/**
 * This module provides utility functions for parsing and handling dotenv files.
 */
export interface EnvKeyValue {
    key: string;
    value: string;
}
/** Strips a UTF-8 BOM from the start of the content, if present.
 * @param content - The content to strip the BOM from.
 * @returns The content without a BOM at the start.
 */
export declare function stripBom(content: string): string;
/** Splits dotenv content into lines, handling both LF and CRLF line endings.
 * @param content - The dotenv file content to split.
 * @returns An array of lines from the content.
 */
export declare function splitEnvLines(content: string): string[];
/**
 * Parses a single dotenv line into a key/value pair.
 * Returns null for empty lines, comments, or lines without a valid key.
 * @param line - The dotenv line to parse.
 * @returns An object with `key` and `value` properties, or null if the line is invalid.
 */
export declare function parseEnvLine(line: string): EnvKeyValue | null;
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