stack.md

Building a project with Stack

This example shows how to build a project with stack. Our project in this example consists of Main and its dependency Fizzbuzz. The files containing the these modules are linked below.

1. Main.hs
2. Fizzbuzz.hs

Create a new stack project named fbtest:

~$ stack new fbtest

Move Main.hs into ./fbtest/app Move your other modules, in this case only Fizzbuzz.hs, into ./fbtest/src

Ensure that stack is using the correct version of GHC:

~$ stack setup

Next run:

~$ stack init
~$ stack build

To run the executable:

~$ stack exec fbtest-exe

The program then outputs:

sylvanix@galaxia:testing_stack$ stack exec fbtest-exe
1
2
Buzz
4
Fizz
Buzz
7
8
Buzz
Fizz
11
Buzz
13
14
FizzBuzz
16
17
Buzz
19
Fizz
Buzz
22
23

und so weiter

The actual path of the binary executable file fbtest-exe is:
fbtest/.stack-work/dist/x86_64-linux/Cabal-3.0.1.0/build/fbtest-exe

If you want to specify another GHC version from the default, say version 9.0.1, then run this at the command line before building:

~$ stack config set resolver ghc-9.0.1