I am learning to use cabal for my code.
Just when I start, I met a question, is there an easy way to find
out what packages my code depends?
If you've managed to get your code to compile,
ghc --show-iface Main.hi
is perhaps the easiest way (ghc --make and ghci will also report
package dependencies as they encounter them).
If you're looking for the package for a particular module, ghc-pkg
can help
ghc-pkg find-module Control.Concurrent
c:/ghc/ghc-6.10.3\package.conf:
base-3.0.3.1, base-4.1.0.0
ghc-pkg find-module Data.Map
c:/ghc/ghc-6.10.3\package.conf:
containers-0.2.0.1
If you're looking for a minimal set of imports before hunting for
packages, ghc's -ddump-minimal-imports will create a file Main.imports
with that information. You could then run ghc-pkg find-module over
that list.
These are not the only options. Perhaps the available tools
need to be advertized more?-)
Claus
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