# Javascript Node CircleCI 2.0 configuration file
#
# Check https://circleci.com/docs/2.0/language-javascript/ for more details
#
version: 2
jobs:
  build:
    docker:
      - image: circleci/openjdk:8-jdk-browsers
        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

    working_directory: ~/app

    steps:
      # chackout the code from github
      - checkout
      # if certain cached files (packages, etc) are presetn, don't redownload them, restore the cached version
      - restore_cache:
          key: build-temp-{{ checksum ".meteor/release" }}-{{ checksum ".circleci/config.yml" }}
      - restore_cache:
          key: meteor-release-{{ checksum ".meteor/release" }}-{{ checksum ".circleci/config.yml" }}
      - restore_cache:
          key: meteor-packages-{{ checksum ".meteor/versions" }}-{{ checksum ".circleci/config.yml" }}
      - restore_cache:
          key: npm-packages-{{ checksum "package.json" }}-{{ checksum ".circleci/config.yml" }}
      - run:
          name: install build essentials
          command: sudo apt-get install -y build-essential
      - run:
          name: restore cached meteor bin
          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
      # if there is no cached meteor version, install it
      - 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:"
            meteor --version
            which meteor
            echo "Meteor node version:"
            meteor node -v
            echo "Meteor npm version:"
            meteor npm -v
            echo "Java version:"
            java -version
      - run: 
          name: install yarn
          command: meteor npm i -g yarn
      - run: 
          name: install npm packages
          command: meteor yarn
      - run:
          name: code linting
          command: meteor yarn lint
      # move meteor bin so it can be properly cached
      - run:
          name: copy meteor bin to build cache
          command: |
            mkdir -p ~/build-temp
            cp /usr/local/bin/meteor ~/build-temp/meteor-bin
      # cache meteor& npm packages
      - save_cache:
          key: build-temp-{{ checksum ".meteor/release" }}-{{ checksum ".circleci/config.yml" }}
          paths:
            - ~/build-temp
      - save_cache:
          key: meteor-release-{{ checksum ".meteor/release" }}-{{ checksum ".circleci/config.yml" }}
          paths:
            - ~/.meteor
      - save_cache:
          key: meteor-packages-{{ checksum ".meteor/versions" }}-{{ checksum ".circleci/config.yml" }}
          paths:
            - .meteor/
      - save_cache:
          key: npm-packages-{{ checksum "package.json" }}-{{ checksum ".circleci/config.yml" }}
          paths:
            - ./node_modules/
            - ~/.npm/