Use absolute paths from repo root

Summary: Rather than using relative paths from the build root, this switches all paths to absolute paths from the build root. This makes integration with a lot of tooling easier.

Reviewed By: jeanlauliac

Differential Revision: D4285474

fbshipit-source-id: 80d20e0f6dc61a310e72112b9654628bff81a4f0

packager/react-packager/src/ModuleGraph/node-haste/node-haste.flow.js

@@ -56,7 +56,6 @@ export type FastFS = {
 };
 
 type HasteMapOptions = {|
-  allowRelativePaths: boolean,
   extensions: Extensions,
   files: Array<string>,
   helpers: DependencyGraphHelpers,

packager/react-packager/src/ModuleGraph/node-haste/node-haste.js

@@ -61,7 +61,6 @@ exports.createResolveFn = function(options: ResolveOptions): ResolveFn {
     getTransformedFile,
   );
   const hasteMap = new HasteMap({
-    allowRelativePaths: true,
     extensions: ['js', 'json'],
     files,
     helpers,

packager/react-packager/src/node-haste/DependencyGraph/HasteMap.js

@@ -20,7 +20,6 @@ const PACKAGE_JSON = path.sep + 'package.json';
 
 class HasteMap extends EventEmitter {
   constructor({
-    allowRelativePaths,
     extensions,
     files,
     moduleCache,
@@ -29,7 +28,6 @@ class HasteMap extends EventEmitter {
     platforms,
   }) {
     super();
-    this._allowRelativePaths = allowRelativePaths;
     this._extensions = extensions;
     this._files = files;
     this._helpers = helpers;
@@ -128,9 +126,6 @@ class HasteMap extends EventEmitter {
   }
 
   _processHastePackage(file, previousName) {
-    if (!this._allowRelativePaths) {
-      file = path.resolve(file);
-    }
     const p = this._moduleCache.getPackage(file);
     return p.isHaste()
       .then(isHaste => isHaste && p.getName()