[tahoe-lafs-trac-stream] [Tahoe-LAFS] #4107: UI/representation of errors (tracebacks) in the CLI client

[Tahoe-LAFS]

#4107: UI/representation of errors (tracebacks) in the CLI client
---------------------------+---------------------------
 Reporter:  hacklschorsch  |          Owner:
     Type:  enhancement    |         Status:  new
 Priority:  normal         |      Milestone:  undecided
Component:  unknown        |        Version:  n/a
 Keywords:                 |  Launchpad Bug:
---------------------------+---------------------------
 Similar to #4106, when I try to create a directory with a client that
 isn't connected to enough servers, instead of an understandable error
 message I get a misformatted stack trace (no line breaks):

 `tahoe create-alias --node-url='http://127.0.0.1:3457' tahoe`
 {{{
 "Error during HTTP request: 500 Internal Server Error
 b'Traceback (most recent call last):\\n  File \"/home/flo/Repositories
 /tahoe-lafs/venv3/lib/python3.11/site-
 packages/twisted/internet/defer.py\", line 1960, in
 _gotResultInlineCallbacks\\n    _inlineCallbacks(r, gen, status,
 context)\\n  File \"/home/flo/Repositories/tahoe-lafs/venv3/lib/python3.11
 /site-packages/twisted/internet/defer.py\", line 2112, in
 _inlineCallbacks\\n    status.deferred.callback(callbackValue)\\n  File
 \"/home/flo/Repositories/tahoe-lafs/venv3/lib/python3.11/site-
 packages/twisted/internet/defer.py\", line 873, in callback\\n
 self._startRunCallbacks(result)\\n  File \"/home/flo/Repositories/tahoe-
 lafs/venv3/lib/python3.11/site-packages/twisted/internet/defer.py\", line
 980, in _startRunCallbacks\\n    self._runCallbacks()\\n--- <exception
 caught here> ---\\n  File \"/home/flo/Repositories/tahoe-
 lafs/venv3/lib/python3.11/site-packages/twisted/internet/defer.py\", line
 1074, in _runCallbacks\\n    current.result = callback(  # type:
 ignore[misc]\\n  File \"/home/flo/Repositories/tahoe-
 lafs/venv3/lib/python3.11/site-packages/allmydata/mutable/filenode.py\",
 line 152, in create_with_keys\\n    return self._upload(initial_contents,
 None)\\n  File \"/home/flo/Repositories/tahoe-lafs/venv3/lib/python3.11
 /site-packages/allmydata/mutable/filenode.py\", line 685, in _upload\\n
 d = p.publish(new_contents)\\n  File \"/home/flo/Repositories/tahoe-
 lafs/venv3/lib/python3.11/site-packages/allmydata/mutable/publish.py\",
 line 474, in publish\\n    self.update_goal()\\n  File
 \"/home/flo/Repositories/tahoe-lafs/venv3/lib/python3.11/site-
 packages/allmydata/mutable/publish.py\", line 996, in update_goal\\n
 raise NotEnoughServersError(\"Ran out of non-bad servers,
 \"\\nallmydata.mutable.common.NotEnoughServersError: (\\'Ran out of non-
 bad servers, first_error=None\\', None)\\n'"
 }}}

 While I would prefer a human-readable error message instead of a stack
 trace for common problems, I'd be content (and accept as solution) a
 change that breaks lines on the stack trace.

--
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/4107>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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