forked from fediversity/fediversity
factor common logic back out
note that i worked around the question of how to delegate part of the options to the consumer by creating aliases for different parts of the function slot filling. i've been pretty arbitrary about this so far tho, and mostly to preserve existing interfaces, rather than out of conscious UX design per se. so the interface can def change still, but at least the _user_'s side is more DRY now!
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3 changed files with 111 additions and 123 deletions
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@ -99,7 +99,7 @@ in
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{
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options.enable = lib.mkEnableOption "Hello in the shell";
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};
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config-mapping.implementation =
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implementation =
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cfg:
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lib.optionalAttrs cfg.enable {
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resources.hello.login-shell.packages.hello = pkgs.hello;
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@ -109,7 +109,7 @@ in
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{ config, ... }:
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{
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resources.operator-environment.login-shell.username = "operator";
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resource-mapping.implementation =
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implementation =
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requests:
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{ providers, ... }:
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{
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@ -149,7 +149,7 @@ in
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};
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}
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);
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resources = fediversity.applications.hello.config-mapping.apply fediversity.example-configuration.applications.hello;
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resources = fediversity.applications.hello.resources fediversity.example-configuration.applications.hello;
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hello-shell = resources.resources.hello.login-shell;
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environment = fediversity.environments.single-nixos-vm.resources.operator-environment.login-shell;
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result = mkDeployment {
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@ -15,6 +15,7 @@ let
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functionTo
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;
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functionType = import ./function.nix;
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application-resources = submodule {
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options.resources = mkOption {
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# TODO: maybe transpose, and group the resources by type instead
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@ -96,63 +97,26 @@ in
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description = "Operator-facing configuration options for the application";
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type = deferredModuleWith { staticModules = [ { _class = "fediversity-application-config"; } ]; };
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};
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implementation = mkOption {
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description = "Mapping of application configuration to deployment resources, a description of what an application needs to run";
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type = application.config.config-mapping.function-type;
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};
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resources = mkOption {
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description = "Compute resources required by an application";
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type = application.config.config-mapping.function-type;
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readOnly = true;
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default = application.config.config-mapping.apply;
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};
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# TODO(@fricklerhandwerk): this needs a better name
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config-mapping = mkOption {
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description = "Function type for the mapping from application configuration to required resources";
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type = submodule (
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{ config, ... }:
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{
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options = {
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input-type = mkOption {
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type = optionType;
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default = submodule application.config.module;
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# default = types.int;
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};
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output-type = mkOption {
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type = optionType;
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default = application-resources;
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};
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function-type = mkOption {
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type = optionType;
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readOnly = true;
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default = functionTo config.output-type;
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};
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wrapper-type = mkOption {
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type = optionType;
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readOnly = true;
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default = functionTo (submodule {
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options = {
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input = mkOption {
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type = config.input-type;
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};
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output = mkOption {
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type = config.output-type;
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};
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};
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});
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};
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implementation = mkOption {
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type = config.function-type;
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description = "Mapping of application configuration to deployment resources, a description of what an application needs to run";
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default = _: { };
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};
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wrapper = mkOption {
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type = config.wrapper-type;
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readOnly = true;
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default = input: fn: {
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inherit input;
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output = config.implementation fn.config.input;
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};
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};
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apply = mkOption {
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type = config.function-type;
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readOnly = true;
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default = input: (config.wrapper input).output;
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};
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};
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}
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);
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default = { };
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description = "Compute resources required by an application";
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type = submodule functionType;
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readOnly = true;
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default = {
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input-type = submodule application.config.module;
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output-type = application-resources;
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implementation = application.config.implementation;
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};
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};
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};
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})
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@ -177,80 +141,46 @@ in
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)
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);
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};
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implementation = mkOption {
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description = "Mapping of resources required by applications to available resources; the result can be deployed";
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type = environment.config.resource-mapping.function-type;
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};
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resource-mapping = mkOption {
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description = "Function type for the mapping from resources to a (NixOps4) deployment";
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type = submodule (
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{ config, ... }:
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{
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options = {
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input-type = mkOption {
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type = optionType;
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default = submodule application-resources;
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# default = types.int;
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};
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output-type = mkOption {
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type = optionType;
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default = nixops4Deployment;
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};
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function-type = mkOption {
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type = optionType;
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readOnly = true;
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default = functionTo config.output-type;
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};
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wrapper-type = mkOption {
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type = optionType;
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readOnly = true;
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default = functionTo (submodule {
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options = {
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input = mkOption {
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type = config.input-type;
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};
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output = mkOption {
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type = config.output-type;
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};
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};
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});
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};
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implementation = mkOption {
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type = config.function-type;
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description = "Mapping of resources required by applications to available resources; the result can be deployed";
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default = _: { };
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};
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wrapper = mkOption {
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type = config.wrapper-type;
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readOnly = true;
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default = input: fn: {
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inherit input;
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output = config.implementation fn.config.input;
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};
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};
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apply = mkOption {
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type = config.function-type;
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readOnly = true;
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default = input: (config.wrapper input).output;
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};
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};
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}
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);
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default = { };
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type = submodule functionType;
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readOnly = true;
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default = {
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input-type = application-resources;
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output-type = nixops4Deployment;
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implementation = environment.config.implementation;
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};
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};
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config-mapping = mkOption {
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description = "Mapping from a configuration to a deployment";
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type = submodule functionType;
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readOnly = true;
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default = {
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input-type = config.configuration;
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output-type = nixops4Deployment;
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implementation =
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cfg:
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# TODO: check cfg.enable.true
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let
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required-resources = lib.mapAttrs (
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name: application-settings: config.applications.${name}.resources application-settings
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) cfg.applications;
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in
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environment.config.resource-mapping.apply required-resources;
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};
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};
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# TODO(@fricklerhandwerk): maybe this should be a separate thing such as `fediversity-setup`,
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# which makes explicit which applications and environments are available.
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# then the deployments can simply be the result of the function application baked into this module.
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deployment = mkOption {
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description = "Generate a deployment from a configuration, by applying an environment's resource policies to the applications' resource mappings";
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type = functionTo (environment.config.resource-mapping.output-type);
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type = environment.config.config-mapping.function-type;
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readOnly = true;
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default =
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cfg:
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# TODO: check cfg.enable.true
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let
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required-resources = lib.mapAttrs (
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name: application-settings: config.applications.${name}.resources application-settings
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) cfg.applications;
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in
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environment.config.implementation required-resources;
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default = environment.config.config-mapping.apply;
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};
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};
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})
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58
deployment/function.nix
Normal file
58
deployment/function.nix
Normal file
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@ -0,0 +1,58 @@
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/**
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Modular function type
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*/
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{ config, lib, ... }:
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let
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inherit (lib) mkOption types;
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inherit (types)
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submodule
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functionTo
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optionType
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;
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in
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{
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options = {
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input-type = mkOption {
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type = optionType;
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};
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output-type = mkOption {
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type = optionType;
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};
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function-type = mkOption {
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type = optionType;
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readOnly = true;
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default = functionTo config.output-type;
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};
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wrapper-type = mkOption {
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type = optionType;
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readOnly = true;
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default = functionTo (submodule {
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options = {
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input = mkOption {
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type = config.input-type;
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};
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output = mkOption {
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type = config.output-type;
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};
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};
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});
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};
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implementation = mkOption {
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type = config.function-type;
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default = _: { };
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};
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wrapper = mkOption {
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type = config.wrapper-type;
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readOnly = true;
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default = input: fn: {
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inherit input;
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output = config.implementation fn.config.input;
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};
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};
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apply = mkOption {
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type = config.function-type;
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readOnly = true;
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default = input: (config.wrapper input).output;
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};
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};
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}
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