38 lines
1.2 KiB
Nix
38 lines
1.2 KiB
Nix
{
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liminix, lib, lim, s6, s6-rc, watch-outputs
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}:
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{ watch, service, action } :
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let
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inherit (liminix.services) oneshot longrun;
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inherit (builtins) length head toString;
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inherit (lib) unique optional;
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inherit (service) name;
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watched-services = unique (map (f: f.service) watch);
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paths = unique (map (f: f.path) watch);
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watched-service =
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if length watched-services == 0
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then null
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else if length watched-services == 1
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then head watched-services
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else throw "cannot subscribe to more than one source service for secrets";
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watcher = let name' = "restart-${name}"; in longrun {
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name = name';
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run = ''
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dir=/run/service/${name}
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echo waiting for $dir
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if test -e $dir/notification-fd; then flag="-U"; else flag="-u"; fi
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${s6}/bin/s6-svwait $flag /run/service/${name} || exit
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PATH=${s6-rc}/bin:${s6}/bin:$PATH
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${watch-outputs}/bin/watch-outputs -r ${name} ${watched-service.name} ${lib.concatStringsSep " " paths}
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'';
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};
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in service.overrideAttrs(o: {
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buildInputs = (lim.orEmpty o.buildInputs) ++
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optional (watched-service != null) watcher;
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dependencies = (lim.orEmpty o.dependencies) ++
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optional (watched-service != null) watcher;
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})
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