"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
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.createFormatDiagnosticHost = exports.createFileSystemCompilerHost = exports.FileSystemHost = void 0;
const ts = require("typescript");
/**
 * Implementation of a TypeScript parse config host that relies fully on
 * a given virtual file system.
 */
class FileSystemHost {
    _fileSystem;
    useCaseSensitiveFileNames = ts.sys.useCaseSensitiveFileNames;
    constructor(_fileSystem) {
        this._fileSystem = _fileSystem;
    }
    fileExists(path) {
        return this._fileSystem.fileExists(this._fileSystem.resolve(path));
    }
    readFile(path) {
        const content = this._fileSystem.read(this._fileSystem.resolve(path));
        if (content === null) {
            return undefined;
        }
        // Strip BOM as otherwise TSC methods (e.g. "getWidth") will return an offset which
        // which breaks the CLI UpdateRecorder. https://github.com/angular/angular/pull/30719
        return content.replace(/^\uFEFF/, '');
    }
    readDirectory(rootDir, extensions, excludes, includes, depth) {
        if (ts.matchFiles === undefined) {
            throw Error('Unable to read directory in virtual file system host. This means that ' +
                'TypeScript changed its file matching internals.\n\nPlease consider downgrading your ' +
                'TypeScript version, and report an issue in the Angular Components repository.');
        }
        return ts.matchFiles(rootDir, extensions, extensions, includes, this.useCaseSensitiveFileNames, '/', depth, p => this._getFileSystemEntries(p), p => this._fileSystem.resolve(p), p => this._fileSystem.directoryExists(this._fileSystem.resolve(p)));
    }
    _getFileSystemEntries(path) {
        return this._fileSystem.readDirectory(this._fileSystem.resolve(path));
    }
}
exports.FileSystemHost = FileSystemHost;
/**
 * Creates a TypeScript compiler host that fully relies fully on the given
 * virtual file system. i.e. no interactions with the working directory.
 */
function createFileSystemCompilerHost(options, fileSystem) {
    const host = ts.createCompilerHost(options, true);
    const virtualHost = new FileSystemHost(fileSystem);
    host.readFile = virtualHost.readFile.bind(virtualHost);
    host.readDirectory = virtualHost.readDirectory.bind(virtualHost);
    host.fileExists = virtualHost.fileExists.bind(virtualHost);
    host.directoryExists = dirPath => fileSystem.directoryExists(fileSystem.resolve(dirPath));
    host.getCurrentDirectory = () => '/';
    host.getCanonicalFileName = p => fileSystem.resolve(p);
    return host;
}
exports.createFileSystemCompilerHost = createFileSystemCompilerHost;
/** Creates a format diagnostic host that works with the given file system. */
function createFormatDiagnosticHost(fileSystem) {
    return {
        getCanonicalFileName: p => fileSystem.resolve(p),
        getCurrentDirectory: () => '/',
        getNewLine: () => '\n',
    };
}
exports.createFormatDiagnosticHost = createFormatDiagnosticHost;
//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"virtual-host.js","sourceRoot":"","sources":["../../../../../../../../src/cdk/schematics/update-tool/utils/virtual-host.ts"],"names":[],"mappings":";AAAA;;;;;;GAMG;;;AAEH,iCAAiC;AAgCjC;;;GAGG;AACH,MAAa,cAAc;IAGL;IAFpB,yBAAyB,GAAG,EAAE,CAAC,GAAG,CAAC,yBAAyB,CAAC;IAE7D,YAAoB,WAAuB;QAAvB,gBAAW,GAAX,WAAW,CAAY;IAAG,CAAC;IAE/C,UAAU,CAAC,IAAY;QACrB,OAAO,IAAI,CAAC,WAAW,CAAC,UAAU,CAAC,IAAI,CAAC,WAAW,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC;IACrE,CAAC;IAED,QAAQ,CAAC,IAAY;QACnB,MAAM,OAAO,GAAG,IAAI,CAAC,WAAW,CAAC,IAAI,CAAC,IAAI,CAAC,WAAW,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC;QACtE,IAAI,OAAO,KAAK,IAAI,EAAE;YACpB,OAAO,SAAS,CAAC;SAClB;QACD,mFAAmF;QACnF,qFAAqF;QACrF,OAAO,OAAO,CAAC,OAAO,CAAC,SAAS,EAAE,EAAE,CAAC,CAAC;IACxC,CAAC;IAED,aAAa,CACX,OAAe,EACf,UAAoB,EACpB,QAA8B,EAC9B,QAAkB,EAClB,KAAc;QAEd,IAAI,EAAE,CAAC,UAAU,KAAK,SAAS,EAAE;YAC/B,MAAM,KAAK,CACT,wEAAwE;gBACtE,sFAAsF;gBACtF,+EAA+E,CAClF,CAAC;SACH;QACD,OAAO,EAAE,CAAC,UAAU,CAClB,OAAO,EACP,UAAU,EACV,UAAU,EACV,QAAQ,EACR,IAAI,CAAC,yBAAyB,EAC9B,GAAG,EACH,KAAK,EACL,CAAC,CAAC,EAAE,CAAC,IAAI,CAAC,qBAAqB,CAAC,CAAC,CAAC,EAClC,CAAC,CAAC,EAAE,CAAC,IAAI,CAAC,WAAW,CAAC,OAAO,CAAC,CAAC,CAAC,EAChC,CAAC,CAAC,EAAE,CAAC,IAAI,CAAC,WAAW,CAAC,eAAe,CAAC,IAAI,CAAC,WAAW,CAAC,OAAO,CAAC,CAAC,CAAC,CAAC,CACnE,CAAC;IACJ,CAAC;IAEO,qBAAqB,CAAC,IAAY;QACxC,OAAO,IAAI,CAAC,WAAW,CAAC,aAAa,CAAC,IAAI,CAAC,WAAW,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC;IACxE,CAAC;CACF;AAlDD,wCAkDC;AAED;;;GAGG;AACH,SAAgB,4BAA4B,CAC1C,OAA2B,EAC3B,UAAsB;IAEtB,MAAM,IAAI,GAAG,EAAE,CAAC,kBAAkB,CAAC,OAAO,EAAE,IAAI,CAAC,CAAC;IAClD,MAAM,WAAW,GAAG,IAAI,cAAc,CAAC,UAAU,CAAC,CAAC;IAEnD,IAAI,CAAC,QAAQ,GAAG,WAAW,CAAC,QAAQ,CAAC,IAAI,CAAC,WAAW,CAAC,CAAC;IACvD,IAAI,CAAC,aAAa,GAAG,WAAW,CAAC,aAAa,CAAC,IAAI,CAAC,WAAW,CAAC,CAAC;IACjE,IAAI,CAAC,UAAU,GAAG,WAAW,CAAC,UAAU,CAAC,IAAI,CAAC,WAAW,CAAC,CAAC;IAC3D,IAAI,CAAC,eAAe,GAAG,OAAO,CAAC,EAAE,CAAC,UAAU,CAAC,eAAe,CAAC,UAAU,CAAC,OAAO,CAAC,OAAO,CAAC,CAAC,CAAC;IAC1F,IAAI,CAAC,mBAAmB,GAAG,GAAG,EAAE,CAAC,GAAG,CAAC;IACrC,IAAI,CAAC,oBAAoB,GAAG,CAAC,CAAC,EAAE,CAAC,UAAU,CAAC,OAAO,CAAC,CAAC,CAAC,CAAC;IAEvD,OAAO,IAAI,CAAC;AACd,CAAC;AAfD,oEAeC;AAED,8EAA8E;AAC9E,SAAgB,0BAA0B,CAAC,UAAsB;IAC/D,OAAO;QACL,oBAAoB,EAAE,CAAC,CAAC,EAAE,CAAC,UAAU,CAAC,OAAO,CAAC,CAAC,CAAC;QAChD,mBAAmB,EAAE,GAAG,EAAE,CAAC,GAAG;QAC9B,UAAU,EAAE,GAAG,EAAE,CAAC,IAAI;KACvB,CAAC;AACJ,CAAC;AAND,gEAMC","sourcesContent":["/**\n * @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 ts from 'typescript';\nimport {FileSystem} from '../file-system';\n\n// We use TypeScript's native `ts.matchFiles` utility for the virtual file system\n// hosts, as that function implements complex logic for matching files with respect\n// to root directory, extensions, excludes, includes etc. The function is currently\n// internal but we can use it as the API most likely will not change any time soon,\n// nor does it seem like this is being made public any time soon.\n// Related issue for tracking: https://github.com/microsoft/TypeScript/issues/13793.\n// https://github.com/microsoft/TypeScript/blob/b397d1fd4abd0edef85adf0afd91c030bb0b4955/src/compiler/utilities.ts#L6192\ndeclare module 'typescript' {\n  export interface FileSystemEntries {\n    readonly files: readonly string[];\n    readonly directories: readonly string[];\n  }\n\n  export const matchFiles:\n    | undefined\n    | ((\n        path: string,\n        extensions: readonly string[] | undefined,\n        excludes: readonly string[] | undefined,\n        includes: readonly string[] | undefined,\n        useCaseSensitiveFileNames: boolean,\n        currentDirectory: string,\n        depth: number | undefined,\n        getFileSystemEntries: (path: string) => FileSystemEntries,\n        realpath: (path: string) => string,\n        directoryExists: (path: string) => boolean,\n      ) => string[]);\n}\n\n/**\n * Implementation of a TypeScript parse config host that relies fully on\n * a given virtual file system.\n */\nexport class FileSystemHost implements ts.ParseConfigHost {\n  useCaseSensitiveFileNames = ts.sys.useCaseSensitiveFileNames;\n\n  constructor(private _fileSystem: FileSystem) {}\n\n  fileExists(path: string): boolean {\n    return this._fileSystem.fileExists(this._fileSystem.resolve(path));\n  }\n\n  readFile(path: string): string | undefined {\n    const content = this._fileSystem.read(this._fileSystem.resolve(path));\n    if (content === null) {\n      return undefined;\n    }\n    // Strip BOM as otherwise TSC methods (e.g. \"getWidth\") will return an offset which\n    // which breaks the CLI UpdateRecorder. https://github.com/angular/angular/pull/30719\n    return content.replace(/^\\uFEFF/, '');\n  }\n\n  readDirectory(\n    rootDir: string,\n    extensions: string[],\n    excludes: string[] | undefined,\n    includes: string[],\n    depth?: number,\n  ): string[] {\n    if (ts.matchFiles === undefined) {\n      throw Error(\n        'Unable to read directory in virtual file system host. This means that ' +\n          'TypeScript changed its file matching internals.\\n\\nPlease consider downgrading your ' +\n          'TypeScript version, and report an issue in the Angular Components repository.',\n      );\n    }\n    return ts.matchFiles(\n      rootDir,\n      extensions,\n      extensions,\n      includes,\n      this.useCaseSensitiveFileNames,\n      '/',\n      depth,\n      p => this._getFileSystemEntries(p),\n      p => this._fileSystem.resolve(p),\n      p => this._fileSystem.directoryExists(this._fileSystem.resolve(p)),\n    );\n  }\n\n  private _getFileSystemEntries(path: string): ts.FileSystemEntries {\n    return this._fileSystem.readDirectory(this._fileSystem.resolve(path));\n  }\n}\n\n/**\n * Creates a TypeScript compiler host that fully relies fully on the given\n * virtual file system. i.e. no interactions with the working directory.\n */\nexport function createFileSystemCompilerHost(\n  options: ts.CompilerOptions,\n  fileSystem: FileSystem,\n): ts.CompilerHost {\n  const host = ts.createCompilerHost(options, true);\n  const virtualHost = new FileSystemHost(fileSystem);\n\n  host.readFile = virtualHost.readFile.bind(virtualHost);\n  host.readDirectory = virtualHost.readDirectory.bind(virtualHost);\n  host.fileExists = virtualHost.fileExists.bind(virtualHost);\n  host.directoryExists = dirPath => fileSystem.directoryExists(fileSystem.resolve(dirPath));\n  host.getCurrentDirectory = () => '/';\n  host.getCanonicalFileName = p => fileSystem.resolve(p);\n\n  return host;\n}\n\n/** Creates a format diagnostic host that works with the given file system. */\nexport function createFormatDiagnosticHost(fileSystem: FileSystem): ts.FormatDiagnosticsHost {\n  return {\n    getCanonicalFileName: p => fileSystem.resolve(p),\n    getCurrentDirectory: () => '/',\n    getNewLine: () => '\\n',\n  };\n}\n"]}