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users: ensure uniqueness of gid/uid entries

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Instead of a cryptic error during activation conflicting ids are now
caught during evaluation.

    error: The option `users.uids.30001' has conflicting definitions
This commit is contained in:
Daiderd Jordan 2020-02-11 16:41:40 +01:00
parent 590e9c872a
commit 3d50598ae0
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GPG key ID: D02435D05B810C96
1 changed files with 22 additions and 2 deletions
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24
modules/users/default.nix
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@ -9,12 +9,17 @@ let
user = import ./user.nix;
toArguments = concatMapStringsSep " " (v: "'${v}'");
toGID = v: { "${toString v.gid}" = v.name; };
toUID = v: { "${toString v.uid}" = v.name; };
isCreated = list: name: elem name list;
isDeleted = attrs: name: ! elem name (mapAttrsToList (n: v: v.name) attrs);
createdGroups = mapAttrsToList (n: v: v) (filterAttrs (n: v: isCreated cfg.knownGroups v.name) cfg.groups);
createdUsers = mapAttrsToList (n: v: v) (filterAttrs (n: v: isCreated cfg.knownUsers v.name) cfg.users);
gids = mapAttrsToList (n: toGID) (filterAttrs (n: v: isCreated cfg.knownGroups v.name) cfg.groups);
uids = mapAttrsToList (n: toUID) (filterAttrs (n: v: isCreated cfg.knownUsers v.name) cfg.users);
createdGroups = mapAttrsToList (n: v: cfg.groups."${v}") cfg.gids;
createdUsers = mapAttrsToList (n: v: cfg.users."${v}") cfg.uids;
deletedGroups = filter (n: isDeleted cfg.groups n) cfg.knownGroups;
deletedUsers = filter (n: isDeleted cfg.users n) cfg.knownUsers;
@ -55,6 +60,18 @@ in
description = "Configuration for users.";
};
users.gids = mkOption {
internal = true;
type = types.attrsOf types.str;
default = {};
};
users.uids = mkOption {
internal = true;
type = types.attrsOf types.str;
default = {};
};
users.forceRecreate = mkOption {
internal = true;
type = types.bool;
@ -65,6 +82,9 @@ in
config = {
users.gids = mkMerge gids;
users.uids = mkMerge uids;
system.activationScripts.groups.text = mkIf (cfg.knownGroups != []) ''
echo "setting up groups..." >&2