forked from Fediversity/Fediversity
add classes #4
2 changed files with 147 additions and 119 deletions
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@ -17,6 +17,8 @@ let
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inherit (inputs.nixops4.lib) mkDeployment;
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in
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{
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_class = "nix-unit";
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test-eval = {
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expr =
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let
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@ -11,12 +11,14 @@ let
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attrTag
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deferredModuleWith
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submodule
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submoduleWith
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optionType
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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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_class = "fediversity-application-requirements";
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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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type = attrsOf (
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@ -40,140 +42,161 @@ let
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};
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in
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{
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_class = "fediversity-settings";
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options = {
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resources = mkOption {
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description = "Collection of deployment resources that can be required by applications and policed by hosting providers";
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type = attrsOf (
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submodule (
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{ ... }:
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{
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_class = "fediversity-resource";
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options = {
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description = mkOption {
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description = "Description of the resource to help application module authors and hosting providers to work with it";
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type = types.str;
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};
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request = mkOption {
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description = "Options for declaring resource requirements by an application, a description of how the resource is consumed or accessed";
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type = deferredModuleWith { staticModules = [ { _class = "fediversity-resource-request"; } ]; };
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};
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policy = mkOption {
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description = "Options for configuring the resource policy for the hosting provider, a description of how the resource is made available";
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type = deferredModuleWith {
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staticModules = [
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(policy: {
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_class = "fediversity-resource-policy";
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# TODO(@fricklerhandwerk): not sure it can be made
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# sensible syntactically, but essentially we want to
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# ensure that `apply` is defined, but since its output
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# depends on the specific policy we also need to
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# determine that somehow.
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# hopefully this also helps with correct composition down the line.
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options.resource-type = mkOption {
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description = "The type of resource this policy configures";
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type = types.optionType;
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};
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# TODO(@fricklerhandwerk): do we need a function type here as well, or is it in the way?
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options.apply = mkOption {
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description = "Apply the policy to a request";
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type = with types; functionTo policy.config.resource-type;
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};
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})
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];
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type = attrsOf (submoduleWith {
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class = "fediversity-resource";
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modules = [
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(
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{ ... }:
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{
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options = {
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description = mkOption {
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description = "Description of the resource to help application module authors and hosting providers to work with it";
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type = types.str;
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};
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request = mkOption {
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description = "Options for declaring resource requirements by an application, a description of how the resource is consumed or accessed";
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type = deferredModuleWith { staticModules = [ { _class = "fediversity-resource-request"; } ]; };
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};
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policy = mkOption {
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description = "Options for configuring the resource policy for the hosting provider, a description of how the resource is made available";
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type = deferredModuleWith {
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staticModules = [
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(policy: {
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_class = "fediversity-resource-policy";
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# TODO(@fricklerhandwerk): not sure it can be made
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# sensible syntactically, but essentially we want to
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# ensure that `apply` is defined, but since its output
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# depends on the specific policy we also need to
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# determine that somehow.
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# hopefully this also helps with correct composition down the line.
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options.resource-type = mkOption {
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description = "The type of resource this policy configures";
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type = types.optionType;
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};
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# TODO(@fricklerhandwerk): do we need a function type here as well, or is it in the way?
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options.apply = mkOption {
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description = "Apply the policy to a request";
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type = with types; functionTo policy.config.resource-type;
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};
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})
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];
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};
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};
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};
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};
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}
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)
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);
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}
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)
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];
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});
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};
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applications = mkOption {
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description = "Collection of Fediversity applications";
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type = attrsOf (
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submodule (application: {
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_class = "fediversity-application";
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options = {
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description = mkOption {
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description = "Description to be shown in the application overview";
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type = types.str;
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};
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module = mkOption {
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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 = functionTo application.config.config-mapping.output-type;
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readOnly = true;
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default = input: (application.config.implementation input).output;
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};
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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 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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type = attrsOf (submoduleWith {
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class = "fediversity-application";
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modules = [
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(application: {
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options = {
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description = mkOption {
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description = "Description to be shown in the application overview";
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type = types.str;
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};
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module = mkOption {
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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 = functionTo application.config.config-mapping.output-type;
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readOnly = true;
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default = input: (application.config.implementation input).output;
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};
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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 = submoduleWith {
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class = "module-function";
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modules = [ functionType ];
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};
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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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};
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};
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};
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};
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})
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);
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})
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];
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});
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};
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environments = mkOption {
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description = "Run-time environments for Fediversity applications to be deployed to";
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type = attrsOf (
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submodule (environment: {
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_class = "fediversity-environment";
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options = {
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resources = mkOption {
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description = ''
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Resources made available by the hosting provider, and their policies.
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type = attrsOf (submoduleWith {
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class = "fediversity-environment";
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modules = [
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(environment: {
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options = {
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resources = mkOption {
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description = ''
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Resources made available by the hosting provider, and their policies.
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Setting this is optional, but provides a place to declare that information for programmatic use in the resource mapping.
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'';
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# TODO: maybe transpose, and group the resources by type instead
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type = attrsOf (
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attrTag (
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lib.mapAttrs (
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_name: resource:
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mkOption {
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type = submoduleWith {
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class = "fediversity-resource-policy";
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modules = [ resource.policy ];
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};
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}
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) config.resources
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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 = submoduleWith {
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class = "module-function";
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modules = [ functionType ];
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};
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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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};
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};
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deployment = mkOption {
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description = "Generate a deployment from a configuration";
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type = functionTo (environment.config.resource-mapping.output-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).output;
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Setting this is optional, but provides a place to declare that information for programmatic use in the resource mapping.
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'';
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# TODO: maybe transpose, and group the resources by type instead
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type = attrsOf (
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attrTag (
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lib.mapAttrs (_name: resource: mkOption { type = submodule resource.policy; }) config.resources
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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 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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};
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};
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deployment = mkOption {
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description = "Generate a deployment from a configuration";
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type = functionTo (environment.config.resource-mapping.output-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).output;
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};
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};
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})
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);
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})
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];
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});
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};
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configuration = mkOption {
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description = "Configuration type declaring options to be set by operators";
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@ -188,7 +211,10 @@ in
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_name: application:
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mkOption {
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description = application.description;
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type = submodule application.module;
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type = submoduleWith {
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class = "fediversity-application-config";
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modules = [ application.module ];
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};
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default = { };
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}
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) config.applications;
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