/// <reference types="node" />
import ProcessEnv = NodeJS.ProcessEnv;
export interface EnvContentParserOptions {
    /** If true, `parseEnvContent` returns variables defined by `export var=val` expression.
     *  Otherwise it returns `var=val` variables, too. */
    exportedOnly: boolean;
    /** `parseEnvContent` replaces `$PWD` with this value. */
    cwd: string;
    /** If defined, all variables in `predefined` exceeds over ones in the context.
     *  For instance, if a content has a line `var1=10` but `predefined` has `{var1: 20}`,
     *  `var1` will have `20` in the result. */
    predefined?: ProcessEnv;
}
/**
 * Parse env file's content and return zero or more of extracted variables.
 */
export declare function parseEnvContent(code: string, options: EnvContentParserOptions): ProcessEnv;