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nullmailer: add remotesFile option

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The current `remotes` option is a string option containing nullmailer remote
definitions. However, those definitions may contain secret credentials and
should therefore not be put world-readable in the nix store.

I added a `remotesFile` option, which allows to specify a path to the remotes
definition file instead. This way, the definitions can be kept outside of the
nix store with more secure file permissions.
This commit is contained in:
Marius Bergmann 2017-09-28 08:38:59 +02:00
parent 02e89de71c
commit e741cc4881
1 changed files with 28 additions and 2 deletions
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30
nixos/modules/services/mail/nullmailer.nix
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@ -35,6 +35,18 @@ with lib;
description = "Whether to set the system sendmail to nullmailer's.";
};
remotesFile = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
Path to the <code>remotes</code> control file. This file contains a
list of remote servers to which to send each message.
See <code>man 8 nullmailer-send</code> for syntax and available
options.
'';
};
config = {
adminaddr = mkOption {
type = types.nullOr types.str;
@ -173,13 +185,27 @@ with lib;
cfg = config.services.nullmailer;
in mkIf cfg.enable {
assertions = [
{ assertion = cfg.config.remotes == null || cfg.remotesFile == null;
message = "Only one of `remotesFile` or `config.remotes` may be used at a time.";
}
];
environment = {
systemPackages = [ pkgs.nullmailer ];
etc = let
getval = attr: builtins.getAttr attr cfg.config;
attrs = builtins.attrNames cfg.config;
attrs' = builtins.filter (attr: ! isNull (getval attr)) attrs;
in foldl' (as: attr: as // { "nullmailer/${attr}".text = getval attr; }) {} attrs';
remotesFilter = if cfg.remotesFile != null
then (attr: attr != "remotes")
else (_: true);
optionalRemotesFileLink = if cfg.remotesFile != null
then { "nullmailer/remotes".source = cfg.remotesFile; }
else {};
attrs' = builtins.filter (attr: (! isNull (getval attr)) && (remotesFilter attr)) attrs;
in
(foldl' (as: attr: as // { "nullmailer/${attr}".text = getval attr; }) {} attrs')
// optionalRemotesFileLink;
};
users = {