version: 2
jobs:
  unit-tests:
    working_directory: ~/app
    docker:
      - image: circleci/node:latest
        environment:
          # lang settings required for Meteor's Mongo
          LANG: C.UTF-8
          LANGUAGE: C.UTF-8
          LC_ALL: C.UTF-8
          LC_NUMERIC: en_US.UTF-8
          METEOR_BIN_TMP_DIR: /home/circleci/build-temp/
          METEOR_BIN_TMP_FILE: meteor-bin-temp
    steps:
      - checkout
      - restore_cache:
          key: build-temp-{{ checksum ".meteor/release" }}-{{ checksum ".circleci/config.yml" }}
      - restore_cache:
          key: meteor-release-{{ checksum ".meteor/release" }}-{{ checksum ".meteor/versions" }}-{{ checksum ".circleci/config.yml" }}
      - restore_cache:
          key: meteor-packages
      - restore_cache:
          key: npm-packages-{{ checksum "package.json" }}-{{ checksum "package-lock.json" }}-{{ checksum ".circleci/config.yml" }}
      - run:
          name: restore cached meteor binary
          command: |
            if [ -e ~/build-temp/meteor-bin ]
            then
                echo "Cached Meteor bin found, restoring it."
                sudo cp ~/build-temp/meteor-bin /usr/local/bin/meteor
            else
                echo "No cached Meteor bin found."
            fi
      - run:
          name: install meteor
          command: |
            # only install meteor if bin isn't found
            command -v meteor >/dev/null 2>&1 || curl https://install.meteor.com | /bin/sh
      - run:
          name: check versions
          command: |
            echo "Meteor version:"
            # this forces Meteor to download whatever release your project is using
            meteor --version
            which meteor
            echo "Meteor node version:"
            meteor node -v
            echo "Meteor npm version:"
            meteor npm -v
      - run:
          name: copy meteor bin to build cache
          command: |
            mkdir -p ~/build-temp
            cp /usr/local/bin/meteor ~/build-temp/meteor-bin
      - save_cache:
          key: build-temp-{{ checksum ".meteor/release" }}-{{ checksum ".circleci/config.yml" }}
          paths:
            - ~/build-temp
      - run:
          name: install npm packages
          command: meteor npm i
      - save_cache:
          key: npm-packages-{{ checksum "package.json" }}-{{ checksum "package-lock.json" }}-{{ checksum ".circleci/config.yml" }}
          paths:
            - ./node_modules/
            - ~/.npm/
      - run:
          name: run tests
          command: meteor npm run test
      - save_cache:
          key: meteor-release-{{ checksum ".meteor/release" }}-{{ checksum ".meteor/versions" }}-{{ checksum ".circleci/config.yml" }}
          paths:
            - ~/.meteor
      - save_cache:
          key: meteor-packages-{{ epoch }}
          paths:
            - .meteor/local