[tahoe-lafs-trac-stream] [tahoe-lafs] #1388: nicer reporting of unparseable version numbers in deps

[tahoe-lafs]

#1388: nicer reporting of unparseable version numbers in deps
-----------------------------------------------------------+----------------
 Reporter:  zooko                                          |           Owner:  nobody   
     Type:  defect                                         |          Status:  new      
 Priority:  minor                                          |       Milestone:  undecided
Component:  unknown                                        |         Version:  1.8.2    
 Keywords:  error usability packaging setuptools foolscap  |   Launchpad Bug:           
-----------------------------------------------------------+----------------
 As described in #1387, if one of the dependencies has a version number
 that is not considered "Rational" by {{{verlib}}}, Tahoe-LAFS emits
 {{{
   File "/Users/zooko/playground/tahoe-
 lafs/pristine/src/allmydata/__init__.py", line 375, in <module>
     check_all_requirements()
   File "/Users/zooko/playground/tahoe-
 lafs/pristine/src/allmydata/__init__.py", line 373, in
 check_all_requirements
     raise PackagingError(get_error_string(errors, debug=True))
 allmydata.PackagingError:
 TypeError: expected string or buffer
 }}}
 followed by a potentially large and messy-looking dump of the
 {{{PYTHONPATH}}}.

 It would be better if the error message said that the problem was that a
 version number couldn't be parsed, as well as specifying what the version
 number was that couldn't be parsed and where it came from.

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1388>
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