clan-core/inventory/default.nix

100 lines
3.0 KiB
Nix

{ self, lib, ... }:
let
clan-core = self;
# syncthing_inventory = builtins.fromJSON (builtins.readFile ./src/tests/syncthing.json);
syncthing_inventory = builtins.fromJSON (builtins.readFile ./src/tests/borgbackup.json);
machines = machinesFromInventory syncthing_inventory;
resolveGroups =
inventory: members:
lib.unique (
builtins.foldl' (
acc: currMember:
let
groupName = builtins.substring 6 (builtins.stringLength currMember - 6) currMember;
groupMembers =
if inventory.groups.machines ? ${groupName} then
inventory.groups.machines.${groupName}
else
throw "Machine group ${currMember} not found. Key: groups.machines.${groupName} not in inventory.";
in
if lib.hasPrefix "group:" currMember then (acc ++ groupMembers) else acc ++ [ currMember ]
) [ ] members
);
/*
Returns a NixOS configuration for every machine in the inventory.
machinesFromInventory :: Inventory -> { ${machine_name} :: NixOSConfiguration }
*/
machinesFromInventory =
inventory:
# For every machine in the inventory, build a NixOS configuration
# For each machine generate config, forEach service, if the machine is used.
builtins.mapAttrs (
machineName: _:
lib.foldlAttrs (
# [ Modules ], String, { ${instance_name} :: ServiceConfig }
acc: moduleName: serviceConfigs:
acc
# Collect service config
++ (lib.foldlAttrs (
# [ Modules ], String, ServiceConfig
acc2: instanceName: serviceConfig:
let
resolvedRoles = builtins.mapAttrs (
_roleName: members: resolveGroups inventory members
) serviceConfig.roles;
isInService = builtins.any (members: builtins.elem machineName members) (
builtins.attrValues resolvedRoles
);
machineServiceConfig = (serviceConfig.machines.${machineName} or { }).config or { };
globalConfig = serviceConfig.config;
in
if isInService then
acc2
++ [
{
imports = [ clan-core.clanModules.${moduleName} ];
config.clan.${moduleName} = lib.mkMerge [
globalConfig
machineServiceConfig
];
}
{
config.clan.inventory.${instanceName} = {
roles = resolvedRoles;
};
}
]
else
acc2
) [ ] serviceConfigs)
) [ ] inventory.services
) inventory.machines;
in
{
clan = clan-core.lib.buildClan {
meta.name = "vis clans";
# Should usually point to the directory of flake.nix
directory = self;
machines = {
"vi_machine" = {
imports = machines.vi_machine;
};
"vyr_machine" = {
imports = machines.vyr_machine;
};
"camina_machine" = {
imports = machines.camina_machine;
};
};
};
intern = machines;
}