import { ParseResult } from '@babel/parser';
import * as t from '@babel/types';
/**
 * Given an AST determines if the file needs to be compiled as CommonJS or ESM.
 * @param ast - The AST to analyze
 * @returns True if the file needs to be compiled as CommonJS, false if it needs to be compiled as ESM
 */
export declare function needsCJS({ ast, warnings, filepath, packageJson, tsconfigJson, }: {
    ast: ParseResult<t.File>;
    warnings: string[];
    filepath: string;
    packageJson?: {
        type?: string;
    };
    tsconfigJson?: {
        compilerOptions?: {
            module?: string;
        };
    };
}): boolean;