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"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 __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.SchematicEngineHost = void 0;
const schematics_1 = require("@angular-devkit/schematics");
const tools_1 = require("@angular-devkit/schematics/tools");
const fs_1 = require("fs");
const jsonc_parser_1 = require("jsonc-parser");
const module_1 = __importDefault(require("module"));
const path_1 = require("path");
const vm_1 = require("vm");
/**
* Environment variable to control schematic package redirection
* Default: Angular schematics only
*/
const schematicRedirectVariable = (_a = process.env['NG_SCHEMATIC_REDIRECT']) === null || _a === void 0 ? void 0 : _a.toLowerCase();
function shouldWrapSchematic(schematicFile) {
// Check environment variable if present
if (schematicRedirectVariable !== undefined) {
switch (schematicRedirectVariable) {
case '0':
case 'false':
case 'off':
case 'none':
return false;
case 'all':
return true;
}
}
const normalizedSchematicFile = schematicFile.replace(/\\/g, '/');
// Never wrap the internal update schematic when executed directly
// It communicates with the update command via `global`
// But we still want to redirect schematics located in `@angular/cli/node_modules`.
if (normalizedSchematicFile.includes('node_modules/@angular/cli/') &&
!normalizedSchematicFile.includes('node_modules/@angular/cli/node_modules/')) {
return false;
}
// Default is only first-party Angular schematic packages
// Angular schematics are safe to use in the wrapped VM context
return /\/node_modules\/@(?:angular|schematics|nguniversal)\//.test(normalizedSchematicFile);
}
class SchematicEngineHost extends tools_1.NodeModulesEngineHost {
_resolveReferenceString(refString, parentPath) {
const [path, name] = refString.split('#', 2);
// Mimic behavior of ExportStringRef class used in default behavior
const fullPath = path[0] === '.' ? (0, path_1.resolve)(parentPath !== null && parentPath !== void 0 ? parentPath : process.cwd(), path) : path;
const schematicFile = require.resolve(fullPath, { paths: [parentPath] });
if (shouldWrapSchematic(schematicFile)) {
const schematicPath = (0, path_1.dirname)(schematicFile);
const moduleCache = new Map();
const factoryInitializer = wrap(schematicFile, schematicPath, moduleCache, name || 'default');
const factory = factoryInitializer();
if (!factory || typeof factory !== 'function') {
return null;
}
return { ref: factory, path: schematicPath };
}
// All other schematics use default behavior
return super._resolveReferenceString(refString, parentPath);
}
}
exports.SchematicEngineHost = SchematicEngineHost;
/**
* Minimal shim modules for legacy deep imports of `@schematics/angular`
*/
const legacyModules = {
'@schematics/angular/utility/config': {
getWorkspace(host) {
const path = '/.angular.json';
const data = host.read(path);
if (!data) {
throw new schematics_1.SchematicsException(`Could not find (${path})`);
}
return (0, jsonc_parser_1.parse)(data.toString(), [], { allowTrailingComma: true });
},
},
'@schematics/angular/utility/project': {
buildDefaultPath(project) {
const root = project.sourceRoot ? `/${project.sourceRoot}/` : `/${project.root}/src/`;
return `${root}${project.projectType === 'application' ? 'app' : 'lib'}`;
},
},
};
/**
* Wrap a JavaScript file in a VM context to allow specific Angular dependencies to be redirected.
* This VM setup is ONLY intended to redirect dependencies.
*
* @param schematicFile A JavaScript schematic file path that should be wrapped.
* @param schematicDirectory A directory that will be used as the location of the JavaScript file.
* @param moduleCache A map to use for caching repeat module usage and proper `instanceof` support.
* @param exportName An optional name of a specific export to return. Otherwise, return all exports.
*/
function wrap(schematicFile, schematicDirectory, moduleCache, exportName) {
const hostRequire = module_1.default.createRequire(__filename);
const schematicRequire = module_1.default.createRequire(schematicFile);
const customRequire = function (id) {
if (legacyModules[id]) {
// Provide compatibility modules for older versions of @angular/cdk
return legacyModules[id];
}
else if (id.startsWith('@angular-devkit/') || id.startsWith('@schematics/')) {
// Files should not redirect `@angular/core` and instead use the direct
// dependency if available. This allows old major version migrations to continue to function
// even though the latest major version may have breaking changes in `@angular/core`.
if (id.startsWith('@angular-devkit/core')) {
try {
return schematicRequire(id);
}
catch (e) {
if (e.code !== 'MODULE_NOT_FOUND') {
throw e;
}
}
}
// Resolve from inside the `@angular/cli` project
return hostRequire(id);
}
else if (id.startsWith('.') || id.startsWith('@angular/cdk')) {
// Wrap relative files inside the schematic collection
// Also wrap `@angular/cdk`, it contains helper utilities that import core schematic packages
// Resolve from the original file
const modulePath = schematicRequire.resolve(id);
// Use cached module if available
const cachedModule = moduleCache.get(modulePath);
if (cachedModule) {
return cachedModule;
}
// Do not wrap vendored third-party packages or JSON files
if (!/[/\\]node_modules[/\\]@schematics[/\\]angular[/\\]third_party[/\\]/.test(modulePath) &&
!modulePath.endsWith('.json')) {
// Wrap module and save in cache
const wrappedModule = wrap(modulePath, (0, path_1.dirname)(modulePath), moduleCache)();
moduleCache.set(modulePath, wrappedModule);
return wrappedModule;
}
}
// All others are required directly from the original file
return schematicRequire(id);
};
// Setup a wrapper function to capture the module's exports
const schematicCode = (0, fs_1.readFileSync)(schematicFile, 'utf8');
// `module` is required due to @angular/localize ng-add being in UMD format
const headerCode = '(function() {\nvar exports = {};\nvar module = { exports };\n';
const footerCode = exportName ? `\nreturn exports['${exportName}'];});` : '\nreturn exports;});';
const script = new vm_1.Script(headerCode + schematicCode + footerCode, {
filename: schematicFile,
lineOffset: 3,
});
const context = {
__dirname: schematicDirectory,
__filename: schematicFile,
Buffer,
console,
process,
get global() {
return this;
},
require: customRequire,
};
const exportsFactory = script.runInNewContext(context);
return exportsFactory;
}
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