action.yaml

name: "Setup Nix devshell"
description: "This action sets up a nix devshell environment"
runs:
  using: "composite"
  steps:
    - name: Setup Nix
      uses: nixbuild/nix-quick-install-action@5bb6a3b3abe66fd09bbf250dce8ada94f856a703 # v30

    - uses: nix-community/cache-nix-action@92aaf15ec4f2857ffed00023aecb6504bb4a5d3d # v6
      with:
        # restore and save a cache using this key
        primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.nix', '**/flake.lock') }}
        # if there's no cache hit, restore a cache by this prefix
        restore-prefixes-first-match: nix-${{ runner.os }}-
        # collect garbage until Nix store size (in bytes) is at most this number
        # before trying to save a new cache
        # 1 GB = 1073741824 B
        gc-max-store-size-linux: 1073741824
        # do purge caches
        purge: true
        # purge all versions of the cache
        purge-prefixes: nix-${{ 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

    - name: Enter devshell
      uses: nicknovitski/nix-develop@9be7cfb4b10451d3390a75dc18ad0465bed4932a # v1.2.1
      with:
        arguments: ".#ci"