A simple tool for cabal database query
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A misc set of tools to operate misc queries on the local cabal database and the associated packages

Command
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* diff: run the diff command between two different versions of a package.
* revdeps: print all reverse dependencies of a package.
* info: print all available versions of a package and some misc information.
* search-author: search all the database for match in the author field.
* search-maintainer: search all the database for match in the maintainer field.
* graph: generate a dot format graph of the dependency

Check the original blog post for more information:

* [Cabal-db announcement](http://tab.snarc.org/posts/haskell/2013-03-13-cabal-db.html)