@angular/core
Version:
Angular - the core framework
89 lines • 13.9 kB
JavaScript
/**
* @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
*/
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define("@angular/core/schematics/migrations/wait-for-async", ["require", "exports", "@angular-devkit/schematics", "path", "typescript", "@angular/core/schematics/utils/project_tsconfig_paths", "@angular/core/schematics/utils/typescript/compiler_host", "@angular/core/schematics/utils/typescript/imports", "@angular/core/schematics/utils/typescript/nodes", "@angular/core/schematics/migrations/wait-for-async/util"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const schematics_1 = require("@angular-devkit/schematics");
const path_1 = require("path");
const ts = require("typescript");
const project_tsconfig_paths_1 = require("@angular/core/schematics/utils/project_tsconfig_paths");
const compiler_host_1 = require("@angular/core/schematics/utils/typescript/compiler_host");
const imports_1 = require("@angular/core/schematics/utils/typescript/imports");
const nodes_1 = require("@angular/core/schematics/utils/typescript/nodes");
const util_1 = require("@angular/core/schematics/migrations/wait-for-async/util");
const MODULE_AUGMENTATION_FILENAME = 'ɵɵASYNC_MIGRATION_CORE_AUGMENTATION.d.ts';
/** Migration that switches from `async` to `waitForAsync`. */
function default_1() {
return (tree) => {
const { buildPaths, testPaths } = project_tsconfig_paths_1.getProjectTsConfigPaths(tree);
const basePath = process.cwd();
const allPaths = [...buildPaths, ...testPaths];
if (!allPaths.length) {
throw new schematics_1.SchematicsException('Could not find any tsconfig file. Cannot migrate async usages to waitForAsync.');
}
for (const tsconfigPath of allPaths) {
runWaitForAsyncMigration(tree, tsconfigPath, basePath);
}
};
}
exports.default = default_1;
function runWaitForAsyncMigration(tree, tsconfigPath, basePath) {
// Technically we can get away with using `MODULE_AUGMENTATION_FILENAME` as the path, but as of
// TS 4.2, the module resolution caching seems to be more aggressive which causes the file to be
// retained between test runs. We can avoid it by using the full path.
const augmentedFilePath = path_1.join(basePath, MODULE_AUGMENTATION_FILENAME);
const { program } = compiler_host_1.createMigrationProgram(tree, tsconfigPath, basePath, fileName => {
// In case the module augmentation file has been requested, we return a source file that
// augments "@angular/core/testing" to include a named export called "async". This ensures that
// we can rely on the type checker for this migration after `async` has been removed.
if (path_1.basename(fileName) === MODULE_AUGMENTATION_FILENAME) {
return `
import '@angular/core/testing';
declare module "@angular/core/testing" {
function async(fn: Function): any;
}
`;
}
return undefined;
}, [augmentedFilePath]);
const typeChecker = program.getTypeChecker();
const printer = ts.createPrinter();
const sourceFiles = program.getSourceFiles().filter(sourceFile => compiler_host_1.canMigrateFile(basePath, sourceFile, program));
const deprecatedFunction = 'async';
const newFunction = 'waitForAsync';
sourceFiles.forEach(sourceFile => {
const asyncImportSpecifier = imports_1.getImportSpecifier(sourceFile, '@angular/core/testing', deprecatedFunction);
const asyncImport = asyncImportSpecifier ?
nodes_1.closestNode(asyncImportSpecifier, ts.SyntaxKind.NamedImports) :
null;
// If there are no imports for `async`, we can exit early.
if (!asyncImportSpecifier || !asyncImport) {
return;
}
const update = tree.beginUpdate(path_1.relative(basePath, sourceFile.fileName));
// Change the `async` import to `waitForAsync`.
update.remove(asyncImport.getStart(), asyncImport.getWidth());
update.insertRight(asyncImport.getStart(), printer.printNode(ts.EmitHint.Unspecified, imports_1.replaceImport(asyncImport, deprecatedFunction, newFunction), sourceFile));
// Change `async` calls to `waitForAsync`.
util_1.findAsyncReferences(sourceFile, typeChecker, asyncImportSpecifier).forEach(node => {
update.remove(node.getStart(), node.getWidth());
update.insertRight(node.getStart(), newFunction);
});
tree.commitUpdate(update);
});
}
});
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Cannot migrate async usages to waitForAsync.');\n    }\n\n    for (const tsconfigPath of allPaths) {\n      runWaitForAsyncMigration(tree, tsconfigPath, basePath);\n    }\n  };\n}\n\nfunction runWaitForAsyncMigration(tree: Tree, tsconfigPath: string, basePath: string) {\n  // Technically we can get away with using `MODULE_AUGMENTATION_FILENAME` as the path, but as of\n  // TS 4.2, the module resolution caching seems to be more aggressive which causes the file to be\n  // retained between test runs. We can avoid it by using the full path.\n  const augmentedFilePath = join(basePath, MODULE_AUGMENTATION_FILENAME);\n  const {program} = createMigrationProgram(tree, tsconfigPath, basePath, fileName => {\n    // In case the module augmentation file has been requested, we return a source file that\n    // augments \"@angular/core/testing\" to include a named export called \"async\". This ensures that\n    // we can rely on the type checker for this migration after `async` has been removed.\n    if (basename(fileName) === MODULE_AUGMENTATION_FILENAME) {\n      return `\n        import '@angular/core/testing';\n        declare module \"@angular/core/testing\" {\n          function async(fn: Function): any;\n        }\n      `;\n    }\n    return undefined;\n  }, [augmentedFilePath]);\n  const typeChecker = program.getTypeChecker();\n  const printer = ts.createPrinter();\n  const sourceFiles =\n      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));\n  const deprecatedFunction = 'async';\n  const newFunction = 'waitForAsync';\n\n  sourceFiles.forEach(sourceFile => {\n    const asyncImportSpecifier =\n        getImportSpecifier(sourceFile, '@angular/core/testing', deprecatedFunction);\n    const asyncImport = asyncImportSpecifier ?\n        closestNode<ts.NamedImports>(asyncImportSpecifier, ts.SyntaxKind.NamedImports) :\n        null;\n\n    // If there are no imports for `async`, we can exit early.\n    if (!asyncImportSpecifier || !asyncImport) {\n      return;\n    }\n\n    const update = tree.beginUpdate(relative(basePath, sourceFile.fileName));\n\n    // Change the `async` import to `waitForAsync`.\n    update.remove(asyncImport.getStart(), asyncImport.getWidth());\n    update.insertRight(\n        asyncImport.getStart(),\n        printer.printNode(\n            ts.EmitHint.Unspecified, replaceImport(asyncImport, deprecatedFunction, newFunction),\n            sourceFile));\n\n    // Change `async` calls to `waitForAsync`.\n    findAsyncReferences(sourceFile, typeChecker, asyncImportSpecifier).forEach(node => {\n      update.remove(node.getStart(), node.getWidth());\n      update.insertRight(node.getStart(), newFunction);\n    });\n\n    tree.commitUpdate(update);\n  });\n}\n"]}