[GHC] #13743: Colourise command output

[GHC]

#13743: Colourise command output
-------------------------------------+-------------------------------------
           Reporter:  Iceland_jack   |             Owner:  (none)
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:
          Component:  GHCi           |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 Our error messages are now colourful (#10073), can we do the same for the
 output of commands like `:info`?

 `:info` has gotten bloated (I also think the context / instance head
 should be swapped, but that's another story), adding colour would make it
 easier to read

 {{{#!html
 <pre>
 >>> :i Int
 data <span style="color: red;font-weight: bold">Int</span> = I# E.Int#
 -- Defined in ‘GHC.Types’</br>
 instance <span style="font-weight: bold">Eq</span> <span style="color: red
 ;font-weight: bold">Int</span> -- Defined in ‘GHC.Classes’
 instance <span style="font-weight: bold">Ord</span> <span style="color:
 red;font-weight: bold">Int</span> -- Defined in ‘GHC.Classes’
 instance <span style="font-weight: bold">Show</span> <span style="color:
 red;font-weight: bold">Int</span> -- Defined in ‘GHC.Show’
 instance <span style="font-weight: bold">Read</span> <span style="color:
 red;font-weight: bold">Int</span> -- Defined in ‘GHC.Read’
 instance <span style="font-weight: bold">Enum</span> <span style="color:
 red;font-weight: bold">Int</span> -- Defined in ‘GHC.Enum’
 instance <span style="font-weight: bold">Num</span> <span style="color:
 red;font-weight: bold">Int</span> -- Defined in ‘GHC.Num’
 instance <span style="font-weight: bold">Real</span> <span style="color:
 red;font-weight: bold">Int</span> -- Defined in ‘GHC.Real’
 instance [safe] <span style="font-weight: bold">NFData</span> <span
 style="color: red;font-weight: bold">Int</span> -- Defined in
 ‘Control.DeepSeq’
 instance <span style="font-weight: bold">Data</span> <span style="color:
 red;font-weight: bold">Int</span> -- Defined in ‘Data.Data’
 instance <span style="font-weight: bold">Bounded</span> <span
 style="color: red;font-weight: bold">Int</span> -- Defined in ‘GHC.Enum’
 instance <span style="font-weight: bold">O.Outputable</span> <span
 style="color: red;font-weight: bold">Int</span> -- Defined in ‘Outputable’
 instance [safe] <span style="font-weight: bold">PrintfArg</span> <span
 style="color: red;font-weight: bold">Int</span> -- Defined in
 ‘Text.Printf’
 instance <span style="font-weight: bold">Integral</span> <span
 style="color: red;font-weight: bold">Int</span> -- Defined in ‘GHC.Real’
 </pre>
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13743>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler