90 lines
2.5 KiB
Nix
90 lines
2.5 KiB
Nix
{ config, lib, sane-lib, ... }:
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let
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inherit (builtins) attrValues;
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inherit (lib) count mapAttrs' mapAttrsToList mkIf mkMerge mkOption types;
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sane-user-cfg = config.sane.user;
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cfg = config.sane.users;
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path-lib = sane-lib.path;
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userOptions = {
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options = {
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fs = mkOption {
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type = types.attrs;
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default = {};
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description = ''
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entries to pass onto `sane.fs` after prepending the user's home-dir to the path.
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e.g. `sane.users.colin.fs."/.config/aerc" = X`
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=> `sane.fs."/home/colin/.config/aerc" = X;
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'';
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};
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};
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};
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userModule = types.submodule ({ config, ... }: {
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options = {
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inherit (userOptions) fs;
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default = mkOption {
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type = types.bool;
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default = false;
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description = ''
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only one default user may exist.
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this option determines what the `sane.user` shorthand evaluates to.
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'';
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};
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};
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# if we're the default user, inherit whatever settings were routed to the default user
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config = mkIf config.default sane-user-cfg;
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});
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processUser = user: defn: {
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sane.fs = mapAttrs' (path: value: {
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# TODO: query the user's home dir!
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name = path-lib.concat [ "/home/${user}" path ];
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inherit value;
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}) defn.fs;
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};
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in
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{
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options = {
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sane.users = mkOption {
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type = types.attrsOf userModule;
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default = {};
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description = ''
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options to apply to the given user.
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the user is expected to be created externally.
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configs applied at this level are simply transformed and then merged
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into the toplevel `sane` options. it's merely a shorthand.
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'';
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};
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sane.user = mkOption {
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type = types.nullOr (types.submodule userOptions);
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default = null;
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description = ''
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options to pass down to the default user
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'';
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};
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};
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config =
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let
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configs = mapAttrsToList processUser cfg;
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num-default-users = count (u: u.default) (attrValues cfg);
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take = f: {
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sane.fs = f.sane.fs;
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};
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in mkMerge [
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(take (sane-lib.mkTypedMerge take configs))
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{
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assertions = [
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{
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assertion = sane-user-cfg == null || num-default-users != 0;
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message = "cannot set `sane.user` without first setting `sane.users.<user>.default = true` for some user";
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}
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{
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assertion = num-default-users <= 1;
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message = "cannot set more than one default user";
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}
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];
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}
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];
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}
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