Provide plugin/preset typings from plugin-utils

packages/babel-core/src/config/helpers/config-api.ts

@@ -9,7 +9,7 @@ import type {
   SimpleType,
 } from "../caching";
 
-import type { CallerMetadata } from "../validation/options";
+import type { AssumptionName, CallerMetadata } from "../validation/options";
 
 import * as Context from "../cache-contexts";
 
@@ -24,7 +24,7 @@ type CallerFactory = (
   extractor: (callerMetadata: CallerMetadata | void) => unknown,
 ) => SimpleType;
 type TargetsFunction = () => Targets;
-type AssumptionFunction = (name: string) => boolean | void;
+type AssumptionFunction = (name: AssumptionName) => boolean;
 
 export type ConfigAPI = {
   version: string;

packages/babel-core/src/config/index.ts

@@ -9,6 +9,17 @@ export type {
 
 import type { PluginTarget } from "./validation/options";
 
+import type {
+  PluginAPI as basePluginAPI,
+  PresetAPI as basePresetAPI,
+} from "./helpers/config-api";
+export type { PluginObject } from "./validation/plugins";
+type PluginAPI = basePluginAPI & typeof import("..");
+type PresetAPI = basePresetAPI & typeof import("..");
+export type { PluginAPI, PresetAPI };
+// todo: may need to refine PresetObject to be a subset of ValidatedOptions
+export type { ValidatedOptions as PresetObject } from "./validation/options";
+
 import loadFullConfig from "./full";
 import { loadPartialConfig as loadPartialConfigRunner } from "./partial";
 

packages/babel-core/src/config/validation/option-assertions.ts

@@ -20,6 +20,7 @@ import type {
   CallerMetadata,
   RootMode,
   TargetsListOrObject,
+  AssumptionName,
 } from "./options";
 
 import { assumptionsNames } from "./options";
@@ -462,7 +463,7 @@ export function assertAssumptions(
 
   for (const name of Object.keys(value)) {
     const subLoc = access(loc, name);
-    if (!assumptionsNames.has(name)) {
+    if (!assumptionsNames.has(name as AssumptionName)) {
       throw new Error(`${msg(subLoc)} is not a supported assumption.`);
     }
     if (typeof value[name] !== "boolean") {

packages/babel-core/src/config/validation/options.ts

@@ -28,6 +28,8 @@ import {
 } from "./option-assertions";
 import type { ValidatorSet, Validator, OptionPath } from "./option-assertions";
 import type { UnloadedDescriptor } from "../config-descriptors";
+import type { ParserOptions } from "@babel/parser";
+import type { GeneratorOptions } from "@babel/generator";
 
 const ROOT_VALIDATORS: ValidatorSet = {
   cwd: assertString as Validator<ValidatedOptions["cwd"]>,
@@ -181,9 +183,9 @@ export type ValidatedOptions = {
   sourceFileName?: string;
   sourceRoot?: string;
   // Deprecate top level parserOpts
-  parserOpts?: {};
+  parserOpts?: ParserOptions;
   // Deprecate top level generatorOpts
-  generatorOpts?: {};
+  generatorOpts?: GeneratorOptions;
 };
 
 export type NormalizedOptions = {
@@ -254,7 +256,7 @@ type EnvPath = Readonly<{
 
 export type NestingPath = RootPath | OverridesPath | EnvPath;
 
-export const assumptionsNames = new Set<string>([
+const knownAssumptions = [
   "arrayLikeIsIterable",
   "constantReexports",
   "constantSuper",
@@ -276,7 +278,9 @@ export const assumptionsNames = new Set<string>([
   "setSpreadProperties",
   "skipForOfIteratorClosing",
   "superIsCallableConstructor",
-]);
+] as const;
+export type AssumptionName = typeof knownAssumptions[number];
+export const assumptionsNames = new Set(knownAssumptions);
 
 function getSource(loc: NestingPath): OptionsSource {
   return loc.type === "root" ? loc.source : getSource(loc.parent);

packages/babel-core/src/config/validation/plugins.ts

@@ -11,6 +11,10 @@ import type {
   OptionPath,
   RootPath,
 } from "./option-assertions";
+import type { ParserOptions } from "@babel/parser";
+import type { Visitor } from "@babel/traverse";
+import PluginPass from "../../transformation/plugin-pass";
+import type { ValidatedOptions } from "./options";
 
 // Note: The casts here are just meant to be static assertions to make sure
 // that the assertion functions actually assert that the value's type matches
@@ -31,7 +35,7 @@ const VALIDATORS: ValidatorSet = {
   >,
 };
 
-function assertVisitorMap(loc: OptionPath, value: unknown): VisitorMap {
+function assertVisitorMap(loc: OptionPath, value: unknown): Visitor {
   const obj = assertObject(loc, value);
   if (obj) {
     Object.keys(obj).forEach(prop => assertVisitorHandler(prop, obj[prop]));
@@ -45,7 +49,7 @@ function assertVisitorMap(loc: OptionPath, value: unknown): VisitorMap {
       );
     }
   }
-  return obj as VisitorMap;
+  return obj as Visitor;
 }
 
 function assertVisitorHandler(
@@ -74,17 +78,16 @@ type VisitorHandler =
       exit?: Function;
     };
 
-export type VisitorMap = {
-  [x: string]: VisitorHandler;
-};
-
-export type PluginObject = {
+export type PluginObject<S = PluginPass> = {
   name?: string;
-  manipulateOptions?: (options: unknown, parserOpts: unknown) => void;
+  manipulateOptions?: (
+    options: ValidatedOptions,
+    parserOpts: ParserOptions,
+  ) => void;
   pre?: Function;
   post?: Function;
   inherits?: Function;
-  visitor?: VisitorMap;
+  visitor?: Visitor<S>;
   parserOverride?: Function;
   generatorOverride?: Function;
 };

packages/babel-core/src/index.ts

@@ -29,6 +29,13 @@ export {
   loadOptionsAsync,
 } from "./config";
 
+export type {
+  PluginAPI,
+  PluginObject,
+  PresetAPI,
+  PresetObject,
+} from "./config";
+
 export { transform, transformSync, transformAsync } from "./transform";
 export {
   transformFile,

packages/babel-generator/src/generators/methods.ts

@@ -146,7 +146,6 @@ function hasTypesOrComments(
   return !!(
     node.typeParameters ||
     node.returnType ||
-    // @ts-expect-error
     node.predicate ||
     param.typeAnnotation ||
     param.optional ||

packages/babel-generator/src/index.ts

@@ -1,7 +1,7 @@
 import SourceMap from "./source-map";
 import Printer from "./printer";
 import type * as t from "@babel/types";
-
+import type { Opts as jsescOptions } from "jsesc";
 import type { Format } from "./printer";
 
 /**
@@ -186,19 +186,12 @@ export interface GeneratorOptions {
   /**
    * Options for outputting jsesc representation.
    */
-  jsescOption?: {
-    /**
-     * The type of quote to use in the output. If omitted, autodetects based on `ast.tokens`.
-     */
-    quotes?: "single" | "double";
-
-    /**
-     * When enabled, the output is a valid JavaScript string literal wrapped in quotes. The type of quotes can be specified through the quotes setting.
-     * Defaults to `true`.
-     */
-    wrap?: boolean;
-  };
+  jsescOption?: jsescOptions;
 
+  /**
+   * For use with the recordAndTuple token.
+   */
+  recordAndTupleSyntaxType?: "hash" | "bar";
   /**
    * For use with the Hack-style pipe operator.
    * Changes what token is used for pipe bodies’ topic references.

packages/babel-helper-create-class-features-plugin/src/index.ts

@@ -1,5 +1,5 @@
 import { types as t } from "@babel/core";
-import type { File } from "@babel/core";
+import type { File, PluginAPI, PluginObject } from "@babel/core";
 import type { NodePath } from "@babel/traverse";
 import nameFunction from "@babel/helper-function-name";
 import splitExportDeclaration from "@babel/helper-split-export-declaration";
@@ -14,7 +14,6 @@ import { buildDecoratedClass, hasDecorators } from "./decorators";
 import { injectInitialization, extractComputedKeys } from "./misc";
 import { enableFeature, FEATURES, isLoose, shouldTransform } from "./features";
 import { assertFieldTransformed } from "./typescript";
-import type { ParserOptions } from "@babel/parser";
 
 export { FEATURES, enableFeature, injectInitialization };
 
@@ -33,19 +32,17 @@ interface Options {
   name: string;
   feature: number;
   loose?: boolean;
-  inherits?: (api: any, options: any) => any;
-  // same as PluginObject.manipulateOptions
-  manipulateOptions?: (options: unknown, parserOpts: ParserOptions) => void;
-  // TODO(flow->ts): change to babel api
-  api?: { assumption: (key?: string) => boolean | undefined };
+  inherits?: PluginObject["inherits"];
+  manipulateOptions?: PluginObject["manipulateOptions"];
+  api?: PluginAPI;
 }
 
 export function createClassFeaturePlugin({
   name,
   feature,
   loose,
   manipulateOptions,
-  // TODO(Babel 8): Remove the default value
+  // @ts-ignore TODO(Babel 8): Remove the default value
   api = { assumption: () => void 0 },
   inherits,
 }: Options) {

packages/babel-helper-create-regexp-features-plugin/src/index.ts

@@ -3,6 +3,7 @@ import { featuresKey, FEATURES, enableFeature, runtimeKey } from "./features";
 import { generateRegexpuOptions, canSkipRegexpu, transformFlags } from "./util";
 
 import { types as t } from "@babel/core";
+import type { PluginObject } from "@babel/core";
 import annotateAsPure from "@babel/helper-annotate-as-pure";
 
 declare const PACKAGE_JSON: { name: string; version: string };
@@ -20,8 +21,8 @@ export function createRegExpFeaturePlugin({
   name,
   feature,
   options = {} as any,
-  manipulateOptions = (() => {}) as (opts: any, parserOpts: any) => void,
-}) {
+  manipulateOptions = (() => {}) as PluginObject["manipulateOptions"],
+}): PluginObject {
   return {
     name,
 

packages/babel-helper-module-transforms/src/get-module-name.ts

@@ -4,7 +4,7 @@ type RootOptions = {
   sourceRoot?: string;
 };
 
-type PluginOptions = {
+export type PluginOptions = {
   moduleId?: string;
   moduleIds?: boolean;
   getModuleId?: (moduleName: string) => string | null | undefined;

packages/babel-helper-module-transforms/src/index.ts

@@ -34,6 +34,7 @@ import type {
 import type { NodePath } from "@babel/traverse";
 
 export { default as getModuleName } from "./get-module-name";
+export type { PluginOptions } from "./get-module-name";
 
 export { hasExports, isSideEffectImport, isModule, rewriteThis };
 

packages/babel-helper-plugin-utils/src/index.ts

@@ -1,20 +1,24 @@
-export function declare<
-  Args extends
-    | [any]
-    | [any, any?]
-    | [any, any?, any?]
-    | [any, any]
-    | [any, any, any?]
-    | [any, any, any],
-  Builder extends (...args: Args) => any,
->(
-  builder: Builder,
-  // todo(flow->ts) maybe add stricter type for returned function
-  // reason any is there to not expose exact implementation details in type
-  // example of issue with this packages/babel-preset-typescript/src/index.ts
-): Builder extends (...args: infer A) => any ? (...args: A) => any : never {
+import type {
+  PluginAPI,
+  PluginObject,
+  PluginPass,
+  PresetAPI,
+  PresetObject,
+} from "@babel/core";
+
+export function declare<S = {}, Option = {}, API = PluginAPI>(
+  builder: (
+    api: API,
+    options: Option,
+    dirname: string,
+  ) => PluginObject<S & PluginPass>,
+): (
+  api: API,
+  options: Option,
+  dirname: string,
+) => PluginObject<S & PluginPass> {
   // @ts-ignore
-  return (api, options, dirname) => {
+  return (api, options: Option, dirname: string) => {
     let clonedApi;
 
     for (const name of Object.keys(apiPolyfills)) {
@@ -30,6 +34,12 @@ export function declare<
   };
 }
 
+export function declarePreset<Option = {}, API = PresetAPI>(
+  builder: (api: API, options: Option, dirname: string) => PresetObject,
+): (api: API, options: Option, dirname: string) => PresetObject {
+  return declare(builder as any) as any;
+}
+
 const apiPolyfills = {
   // Not supported by Babel 7 and early versions of Babel 7 beta.
   // It's important that this is polyfilled for older Babel versions

packages/babel-parser/src/plugins/flow/index.js

@@ -353,7 +353,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       return type;
     }
 
-    flowParsePredicate(): N.FlowType {
+    flowParsePredicate(): N.FlowPredicate {
       const node = this.startNode();
       const moduloLoc = this.state.startLoc;
       this.next(); // eat `%`

packages/babel-parser/typings/babel-parser.d.ts

@@ -182,7 +182,7 @@ export interface DecoratorsPluginOptions {
 
 export interface PipelineOperatorPluginOptions {
   proposal: "minimal" | "fsharp" | "hack" | "smart";
-  topicToken?: "%" | "#" | "@@" | "^^";
+  topicToken?: "%" | "#" | "@@" | "^^" | "^";
 }
 
 export interface RecordAndTuplePluginOptions {
@@ -191,6 +191,7 @@ export interface RecordAndTuplePluginOptions {
 
 export interface FlowPluginOptions {
   all?: boolean;
+  enums?: boolean;
 }
 
 export interface TypeScriptPluginOptions {

packages/babel-plugin-bugfix-safari-id-destructuring-collision-in-function-expression/src/index.ts

@@ -1,6 +1,4 @@
 import { declare } from "@babel/helper-plugin-utils";
-import type { PluginPass } from "@babel/core";
-import type { Visitor } from "@babel/traverse";
 import { shouldTransform } from "./util";
 
 export default declare(api => {
@@ -20,6 +18,6 @@ export default declare(api => {
           scope.rename(name, newParamName);
         }
       },
-    } as Visitor<PluginPass>,
+    },
   };
 });

packages/babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining/src/index.ts

@@ -1,6 +1,8 @@
 import { declare } from "@babel/helper-plugin-utils";
 import { transform } from "@babel/plugin-proposal-optional-chaining";
 import { shouldTransform } from "./util";
+import type { NodePath } from "@babel/traverse";
+import type * as t from "@babel/types";
 
 export default declare(api => {
   api.assertVersion(7);
@@ -12,7 +14,9 @@ export default declare(api => {
     name: "bugfix-v8-spread-parameters-in-optional-chaining",
 
     visitor: {
-      "OptionalCallExpression|OptionalMemberExpression"(path) {
+      "OptionalCallExpression|OptionalMemberExpression"(
+        path: NodePath<t.OptionalCallExpression | t.OptionalMemberExpression>,
+      ) {
         if (shouldTransform(path)) {
           transform(path, { noDocumentAll, pureGetters });
         }