hurry

🚨 This software is not yet usable. 🚨

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Hurry is a build tool for Haskell applications that's fast and easy to use. It integrates with the cabal tool and provides additional functionality for common developer tasks and build caching needs.

Use cases

Dockerfile layer caching

Using only cabal, Dockerfile layer caching is very difficult. While you could run cabal build --dependencies-only, doing so requires COPYing your PROJECT_NAME.cabal file. Unfortunately, Cabal files can change for many reasons (e.g. adding new modules), so the Dockerfile layer cache will often be needlessly invalidated.

# This will be invalidated whenever Cabal file changes (e.g. new modules)
COPY hurry.cabal
RUN cabal build --dependencies-only
COPY .
RUN cabal build

With Hurry, you can simply COPY your hurry.lock and then run hurry restore to load compiled dependencies from cache. This layer will never be invalidated unless your actual dependencies have changed, and you can check whether they've changed using hurry verify.

# This only invalidates if dependencies change
COPY hurry.lock
RUN hurry restore
COPY .
RUN cabal build
RUN hurry save

Installation

git clone https://github.com/elldritch/hurry
cd hurry
cabal install