43 lines
2.0 KiB
TypeScript
43 lines
2.0 KiB
TypeScript
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/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import { BabelFile, types as t } from '@babel/core';
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/**
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* Augment some Babel types to add symbols that we rely on, but are not included in the Babel typings.
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*/
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declare module '@babel/traverse' {
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interface Hub {
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file: BabelFile;
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}
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}
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declare module '@babel/core' {
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interface BabelFile {
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buildCodeFrameError(node: t.Node, message: string): Error;
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}
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}
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// The following modules are declared to work around a limitation in tsc_wrapped's `strict_deps`
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// check. Since Babel uses scoped packages, the corresponding lookup for declaration files in the
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// `node_modules/@types/` directory follows a special strategy: the `@types` package has to be
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// named `{scope}__{package}`, e.g. `@types/babel__generator`. When `tsc` performs module
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// resolution for the `@babel/generator` module specifier, it will first try the `paths` mappings
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// but resolution through path mappings does _not_ apply this special naming convention rule for
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// `@types` packages, `tsc` only applies that rule in its `@types` resolution step. Consequently,
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// the path mapping into Bazel's private `node_modules` directory fails to resolve, causing `tsc`
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// to find the nearest `node_modules` directory in an ancestor directory of the origin source
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// file. This finds the `node_modules` directory in the workspace, _not_ Bazel's private copy of
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// `node_modules` and therefore the `@types` end up being resolved from a `node_modules` tree
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// that is not governed by Bazel, and therefore not expected by the `strict_deps` rule.
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// Declaring the modules here allows `strict_deps` to always find a declaration of the modules
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// in an input file to the compilation, therefore accepting the module import.
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declare module '@babel/generator' {}
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declare module '@babel/template' {}
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declare module '@babel/parser' {}
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