/**
 * Shared bundling orchestration for Pikku deploys.
 *
 * `BaseBundler` performs everything that is runtime-independent for each
 * deployment unit:
 * 1. Take a pre-generated entry point (provided by the deploy provider)
 * 2. Stub gen files / npm modules not needed by this unit
 * 3. Delegate the actual compile to a runtime backend (`compile`)
 * 4. Resolve external dependency versions into a minimal package.json
 * 5. Write all artifacts to `<outputDir>/<unit-name>/` and hash them
 *
 * The runtime-specific compile step lives in `NodeBundler` (esbuild) and
 * `BunBundler` (Bun.build); the right one is injected from `services.ts`.
 */
import type { DeploymentManifest, BundleOutput } from './types.js';
import type { Bundler, BundleUnitsOptions, CompileInput, CompileResult } from './bundler.interface.js';
/**
 * Runtime-independent bundling orchestration. Subclasses implement only
 * `compile` — the actual esbuild / Bun.build invocation.
 */
export declare abstract class BaseBundler implements Bundler {
    /**
     * Runtime-specific compile step: write `input.bundlePath` (and its `.map`
     * when `input.sourcemap`) and return the external packages + optional
     * metafile JSON.
     */
    protected abstract compile(input: CompileInput): Promise<CompileResult>;
    bundleUnits(projectDir: string, manifest: DeploymentManifest, entryFiles: Map<string, string>, outputDir?: string, options?: BundleUnitsOptions): Promise<BundleOutput>;
    private bundleUnit;
}