/
transformation.ts
155 lines (137 loc) · 4.76 KB
/
transformation.ts
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/**
* @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
*/
import * as ts from 'typescript';
import { elideImports } from '../transformers/elide_imports';
import { removeIvyJitSupportCalls } from '../transformers/remove-ivy-jit-support-calls';
import { replaceResources } from '../transformers/replace_resources';
export function createAotTransformers(
builder: ts.BuilderProgram,
options: { emitClassMetadata?: boolean; emitNgModuleScope?: boolean },
): ts.CustomTransformers {
const getTypeChecker = () => builder.getProgram().getTypeChecker();
const transformers: ts.CustomTransformers = {
before: [replaceBootstrap(getTypeChecker)],
after: [],
};
const removeClassMetadata = !options.emitClassMetadata;
const removeNgModuleScope = !options.emitNgModuleScope;
if (removeClassMetadata || removeNgModuleScope) {
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
transformers.before!.push(
removeIvyJitSupportCalls(removeClassMetadata, removeNgModuleScope, getTypeChecker),
);
}
return transformers;
}
export function createJitTransformers(
builder: ts.BuilderProgram,
compilerCli: typeof import('@angular/compiler-cli'),
options: {
directTemplateLoading?: boolean;
inlineStyleFileExtension?: string;
},
): ts.CustomTransformers {
const getTypeChecker = () => builder.getProgram().getTypeChecker();
return {
before: [
replaceResources(
() => true,
getTypeChecker,
options.directTemplateLoading,
options.inlineStyleFileExtension,
),
compilerCli.constructorParametersDownlevelTransform(builder.getProgram()),
],
};
}
export function mergeTransformers(
first: ts.CustomTransformers,
second: ts.CustomTransformers,
): ts.CustomTransformers {
const result: ts.CustomTransformers = {};
if (first.before || second.before) {
result.before = [...(first.before || []), ...(second.before || [])];
}
if (first.after || second.after) {
result.after = [...(first.after || []), ...(second.after || [])];
}
if (first.afterDeclarations || second.afterDeclarations) {
result.afterDeclarations = [
...(first.afterDeclarations || []),
...(second.afterDeclarations || []),
];
}
return result;
}
export function replaceBootstrap(
getTypeChecker: () => ts.TypeChecker,
): ts.TransformerFactory<ts.SourceFile> {
return (context: ts.TransformationContext) => {
let bootstrapImport: ts.ImportDeclaration | undefined;
let bootstrapNamespace: ts.Identifier | undefined;
const replacedNodes: ts.Node[] = [];
const nodeFactory = context.factory;
const visitNode: ts.Visitor = (node: ts.Node) => {
if (ts.isCallExpression(node) && ts.isIdentifier(node.expression)) {
const target = node.expression;
if (target.text === 'platformBrowserDynamic') {
if (!bootstrapNamespace) {
bootstrapNamespace = nodeFactory.createUniqueName('__NgCli_bootstrap_');
bootstrapImport = nodeFactory.createImportDeclaration(
undefined,
undefined,
nodeFactory.createImportClause(
false,
undefined,
nodeFactory.createNamespaceImport(bootstrapNamespace),
),
nodeFactory.createStringLiteral('@angular/platform-browser'),
);
}
replacedNodes.push(target);
return nodeFactory.updateCallExpression(
node,
nodeFactory.createPropertyAccessExpression(bootstrapNamespace, 'platformBrowser'),
node.typeArguments,
node.arguments,
);
}
}
return ts.visitEachChild(node, visitNode, context);
};
return (sourceFile: ts.SourceFile) => {
let updatedSourceFile = ts.visitEachChild(sourceFile, visitNode, context);
if (bootstrapImport) {
// Remove any unused platform browser dynamic imports
const removals = elideImports(
updatedSourceFile,
replacedNodes,
getTypeChecker,
context.getCompilerOptions(),
);
if (removals.size > 0) {
updatedSourceFile = ts.visitEachChild(
updatedSourceFile,
(node) => (removals.has(node) ? undefined : node),
context,
);
}
// Add new platform browser import
return nodeFactory.updateSourceFile(
updatedSourceFile,
ts.setTextRange(
nodeFactory.createNodeArray([bootstrapImport, ...updatedSourceFile.statements]),
sourceFile.statements,
),
);
} else {
return updatedSourceFile;
}
};
};
}