home-manager/modules/misc/xdg.nix

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{ options, config, lib, pkgs, ... }:
with lib;
let
cfg = config.xdg;
fileType = (import ../lib/file-type.nix {
inherit (config.home) homeDirectory;
inherit lib pkgs;
}).fileType;
defaultCacheHome = "${config.home.homeDirectory}/.cache";
defaultConfigHome = "${config.home.homeDirectory}/.config";
defaultDataHome = "${config.home.homeDirectory}/.local/share";
getEnvFallback = name: fallback:
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let value = builtins.getEnv name;
in if value != "" then value else fallback;
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in {
options.xdg = {
enable = mkEnableOption "management of XDG base directories";
cacheHome = mkOption {
type = types.path;
defaultText = "~/.cache";
apply = toString;
description = ''
Absolute path to directory holding application caches.
'';
};
configFile = mkOption {
type = fileType "<varname>xdg.configHome</varname>" cfg.configHome;
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default = { };
description = ''
Attribute set of files to link into the user's XDG
configuration home.
'';
};
configHome = mkOption {
type = types.path;
defaultText = "~/.config";
apply = toString;
description = ''
Absolute path to directory holding application configurations.
'';
};
dataFile = mkOption {
type = fileType "<varname>xdg.dataHome</varname>" cfg.dataHome;
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default = { };
description = ''
Attribute set of files to link into the user's XDG
data home.
'';
};
dataHome = mkOption {
type = types.path;
defaultText = "~/.local/share";
apply = toString;
description = ''
Absolute path to directory holding application data.
'';
};
};
config = mkMerge [
(mkIf cfg.enable {
xdg.cacheHome = mkDefault defaultCacheHome;
xdg.configHome = mkDefault defaultConfigHome;
xdg.dataHome = mkDefault defaultDataHome;
home.sessionVariables = {
XDG_CACHE_HOME = cfg.cacheHome;
XDG_CONFIG_HOME = cfg.configHome;
XDG_DATA_HOME = cfg.dataHome;
};
})
# Legacy non-deterministic setup.
(mkIf (!cfg.enable && versionOlder config.home.stateVersion "20.09") {
xdg.cacheHome =
mkDefault (getEnvFallback "XDG_CACHE_HOME" defaultCacheHome);
xdg.configHome =
mkDefault (getEnvFallback "XDG_CONFIG_HOME" defaultConfigHome);
xdg.dataHome = mkDefault (getEnvFallback "XDG_DATA_HOME" defaultDataHome);
})
# "Modern" deterministic setup.
(mkIf (!cfg.enable && versionAtLeast config.home.stateVersion "20.09") {
xdg.cacheHome = mkDefault defaultCacheHome;
xdg.configHome = mkDefault defaultConfigHome;
xdg.dataHome = mkDefault defaultDataHome;
})
{
home.file = mkMerge [
(mapAttrs' (name: file: nameValuePair "${cfg.configHome}/${name}" file)
cfg.configFile)
(mapAttrs' (name: file: nameValuePair "${cfg.dataHome}/${name}" file)
cfg.dataFile)
{ "${cfg.cacheHome}/.keep".text = ""; }
];
}
];
}