export declare const UNISTALLABLE_PACKAGE_ERROR_CODES: string[];
export declare class Npm {
    #private;
    private readonly workingDirectory;
    private readonly logger;
    constructor(workingDirectory: string, logger?: (message?: any, ...optionalParams: any[]) => void, npmCommand?: string);
    /**
     * Installs the designated package into this repository's working directory.
     *
     * @param target the name or path to the package that needs to be installed.
     * @param force whether to pass `--force` to `npm install`.
     *
     * @returns the name of the package that was installed.
     */
    install(target: string, force?: boolean): Promise<string>;
    private listOptionalPeerDeps;
    /**
     * Obtains the path to the npm command that should be run. This always returns
     * the path to an npm >= 7, which "correctly" handles peerDependencies. If the
     * npm version that's available in $PATH satisfies this predicate, this will
     * simply return `npm`.
     */
    private npmCommandPath;
    /**
     * Runs the supplied command with the provided arguments, captures the data
     * pushed to STDOUT, and "parses" it using `outputTransform` to produce a
     * result.
     *
     * You must consult the `exitCode` of the return value to determine whether
     * the command was successful or not. Use the `assertSuccess` function to
     * throw/reject in case the execution was not successful.
     *
     * @param command         the command to invoke.
     * @param args            arguments to provide to the command.
     * @param outputTransform the function that will parse STDOUT data.
     * @param options         additional `spawn` options, if necessary.
     */
    private runCommand;
}
/**
 * A filter to apply when selecting optional peer dependencies, based on how
 * their version target is specified.
 */
export declare enum OptionalPeerDepsFilter {
    /**
     * Ignore all optional peer dependencies when installing.
     */
    None = 0,
    /**
     * Install only optional peer dependencies specified as a version range, and
     * ignore those specified as a URL or local path.
     */
    VersionRange = 1,
    /**
     * Install all optional peer dependencies regardless of how they are
     * specified. This requires URL and local-path dependencies to be reachable.
     */
    All = 2
}