import { Configuration } from './Configuration';
export interface ConfigFile {
    readonly path: string;
    readonly format: 'json' | 'yaml' | 'yml';
    readonly content: any;
}
export declare class ConfigLoader {
    private static readonly CONFIG_FILE_NAMES;
    private static readonly CONFIG_DIRS;
    static loadConfiguration(configPath?: string): Promise<Configuration>;
    static saveConfiguration(config: Configuration, configPath: string): Promise<void>;
    static validateConfiguration(config: Configuration): Promise<{
        readonly isValid: boolean;
        readonly errors: string[];
        readonly warnings: string[];
    }>;
    private static findConfigFile;
    private static loadConfigFile;
    private static substituteEnvironmentVariables;
    private static parseConfiguration;
    private static loadFromEnvironment;
}
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