@ngtools/webpack/src/paths-plugin.js

"use strict";
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.TypeScriptPathsPlugin = void 0;
const path = __importStar(require("path"));
class TypeScriptPathsPlugin {
    constructor(options) {
        if (options) {
            this.update(options);
        }
    }
    /**
     * Update the plugin with new path mapping option values.
     * The options will also be preprocessed to reduce the overhead of individual resolve actions
     * during a build.
     *
     * @param options The `paths` and `baseUrl` options from TypeScript's `CompilerOptions`.
     */
    update(options) {
        var _a, _b;
        this.baseUrl = options.baseUrl;
        this.patterns = undefined;
        if (options.paths) {
            for (const [pattern, potentials] of Object.entries(options.paths)) {
                // Ignore any entries that would not result in a new mapping
                if (potentials.length === 0 || potentials.every((potential) => potential === '*')) {
                    continue;
                }
                const starIndex = pattern.indexOf('*');
                let prefix = pattern;
                let suffix;
                if (starIndex > -1) {
                    prefix = pattern.slice(0, starIndex);
                    if (starIndex < pattern.length - 1) {
                        suffix = pattern.slice(starIndex + 1);
                    }
                }
                (_a = this.patterns) !== null && _a !== void 0 ? _a : (this.patterns = []);
                this.patterns.push({
                    starIndex,
                    prefix,
                    suffix,
                    potentials: potentials.map((potential) => {
                        const potentialStarIndex = potential.indexOf('*');
                        if (potentialStarIndex === -1) {
                            return { hasStar: false, prefix: potential };
                        }
                        return {
                            hasStar: true,
                            prefix: potential.slice(0, potentialStarIndex),
                            suffix: potentialStarIndex < potential.length - 1
                                ? potential.slice(potentialStarIndex + 1)
                                : undefined,
                        };
                    }),
                });
            }
            // Sort patterns so that exact matches take priority then largest prefix match
            (_b = this.patterns) === null || _b === void 0 ? void 0 : _b.sort((a, b) => {
                if (a.starIndex === -1) {
                    return -1;
                }
                else if (b.starIndex === -1) {
                    return 1;
                }
                else {
                    return b.starIndex - a.starIndex;
                }
            });
        }
    }
    apply(resolver) {
        const target = resolver.ensureHook('resolve');
        // To support synchronous resolvers this hook cannot be promise based.
        // Webpack supports synchronous resolution with `tap` and `tapAsync` hooks.
        resolver
            .getHook('described-resolve')
            .tapAsync('TypeScriptPathsPlugin', (request, resolveContext, callback) => {
            var _a, _b;
            // Preprocessing of the options will ensure that `patterns` is either undefined or has elements to check
            if (!this.patterns) {
                callback();
                return;
            }
            if (!request || request.typescriptPathMapped) {
                callback();
                return;
            }
            const originalRequest = request.request || request.path;
            if (!originalRequest) {
                callback();
                return;
            }
            // Only work on Javascript/TypeScript issuers.
            if (!((_b = (_a = request === null || request === void 0 ? void 0 : request.context) === null || _a === void 0 ? void 0 : _a.issuer) === null || _b === void 0 ? void 0 : _b.match(/\.[cm]?[jt]sx?$/))) {
                callback();
                return;
            }
            switch (originalRequest[0]) {
                case '.':
                case '/':
                    // Relative or absolute requests are not mapped
                    callback();
                    return;
                case '!':
                    // Ignore all webpack special requests
                    if (originalRequest.length > 1 && originalRequest[1] === '!') {
                        callback();
                        return;
                    }
                    break;
            }
            // A generator is used to limit the amount of replacements requests that need to be created.
            // For example, if the first one resolves, any others are not needed and do not need
            // to be created.
            const requests = this.createReplacementRequests(request, originalRequest);
            const tryResolve = () => {
                const next = requests.next();
                if (next.done) {
                    callback();
                    return;
                }
                resolver.doResolve(target, next.value, '', resolveContext, (error, result) => {
                    if (error) {
                        callback(error);
                    }
                    else if (result) {
                        callback(undefined, result);
                    }
                    else {
                        tryResolve();
                    }
                });
            };
            tryResolve();
        });
    }
    *findReplacements(originalRequest) {
        if (!this.patterns) {
            return;
        }
        // check if any path mapping rules are relevant
        for (const { starIndex, prefix, suffix, potentials } of this.patterns) {
            let partial;
            if (starIndex === -1) {
                // No star means an exact match is required
                if (prefix === originalRequest) {
                    partial = '';
                }
            }
            else if (starIndex === 0 && !suffix) {
                // Everything matches a single wildcard pattern ("*")
                partial = originalRequest;
            }
            else if (!suffix) {
                // No suffix means the star is at the end of the pattern
                if (originalRequest.startsWith(prefix)) {
                    partial = originalRequest.slice(prefix.length);
                }
            }
            else {
                // Star was in the middle of the pattern
                if (originalRequest.startsWith(prefix) && originalRequest.endsWith(suffix)) {
                    partial = originalRequest.substring(prefix.length, originalRequest.length - suffix.length);
                }
            }
            // If request was not matched, move on to the next pattern
            if (partial === undefined) {
                continue;
            }
            // Create the full replacement values based on the original request and the potentials
            // for the successfully matched pattern.
            for (const { hasStar, prefix, suffix } of potentials) {
                let replacement = prefix;
                if (hasStar) {
                    replacement += partial;
                    if (suffix) {
                        replacement += suffix;
                    }
                }
                yield replacement;
            }
        }
    }
    *createReplacementRequests(request, originalRequest) {
        var _a;
        for (const replacement of this.findReplacements(originalRequest)) {
            const targetPath = path.resolve((_a = this.baseUrl) !== null && _a !== void 0 ? _a : '', replacement);
            // Resolution in the original callee location, but with the updated request
            // to point to the mapped target location.
            yield {
                ...request,
                request: targetPath,
                typescriptPathMapped: true,
            };
            // If there is no extension. i.e. the target does not refer to an explicit
            // file, then this is a candidate for module/package resolution.
            const canBeModule = path.extname(targetPath) === '';
            if (canBeModule) {
                // Resolution in the target location, preserving the original request.
                // This will work with the `resolve-in-package` resolution hook, supporting
                // package exports for e.g. locally-built APF libraries.
                yield {
                    ...request,
                    path: targetPath,
                    typescriptPathMapped: true,
                };
            }
        }
    }
}
exports.TypeScriptPathsPlugin = TypeScriptPathsPlugin;
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport * as path from 'path';\nimport { CompilerOptions } from 'typescript';\nimport type { Resolver } from 'webpack';\n\n// eslint-disable-next-line @typescript-eslint/no-empty-interface\nexport interface TypeScriptPathsPluginOptions extends Pick<CompilerOptions, 'paths' | 'baseUrl'> {}\n\n// Extract ResolverRequest type from Webpack types since it is not directly exported\ntype ResolverRequest = NonNullable<Parameters<Parameters<Resolver['resolve']>[4]>[2]>;\n\ninterface PathPluginResolverRequest extends ResolverRequest {\n  context?: {\n    issuer?: string;\n  };\n  typescriptPathMapped?: boolean;\n}\n\ninterface PathPattern {\n  starIndex: number;\n  prefix: string;\n  suffix?: string;\n  potentials: { hasStar: boolean; prefix: string; suffix?: string }[];\n}\n\nexport class TypeScriptPathsPlugin {\n  private baseUrl?: string;\n  private patterns?: PathPattern[];\n\n  constructor(options?: TypeScriptPathsPluginOptions) {\n    if (options) {\n      this.update(options);\n    }\n  }\n\n  /**\n   * Update the plugin with new path mapping option values.\n   * The options will also be preprocessed to reduce the overhead of individual resolve actions\n   * during a build.\n   *\n   * @param options The `paths` and `baseUrl` options from TypeScript's `CompilerOptions`.\n   */\n  update(options: TypeScriptPathsPluginOptions): void {\n    this.baseUrl = options.baseUrl;\n    this.patterns = undefined;\n\n    if (options.paths) {\n      for (const [pattern, potentials] of Object.entries(options.paths)) {\n        // Ignore any entries that would not result in a new mapping\n        if (potentials.length === 0 || potentials.every((potential) => potential === '*')) {\n          continue;\n        }\n\n        const starIndex = pattern.indexOf('*');\n        let prefix = pattern;\n        let suffix;\n        if (starIndex > -1) {\n          prefix = pattern.slice(0, starIndex);\n          if (starIndex < pattern.length - 1) {\n            suffix = pattern.slice(starIndex + 1);\n          }\n        }\n\n        this.patterns ??= [];\n        this.patterns.push({\n          starIndex,\n          prefix,\n          suffix,\n          potentials: potentials.map((potential) => {\n            const potentialStarIndex = potential.indexOf('*');\n            if (potentialStarIndex === -1) {\n              return { hasStar: false, prefix: potential };\n            }\n\n            return {\n              hasStar: true,\n              prefix: potential.slice(0, potentialStarIndex),\n              suffix:\n                potentialStarIndex < potential.length - 1\n                  ? potential.slice(potentialStarIndex + 1)\n                  : undefined,\n            };\n          }),\n        });\n      }\n\n      // Sort patterns so that exact matches take priority then largest prefix match\n      this.patterns?.sort((a, b) => {\n        if (a.starIndex === -1) {\n          return -1;\n        } else if (b.starIndex === -1) {\n          return 1;\n        } else {\n          return b.starIndex - a.starIndex;\n        }\n      });\n    }\n  }\n\n  apply(resolver: Resolver): void {\n    const target = resolver.ensureHook('resolve');\n\n    // To support synchronous resolvers this hook cannot be promise based.\n    // Webpack supports synchronous resolution with `tap` and `tapAsync` hooks.\n    resolver\n      .getHook('described-resolve')\n      .tapAsync(\n        'TypeScriptPathsPlugin',\n        (request: PathPluginResolverRequest, resolveContext, callback) => {\n          // Preprocessing of the options will ensure that `patterns` is either undefined or has elements to check\n          if (!this.patterns) {\n            callback();\n\n            return;\n          }\n\n          if (!request || request.typescriptPathMapped) {\n            callback();\n\n            return;\n          }\n\n          const originalRequest = request.request || request.path;\n          if (!originalRequest) {\n            callback();\n\n            return;\n          }\n\n          // Only work on Javascript/TypeScript issuers.\n          if (!request?.context?.issuer?.match(/\\.[cm]?[jt]sx?$/)) {\n            callback();\n\n            return;\n          }\n\n          switch (originalRequest[0]) {\n            case '.':\n            case '/':\n              // Relative or absolute requests are not mapped\n              callback();\n\n              return;\n            case '!':\n              // Ignore all webpack special requests\n              if (originalRequest.length > 1 && originalRequest[1] === '!') {\n                callback();\n\n                return;\n              }\n              break;\n          }\n\n          // A generator is used to limit the amount of replacements requests that need to be created.\n          // For example, if the first one resolves, any others are not needed and do not need\n          // to be created.\n          const requests = this.createReplacementRequests(request, originalRequest);\n\n          const tryResolve = () => {\n            const next = requests.next();\n            if (next.done) {\n              callback();\n\n              return;\n            }\n\n            resolver.doResolve(\n              target,\n              next.value,\n              '',\n              resolveContext,\n              (error: Error | null | undefined, result: ResolverRequest | null | undefined) => {\n                if (error) {\n                  callback(error);\n                } else if (result) {\n                  callback(undefined, result);\n                } else {\n                  tryResolve();\n                }\n              },\n            );\n          };\n\n          tryResolve();\n        },\n      );\n  }\n\n  *findReplacements(originalRequest: string): IterableIterator<string> {\n    if (!this.patterns) {\n      return;\n    }\n\n    // check if any path mapping rules are relevant\n    for (const { starIndex, prefix, suffix, potentials } of this.patterns) {\n      let partial;\n\n      if (starIndex === -1) {\n        // No star means an exact match is required\n        if (prefix === originalRequest) {\n          partial = '';\n        }\n      } else if (starIndex === 0 && !suffix) {\n        // Everything matches a single wildcard pattern (\"*\")\n        partial = originalRequest;\n      } else if (!suffix) {\n        // No suffix means the star is at the end of the pattern\n        if (originalRequest.startsWith(prefix)) {\n          partial = originalRequest.slice(prefix.length);\n        }\n      } else {\n        // Star was in the middle of the pattern\n        if (originalRequest.startsWith(prefix) && originalRequest.endsWith(suffix)) {\n          partial = originalRequest.substring(\n            prefix.length,\n            originalRequest.length - suffix.length,\n          );\n        }\n      }\n\n      // If request was not matched, move on to the next pattern\n      if (partial === undefined) {\n        continue;\n      }\n\n      // Create the full replacement values based on the original request and the potentials\n      // for the successfully matched pattern.\n      for (const { hasStar, prefix, suffix } of potentials) {\n        let replacement = prefix;\n\n        if (hasStar) {\n          replacement += partial;\n          if (suffix) {\n            replacement += suffix;\n          }\n        }\n\n        yield replacement;\n      }\n    }\n  }\n\n  *createReplacementRequests(\n    request: PathPluginResolverRequest,\n    originalRequest: string,\n  ): IterableIterator<PathPluginResolverRequest> {\n    for (const replacement of this.findReplacements(originalRequest)) {\n      const targetPath = path.resolve(this.baseUrl ?? '', replacement);\n      // Resolution in the original callee location, but with the updated request\n      // to point to the mapped target location.\n      yield {\n        ...request,\n        request: targetPath,\n        typescriptPathMapped: true,\n      };\n\n      // If there is no extension. i.e. the target does not refer to an explicit\n      // file, then this is a candidate for module/package resolution.\n      const canBeModule = path.extname(targetPath) === '';\n      if (canBeModule) {\n        // Resolution in the target location, preserving the original request.\n        // This will work with the `resolve-in-package` resolution hook, supporting\n        // package exports for e.g. locally-built APF libraries.\n        yield {\n          ...request,\n          path: targetPath,\n          typescriptPathMapped: true,\n        };\n      }\n    }\n  }\n}\n"]}