Add computeSha1 option

CHANGELOG.md

@@ -29,6 +29,7 @@
 - `[jest-util]` Add `jest.getTimerCount()` to get the count of scheduled fake timers ([#7285](https://github.com/facebook/jest/pull/7285))
 - `[jest-config]` Add `dependencyExtractor` option to use a custom module to extract dependencies from files ([#7313](https://github.com/facebook/jest/pull/7313))
 - `[jest-haste-map]` [**BREAKING**] Expose relative paths when getting the file iterator ([#7321](https://github.com/facebook/jest/pull/7321))
+- `[jest-config]` Add `haste.computeSha1` option to compute the sha-1 of the files in the haste map  ([#](https://github.com/facebook/jest/pull/))
 
 ### Fixes
 

packages/jest-config/src/Defaults.js

@@ -41,6 +41,7 @@ export default ({
   globalTeardown: null,
   globals: {},
   haste: {
+    computeSha1: false,
     providesModuleNodeModules: [],
   },
   moduleDirectories: ['node_modules'],

packages/jest-config/src/ValidConfig.js

@@ -51,6 +51,7 @@ export default ({
   globalTeardown: 'teardown.js',
   globals: {__DEV__: true},
   haste: {
+    computeSha1: true,
     defaultPlatform: 'ios',
     hasteImplModulePath: '<rootDir>/haste_impl.js',
     platforms: ['ios', 'android'],

packages/jest-runtime/src/index.js

@@ -236,6 +236,7 @@ class Runtime {
 
     return new HasteMap({
       cacheDirectory: config.cacheDirectory,
+      computeSha1: config.haste.computeSha1,
       console: options && options.console,
       dependencyExtractor: config.dependencyExtractor,
       extensions: [Snapshot.EXTENSION].concat(config.moduleFileExtensions),

types/Config.js

@@ -11,6 +11,7 @@ export type Path = string;
 export type Glob = string;
 
 export type HasteConfig = {|
+  computeSha1?: boolean,
   defaultPlatform?: ?string,
   hasteImplModulePath?: string,
   platforms?: Array<string>,