dgisolfi/haskell_dev repository overview

⁠Haskell Development Environment

This Directory serves as the source code for a Docker image which is hosted on Docker Hub⁠ and can be pulled, run and used as a development environment for Haskell. The base image has the Glasgow Haskell Compiler installed, this allows a user to develop programs in an independent environment which avoids complicated downloads and installations on other operating systems. In addition, this keeps your devices hard drive free of compilers that may not be used after the Theory of Programming Languages class is complete.

⁠Docker Deployment

Note: If you need assistance with installing Docker, a quick guide can be found here⁠

To run an instance of the haskell_dev container on your own machine first pull the image by running the following in a terminal:

docker pull dgisolfi/haskell_dev

Next to run an instance of the image as a container run the following:

docker run -it dgisolfi/haskell_dev bash

Note: If you would like to mount a directory in order to develop your own code, run the following command instead and replace "/Path/to/Haskell/files" with the path to your files

docker run -it -v/Path/to/Haskell/files:/DEV/HaskellFiles dgisolfi/haskell_dev bash 

The result should be command line access as the root user to the now running Docker container. You should be located in the DEV directory within the container. If you chose to Volume mount any files first run ls which will list all directories and files, then cd into the directory "HaskellFiles", anything changed within the mounted directory will be reflected accross both host and container. Due to how volumes work in Docker you have the advantage of the files being shared between the container and your host machine, meaning you may now open the directory up in an IDE and begin to program, any changes in the directory on your host will be reflected in the container.

⁠Compiling

As an example program, there is an included file "helloworld.hs" located in the "DEV" directory, use this to test the compiler. To compile the file run the following:

ghc -o helloworld helloworld.hs

This will create an executable with the name of the program, in this case, "helloworld" in the directory. Run ./helloworld to execute the program.

To run your own programs alter the command to use the following format:

ghc -o program_name file_name.hs

Note: data inside a Docker container is nonpersistent. Only files that exist inside a volume mounted directory will remain after the container is exited

With your programs written and mounted you may now use the compiler to test and run them.