macos - Have I upgraded my cabal-install?

Question

I just installed Haskell from it's official site. After that, following it's quick-start tutorial.

I run:

cabal update

Which shows this message:

Downloading the latest package list from hackage.haskell.org
Note: there is a new version of cabal-install available.
To upgrade, run: cabal install cabal-install

I run:

cabal install cabal-install

and check if the update was successful with

cabal update

The result, it shows me the same message from the start:

Downloading the latest package list from hackage.haskell.org
Note: there is a new version of cabal-install available.
To upgrade, run: cabal install cabal-install

So, did I upgrade the cabal-install or not? How do I check my cabal's version?

Important: I'm using the 64 bits version for Mac OS X.

Answer 1

In my case (and probably others?) cabal is initially installed in /usr/local/bin by homebrew when installing haskell-platform. When upgrading cabal, the version is installed to $HOME/.cabal/bin/cabal. You ought to place your cabal bins higher in your $PATH, like so:

export PATH=$HOME/.cabal/bin:$PATH