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Properly re-raise exception to save original tracebacks

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We usually mutate some exceptions to OfflineImapError() and it is
a whole lot better if such exception will show up with the original
traceback, so all valid occurrences of such mutations were transformed
to the 3-tuple form of "raise".  Had also added coding guidelines
document where this re-raise strategy is documented.

Signed-off-by: Eygene Ryabinkin <rea@codelabs.ru>
This commit is contained in:
Eygene Ryabinkin
2015-01-11 23:44:24 +03:00
parent 8c6abc413e
commit e7fabf9e57
15 changed files with 150 additions and 26 deletions
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9
offlineimap/folder/IMAP.py
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@@ -594,7 +594,9 @@ class IMAPFolder(BaseFolder):
"repository '%s' failed (abort). Server responded: %s\n"
"Message content was: %s"%
(msg_id, self, self.getrepository(), str(e), dbg_output),
OfflineImapError.ERROR.MESSAGE)
OfflineImapError.ERROR.MESSAGE), \
None, exc_info()[2]
# XXX: is this still needed?
self.ui.error(e, exc_info()[2])
except imapobj.error as e: # APPEND failed
# If the server responds with 'BAD', append()
@@ -604,8 +606,8 @@ class IMAPFolder(BaseFolder):
imapobj = None
raise OfflineImapError("Saving msg (%s) folder '%s', repo '%s'"
"failed (error). Server responded: %s\nMessage content was: "
"%s"% (msg_id, self, self.getrepository(), str(e), dbg_output),
OfflineImapError.ERROR.MESSAGE)
"%s" % (msg_id, self, self.getrepository(), str(e), dbg_output),
OfflineImapError.ERROR.MESSAGE), None, exc_info()[2]
# Checkpoint. Let it write out stuff, etc. Eg searches for
# just uploaded messages won't work if we don't do this.
(typ,dat) = imapobj.check()
@@ -676,6 +678,7 @@ class IMAPFolder(BaseFolder):
imapobj = self.imapserver.acquireconnection()
self.ui.error(e, exc_info()[2])
fails_left -= 1
# self.ui.error() will show the original traceback
if not fails_left:
raise e
if data == [None] or res_type != 'OK':