version: 2

jobs:
  build-nix:

    machine:
        enabled: true

    steps:

      - run:
          name: Prepare nix directories
          command: |
            sudo mkdir -p /nix
            sudo chown circleci /nix

            sudo mkdir -p /etc/nix

            # Enable sandbox
            echo "sandbox = true" | sudo tee -a /etc/nix/nix.conf

            # Keep derivations and their outputs for better caching
            echo "keep-outputs = true" | sudo tee -a /etc/nix/nix.conf
            echo "keep-derivations = true" | sudo tee -a /etc/nix/nix.conf

            # Set a new TMP because /run/user is (1) pretty small and (2)
            # mounted with noexec
            new_tmp=$HOME/tmp
            mkdir -p $new_tmp
            echo "export TMPDIR=$new_tmp" >> $BASH_ENV

      - run:
          name: Install Nix
          command: |
            until bash <(curl https://nixos.org/nix/install)
            do
              echo "Nix install failed, retrying"
              sudo rm -rf /nix
              sudo mkdir -p /nix
              sudo chown circleci /nix
            done
            echo '. /home/circleci/.nix-profile/etc/profile.d/nix.sh' >> $BASH_ENV

      - checkout

      - run:
          name: Nix build
          command: ./script/test

      - run:
          name: "Update Node.js and npm (master only)"
          command: |
            if [ "$CIRCLE_BRANCH" == "master" ]; then
                nix-env -f ./nix -iA nodejs-10_x
            fi
      - run:
          name: "Install netlify-cli (master only)"
          command: |
            if [ "$CIRCLE_BRANCH" == "master" ]; then
                npm install netlify-cli
            fi

      - run:
          name: "Netlify deploy (master only)"
          command: |
            if [ "$CIRCLE_BRANCH" == "master" ]; then
                echo "Deploying to production"
                ./node_modules/netlify-cli/bin/run deploy \
                    --dir=./site \
                    --message="$CIRCLE_SHA1" --prod
            else
                echo "Not deploying"
            fi

workflows:
  version: 2
  build:
    jobs:
        - build-nix:
            context: niv-netlify