export interface PackageJSON {
    dependencies: {
        [key: string]: string;
    };
    devDependencies: {
        [key: string]: string;
    };
}
export interface DevYaml {
}
export interface RailgunHostnameWithProxy {
    [key: string]: {
        proxy_to_host_port: number;
    };
}
export declare type RailgunHostnameConfig = RailgunHostnameWithProxy | string;
export interface RailgunYaml {
    hostnames?: RailgunHostnameConfig[];
}
export interface DependencyInfo {
    has(dependency: string): boolean;
    get(dependency: string): string;
}
export declare class Gemfile {
    private contents;
    constructor(contents: string);
    hasDependency(gemName: string): boolean;
}
export declare class Project {
    gemfile: Gemfile | false;
    private packageJSON;
    private dependencies;
    private devYaml;
    private railgunYaml;
    hasPostCSSConfig: boolean;
    readonly hasProcfile: boolean;
    readonly hasServiceWorker: boolean;
    readonly isRails: boolean;
    readonly isNode: boolean;
    readonly usesDev: boolean;
    readonly usesTypeScript: boolean;
    readonly usesPolaris: boolean;
    readonly usesReact: boolean;
    readonly usesPreact: boolean;
    readonly usesPreactCompat: boolean;
    readonly devType: unknown;
    readonly devYamlPort: unknown;
    readonly devProxyHosts: {
        host: string;
        port: number;
    }[];
    readonly devPort: number | undefined;
    constructor(gemfile: Gemfile | false, packageJSON: PackageJSON, dependencies: DependencyInfo, devYaml: DevYaml | false, railgunYaml: RailgunYaml | false, hasPostCSSConfig: boolean, hasProcfile?: boolean, hasServiceWorker?: boolean);
    uses(dependency: string, versionCondition?: RegExp): boolean;
    version(dependency: string): string;
    hasDependency(dependency: string, versionCondition?: RegExp): boolean;
    hasDevDependency(dependency: string, versionCondition?: RegExp): boolean;
    readonly hasDevDependencies: number;
    hasGem(name: string): boolean;
    private getDevKey;
    private getRailgunKey;
}
export default function loadProject(root: string): Promise<Project>;
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