tsro/dist/modules/imports.js

TypeScript Remove Orphaned (tsro) is a CLI utility and library for TypeScript projects that detects and removes files containing invalid imports — imports that refer to nonexistent entities or nonexistent modules.

import ts from "typescript";
import { checkLib } from "../utils/checkLib.js";
import { getTsAliases } from "../utils/getTsAliases.js";
import { validateDefaultImport, validateNamedImports, validateNamespaceImport, } from "../utils/validators.js";
export const validateImportsInFile = (sourceFile, program, ignoreLibImports) => {
    const checker = program.getTypeChecker();
    const aliases = getTsAliases(program);
    const diagnostics = [];
    ts.forEachChild(sourceFile, (node) => {
        if (!ts.isImportDeclaration(node) || !ts.isStringLiteral(node.moduleSpecifier))
            return;
        const moduleSymbol = checker.getSymbolAtLocation(node.moduleSpecifier);
        const importPath = node.moduleSpecifier.text;
        const start = node.moduleSpecifier.getStart();
        const { line, character } = sourceFile.getLineAndCharacterOfPosition(start);
        if (!moduleSymbol) {
            diagnostics.push({
                file: sourceFile.fileName,
                code: `"${importPath}" not resolved`,
                line: line + 1,
                char: character + 1,
            });
            return;
        }
        const isLib = checkLib(importPath, aliases);
        if (isLib && ignoreLibImports) {
            return;
        }
        const exports = checker.getExportsOfModule(moduleSymbol);
        // Named imports
        diagnostics.push(...validateNamedImports(node, sourceFile, importPath, exports));
        // Default import
        diagnostics.push(...validateDefaultImport(node, sourceFile, importPath, exports));
        // Namespace import (import * as X from ...)
        diagnostics.push(...validateNamespaceImport(node, sourceFile, importPath, moduleSymbol));
    });
    return diagnostics;
};