blob: fb23589d4550b8abb3da054ceb9761493f01c9ea (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
{ pkgs, ... }:
# Keep the Mac awake while a herdr agent is actively working.
# A launchd user agent polls `herdr agent list` and holds a `caffeinate`
# process for as long as at least one agent reports the `working` status.
let
interval = 20;
supervisor = pkgs.writeShellScript "herdr-caffeinate" ''
set -u
herdr=${pkgs.herdr}/bin/herdr
jq=${pkgs.jq}/bin/jq
caffeinate=/usr/bin/caffeinate
caff_pid=""
stop_caffeinate() {
if [ -n "$caff_pid" ] && kill -0 "$caff_pid" 2>/dev/null; then
kill "$caff_pid" 2>/dev/null || true
fi
caff_pid=""
}
trap 'stop_caffeinate; exit 0' TERM INT EXIT
while true; do
working=0
# `agent list` fails (nonzero, stderr) when no herdr server is running;
# that safely resolves to "no agents working".
if list=$("$herdr" agent list 2>/dev/null); then
count=$(printf '%s' "$list" \
| "$jq" -r '[.result.agents[]? | select(.agent_status == "working")] | length' 2>/dev/null \
|| printf '0')
[ "''${count:-0}" -gt 0 ] && working=1
fi
if [ "$working" -eq 1 ]; then
if [ -z "$caff_pid" ] || ! kill -0 "$caff_pid" 2>/dev/null; then
# -s prevents system sleep (AC), -i prevents idle sleep (also on battery)
"$caffeinate" -s -i &
caff_pid=$!
fi
else
stop_caffeinate
fi
sleep ${toString interval}
done
'';
in
{
launchd.user.agents.herdr-caffeinate = {
serviceConfig = {
ProgramArguments = [ "${supervisor}" ];
RunAtLoad = true;
KeepAlive = true;
ProcessType = "Background";
StandardErrorPath = "/tmp/herdr-caffeinate.err.log";
};
};
}
|
