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ci-nix github action (#18)
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* Fixes #9, missing build with nix in CI

* Once the project grows, we should select better, or a default, build
  targets
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choener authored Dec 19, 2024
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53 changes: 53 additions & 0 deletions .github/workflows/ci-nix.yaml
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# https://github.com/marketplace/actions/install-nix

name: "ci-nix"
on:
pull_request:
push:

concurrency:
group: ${{ github.ref }}
cancel-in-progress: true

jobs:
tests:
runs-on: ubuntu-latest
steps:

- uses: actions/checkout@v4

- name: Install nix
uses: cachix/install-nix-action@v27

# https://github.com/marketplace/actions/cache-nix-store
- name: Restore and cache Nix store
uses: nix-community/cache-nix-action@v5
with:
# restore and save a cache using this key
# TODO: Also hash the cabal.config and *cabal files, since we depend on them
primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.nix') }}
# if there's no cache hit, restore a cache by this prefix
restore-prefixes-first-match: nix-${{ runner.os }}-
# collect garbage until Nix store size (in bytes) is at most this number
# before trying to save a new cache
gc-max-store-size-linux: 1073741824
# do purge caches
purge: true
# purge all versions of the cache
purge-prefixes: cache-${{ runner.os }}-
# created more than this number of seconds ago relative to the start of the `Post Restore` phase
purge-created: 0
# except the version with the `primary-key`, if it exists
purge-primary-key: never

# # Possibly need to cache cabal.
# - name: Cache .cabal
# uses: actions/cache@v3
# with:
# path: ${{ steps.cabal-setup.outputs.cabal-store }}
# key: cabal-${{ hashFiles('cabal.project') }}

# We currently do not have a default target
- run: nix build --accept-flake-config .#wst-poc
- run: nix flake --accept-flake-config check

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