[GHC] #9259: GHCi should list its available command line options

[GHC]

#9259: GHCi should list its available command line options
-------------------------------------+-------------------------------------
              Reporter:  jstolarek   |            Owner:  kolmodin
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:
             Component:  Driver      |         Keywords:  newcomer
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D337   |
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Comment (by Austin Seipp <austin@…>):

 In [changeset:"624a7c5a2eee0c0ba486a45550680052c2c79849/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="624a7c5a2eee0c0ba486a45550680052c2c79849"
 ghc: allow --show-options and --interactive together

 Summary:
 Previously 'ghc --show-options' showed all options that GHC can possibly
 accept. With this patch, it'll only show the options that have effect in
 non-interactive modes.
 This change also adds support for using 'ghc --interactive --show-options'
 which previously was disallowed. This command will show all options that
 have
 effect in the interactive mode.
 The CmdLineParser is updated to know about the GHC modes, and then each
 flag
 is annotated with which mode it has effect.
 This fixes #9259.

 Test Plan:
 Try out --show-options with --interactive on the command line. With and
 without
 --interactive should give different results.
 Run the test suite, mode001 has been updated to verify this new flag
 combination.

 Reviewers: austin, jstolarek

 Reviewed By: austin, jstolarek

 Subscribers: jstolarek, thomie, carter, simonmar

 Differential Revision: https://phabricator.haskell.org/D337

 GHC Trac Issues: #9259
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9259#comment:9>
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