mars-rover

Mars Rover is a solution to exercise "mars rover". It provides some interesting features:

Input data in CLI is validated (planet boundaries, coordinates, commands). You can't break it.
Wrong commands are ignored. F.ex: "MKRLX" is converted to "MRL". So you can use any command format ("M,R,L", "M R L"...)
Interactive CLI: It asks you for new input if previous one is wrong.
Avoids navigation outside the planet; rover can't move outside grid boundaries.
Exposes algebraic data types and library core functions to allow reuse in different contexts (or projects). F.ex it could be used without grid boundaries if needed.

Dependencies

In order to compile the project, you will need pcre C library. You can install it using homebrew or apt:

apt-get install pcre #for Linux
brew install pcre #for Mac

Use Stack to install and run the project:

$ stack setup
$ stack build

stack setup command installs an isolated environment and stack build resolves dependencies and compiles the project.

You can use Stack to execute the generated binary:

$ stack exec mars-rover

You can execute the binary directly:

$ ./.stack-work/install/x86_64-osx/lts-11.10/8.2.2/bin/mars-rover

To interact directly to Library (avoiding CLI wrapper) you can use GHC REPL:

$ stack ghci --no-load
Prelude> :l src/MarsRover

To run the test suite:

$ stack test

To more information about CLI usage, please read 'mars rover exercise description'