import { Dictionary, Sequence } from '../collections';
import { Validation } from '../validation';
import { Exports } from './exports';
import { Installer } from './installers/Installer';
import { VersionReference } from './version-reference';
/**
 * These are the things that are necessary to install/set/depend-on/etc for a given 'artifact'
 */
export interface Demands extends Validation {
    /** set of required artifacts */
    requires: Dictionary<VersionReference>;
    /** An error message that the user should get, and abort the installation */
    error: string | undefined;
    /** A warning message that the user should get, does not abort the installation */
    warning: string | undefined;
    /** A text message that the user should get, does not abort the installation */
    message: string | undefined;
    /** settings that should be applied to the context when activated */
    exports: Exports;
    /**
     * defines what should be physically laid out on disk for this artifact
     *
     * Note: once the host/environment queries have been completed, there should
     *       only be one single package/file/repo/etc that gets downloaded and
     *       installed for this artifact.  If there needs to be more than one,
     *       then there would need to be a 'requires' that refers to the additional
     *       package.
     */
    install: Sequence<Installer>;
}
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