move DownloadStopped from download.common to interfaces

src/allmydata/immutable/downloader/common.py

@@ -8,6 +8,3 @@ class WrongSegmentError(Exception):
     pass
 class BadCiphertextHashError(Exception):
     pass
-
-class DownloadStopped(Exception):
-    pass

src/allmydata/immutable/downloader/segmentation.py

@@ -7,8 +7,9 @@ from twisted.internet.interfaces import IPushProducer
 from foolscap.api import eventually
 from allmydata.util import log
 from allmydata.util.spans import overlap
+from allmydata.interfaces import DownloadStopped
 
-from common import BadSegmentNumberError, WrongSegmentError, DownloadStopped
+from common import BadSegmentNumberError, WrongSegmentError
 
 class Segmentation:
     """I am responsible for a single offset+size read of the file. I handle

src/allmydata/interfaces.py

@@ -1055,6 +1055,9 @@ class NotEnoughSharesError(Exception):
 class NoSharesError(Exception):
     """Download was unable to get any shares at all."""
 
+class DownloadStopped(Exception):
+    pass
+
 class UploadUnhappinessError(Exception):
     """Upload was unable to satisfy 'servers_of_happiness'"""
 

src/allmydata/test/test_download.py

@@ -13,9 +13,10 @@ from allmydata.util.consumer import download_to_data, MemoryConsumer
 from allmydata.immutable import upload, layout
 from allmydata.test.no_network import GridTestMixin, NoNetworkServer
 from allmydata.test.common import ShouldFailMixin
-from allmydata.interfaces import NotEnoughSharesError, NoSharesError
+from allmydata.interfaces import NotEnoughSharesError, NoSharesError, \
+     DownloadStopped
 from allmydata.immutable.downloader.common import BadSegmentNumberError, \
-     BadCiphertextHashError, DownloadStopped, COMPLETE, OVERDUE, DEAD
+     BadCiphertextHashError, COMPLETE, OVERDUE, DEAD
 from allmydata.immutable.downloader.status import DownloadStatus
 from allmydata.immutable.downloader.fetcher import SegmentFetcher
 from allmydata.codec import CRSDecoder