import type * as vite from 'vite';
import type { RouteData } from '../../types/public/internal.js';
import type { AstroSettings } from '../../types/astro.js';
export interface CreateViteBuildConfigOptions {
    /** The resolved Astro settings. */
    settings: AstroSettings;
    /** The base Vite config produced by createVite(). */
    viteConfig: vite.InlineConfig;
    /** All routes to be built. */
    routes: RouteData[];
    /** Assembled Vite plugins (build plugins + user plugins). */
    plugins: vite.PluginOption[];
    /** The buildApp callback for the Vite builder. */
    builder: vite.BuilderOptions;
    /**
     * A function that checks whether a given module name is a rollup input.
     * Used by entryFileNames to determine the server entry.
     */
    isRollupInput: (moduleName: string | null) => boolean;
}
/**
 * Creates the Vite InlineConfig used for the multi-environment build.
 *
 * This is a pure config assembly function — it does not execute the build.
 * Extracted from `buildEnvironments()` to enable unit testing of config
 * merging behavior (e.g. user rollup output overrides).
 */
export declare function createViteBuildConfig(opts: CreateViteBuildConfigOptions): vite.InlineConfig;