Blog Generator

My follow along version of Learn Haskell.

Installing Dependencies

External dependencies:

• Nix package manager
  • With Flakes enabled
• Direnv

Note to self: can we somehow include direnv in flake and bootstrap it into vscode?

This project is defined with a Nix Flake. This flake takes care of downloading all the Haskell dependencies. It also provides a shell environment for development that have these dependencies available in the PATH.

Before the flake can be used, check your system and change the system variable in outputs to your system. Common values are:

• aarch64-darwin Apple Silicon MacOS
• x86_64-linux For most Linux distro's and Windows WSL

When in doubt, start the Nix repl (nix repl) and type: builtins.currentSystem.

This shell environment can be accessed in a few different ways:

• Through VS Code with the direnv extension (see .vscode/extensions.json)
• Through your normal shell with direnv
• Through your normal shell with nix develop (not recommended, as you won't have your normal shell config available there)

Running the app

Very hacky stuff right now.

cabal run # Spits the generated html to stdout

cabal run > artifact/hello.html # Now we have the html (and sometimes some build output) in a file. 
open artifact/hello.html # That we can open in our browser.

cabal is available inside the devShell. In VS Code with direnv, you can just run it in the VS Code Terminal.