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|
{ lib, config, pkgs, ... }:
with lib;
let
cfg = config.services.filesWatcher;
in
{
options = {
services.filesWatcher = with types; mkOption {
default = {};
description = ''
Files to watch and trigger service reload or restart of service
when changed.
'';
type = attrsOf (submodule {
options = {
restart = mkEnableOption "Restart service rather than reloading it";
paths = mkOption {
type = listOf str;
description = ''
Paths to watch that should trigger a reload of the
service
'';
};
waitTime = mkOption {
type = int;
default = 5;
description = ''
Time to wait before reloading/restarting the service.
Set 0 to not wait.
'';
};
};
});
};
};
config.systemd.services = attrsets.mapAttrs' (name: icfg: attrsets.nameValuePair
"${name}Watcher" {
description = "${name} reloader";
after = [ "network.target" ];
script = let
action = if icfg.restart then "restart" else "reload";
in ''
# Service may be stopped during file modification (e.g. activationScripts)
if ${pkgs.systemd}/bin/systemctl --quiet is-active ${name}.service; then
${pkgs.coreutils}/bin/sleep ${toString icfg.waitTime}
${pkgs.systemd}/bin/systemctl ${action} ${name}.service
fi
'';
serviceConfig = {
Type = "oneshot";
};
}
) cfg;
config.systemd.paths = attrsets.mapAttrs' (name: icfg: attrsets.nameValuePair
"${name}Watcher" {
wantedBy = [ "multi-user.target" ];
pathConfig.PathChanged = icfg.paths;
}
) cfg;
}
|
