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|
{ options, config, lib, pkgs, ... }:
with lib;
let
runDir = "/run/searx";
cfg = config.services.searx;
settingsFile = pkgs.writeText "settings.yml"
(builtins.toJSON cfg.settings);
generateConfig = ''
cd ${runDir}
# write NixOS settings as JSON
(
umask 077
cp --no-preserve=mode ${settingsFile} settings.yml
)
# substitute environment variables
env -0 | while IFS='=' read -r -d ''' n v; do
sed "s#@$n@#$v#g" -i settings.yml
done
'';
settingType = with types; (oneOf
[ bool int float str
(listOf settingType)
(attrsOf settingType)
]) // { description = "JSON value"; };
in
{
imports = [
(mkRenamedOptionModule
[ "services" "searx" "configFile" ]
[ "services" "searx" "settingsFile" ])
];
###### interface
options = {
services.searx = {
enable = mkOption {
type = types.bool;
default = false;
relatedPackages = [ "searx" ];
description = "Whether to enable Searx, the meta search engine.";
};
environmentFile = mkOption {
type = types.nullOr types.path;
default = null;
description = ''
Environment file (see <literal>systemd.exec(5)</literal>
"EnvironmentFile=" section for the syntax) to define variables for
Searx. This option can be used to safely include secret keys into the
Searx configuration.
'';
};
settings = mkOption {
type = types.attrsOf settingType;
default = { };
example = literalExpression ''
{ server.port = 8080;
server.bind_address = "0.0.0.0";
server.secret_key = "@SEARX_SECRET_KEY@";
engines = lib.singleton
{ name = "wolframalpha";
shortcut = "wa";
api_key = "@WOLFRAM_API_KEY@";
engine = "wolframalpha_api";
};
}
'';
description = ''
Searx settings. These will be merged with (taking precedence over)
the default configuration. It's also possible to refer to
environment variables
(defined in <xref linkend="opt-services.searx.environmentFile"/>)
using the syntax <literal>@VARIABLE_NAME@</literal>.
<note>
<para>
For available settings, see the Searx
<link xlink:href="https://searx.github.io/searx/admin/settings.html">docs</link>.
</para>
</note>
'';
};
settingsFile = mkOption {
type = types.path;
default = "${runDir}/settings.yml";
description = ''
The path of the Searx server settings.yml file. If no file is
specified, a default file is used (default config file has debug mode
enabled). Note: setting this options overrides
<xref linkend="opt-services.searx.settings"/>.
<warning>
<para>
This file, along with any secret key it contains, will be copied
into the world-readable Nix store.
</para>
</warning>
'';
};
package = mkOption {
type = types.package;
default = pkgs.searx;
defaultText = literalExpression "pkgs.searx";
description = "searx package to use.";
};
runInUwsgi = mkOption {
type = types.bool;
default = false;
description = ''
Whether to run searx in uWSGI as a "vassal", instead of using its
built-in HTTP server. This is the recommended mode for public or
large instances, but is unecessary for LAN or local-only use.
<warning>
<para>
The built-in HTTP server logs all queries by default.
</para>
</warning>
'';
};
uwsgiConfig = mkOption {
type = options.services.uwsgi.instance.type;
default = { http = ":8080"; };
example = literalExpression ''
{
disable-logging = true;
http = ":8080"; # serve via HTTP...
socket = "/run/searx/searx.sock"; # ...or UNIX socket
}
'';
description = ''
Additional configuration of the uWSGI vassal running searx. It
should notably specify on which interfaces and ports the vassal
should listen.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = [ cfg.package ];
users.users.searx =
{ description = "Searx daemon user";
group = "searx";
isSystemUser = true;
};
users.groups.searx = { };
systemd.services.searx-init = {
description = "Initialise Searx settings";
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
User = "searx";
RuntimeDirectory = "searx";
RuntimeDirectoryMode = "750";
} // optionalAttrs (cfg.environmentFile != null)
{ EnvironmentFile = builtins.toPath cfg.environmentFile; };
script = generateConfig;
};
systemd.services.searx = mkIf (!cfg.runInUwsgi) {
description = "Searx server, the meta search engine.";
wantedBy = [ "network.target" "multi-user.target" ];
requires = [ "searx-init.service" ];
after = [ "searx-init.service" ];
serviceConfig = {
User = "searx";
Group = "searx";
ExecStart = "${cfg.package}/bin/searx-run";
} // optionalAttrs (cfg.environmentFile != null)
{ EnvironmentFile = builtins.toPath cfg.environmentFile; };
environment.SEARX_SETTINGS_PATH = cfg.settingsFile;
};
systemd.services.uwsgi = mkIf (cfg.runInUwsgi)
{ requires = [ "searx-init.service" ];
after = [ "searx-init.service" ];
};
services.searx.settings = {
# merge NixOS settings with defaults settings.yml
use_default_settings = mkDefault true;
};
services.uwsgi = mkIf (cfg.runInUwsgi) {
enable = true;
plugins = [ "python3" ];
instance.type = "emperor";
instance.vassals.searx = {
type = "normal";
strict = true;
immediate-uid = "searx";
immediate-gid = "searx";
lazy-apps = true;
enable-threads = true;
module = "searx.webapp";
env = [ "SEARX_SETTINGS_PATH=${cfg.settingsFile}" ];
pythonPackages = self: [ cfg.package ];
} // cfg.uwsgiConfig;
};
};
meta.maintainers = with maintainers; [ rnhmjoj ];
}
|