The eye that looks ahead to the safe course is closed forever.

Haskell project template.

Set up cabal within a nix shell. If you like nix this is a good way of doing haskell development.

similar to: https://github.com/monadfix/nix-cabal except this has a makefile and ghcid. We also make aggressive use of pinning ensuring project builds for ever (theoretically).

Comes with:

• GHCID
• a nix shell, meaning somewhat platform independence.
  • which is pinned by default
• A couple of handy make commands.
• Starting haskell files, assuming we put practically all code in library
• Working test suite.
• functioining CI (pick your favorite or keep both)
  • for various platforms with cabal
  • a nix flake.

Usage

Modifying for your project

Assuming the name of your new project is new-project.

git clone git@github.com:jappeace/haskell-template-project.git new-project
cd new-project

• Edit template.cabal,
  • find and replace template with new-project
  • Update copyright
  • Update github
• rename template.cabal to new-project.cabal
• Edit Changelog.md
  • replace template with new-project
  • Also describe your version 1.0.0 release.
• Edit flake.nix, replace template with new-project.
• Edit copyright in LICENSE
• For automatic bound bumping: In “Settings” → “Actions” → “General” → “Workflow permissions” tick “Allow GitHub Actions to create and approve pull requests”

Reconfigure remotes

git remote add template git@github.com:jappeace/haskell-template-project.git
git remote set-url origin git@github.com:YOUR-ORG-OR-USER-NAME/new-project.git

We can get template updates like this if we want to by doing git pull template. There will be a large amount of conflicts, but the merge commit should solve them permanently.

Readme

• Select desired badges.
  • Point build badges to right project
• Give short project description.
• Add new quote suited for the project. For example for fakedata-quickcheck I used Kant because he dealt with the question "what is truth" a lot.
• Truncate this checklist
• Truncate motivation for using this template

Tools

Enter the nix shell.

nix develop

You can checkout the makefile to see what's available:

cat makefile

Running

make run

Fast filewatch which runs tests

make ghcid