Fix a bug with over collapsing paths

This is issue:
#169

.gitignore

@@ -8,4 +8,4 @@ dist/
 tests/__pycache__/
 *.suo
 publish/
-adlsenv/
+adlsenv*/

HISTORY.rst

@@ -2,6 +2,10 @@
 
 Release History
 ===============
+0.0.14 (2017-07-10)
+-------------------
+* Fix an issue where common prefixes in paths for upload and download were collapsed into only unique paths.
+
 0.0.13 (2017-06-28)
 -------------------
 * Add support for automatic refreshing of service principal credentials

azure/datalake/store/__init__.py

@@ -6,7 +6,7 @@
 # license information.
 # --------------------------------------------------------------------------
 
-__version__ = "0.0.13"
+__version__ = "0.0.14"
 
 from .core import AzureDLFileSystem
 from .multithread import ADLDownloader

azure/datalake/store/multithread.py

@@ -25,7 +25,7 @@
 from .core import AzureDLPath, _fetch_range
 from .exceptions import FileExistsError
 from .transfer import ADLTransferClient
-from .utils import commonprefix, datadir, read_block, tokenize
+from .utils import datadir, read_block, tokenize
 
 logger = logging.getLogger(__name__)
 
@@ -190,8 +190,8 @@ def _setup(self):
         else:
             rfiles = self.client._adlfs.glob(self.rpath, details=True, invalidate_cache=True)
         if len(rfiles) > 1:
-            prefix = commonprefix([f['name'] for f in rfiles])
-            file_pairs = [(os.path.join(self.lpath, os.path.relpath(f['name'] +'.inprogress', prefix)), f)
+            local_rel_rpath = str(AzureDLPath(self.rpath).globless_prefix)
+            file_pairs = [(os.path.join(self.lpath, os.path.relpath(f['name'] +'.inprogress', local_rel_rpath)), f)
                           for f in rfiles]
         elif len(rfiles) == 1:
             if os.path.exists(self.lpath) and os.path.isdir(self.lpath):
@@ -442,8 +442,8 @@ def _setup(self):
             lfiles = glob.glob(self.lpath)
 
         if len(lfiles) > 1:
-            prefix = commonprefix(lfiles)
-            file_pairs = [(f, self.rpath / AzureDLPath(f).relative_to(prefix)) for f in lfiles]
+            local_rel_lpath = str(AzureDLPath(self.lpath).globless_prefix)
+            file_pairs = [(f, self.rpath / AzureDLPath(f).relative_to(local_rel_lpath)) for f in lfiles]
         elif lfiles:
             if self.client._adlfs.exists(self.rpath, invalidate_cache=True) and \
                self.client._adlfs.info(self.rpath, invalidate_cache=False)['type'] == "DIRECTORY":