Renames fetchMetroConfig into loadMetroConfig

Reviewed By: davidaurelio

Differential Revision: D6834104

fbshipit-source-id: fc8e9300dd43b2212c067595063fc2f98dbc8e3b

packages/metro/src/cli-utils.js

@@ -12,19 +12,7 @@
 
 'use strict';
 
-const Config = require('./Config');
-
 const fs = require('fs-extra');
-const path = require('path');
-
-import type {ConfigT} from './Config';
-
-const METRO_CONFIG_FILENAME = 'metro.config.js';
-
-type MetroConfigSearchOptions = {|
-  cwd?: string,
-  basename?: string,
-|};
 
 exports.watchFile = async function(
   filename: string,
@@ -37,49 +25,6 @@ exports.watchFile = async function(
   await callback();
 };
 
-exports.findMetroConfig = async function(
-  filename: ?string,
-  {
-    cwd = process.cwd(),
-    basename = METRO_CONFIG_FILENAME,
-  }: MetroConfigSearchOptions = {},
-): Promise<?string> {
-  if (filename) {
-    return path.resolve(cwd, filename);
-  } else {
-    let previous;
-    let current = cwd;
-
-    do {
-      const filename = path.join(current, basename);
-
-      if (fs.existsSync(filename)) {
-        return filename;
-      }
-
-      previous = current;
-      current = path.dirname(current);
-    } while (previous !== current);
-
-    return null;
-  }
-};
-
-exports.fetchMetroConfig = async function(
-  filename: ?string,
-  // $FlowFixMe: This is a known Flow issue where it doesn't detect that an empty object is a valid value for a strict shape where all the members are optionals
-  searchOptions: MetroConfigSearchOptions = {},
-): Promise<ConfigT> {
-  const location = await exports.findMetroConfig(filename, searchOptions);
-
-  // $FlowFixMe: We want this require to be dynamic
-  const config = location ? require(location) : null;
-
-  // $FlowFixMe: For some reason, Flow doesn't recognize the return value as a promise
-  return config ? Config.normalize(config) : Config.DEFAULT;
-};
-
-// eslint-disable-next-line no-unclear-flowtypes
 exports.makeAsyncCommand = (command: (argv: any) => Promise<*>) => (
   // eslint-disable-next-line no-unclear-flowtypes
   argv: any,

packages/metro/src/commands/build.js

@@ -16,7 +16,7 @@ const MetroApi = require('..');
 
 const os = require('os');
 
-const {fetchMetroConfig, makeAsyncCommand} = require('../cli-utils');
+const {makeAsyncCommand} = require('../cli-utils');
 
 import typeof Yargs from 'yargs';
 
@@ -56,7 +56,7 @@ exports.builder = (yargs: Yargs) => {
 // eslint-disable-next-line no-unclear-flowtypes
 exports.handler = makeAsyncCommand(async (argv: any) => {
   // $FlowFixMe: Flow + Promises don't work consistently https://fb.facebook.com/groups/flow/permalink/1772334656148475/
-  const config = await fetchMetroConfig(argv.config);
+  const config = await MetroApi.loadMetroConfig(argv.config);
 
   if (argv.projectRoots) {
     config.getProjectRoots = () => argv.projectRoots;

packages/metro/src/commands/serve.js

@@ -16,12 +16,7 @@ const MetroApi = require('..');
 
 const os = require('os');
 
-const {
-  findMetroConfig,
-  fetchMetroConfig,
-  watchFile,
-  makeAsyncCommand,
-} = require('../cli-utils');
+const {watchFile, makeAsyncCommand} = require('../cli-utils');
 const {promisify} = require('util');
 
 import typeof Yargs from 'yargs';
@@ -74,7 +69,7 @@ exports.handler = makeAsyncCommand(async (argv: any) => {
     }
 
     // $FlowFixMe: Flow + Promises don't work consistently https://fb.facebook.com/groups/flow/permalink/1772334656148475/
-    const config = await fetchMetroConfig(argv.config);
+    const config = await MetroApi.loadMetroConfig(argv.config);
 
     if (argv.projectRoots) {
       config.getProjectRoots = () => argv.projectRoots;
@@ -88,7 +83,7 @@ exports.handler = makeAsyncCommand(async (argv: any) => {
     restarting = false;
   }
 
-  const metroConfigLocation = await findMetroConfig(argv.config);
+  const metroConfigLocation = await MetroApi.findMetroConfig(argv.config);
 
   if (metroConfigLocation) {
     await watchFile(metroConfigLocation, restart);

packages/metro/src/index.js

@@ -13,8 +13,6 @@
 'use strict';
 
 const Config = require('./Config');
-const Http = require('http');
-const Https = require('https');
 const MetroBundler = require('./shared/output/bundle');
 const MetroHmrServer = require('./HmrServer');
 const MetroServer = require('./Server');
@@ -23,6 +21,10 @@ const TransformCaching = require('./lib/TransformCaching');
 
 const attachWebsocketServer = require('./lib/attachWebsocketServer');
 const defaults = require('./defaults');
+const fs = require('fs');
+const http = require('http');
+const https = require('https');
+const path = require('path');
 
 const {realpath} = require('fs');
 const {readFile} = require('fs-extra');
@@ -32,13 +34,11 @@ import type {ConfigT} from './Config';
 import type {Reporter} from './lib/reporting';
 import type {RequestOptions, OutputOptions} from './shared/types.flow.js';
 import type {Options as ServerOptions} from './shared/types.flow';
-import type {Server as HttpServer, IncomingMessage, ServerResponse} from 'http';
+import type {Server as HttpServer} from 'http';
 import type {Server as HttpsServer} from 'https';
 
 export type {ConfigT} from './Config';
 
-type Middleware = (IncomingMessage, ServerResponse, ?() => mixed) => mixed;
-
 type PublicMetroOptions = {|
   config?: ConfigT,
   maxWorkers?: number,
@@ -53,6 +53,13 @@ type PrivateMetroOptions = {|
   watch?: boolean,
 |};
 
+type MetroConfigSearchOptions = {|
+  cwd?: string,
+  basename?: string,
+|};
+
+const METRO_CONFIG_FILENAME = 'metro.config.js';
+
 // We'll be able to remove this to use the one provided by modern versions of
 // fs-extra once https://github.com/jprichardson/node-fs-extra/pull/520 will
 // have been merged (until then, they'll break on devservers/Sandcastle)
@@ -223,7 +230,7 @@ exports.runServer = async (options: RunServerOptions) => {
   let httpServer;
 
   if (options.secure) {
-    httpServer = Https.createServer(
+    httpServer = https.createServer(
       {
         key: await readFile(options.secureKey),
         cert: await readFile(options.secureCert),
@@ -231,7 +238,7 @@ exports.runServer = async (options: RunServerOptions) => {
       serverApp,
     );
   } else {
-    httpServer = Http.createServer(serverApp);
+    httpServer = http.createServer(serverApp);
   }
 
   if (options.hmrEnabled) {
@@ -303,6 +310,47 @@ exports.runBuild = async (options: RunBuildOptions) => {
   return {metroServer, metroBundle};
 };
 
+exports.findMetroConfig = function(
+  filename: ?string,
+  {
+    cwd = process.cwd(),
+    basename = METRO_CONFIG_FILENAME,
+  }: MetroConfigSearchOptions = {},
+): ?string {
+  if (filename) {
+    return path.resolve(cwd, filename);
+  } else {
+    let previous;
+    let current = cwd;
+
+    do {
+      const filename = path.join(current, basename);
+
+      if (fs.existsSync(filename)) {
+        return filename;
+      }
+
+      previous = current;
+      current = path.dirname(current);
+    } while (previous !== current);
+
+    return null;
+  }
+};
+
+exports.loadMetroConfig = function(
+  filename: ?string,
+  // $FlowFixMe: This is a known Flow issue where it doesn't detect that an empty object is a valid value for a strict shape where all the members are optionals
+  searchOptions: MetroConfigSearchOptions = {},
+): ConfigT {
+  const location = exports.findMetroConfig(filename, searchOptions);
+
+  // $FlowFixMe: We want this require to be dynamic
+  const config = location ? require(location) : null;
+
+  return config ? Config.normalize(config) : Config.DEFAULT;
+};
+
 exports.Config = Config;
 exports.defaults = defaults;