astro/dist/core/preview/index.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

import fs from "node:fs";
import { createRequire } from "node:module";
import { fileURLToPath, pathToFileURL } from "node:url";
import { AstroIntegrationLogger } from "../logger/core.js";
import { telemetry } from "../../events/index.js";
import { eventCliSession } from "../../events/session.js";
import { runHookConfigDone, runHookConfigSetup } from "../../integrations/hooks.js";
import { resolveConfig } from "../config/config.js";
import { loadOrCreateNodeLogger } from "../logger/load.js";
import { createSettings } from "../config/settings.js";
import { createRoutesList } from "../routing/create-manifest.js";
import { getPrerenderDefault } from "../../prerender/utils.js";
import { ensureProcessNodeEnv } from "../util.js";
import createStaticPreviewServer from "./static-preview-server.js";
import { getResolvedHostForHttpServer } from "./util.js";
async function preview(inlineConfig) {
  ensureProcessNodeEnv("production");
  const { userConfig, astroConfig } = await resolveConfig(inlineConfig ?? {}, "preview");
  const logger = await loadOrCreateNodeLogger(astroConfig, inlineConfig ?? {});
  telemetry.record(eventCliSession("preview", userConfig));
  const _settings = await createSettings(
    astroConfig,
    inlineConfig.logLevel,
    fileURLToPath(astroConfig.root)
  );
  const settings = await runHookConfigSetup({
    settings: _settings,
    command: "preview",
    logger
  });
  await createRoutesList({ settings, cwd: inlineConfig.root }, logger);
  settings.buildOutput = getPrerenderDefault(settings.config) ? "static" : "server";
  await runHookConfigDone({ settings, logger, command: "preview" });
  if (settings.buildOutput === "static") {
    if (!fs.existsSync(settings.config.outDir)) {
      const outDirPath = fileURLToPath(settings.config.outDir);
      throw new Error(
        `[preview] The output directory ${outDirPath} does not exist. Did you run \`astro build\`?`
      );
    }
    const server2 = await createStaticPreviewServer(settings, logger);
    return server2;
  }
  if (!settings.adapter) {
    throw new Error(`[preview] No adapter found.`);
  }
  if (!settings.adapter.previewEntrypoint) {
    throw new Error(
      `[preview] The ${settings.adapter.name} adapter does not support the preview command.`
    );
  }
  const require2 = createRequire(settings.config.root);
  const previewEntrypointUrl = pathToFileURL(
    require2.resolve(settings.adapter.previewEntrypoint.toString())
  ).href;
  const previewModule = await import(previewEntrypointUrl);
  if (typeof previewModule.default !== "function") {
    throw new Error(`[preview] ${settings.adapter.name} cannot preview your app.`);
  }
  const server = await previewModule.default({
    outDir: settings.config.outDir,
    client: settings.config.build.client,
    server: settings.config.build.server,
    serverEntrypoint: new URL(settings.config.build.serverEntry, settings.config.build.server),
    host: getResolvedHostForHttpServer(settings.config.server.host),
    port: settings.config.server.port,
    base: settings.config.base,
    logger: new AstroIntegrationLogger(logger.options, settings.adapter.name),
    headers: settings.config.server.headers,
    allowedHosts: settings.config.server.allowedHosts,
    root: settings.config.root
  });
  return server;
}
export {
  preview as default
};