parser.js

/**
 * @license
 * Copyright Google LLC
 *
 * 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 ts from 'typescript';
/**
 * Finds all module references in the specified source file.
 * @param node Source file which should be parsed.
 * @returns List of import specifiers in the source file.
 */
export function getModuleReferences(initialNode, ignoreTypeOnlyChecks) {
    const references = [];
    const visitNode = (node) => {
        if (ts.isImportDeclaration(node) || ts.isExportDeclaration(node)) {
            // When ignoreTypeOnlyChecks are enabled, if the declaration is found to be type only, it is skipped.
            if (ignoreTypeOnlyChecks &&
                ((ts.isImportDeclaration(node) && node.importClause?.isTypeOnly) ||
                    (ts.isExportDeclaration(node) && node.isTypeOnly))) {
                return;
            }
            if (node.moduleSpecifier !== undefined && ts.isStringLiteral(node.moduleSpecifier)) {
                references.push(node.moduleSpecifier.text);
            }
        }
        ts.forEachChild(node, visitNode);
    };
    ts.forEachChild(initialNode, visitNode);
    return references;
}
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