URL: https://github.com/facebook/buck/tarball/2ff4f45a971776afcfbe88333d78c4ca6bf03df9
Version: 2ff4f45a971776afcfbe88333d78c4ca6bf03df9
License: Apache 2.0
License File: LICENSE

Description:
Buck: An Android (and Java!) build tool

This copy is stripped down to only include the files needed for Xcode project generation, specifically:
com/facebook/buck/apple/{FileTypes,xcode/{xcodeproj/**,GidGenerator,XcodeprojSerializer}}.java

Local Modifications:
Add FILE_REFERENCE(2) to the PBXContainerItemProxy.ProxyType enum.
Update LastUpgradeCheck from 600 to 610
Add logic to automatically detect XCVersionGroup type even if there is no currentVersion set
Removed code not used by Bazel.