[Haddock] [haddock] #172: Please add --interface-version flag to haddock

[haddock]

#172: Please add --interface-version flag to haddock
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Reporter:  nomeata      |       Owner:       
    Type:  enhancement  |      Status:  new  
Priority:  major        |   Milestone:  2.7.0
 Version:  2.9.2        |    Keywords:       
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 Hi,

 In Debian, we set up some package dependencies based on the interface
 version of haddock, to ensure that the installed haddock can read the
 haddock index files that come with the documentation packages.

 For that, haddock ought to expose this information, preferably via a
 command line flag. The attached patch, which we use in Debian, implements
 this.

 Thanks,
 Joachim

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Ticket URL: <http://trac.haskell.org/haddock/ticket/172>
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