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{ config, lib, pkgs, options, ... }:
with lib;
let
cfg = config.services.prometheus.exporters.imap-mailstat;
valueToString = value:
if (builtins.typeOf value == "string") then "\"${value}\""
else (
if (builtins.typeOf value == "int") then "${toString value}"
else (
if (builtins.typeOf value == "bool") then (if value then "true" else "false")
else "XXX ${toString value}"
)
);
createConfigFile = accounts:
# unfortunately on toTOML yet
# https://github.com/NixOS/nix/issues/3929
pkgs.writeText "imap-mailstat-exporter.conf" ''
${concatStrings (attrValues (mapAttrs (name: config: "[[Accounts]]\nname = \"${name}\"\n${concatStrings (attrValues (mapAttrs (k: v: "${k} = ${valueToString v}\n") config))}") accounts))}
'';
mkOpt = type: description: mkOption {
type = types.nullOr type;
default = null;
description = lib.mdDoc description;
};
accountOptions.options = {
mailaddress = mkOpt types.str "Your email address (at the moment used as login name)";
username = mkOpt types.str "If empty string mailaddress value is used";
password = mkOpt types.str "";
serveraddress = mkOpt types.str "mailserver name or address";
serverport = mkOpt types.int "imap port number (at the moment only tls connection is supported)";
starttls = mkOpt types.bool "set to true for using STARTTLS to start a TLS connection";
};
in
{
port = 8081;
extraOpts = {
oldestUnseenDate = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
Enable metric with timestamp of oldest unseen mail
'';
};
accounts = mkOption {
type = types.attrsOf (types.submodule accountOptions);
default = {};
description = lib.mdDoc ''
Accounts to monitor
'';
};
configurationFile = mkOption {
type = types.path;
example = "/path/to/config-file";
description = lib.mdDoc ''
File containing the configuration
'';
};
};
serviceOpts = {
serviceConfig = {
ExecStart = ''
${pkgs.prometheus-imap-mailstat-exporter}/bin/imap-mailstat-exporter \
-config ${createConfigFile cfg.accounts} \
${optionalString cfg.oldestUnseenDate "-oldestunseendate"} \
${concatStringsSep " \\\n " cfg.extraFlags}
'';
};
};
}
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