import { BaseImporter, Configuration, ImportedCompiledCssFile, ImportedFile, Importer, Syntax } from "@css-blocks/core";
import type { FS as MergedFileSystem } from "fs-merger";
export declare const IDENTIFIER_PREFIX = "broccoli-tree:";
export declare const EMBEDDED_DEFINITION_TAG = "#blockDefinitionURL";
export declare function isBroccoliTreeIdentifier(identifier: string | null): boolean;
export declare function identToPath(input: MergedFileSystem, identifier: string): string;
export declare function pathToIdent(relativePath: string): string;
/**
 * Knows how to import blocks from a broccoli merged filesystem interface.
 */
export declare class BroccoliTreeImporter extends BaseImporter {
    fallbackImporter: Importer;
    input: MergedFileSystem;
    namespace: string | null;
    constructor(input: MergedFileSystem, namespace: string | null, fallbackImporter: Importer);
    identifier(fromIdentifier: string | null, importPath: string, config: Readonly<Configuration>): string;
    import(identifier: string, config: Readonly<Configuration>): Promise<ImportedFile | ImportedCompiledCssFile>;
    importSync(identifier: string, config: Readonly<Configuration>): ImportedFile | ImportedCompiledCssFile;
    defaultName(identifier: string, configuration: Readonly<Configuration>): string;
    filesystemPath(identifier: string, config: Readonly<Configuration>): string | null;
    debugIdentifier(identifier: string, config: Readonly<Configuration>): string;
    syntax(identifier: string, config: Readonly<Configuration>): Syntax;
}
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