BIND 10 #2583: save lettuce run output even if successful

[BIND 10 Development]

#2583: save lettuce run output even if successful
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                   Reporter:  jreed  |                 Owner:  UnAssigned
                       Type:  task   |                Status:  new
                   Priority:         |             Milestone:  New Tasks
  medium                             |              Keywords:
                  Component:  build  |             Sensitive:  0
  system                             |           Sub-Project:  Core
               CVSS Scoring:         |  Estimated Difficulty:  0
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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 Add an option to not remove the output from the lettuce runs by default.

 I brought this up in February 2012 on jabber:

 (48:15 AM) jreed: Can we have an option to not delete?

 (48:28 AM) jreed: It may be useful to research.

 (48:32 AM) jreed: for other things too.

 (50:05 AM) jelte: ack

 (50:31 AM) jreed: not sure if is minor. I can make a ticket for a
 reminder.

 (10:51:24 AM) jelte: right now there is no real easy support for it, but i
 think if you change src/tests/lettuce/features/terrain.py:80   to
 self.remove_files_on_exit = False  they'll be kept

 (51:42 AM) jelte: we can consider some way to communicate that as an
 option

 (52:03 AM) jelte: shouldn't be too hard if we don't mind env vars :)

 (10:52:28 AM) jelte: don't know, maybe lettuce itself has some support for
 it too

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Ticket URL: <http://bind10.isc.org/ticket/2583>
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