haskell-6

haskell-6 created by GitHub Classroom In this haskel project, we are creating a game called othello. It can be played either single player or multi player.

In order to run this game or haskel project, follow the following steps:

1. Open the terminal using Ctrl + Alt + T

2. Enter the directory where you would like to copy the repository. This can be anywhere in your local file system, like your home directory. For example: cd ~/

3. Navigate to the repository’s Code tab.

4. Click Clone or download.

5. Copy the URL provided.

6. Clone the repository by replacing with clone URL you copied in the previous step. The repository will be cloned into a new directory in this location.

        git clone <URL>
   

Our game is having a few dependencies. First and foremost, we use a library called gloss for drawing all of our graphics. We could use cabal to install gloss globally, so that all Haskell code on the computer could use it. However, with this approach we may eventually run into problems: if I have two packages, A (which depends on gloss-1.0) and B (which requires gloss-1.2), having a single global version of gloss won’t work, because we cannot have both A’s and B’s requirements satisfied simultaneously.

Instead of installing gloss globally, we’re going to create a sandbox. A sandbox is a directory in which cabal will (for the most part) ignore the global packages, and will instead install packages directly to that directory.

8. Navigate into the directory of the repository you just created and open the terminal in this directory.

9. Turn this directory into a sandbox using command:

        cabal sandbox init
   

10. Now that we have a sandbox to play in, let’s create our first package. This command will turn the directory into a Haskell package directory (as well as a sandbox):

        cabal init
    

11. We have to install the gloss library into the sandbox. Use the following command to install it :

          cabal install gloss==1.12.*
    

    In this command, we install gloss version 1.12.*

12. Next, once gloss is installed, we have to tell cabal that our package is allowed to use it. Find the line in haskell.cabal that mentions build-depends and change it to the following:

      build-depends:       base >=4.8 && <4.9, array >=0.5 && <0.6, gloss==1.12.* 
    

13. Now type the command :

        cabal run
    

    You will see the game running on your screen.