Function resolveServerOptions

packages/vite/src/node/server/index.ts:1207–1337

(
  root: string,
  raw: ServerOptions | undefined,
  logger: Logger,
)

const RESERVED_ALLOWED_HOSTS_CHARACTERS_RE = /[\\"']/

export async function resolveServerOptions(
  root: string,
  raw: ServerOptions | undefined,
  logger: Logger,
): Promise<ResolvedServerOptions> {
  const _server = mergeWithDefaults(
    {
      ..._serverConfigDefaults,
      host: undefined, // do not set here to detect whether host is set or not
      sourcemapIgnoreList: isInNodeModules,
    },
    raw ?? {},
  )

  setupHmrWsOptionCompat(_server)

  const workspaceRoot = searchForWorkspaceRoot(root)
  const server: ResolvedServerOptions = {
    ..._server,
    fs: {
      ..._server.fs,
      // run searchForWorkspaceRoot only if needed
      allow: raw?.fs?.allow ?? [workspaceRoot],
    },
    sourcemapIgnoreList:
      _server.sourcemapIgnoreList === false
        ? () => false
        : _server.sourcemapIgnoreList,
    forwardConsole: await resolveForwardConsoleOptions(_server.forwardConsole),
  }

  let allowDirs = server.fs.allow

  const cwd = searchForPackageRoot(root)
  if (process.versions.pnp) {
    // running a command fails if cwd doesn't exist and root may not exist
    // search for package root to find a path that exists
    try {
      const enableGlobalCache =
        execSync('yarn config get enableGlobalCache', { cwd })
          .toString()
          .trim() === 'true'
      const yarnCacheDir = execSync(
        `yarn config get ${enableGlobalCache ? 'globalFolder' : 'cacheFolder'}`,
        { cwd },
      )
        .toString()
        .trim()
      allowDirs.push(yarnCacheDir)
    } catch (e) {
      logger.warn(`Get yarn cache dir error: ${e.message}`, {
        timestamp: true,
      })
    }
  }

  // pnpm's global virtual store (GVS) may place package files outside workspace root.
  // Read node_modules/.modules.yaml which pnpm always writes on install — this works