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|
{ lib, pkgs, options, config, ... }:
with lib;
{
options = with types; {
wsl.version =
let
versionFile = splitString "\n" (readFile ../VERSION);
in
{
release = mkOption {
internal = true;
description = "the NixOS-WSL release";
type = str;
default = elemAt versionFile 0;
};
rev = mkOption {
internal = true;
description = "the NixOS-WSL git revision";
type = str;
default = elemAt versionFile 1;
};
systemd = mkOption {
internal = true;
type = enum [ "native" "syschdemd" ];
description = "the systemd implementation used by NixOS-WSL";
default = if config.wsl.nativeSystemd then "native" else "syschdemd";
};
};
};
config = mkIf config.wsl.enable {
environment.systemPackages = [
(
with config.wsl.version;
let
opts = options.wsl.version;
maxlen = foldl (acc: opt: max acc (stringLength opt)) 0 ((attrNames opts) ++ [ "help" "json" ]);
rightPad = text: "${text}${fixedWidthString (2 + maxlen - (stringLength text)) " " ""}";
in
pkgs.writeShellScriptBin "nixos-wsl-version" ''
for arg in "$@"; do
case $arg in
--help)
echo "Usage: nixos-wsl-version [option]"
echo "Options:"
echo -e " --${rightPad "help"}Show this help message"
${concatStringsSep "\n" (
mapAttrsToList (option: value: ''
echo " --${rightPad option}Show ${value.description}"
'') opts
)}
echo -e " --${rightPad "json"}Show everything in JSON format"
exit 0
;;
${concatStringsSep "\n" (
mapAttrsToList (option: value: ''
--${option})
echo ${value}
exit 0
;;
'') config.wsl.version
)}
--json)
echo '${generators.toJSON {} config.wsl.version}' | ${pkgs.jq}/bin/jq # Use jq to pretty-print the JSON
exit 0
;;
*)
echo "Unknown argument: $arg"
exit 1
;;
esac
done
echo NixOS-WSL ${config.wsl.version.release} ${config.wsl.version.rev} ${config.wsl.version.systemd}
''
)
];
};
}
|
