[tahoe-lafs-trac-stream] [tahoe-lafs] #1488: CLI: 'bin/tahoe @foo ...' gives misleading error message if foo doesn't exist

[tahoe-lafs]

#1488: CLI: 'bin/tahoe @foo ...' gives misleading error message if foo doesn't
exist
-------------------------------+----------------------------
 Reporter:  davidsarah         |          Owner:  davidsarah
     Type:  defect             |         Status:  new
 Priority:  major              |      Milestone:  soon
Component:  code-frontend-cli  |        Version:  1.8.2
 Keywords:  error cli          |  Launchpad Bug:
-------------------------------+----------------------------
 {{{
 $ bin/tahoe @coverage run --branch @tahoe debug trial
 }}}
 gives this error:
 {{{
 I am a "bin/tahoe" executable who is only for the convenience of running
 Tahoe from its source distribution -- I work only when invoked as the
 "tahoe"
 script that lives in the "bin" subdirectory of a Tahoe source code
 distribution, and only if you have already run "python setup.py build".

 I just tried to invoke my brother at
 "/home/davidsarah/tahoe/snotty/support/bin/tahoe"
 and got an exception.

 Traceback (most recent call last):
   File "bin/tahoe", line 116, in <module>
     res = subprocess.call(command, env=os.environ)
   File "/usr/lib/python2.6/subprocess.py", line 470, in call
     return Popen(*popenargs, **kwargs).wait()
   File "/usr/lib/python2.6/subprocess.py", line 623, in __init__
     errread, errwrite)
   File "/usr/lib/python2.6/subprocess.py", line 1141, in _execute_child
     raise child_exception
 OSError: [Errno 2] No such file or directory
 }}}

 The 'No such file or directory' error is correct, because no 'coverage'
 script was installed on this system. (The Ubuntu python-coverage package
 installs it as 'python-coverage' instead.) However the message before that
 complains about the wrong path, as though it were trying to invoke the
 {{{support/bin/tahoe}}} script rather than 'coverage'.

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1488>
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