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feat(clan-service): add module context for better error messages

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This commit is contained in:
Johannes Kirschbauer
2025-06-14 19:57:59 +02:00
parent 4e2ccf0117
commit 216494c3db
2 changed files with 44 additions and 8 deletions
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51
lib/inventory/distributed-service/service-module.nix
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@@ -1,8 +1,14 @@
{ lib, config, ... }:
{
lib,
config,
_ctx,
...
}:
let
inherit (lib) mkOption types;
inherit (types) attrsWith submoduleWith;
errorContext = "Error context: ${lib.concatStringsSep "." _ctx}";
# TODO:
# Remove once this gets merged upstream; performs in O(n*log(n) instead of O(n^2))
# https://github.com/NixOS/nixpkgs/pull/355616/files
@@ -53,7 +59,8 @@ let
# This prints the path where the option should be defined rather than the plain path within settings
# "The option `instances.foo.roles.server.machines.test.settings.<>' was accessed but has no value defined. Try setting the option."
prefix =
[
_ctx
++ [
"instances"
instanceName
"roles"
@@ -78,7 +85,7 @@ let
(lib.setDefaultModuleLocation "Via clan.service module: roles.${roleName}.interface"
config.roles.${roleName}.interface
)
(lib.setDefaultModuleLocation "inventory.instances.${instanceName}.roles.${roleName}.settings"
(lib.setDefaultModuleLocation "instances.${instanceName}.roles.${roleName}.settings"
config.instances.${instanceName}.roles.${roleName}.settings
)
settings
@@ -156,7 +163,9 @@ in
default = throw ''
The clan service module ${config.manifest.name} doesn't define any instances.
Did you forget to create instances via 'inventory.instances'?
Did you forget to create instances via 'instances'?
${errorContext}
'';
description = ''
Instances of the service.
@@ -204,7 +213,9 @@ in
Instance '${name}' of service '${config.manifest.name}' mut define members via 'roles'.
To include a machine:
'instances.${name}.roles.<role-name>.machines.<your-machine-name>' must be set.
'instances.${name}.roles.<role-name>.machines.<machine-name>' must be set.
${errorContext}
'';
type = attrsWith {
placeholder = "roleName";
@@ -301,6 +312,8 @@ in
To define multiple instance behavior:
`roles.client.perInstance = { ... }: {}`
${errorContext}
'';
type = attrsWith {
placeholder = "roleName";
@@ -379,7 +392,7 @@ in
};
```
- `settings`: The settings of the role, as defined in `inventory`
- `settings`: The settings of the role, as defined in `instances`
```nix
{
timeout = 30;
@@ -438,7 +451,18 @@ in
type = attrsWith {
placeholder = "serviceName";
elemType = submoduleWith {
modules = [ ./service-module.nix ];
modules = [
{
_module.args._ctx = _ctx ++ [
config.manifest.name
"roles"
roleName
"perInstance"
"services"
];
}
./service-module.nix
];
};
};
apply = _: throw "Not implemented yet";
@@ -554,7 +578,16 @@ in
type = attrsWith {
placeholder = "serviceName";
elemType = submoduleWith {
modules = [ ./service-module.nix ];
modules = [
{
_module.args._ctx = _ctx ++ [
config.manifest.name
"perMachine"
"services"
];
}
./service-module.nix
];
};
};
apply = _: throw "Not implemented yet";
@@ -605,6 +638,8 @@ in
- 'instances.<instanceName>.roles.<roleName>.machines.<machineName>.settings' should be used instead.
If that is insufficient, you might also consider using 'roles.<roleName>.perInstance' instead of 'perMachine'.
${errorContext}
'';
};