
val = if item.freeform != null then item.freeform else item.tristate;
|
|
in
|
|
if val == null
|
|
then ""
|
|
else if (item.optional)
|
|
then "${key}? ${mkValue val}\n"
|
|
else "${key} ${mkValue val}\n";
|
|
|
|
mkConf = cfg: concatStrings (mapAttrsToList mkConfigLine cfg);
|
|
in mkConf exprs;
|
|
|
|
in
|
|
{
|
|
|
|
options = {
|
|
|
|
intermediateNixConfig = mkOption {
|
|
readOnly = true;
|
|
type = types.lines;
|
|
example = ''
|
|
USB? y
|
|
DEBUG n
|
|
'';
|
|
description = lib.mdDoc ''
|
|
The result of converting the structured kernel configuration in settings
|
|
to an intermediate string that can be parsed by generate-config.pl to
|
|
answer the kernel `make defconfig`.
|
|
'';
|
|
};
|
|
|
|
settings = mkOption {
|
|
type = types.attrsOf kernelItem;
|
|
example = literalExpression '' with lib.kernel; {
|
|
"9P_NET" = yes;
|
|
USB = option yes;
|
|
MMC_BLOCK_MINORS = freeform "32";
|
|
}'';
|
|
description = lib.mdDoc ''
|
|
Structured kernel configuration.
|
|
'';
|
|
};
|
|
};
|
|
|
|
config = {
|
|
intermediateNixConfig = generateNixKConf config.settings;
|
|
};
|
|
}
|