forked from dan/liminix
51 lines
1.5 KiB
Nix
51 lines
1.5 KiB
Nix
{
|
|
liminix, lib, lim, s6, s6-rc, watch-outputs
|
|
}:
|
|
{ watch, service, action } :
|
|
let
|
|
inherit (liminix.services) oneshot longrun;
|
|
inherit (builtins) length head toString;
|
|
inherit (lib) unique optional;
|
|
inherit (service) name;
|
|
|
|
watched-services = unique (map (f: f "service") watch);
|
|
paths = unique (map (f: f "path") watch);
|
|
|
|
restart-flag = {
|
|
restart = "-r";
|
|
restart-all = "-R";
|
|
"hup" = "-s 1";
|
|
"int" = "-s 2";
|
|
"quit" = "-s 3";
|
|
"kill" = "-s 9";
|
|
"term" = "-s 15";
|
|
"winch" = "-s 28";
|
|
"usr1" = "-s 10";
|
|
"usr2" = "-s 12";
|
|
}.${action};
|
|
|
|
watched-service =
|
|
if length watched-services == 0
|
|
then null
|
|
else if length watched-services == 1
|
|
then head watched-services
|
|
else throw "cannot subscribe to more than one source service for secrets";
|
|
|
|
watcher = let name' = "restart-${name}"; in longrun {
|
|
name = name';
|
|
run = ''
|
|
dir=/run/service/${name}
|
|
echo waiting for $dir
|
|
if test -e $dir/notification-fd; then flag="-U"; else flag="-u"; fi
|
|
${s6}/bin/s6-svwait $flag /run/service/${name} || exit
|
|
PATH=${s6-rc}/bin:${s6}/bin:$PATH
|
|
${watch-outputs}/bin/watch-outputs ${restart-flag} ${name} ${watched-service.name} ${lib.concatStringsSep " " paths}
|
|
'';
|
|
};
|
|
in service.overrideAttrs(o: {
|
|
buildInputs = (lim.orEmpty o.buildInputs) ++
|
|
optional (watched-service != null) watcher;
|
|
dependencies = (lim.orEmpty o.dependencies) ++
|
|
optional (watched-service != null) watcher;
|
|
})
|