pkg_resources: better error message on bad spec

Include the text of the offending distribution spec when it is ill-formed.

I got an error message from pkg_resources.py saying that a distribution spec
was ill-formed, because it ended with an '=' and nothing came after the '='.
However, the error message and stack trace didn't tell which distribution spec
it was.

With this patch, it includes the distribution spec itself in the error message.

There is no unit test of this patch, but I did test it manually by inserting a
"raise ValueError('WHATEVER')" into the code and re-running it and observing
that the new output correctly included the distribution
remove unnecessary request from upload-helper

The unnecessary request was from the upload helper to the sender, and it was
there in order to trigger the sender to deliver cleartext hashes. But we've
long since removed cleartext hashes.

Unit tests pass both before and after this change, and code-coverage shows that
the block I changed is exercised in unit tests.
tests: add more diagnostics when code-under-test fails

This prints out which things are different when two sets are expected to be the
same. This was useful to me when debugging the code under test. Hm, this
pattern might be more generally useful...
test/common_util.py: fix a bug in NonASCIIPathMixin that would cause spurious log entries on Windows.

Signed-off-by: David-Sarah Hopwood <david-sarah@jacaranda.org>
docs/logging.rst: remove note about a bug that was fixed in foolscap 0.6.0.

Signed-off-by: David-Sarah Hopwood <davidsarah@mint>
docs/logging.rst: fix rst2html warnings.

Signed-off-by: David-Sarah Hopwood <davidsarah@mint>
Remove ResponseCache in favor of MDMFSlotReadProxy's cache. closes #1240.

This contains several merged patches. Individual messages follow, latest first:

* Fix a warning from check-miscaptures.
* In retrieve.py, explicitly test whether a key is in self.servermap.proxies
  rather than catching KeyError.
* Added a new comment to the MDMF version of the test I removed, explaining
  the removal of the SDMF version.
* Removed test_corrupt_all_block_hash_tree_late, since the entire block_hash_tree
  is cached in the servermap for an SDMF file.
* Fixed several tests that require files larger than the servermap cache.
* Remove unused test_response_cache_memory_leak().
* Exercise the cache.
* Test infrastructure for counting cache misses on MDMF files.
* Removed the ResponseCache. Instead, the MDMFSlotReadProxy initialized
  by ServerMap is kept around so Retrieve can access it. The ReadProxy
  has a cache of the first 1000 bytes initially read from each share by
  the ServerMap. We're able to satisfy a number of requests out of this
  cache, so roundtrips are reduced from 84 to 60 in test_deepcheck_mdmf.
  There is still some mystery about under what conditions the cache has
  fewer than 1000 bytes. Also this breaks some existing unit tests that
  depend on the inner behavior of ResponseCache.
* The servermap.proxies (a cache of SlotReadProxies) is now keyed
  by (verinfo,serverid,shnum) rather than just (serverid,shnum)
* Minor cosmetic changes
* Added a test failure if the number of cache misses is too high.

Author: Andrew Miller <amiller@dappervision.com>
Signed-off-by: David-Sarah Hopwood <davidsarah@jacaranda.org>
Allow welcome and storage status pages to display a non-ASCII node nickname. fixes #1298

Signed-off-by: David-Sarah Hopwood <davidsarah@jacaranda.org>
Make the system test nodes have non-ASCII nicknames.
This ensures that non-ASCII nicknames are exercised with the real server code.
refs #1298

Signed-off-by: David-Sarah Hopwood <davidsarah@mint>
Allow T (terabytes), P (petabytes), and E (exabytes), case-insensitive, in parse_abbreviated_size.
This also simplifies how case-insensitivity is handled, and fixes a corner case
where the wrong exception was raised when the size ends in "BB".
fixes #1812

Signed-off-by: David-Sarah Hopwood <davidsarah@mint>
Make abbreviate_space able to output in exabytes. refs #1812

Signed-off-by: David-Sarah Hopwood <davidsarah@mint>
docs/configuration.rst: clarification on scale suffixes for reserved_space.
refs #1812

Signed-off-by: David-Sarah Hopwood <davidsarah@mint>
If a helper is not configured, make the banner on the welcome page say that, and have a white background.
fixes #1735

Author: kick
Signed-off-by: David-Sarah Hopwood <davidsarah@jacaranda.org>
test_web.py: minor cleanup to test_helper_status.

Signed-off-by: David-Sarah Hopwood <david-sarah@jacaranda.org>
Make WUI headings and titles more consistent and accurate:
'Recent and Active Operations' and 'Operational Statistics'. fixes #1457

Signed-off-by: David-Sarah Hopwood <davidsarah@jacaranda.org>
Merge branch 'master', remote-tracking branch 'origin'
tahoe_check.py: tolerate missing fields in check results for LIT files/dirs. fixes #1758
Also test this case and improve some existing tests of 'tahoe check'.

Signed-off-by: David-Sarah Hopwood <david-sarah@jacaranda.org>
unit test for #1679
do not cache and re-use imm filenodes in nodemaker

fixes #1679
Add comment explaining fix to #1679. refs #1679

Signed-off-by: David-Sarah Hopwood <david-sarah@jacaranda.org>