nix-playgraound/25-haskell-state/README.md

25-haskell-state

This example shows intermediate Haskell planning with State.

It includes:

• a planner state that tracks build numbers and rollout waves,
• stateful allocation of per-environment wave numbers,
• a CLI that renders a deployment plan from compact request strings, and
• a test suite run by nix flake check.

Useful commands:

nix develop
cabal run
cabal run -- api:production:3 worker:staging:1 cache:production:2
cabal test

nix build
./result/bin/mini-state-planner api:production:3 worker:staging:1 cache:production:2

nix run . -- api:production:3 worker:staging:1 cache:production:2
nix flake check