Pass cacheVersion param via the new API

Reviewed By: BYK

Differential Revision: D6980337

fbshipit-source-id: 72c01136b6720390ffec8593f0375c8756dc1d4a

packages/metro/src/Config.js

@@ -32,6 +32,12 @@ type Middleware = (IncomingMessage, ServerResponse, ?() => mixed) => mixed;
 export type ConfigT = {
   assetRegistryPath: string,
 
+  /**
+   * Can be used to generate a key that will invalidate the whole metro cache
+   * (for example a global dependency version used by the transformer).
+   */
+  cacheVersion: string,
+
   /**
    * Called with the Metro middleware in parameter; can be used to wrap this
    * middleware inside another one
@@ -163,6 +169,7 @@ const DEFAULT = ({
   enhanceMiddleware: middleware => middleware,
   extraNodeModules: {},
   assetTransforms: false,
+  cacheVersion: '1.0',
   dynamicDepsInPackages: 'throwAtRuntime',
   getAssetExts: () => [],
   getBlacklistRE: () => blacklist(),

packages/metro/src/Server/index.js

@@ -121,7 +121,7 @@ class Server {
       assetExts: options.assetTransforms ? [] : assetExts,
       assetRegistryPath: options.assetRegistryPath,
       blacklistRE: options.blacklistRE,
-      cacheVersion: options.cacheVersion || '1.0',
+      cacheVersion: options.cacheVersion,
       dynamicDepsInPackages: options.dynamicDepsInPackages || 'throwAtRuntime',
       createModuleIdFactory: options.createModuleIdFactory,
       enableBabelRCLookup:

packages/metro/src/index.js

@@ -123,6 +123,7 @@ async function runMetro({
     assetExts: normalizedConfig.assetTransforms ? [] : assetExts,
     assetRegistryPath: normalizedConfig.assetRegistryPath,
     blacklistRE: normalizedConfig.getBlacklistRE(),
+    cacheVersion: normalizedConfig.cacheVersion,
     createModuleIdFactory: normalizedConfig.createModuleIdFactory,
     dynamicDepsInPackages: normalizedConfig.dynamicDepsInPackages,
     enableBabelRCLookup: normalizedConfig.getEnableBabelRCLookup(),

packages/metro/src/shared/types.flow.js

@@ -75,7 +75,7 @@ export type Options = {|
   +asyncRequireModulePath?: string,
   +assetRegistryPath: string,
   blacklistRE?: RegExp,
-  cacheVersion?: string,
+  cacheVersion: string,
   createModuleIdFactory?: () => (path: string) => number,
   +dynamicDepsInPackages: DynamicRequiresBehavior,
   enableBabelRCLookup: boolean,