[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2230: 'tahoe --version[and-path]' should print versions even if a requirement check fails

[Tahoe-LAFS]

#2230: 'tahoe --version[and-path]' should print versions even if a requirement
check fails
---------------------------+-------------------------------------
     Reporter:  daira      |      Owner:
         Type:  defect     |     Status:  new
     Priority:  normal     |  Milestone:  undecided
    Component:  packaging  |    Version:  1.10.0
   Resolution:             |   Keywords:  packaging version error
Launchpad Bug:             |
---------------------------+-------------------------------------
Description changed by daira:

Old description:

> If the checks on dependencies done by `check_all_requirements` in
> [source:src/allmdyata/__init__py] fail, but we were trying to run `tahoe
> --version` or `tahoe --version-and-path`, then it would be useful to
> print the versions (and paths) anyway.
>
> Alternatively we could always print the versions and paths whenever the
> requirements check fails, regardless of what command we were trying to
> run.

New description:

 If the checks on dependencies done by `check_all_requirements` in
 [source:src/allmydata/__init__py] fail, but we were trying to run `tahoe
 --version` or `tahoe --version-and-path`, then it would be useful to print
 the versions (and paths) anyway.

 An acceptable way to implement this would be to always print the versions
 and paths whenever the requirements check fails, regardless of what
 command we were trying to run.

--

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2230#comment:1>
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