[6a3a178] | 1 | (function (factory) {
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| 2 | if (typeof module === "object" && typeof module.exports === "object") {
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| 3 | var v = factory(require, exports);
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| 4 | if (v !== undefined) module.exports = v;
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| 5 | }
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| 6 | else if (typeof define === "function" && define.amd) {
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| 7 | define("@angular/compiler-cli/ngcc/src/packages/source_file_cache", ["require", "exports", "typescript"], factory);
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| 8 | }
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| 9 | })(function (require, exports) {
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| 10 | "use strict";
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| 11 | Object.defineProperty(exports, "__esModule", { value: true });
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| 12 | exports.createModuleResolutionCache = exports.EntryPointFileCache = exports.isAngularDts = exports.isDefaultLibrary = exports.SharedFileCache = void 0;
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| 13 | /**
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| 14 | * @license
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| 15 | * Copyright Google LLC All Rights Reserved.
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| 16 | *
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| 17 | * Use of this source code is governed by an MIT-style license that can be
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| 18 | * found in the LICENSE file at https://angular.io/license
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| 19 | */
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| 20 | var ts = require("typescript");
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| 21 | /**
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| 22 | * A cache that holds on to source files that can be shared for processing all entry-points in a
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| 23 | * single invocation of ngcc. In particular, the following files are shared across all entry-points
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| 24 | * through this cache:
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| 25 | *
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| 26 | * 1. Default library files such as `lib.dom.d.ts` and `lib.es5.d.ts`. These files don't change
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| 27 | * and some are very large, so parsing is expensive. Therefore, the parsed `ts.SourceFile`s for
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| 28 | * the default library files are cached.
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| 29 | * 2. The typings of @angular scoped packages. The typing files for @angular packages are typically
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| 30 | * used in the entry-points that ngcc processes, so benefit from a single source file cache.
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| 31 | * Especially `@angular/core/core.d.ts` is large and expensive to parse repeatedly. In contrast
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| 32 | * to default library files, we have to account for these files to be invalidated during a single
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| 33 | * invocation of ngcc, as ngcc will overwrite the .d.ts files during its processing.
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| 34 | *
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| 35 | * The lifecycle of this cache corresponds with a single invocation of ngcc. Separate invocations,
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| 36 | * e.g. the CLI's synchronous module resolution fallback will therefore all have their own cache.
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| 37 | * This allows for the source file cache to be garbage collected once ngcc processing has completed.
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| 38 | */
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| 39 | var SharedFileCache = /** @class */ (function () {
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| 40 | function SharedFileCache(fs) {
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| 41 | this.fs = fs;
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| 42 | this.sfCache = new Map();
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| 43 | }
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| 44 | /**
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| 45 | * Loads a `ts.SourceFile` if the provided `fileName` is deemed appropriate to be cached. To
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| 46 | * optimize for memory usage, only files that are generally used in all entry-points are cached.
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| 47 | * If `fileName` is not considered to benefit from caching or the requested file does not exist,
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| 48 | * then `undefined` is returned.
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| 49 | */
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| 50 | SharedFileCache.prototype.getCachedSourceFile = function (fileName) {
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| 51 | var absPath = this.fs.resolve(fileName);
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| 52 | if (isDefaultLibrary(absPath, this.fs)) {
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| 53 | return this.getStableCachedFile(absPath);
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| 54 | }
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| 55 | else if (isAngularDts(absPath, this.fs)) {
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| 56 | return this.getVolatileCachedFile(absPath);
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| 57 | }
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| 58 | else {
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| 59 | return undefined;
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| 60 | }
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| 61 | };
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| 62 | /**
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| 63 | * Attempts to load the source file from the cache, or parses the file into a `ts.SourceFile` if
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| 64 | * it's not yet cached. This method assumes that the file will not be modified for the duration
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| 65 | * that this cache is valid for. If that assumption does not hold, the `getVolatileCachedFile`
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| 66 | * method is to be used instead.
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| 67 | */
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| 68 | SharedFileCache.prototype.getStableCachedFile = function (absPath) {
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| 69 | if (!this.sfCache.has(absPath)) {
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| 70 | var content = readFile(absPath, this.fs);
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| 71 | if (content === undefined) {
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| 72 | return undefined;
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| 73 | }
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| 74 | var sf = ts.createSourceFile(absPath, content, ts.ScriptTarget.ES2015);
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| 75 | this.sfCache.set(absPath, sf);
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| 76 | }
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| 77 | return this.sfCache.get(absPath);
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| 78 | };
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| 79 | /**
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| 80 | * In contrast to `getStableCachedFile`, this method always verifies that the cached source file
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| 81 | * is the same as what's stored on disk. This is done for files that are expected to change during
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| 82 | * ngcc's processing, such as @angular scoped packages for which the .d.ts files are overwritten
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| 83 | * by ngcc. If the contents on disk have changed compared to a previously cached source file, the
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| 84 | * content from disk is re-parsed and the cache entry is replaced.
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| 85 | */
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| 86 | SharedFileCache.prototype.getVolatileCachedFile = function (absPath) {
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| 87 | var content = readFile(absPath, this.fs);
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| 88 | if (content === undefined) {
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| 89 | return undefined;
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| 90 | }
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| 91 | if (!this.sfCache.has(absPath) || this.sfCache.get(absPath).text !== content) {
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| 92 | var sf = ts.createSourceFile(absPath, content, ts.ScriptTarget.ES2015);
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| 93 | this.sfCache.set(absPath, sf);
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| 94 | }
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| 95 | return this.sfCache.get(absPath);
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| 96 | };
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| 97 | return SharedFileCache;
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| 98 | }());
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| 99 | exports.SharedFileCache = SharedFileCache;
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| 100 | var DEFAULT_LIB_PATTERN = ['node_modules', 'typescript', 'lib', /^lib\..+\.d\.ts$/];
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| 101 | /**
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| 102 | * Determines whether the provided path corresponds with a default library file inside of the
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| 103 | * typescript package.
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| 104 | *
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| 105 | * @param absPath The path for which to determine if it corresponds with a default library file.
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| 106 | * @param fs The filesystem to use for inspecting the path.
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| 107 | */
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| 108 | function isDefaultLibrary(absPath, fs) {
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| 109 | return isFile(absPath, DEFAULT_LIB_PATTERN, fs);
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| 110 | }
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| 111 | exports.isDefaultLibrary = isDefaultLibrary;
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| 112 | var ANGULAR_DTS_PATTERN = ['node_modules', '@angular', /./, /\.d\.ts$/];
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| 113 | /**
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| 114 | * Determines whether the provided path corresponds with a .d.ts file inside of an @angular
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| 115 | * scoped package. This logic only accounts for the .d.ts files in the root, which is sufficient
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| 116 | * to find the large, flattened entry-point files that benefit from caching.
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| 117 | *
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| 118 | * @param absPath The path for which to determine if it corresponds with an @angular .d.ts file.
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| 119 | * @param fs The filesystem to use for inspecting the path.
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| 120 | */
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| 121 | function isAngularDts(absPath, fs) {
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| 122 | return isFile(absPath, ANGULAR_DTS_PATTERN, fs);
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| 123 | }
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| 124 | exports.isAngularDts = isAngularDts;
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| 125 | /**
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| 126 | * Helper function to determine whether a file corresponds with a given pattern of segments.
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| 127 | *
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| 128 | * @param path The path for which to determine if it corresponds with the provided segments.
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| 129 | * @param segments Array of segments; the `path` must have ending segments that match the
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| 130 | * patterns in this array.
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| 131 | * @param fs The filesystem to use for inspecting the path.
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| 132 | */
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| 133 | function isFile(path, segments, fs) {
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| 134 | for (var i = segments.length - 1; i >= 0; i--) {
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| 135 | var pattern = segments[i];
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| 136 | var segment = fs.basename(path);
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| 137 | if (typeof pattern === 'string') {
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| 138 | if (pattern !== segment) {
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| 139 | return false;
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| 140 | }
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| 141 | }
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| 142 | else {
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| 143 | if (!pattern.test(segment)) {
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| 144 | return false;
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| 145 | }
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| 146 | }
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| 147 | path = fs.dirname(path);
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| 148 | }
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| 149 | return true;
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| 150 | }
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| 151 | /**
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| 152 | * A cache for processing a single entry-point. This exists to share `ts.SourceFile`s between the
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| 153 | * source and typing programs that are created for a single program.
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| 154 | */
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| 155 | var EntryPointFileCache = /** @class */ (function () {
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| 156 | function EntryPointFileCache(fs, sharedFileCache) {
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| 157 | this.fs = fs;
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| 158 | this.sharedFileCache = sharedFileCache;
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| 159 | this.sfCache = new Map();
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| 160 | }
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| 161 | /**
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| 162 | * Returns and caches a parsed `ts.SourceFile` for the provided `fileName`. If the `fileName` is
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| 163 | * cached in the shared file cache, that result is used. Otherwise, the source file is cached
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| 164 | * internally. This method returns `undefined` if the requested file does not exist.
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| 165 | *
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| 166 | * @param fileName The path of the file to retrieve a source file for.
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| 167 | * @param languageVersion The language version to use for parsing the file.
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| 168 | */
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| 169 | EntryPointFileCache.prototype.getCachedSourceFile = function (fileName, languageVersion) {
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| 170 | var staticSf = this.sharedFileCache.getCachedSourceFile(fileName);
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| 171 | if (staticSf !== undefined) {
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| 172 | return staticSf;
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| 173 | }
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| 174 | var absPath = this.fs.resolve(fileName);
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| 175 | if (this.sfCache.has(absPath)) {
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| 176 | return this.sfCache.get(absPath);
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| 177 | }
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| 178 | var content = readFile(absPath, this.fs);
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| 179 | if (content === undefined) {
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| 180 | return undefined;
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| 181 | }
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| 182 | var sf = ts.createSourceFile(fileName, content, languageVersion);
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| 183 | this.sfCache.set(absPath, sf);
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| 184 | return sf;
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| 185 | };
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| 186 | return EntryPointFileCache;
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| 187 | }());
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| 188 | exports.EntryPointFileCache = EntryPointFileCache;
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| 189 | function readFile(absPath, fs) {
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| 190 | if (!fs.exists(absPath) || !fs.stat(absPath).isFile()) {
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| 191 | return undefined;
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| 192 | }
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| 193 | return fs.readFile(absPath);
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| 194 | }
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| 195 | /**
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| 196 | * Creates a `ts.ModuleResolutionCache` that uses the provided filesystem for path operations.
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| 197 | *
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| 198 | * @param fs The filesystem to use for path operations.
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| 199 | */
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| 200 | function createModuleResolutionCache(fs) {
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| 201 | return ts.createModuleResolutionCache(fs.pwd(), function (fileName) {
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| 202 | return fs.isCaseSensitive() ? fileName : fileName.toLowerCase();
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| 203 | });
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| 204 | }
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| 205 | exports.createModuleResolutionCache = createModuleResolutionCache;
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| 206 | });
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In particular, the following files are shared across all entry-points\n * through this cache:\n *\n * 1. Default library files such as `lib.dom.d.ts` and `lib.es5.d.ts`. These files don't change\n *    and some are very large, so parsing is expensive. Therefore, the parsed `ts.SourceFile`s for\n *    the default library files are cached.\n * 2. The typings of @angular scoped packages. The typing files for @angular packages are typically\n *    used in the entry-points that ngcc processes, so benefit from a single source file cache.\n *    Especially `@angular/core/core.d.ts` is large and expensive to parse repeatedly. In contrast\n *    to default library files, we have to account for these files to be invalidated during a single\n *    invocation of ngcc, as ngcc will overwrite the .d.ts files during its processing.\n *\n * The lifecycle of this cache corresponds with a single invocation of ngcc. Separate invocations,\n * e.g. the CLI's synchronous module resolution fallback will therefore all have their own cache.\n * This allows for the source file cache to be garbage collected once ngcc processing has completed.\n */\nexport class SharedFileCache {\n  private sfCache = new Map<AbsoluteFsPath, ts.SourceFile>();\n\n  constructor(private fs: ReadonlyFileSystem) {}\n\n  /**\n   * Loads a `ts.SourceFile` if the provided `fileName` is deemed appropriate to be cached. To\n   * optimize for memory usage, only files that are generally used in all entry-points are cached.\n   * If `fileName` is not considered to benefit from caching or the requested file does not exist,\n   * then `undefined` is returned.\n   */\n  getCachedSourceFile(fileName: string): ts.SourceFile|undefined {\n    const absPath = this.fs.resolve(fileName);\n    if (isDefaultLibrary(absPath, this.fs)) {\n      return this.getStableCachedFile(absPath);\n    } else if (isAngularDts(absPath, this.fs)) {\n      return this.getVolatileCachedFile(absPath);\n    } else {\n      return undefined;\n    }\n  }\n\n  /**\n   * Attempts to load the source file from the cache, or parses the file into a `ts.SourceFile` if\n   * it's not yet cached. This method assumes that the file will not be modified for the duration\n   * that this cache is valid for. If that assumption does not hold, the `getVolatileCachedFile`\n   * method is to be used instead.\n   */\n  private getStableCachedFile(absPath: AbsoluteFsPath): ts.SourceFile|undefined {\n    if (!this.sfCache.has(absPath)) {\n      const content = readFile(absPath, this.fs);\n      if (content === undefined) {\n        return undefined;\n      }\n      const sf = ts.createSourceFile(absPath, content, ts.ScriptTarget.ES2015);\n      this.sfCache.set(absPath, sf);\n    }\n    return this.sfCache.get(absPath)!;\n  }\n\n  /**\n   * In contrast to `getStableCachedFile`, this method always verifies that the cached source file\n   * is the same as what's stored on disk. This is done for files that are expected to change during\n   * ngcc's processing, such as @angular scoped packages for which the .d.ts files are overwritten\n   * by ngcc. If the contents on disk have changed compared to a previously cached source file, the\n   * content from disk is re-parsed and the cache entry is replaced.\n   */\n  private getVolatileCachedFile(absPath: AbsoluteFsPath): ts.SourceFile|undefined {\n    const content = readFile(absPath, this.fs);\n    if (content === undefined) {\n      return undefined;\n    }\n    if (!this.sfCache.has(absPath) || this.sfCache.get(absPath)!.text !== content) {\n      const sf = ts.createSourceFile(absPath, content, ts.ScriptTarget.ES2015);\n      this.sfCache.set(absPath, sf);\n    }\n    return this.sfCache.get(absPath)!;\n  }\n}\n\nconst DEFAULT_LIB_PATTERN = ['node_modules', 'typescript', 'lib', /^lib\\..+\\.d\\.ts$/];\n\n/**\n * Determines whether the provided path corresponds with a default library file inside of the\n * typescript package.\n *\n * @param absPath The path for which to determine if it corresponds with a default library file.\n * @param fs The filesystem to use for inspecting the path.\n */\nexport function isDefaultLibrary(absPath: AbsoluteFsPath, fs: ReadonlyFileSystem): boolean {\n  return isFile(absPath, DEFAULT_LIB_PATTERN, fs);\n}\n\nconst ANGULAR_DTS_PATTERN = ['node_modules', '@angular', /./, /\\.d\\.ts$/];\n\n/**\n * Determines whether the provided path corresponds with a .d.ts file inside of an @angular\n * scoped package. This logic only accounts for the .d.ts files in the root, which is sufficient\n * to find the large, flattened entry-point files that benefit from caching.\n *\n * @param absPath The path for which to determine if it corresponds with an @angular .d.ts file.\n * @param fs The filesystem to use for inspecting the path.\n */\nexport function isAngularDts(absPath: AbsoluteFsPath, fs: ReadonlyFileSystem): boolean {\n  return isFile(absPath, ANGULAR_DTS_PATTERN, fs);\n}\n\n/**\n * Helper function to determine whether a file corresponds with a given pattern of segments.\n *\n * @param path The path for which to determine if it corresponds with the provided segments.\n * @param segments Array of segments; the `path` must have ending segments that match the\n * patterns in this array.\n * @param fs The filesystem to use for inspecting the path.\n */\nfunction isFile(\n    path: AbsoluteFsPath, segments: ReadonlyArray<string|RegExp>, fs: ReadonlyFileSystem): boolean {\n  for (let i = segments.length - 1; i >= 0; i--) {\n    const pattern = segments[i];\n    const segment = fs.basename(path);\n    if (typeof pattern === 'string') {\n      if (pattern !== segment) {\n        return false;\n      }\n    } else {\n      if (!pattern.test(segment)) {\n        return false;\n      }\n    }\n    path = fs.dirname(path);\n  }\n  return true;\n}\n\n/**\n * A cache for processing a single entry-point. This exists to share `ts.SourceFile`s between the\n * source and typing programs that are created for a single program.\n */\nexport class EntryPointFileCache {\n  private readonly sfCache = new Map<AbsoluteFsPath, ts.SourceFile>();\n\n  constructor(private fs: ReadonlyFileSystem, private sharedFileCache: SharedFileCache) {}\n\n  /**\n   * Returns and caches a parsed `ts.SourceFile` for the provided `fileName`. If the `fileName` is\n   * cached in the shared file cache, that result is used. Otherwise, the source file is cached\n   * internally. This method returns `undefined` if the requested file does not exist.\n   *\n   * @param fileName The path of the file to retrieve a source file for.\n   * @param languageVersion The language version to use for parsing the file.\n   */\n  getCachedSourceFile(fileName: string, languageVersion: ts.ScriptTarget): ts.SourceFile|undefined {\n    const staticSf = this.sharedFileCache.getCachedSourceFile(fileName);\n    if (staticSf !== undefined) {\n      return staticSf;\n    }\n\n    const absPath = this.fs.resolve(fileName);\n    if (this.sfCache.has(absPath)) {\n      return this.sfCache.get(absPath);\n    }\n\n    const content = readFile(absPath, this.fs);\n    if (content === undefined) {\n      return undefined;\n    }\n    const sf = ts.createSourceFile(fileName, content, languageVersion);\n    this.sfCache.set(absPath, sf);\n    return sf;\n  }\n}\n\nfunction readFile(absPath: AbsoluteFsPath, fs: ReadonlyFileSystem): string|undefined {\n  if (!fs.exists(absPath) || !fs.stat(absPath).isFile()) {\n    return undefined;\n  }\n  return fs.readFile(absPath);\n}\n\n/**\n * Creates a `ts.ModuleResolutionCache` that uses the provided filesystem for path operations.\n *\n * @param fs The filesystem to use for path operations.\n */\nexport function createModuleResolutionCache(fs: ReadonlyFileSystem): ts.ModuleResolutionCache {\n  return ts.createModuleResolutionCache(fs.pwd(), fileName => {\n    return fs.isCaseSensitive() ? fileName : fileName.toLowerCase();\n  });\n}\n"]} |
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