Cabal is the Haskell package and build tool.
The following are a few of the “getting started” commands.
What version do you have of Cabal?
Run the following
cabal --version
Check for updates to Cabal
You can check
cabal new-install Cabal cabal-install
Check for package updates
This command will pull the latest package list from hackage.haskell.org
cabal update
Creating a new project
We can create a new Haskell project using
cabal init
This will create a Main.hs, Setup.hs and a .cabal file for your configurations. We can then edit the .cabal file or we can run the interactive version and supply details using
cabal init -i
Building our project
We can build our project by simply using
cabal build
Running our project
To run (or build and run)
cabal run
Cleaning our project
cabal clean
Running the ghci repl
You can run ghci by simply typing
ghci
Or you can run the ghci that’s available via cabal using
cabal repl
Adding a library
We can download and install package from The Haskell Package Repository using the command
cabal install --lib QuickCheck HUnit
This installs the packages QuickCheck and HUnit from the package repository. The –lib is used for packages which do not contain an executable (i.e. a library package). We can also install .gz packages by specifying a file location or URL.
Packages are then stored on Windows in
%USERPROFILE%\AppData\Roaming\cabal\store\ghc-8.10.1
References