Bruno Cardoso Lopes b7abde0343 Reapply [VFS] Skip non existent files from the VFS tree ... Reapply r278457 with test fixed to not abouse fs case sensitivity. When the VFS uses a YAML file, the real file path for a virtual file is described in the "external-contents" field. Example: ... { 'type': 'file', 'name': 'a.h', 'external-contents': '/a/b/c/a.h' } Currently, when parsing umbrella directories, we use vfs::recursive_directory_iterator to gather the header files to generate the equivalent modules for. If the external contents for a header does not exist, we currently are unable to build a module, since the VFS vfs::recursive_directory_iterator will fail when it finds an entry without a reliable real path. Since the YAML file could be prepared ahead of time and shared among different compiler invocations, an entry might not yet have a reliable path in 'external-contents', breaking the iteration. Give the VFS the capability to skip such entries whenever 'ignore-non-existent-contents' property is set in the YAML file. rdar://problem/27531549 llvm-svn: 278543		2016-08-12 18:18:24 +00:00
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Headers	Reapply [VFS] Skip non existent files from the VFS tree	2016-08-12 18:18:24 +00:00
Modules	Reapply [VFS] Skip non existent files from the VFS tree	2016-08-12 18:18:24 +00:00