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systemd: add a name option to all systemd units

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This allows us to set things like dependencies in a way that we can
catch typos at eval time.
So instead of
```nix
systemd.services.foo.wants = [ "bar.service" ];
```
we can write
```nix
systemd.services.foo.wants = [ config.systemd.services.bar.name ];
```
which will throw an error if no such service has been defined.

Not all cases can be done like this (eg template services), but in a lot
of cases this will allow to avoid typos.

There is a matching option on the unit option
(`systemd.units."foo.service".name`) as well.
This commit is contained in:
r-vdp 2024-03-21 14:52:12 +01:00
parent b432281d97
commit 9258f57625
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8 changed files with 124 additions and 63 deletions
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8
nixos/lib/systemd-unit-options.nix
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@ -65,6 +65,14 @@ in rec {
'';
};
name = lib.mkOption {
type = lib.types.str;
description = ''
The name of this systemd unit, including its extension.
This can be used to refer to this unit from other systemd units.
'';
};
overrideStrategy = mkOption {
default = "asDropinIfExists";
type = types.enum [ "asDropinIfExists" "asDropin" ];