[Haskell-cafe] Extracting exposed modules from an installed library

[Corentin Dupont]

Hi Joachim,
that's right thanks, but I was looking for a way to do that from a program.
ghc-pkg does not seems to expose any library...

On Wed, Mar 20, 2013 at 11:23 PM, Joachim Breitner <mail at joachim-breitner.de
> wrote:

> Hi,
>
> Am Mittwoch, den 20.03.2013, 00:34 +0100 schrieb Corentin Dupont:
> > Hi Cafe!
> > I'm looking for how to extract the exposed modules (as a list of
> > strings) from an installed library, giving the library name.
> > I can see some structures in Cabal (InstalledPackageInfo) and some
> > functions in ghc-pkg.hs in GHC, but nothing readily useable...
>
> $ ghc-pkg field base exposed-modules
> exposed-modules: Foreign.Concurrent GHC.Arr GHC.Base GHC.Char
>                  GHC.Conc GHC.Conc.IO GHC.Conc.Signal GHC.Conc.Sync
>                  GHC.ConsoleHandler GHC.Constants GHC.Desugar GHC.Enum
>                  GHC.Environment GHC.Err GHC.Exception GHC.Exts
> GHC.Fingerprint
>                  GHC.Fingerprint.Type GHC.Float GHC.Float.ConversionUtils
>                  GHC.Float.RealFracMethods GHC.Foreign GHC.ForeignPtr
> GHC.Generics
>                  GHC.GHCi GHC.Handle GHC.IO GHC.IO.Buffer
> GHC.IO.BufferedIO
>                  GHC.IO.Device GHC.IO.Encoding GHC.IO.Encoding.CodePage
>                  GHC.IO.Encoding.Failure GHC.IO.Encoding.Iconv
>                  GHC.IO.Encoding.Latin1 GHC.IO.Encoding.Types
> GHC.IO.Encoding.UTF16
>                  GHC.IO.Encoding.UTF32 GHC.IO.Encoding.UTF8
> GHC.IO.Exception
>                  GHC.IO.FD GHC.IO.Handle GHC.IO.Handle.FD
> GHC.IO.Handle.Internals
>                  GHC.IO.Handle.Text GHC.IO.Handle.Types GHC.IO.IOMode
> GHC.IOArray
>                  GHC.IOBase GHC.IORef GHC.IP GHC.Int GHC.List GHC.MVar
> GHC.Num
>                  GHC.PArr GHC.Pack GHC.Ptr GHC.Read GHC.Real GHC.STGHC.Stack
>                  GHC.Stats GHC.Show GHC.Stable GHC.Storable GHC.STRef
> GHC.TypeLits
>                  GHC.TopHandler GHC.Unicode GHC.Weak GHC.Word
> System.Timeout
>                  GHC.Event Control.Applicative Control.Arrow
> Control.Category
>                  Control.Concurrent Control.Concurrent.Chan
> Control.Concurrent.MVar
>                  Control.Concurrent.QSem Control.Concurrent.QSemN
>                  Control.Concurrent.SampleVar Control.Exception
>                  Control.Exception.Base Control.Monad Control.Monad.Fix
>                  Control.Monad.Instances Control.Monad.STControl.Monad.ST.Safe
>                  Control.Monad.ST.Unsafe Control.Monad.ST.Lazy
>                  Control.Monad.ST.Lazy.Safe Control.Monad.ST.Lazy.Unsafe
>                  Control.Monad.ST.Strict Control.Monad.Zip Data.Bits
> Data.Bool
>                  Data.Char Data.Complex Data.Dynamic Data.Either Data.Eq
> Data.Data
>                  Data.Fixed Data.Foldable Data.Function Data.Functor
> Data.HashTable
>                  Data.IORef Data.Int Data.Ix Data.List Data.Maybe
> Data.Monoid
>                  Data.Ord Data.Ratio Data.STRef Data.STRef.Lazy
> Data.STRef.Strict
>                  Data.String Data.Traversable Data.Tuple Data.Typeable
>                  Data.Typeable.Internal Data.Unique Data.Version Data.Word
>                  Debug.Trace Foreign Foreign.C Foreign.C.Error
> Foreign.C.String
>                  Foreign.C.Types Foreign.ForeignPtr Foreign.ForeignPtr.Safe
>                  Foreign.ForeignPtr.Unsafe Foreign.Marshal
> Foreign.Marshal.Alloc
>                  Foreign.Marshal.Array Foreign.Marshal.Error
> Foreign.Marshal.Pool
>                  Foreign.Marshal.Safe Foreign.Marshal.Utils
> Foreign.Marshal.Unsafe
>                  Foreign.Ptr Foreign.Safe Foreign.StablePtr
> Foreign.Storable Numeric
>                  Prelude System.Console.GetOpt System.CPUTime
> System.Environment
>                  System.Exit System.IO System.IO.Error System.IO.Unsafe
> System.Info
>                  System.Mem System.Mem.StableName System.Mem.Weak
>                  System.Posix.Internals System.Posix.Types
>                  Text.ParserCombinators.ReadP
> Text.ParserCombinators.ReadPrec
>                  Text.Printf Text.Read Text.Read.Lex Text.Show
> Text.Show.Functions
>                  Unsafe.Coerce
>
>
> Greetings,
> Joachim
>
> --
> Joachim "nomeata" Breitner
> Debian Developer
>   nomeata at debian.org | ICQ# 74513189 | GPG-Keyid: 4743206C
>   JID: nomeata at joachim-breitner.de | http://people.debian.org/~nomeata
>
>
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