patch applied (cabal-branches/cabal-1.4): Add PackageIndex.dependencyCycles

Sun May 4 06:16:26 PDT 2008 Duncan Coutts * Add PackageIndex.dependencyCycles Finds any cycles (strongly connected components) in the dependencies of set of packages. This is useful for checking the correctness of installation plans. M ./Distribution/Simple/PackageIndex.hs +18 View patch online: http://darcs.haskell.org/cabal-branches/cabal-1.4/_darcs/patches/20080504131...