Use relative paths in haste map (#7020)

* Used relative paths in haste map
* Update changelog
* Use relative roots for the name of the cached haste map
* Improved performance of path manipulations
* Use rootDir in the haste map cache name

CHANGELOG.md

@@ -13,6 +13,7 @@
 
 - `[jest-each]` Add each array validation check ([#7033](https://github.com/facebook/jest/pull/7033))
 - `[jest-haste-map]` [**BREAKING**] Replace internal data structures to improve performance ([#6960](https://github.com/facebook/jest/pull/6960))
+- `[jest-haste-map]` Use relative paths to allow remote caching ([#7020](https://github.com/facebook/jest/pull/7020))
 - `[jest-haste-map]` Do not visit again files with the same sha-1 ([#6990](https://github.com/facebook/jest/pull/6990))
 - `[jest-jasmine2]` Fix memory leak in Error objects hold by the framework ([#6965](https://github.com/facebook/jest/pull/6965))
 - `[jest-haste-map]` Fixed Haste whitelist generation for scoped modules on Windows ([#6980](https://github.com/facebook/jest/pull/6980))

e2e/__tests__/haste_map_sha1.test.js

@@ -40,6 +40,7 @@ test('exits the process after test are done but before timers complete', async (
     name: 'tmp',
     platforms: ['ios', 'android'],
     retainAllFiles: true,
+    rootDir: DIR,
     roots: [DIR],
     useWatchman: false,
     watch: false,

packages/jest-haste-map/src/__tests__/__snapshots__/index.test.js.snap

@@ -3,23 +3,23 @@
 exports[`HasteMap file system changes processing recovery from duplicate module IDs recovers when the most recent duplicate is fixed 1`] = `
 "The name \`Pear\` was looked up in the Haste module map. It cannot be resolved, because there exists several different files, or packages, that provide a module for that particular name and platform. The platform is generic (no extension). You must delete or blacklist files until there remains only one of these:
 
-  * \`/fruits/blueberry.js\` (module)
-  * \`/fruits/pear.js\` (module)
+  * \`/project/fruits/blueberry.js\` (module)
+  * \`/project/fruits/pear.js\` (module)
 "
 `;
 
 exports[`HasteMap file system changes processing recovery from duplicate module IDs recovers when the oldest version of the duplicates is fixed 1`] = `
 "The name \`Pear\` was looked up in the Haste module map. It cannot be resolved, because there exists several different files, or packages, that provide a module for that particular name and platform. The platform is generic (no extension). You must delete or blacklist files until there remains only one of these:
 
-  * \`/fruits/blueberry.js\` (module)
-  * \`/fruits/pear.js\` (module)
+  * \`/project/fruits/blueberry.js\` (module)
+  * \`/project/fruits/pear.js\` (module)
 "
 `;
 
 exports[`HasteMap throws on duplicate module ids if "throwOnModuleCollision" is set to true 1`] = `
 [Error: jest-haste-map: @providesModule naming collision:
   Duplicate module name: Strawberry
-  Paths: /fruits/raspberry.js collides with /fruits/strawberry.js
+  Paths: /project/fruits/raspberry.js collides with /project/fruits/strawberry.js
 
 This error is caused by a @providesModule declaration with the same name across two different files.]
 `;
@@ -33,21 +33,21 @@ exports[`HasteMap tries to crawl using node as a fallback 1`] = `
 exports[`HasteMap warns on duplicate mock files 1`] = `
 "jest-haste-map: duplicate manual mock found:
   Module name: subdir/blueberry
-  Duplicate Mock path: /fruits2/__mocks__/subdir/blueberry.js
+  Duplicate Mock path: /project/fruits2/__mocks__/subdir/blueberry.js
 This warning is caused by two manual mock files with the same file name.
 Jest will use the mock file found in: 
-/fruits2/__mocks__/subdir/blueberry.js
+/project/fruits2/__mocks__/subdir/blueberry.js
  Please delete one of the following two files: 
- /fruits1/__mocks__/subdir/blueberry.js
-/fruits2/__mocks__/subdir/blueberry.js
+ /project/fruits1/__mocks__/subdir/blueberry.js
+/project/fruits2/__mocks__/subdir/blueberry.js
 
 "
 `;
 
 exports[`HasteMap warns on duplicate module ids 1`] = `
 "jest-haste-map: @providesModule naming collision:
   Duplicate module name: Strawberry
-  Paths: /fruits/raspberry.js collides with /fruits/strawberry.js
+  Paths: /project/fruits/raspberry.js collides with /project/fruits/strawberry.js
 
 This warning is caused by a @providesModule declaration with the same name across two different files."
 `;