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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/utils.nix
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@ -35,7 +35,8 @@ let
inherit (lib.strings) toJSON normalizePath escapeC;
in
rec {
let
utils = rec {
# Copy configuration files to avoid having the entire sources in the system closure
copyFile = filePath: pkgs.runCommand (builtins.unsafeDiscardStringContext (baseNameOf filePath)) {} ''
@ -262,11 +263,12 @@ rec {
filter (x: !(elem (getName x) namesToRemove)) packages;
systemdUtils = {
lib = import ./systemd-lib.nix { inherit lib config pkgs; };
lib = import ./systemd-lib.nix { inherit lib config pkgs utils; };
unitOptions = import ./systemd-unit-options.nix { inherit lib systemdUtils; };
types = import ./systemd-types.nix { inherit lib systemdUtils pkgs; };
network = {
units = import ./systemd-network-units.nix { inherit lib systemdUtils; };
};
};
}
};
in utils