version: 2.1

orbs:
  queue: eddiewebb/queue@1.1.2

commands:
  checkout-indexes:
    steps:
      - run:
          name: Checkout
          command: |
            mkdir -p ~/.ssh

            echo 'github.com ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==' >> ~/.ssh/known_hosts

            if [ -e "/home/circleci/project/.git" ]
            then
              cd "/home/circleci/project"
              git remote set-url origin "$CIRCLE_REPOSITORY_URL" || true

              echo "Fetching $INDEXES_BRANCH ..."
              git fetch --force origin "$INDEXES_BRANCH:remotes/origin/$INDEXES_BRANCH"

              echo "Resetting to origin/$INDEXES_BRANCH"
              git reset --hard "origin/$INDEXES_BRANCH"
            else
              mkdir -p "/home/circleci/project"
              cd "/home/circleci/project"
              echo "Cloning $INDEXES_BRANCH ..."
              git clone "$CIRCLE_REPOSITORY_URL" --single-branch --branch "$INDEXES_BRANCH" .
            fi

            echo "Fetching '$CIRCLE_BRANCH' ..."
            git fetch --force origin "$CIRCLE_BRANCH:remotes/origin/$CIRCLE_BRANCH"

jobs:
  update-indexes:
    docker:
       - image: circleci/ruby:2.4.1
    environment:
      INDEXES_BRANCH: indexes
    steps:
      - queue/until_front_of_line
      - restore_cache:
          keys:
            - indexes-source-{{ .Branch }}-{{ .Revision }}
            - indexes-source-{{ .Branch }}-
            - indexes-source-
      - checkout-indexes
      - run:
          name: Git config
          command: |
            git config --global user.email "cocoapods@users.noreply.github.com"
            git config --global user.name "cocoapods"
      - add_ssh_keys:
          fingerprints:
            - "d1:7c:fc:8a:17:63:75:8e:ee:01:13:05:2b:28:ca:49"
      - run:
          name: Rebase latest changes
          command: git rebase "$CIRCLE_SHA1"
      - run:
          name: Generate indexes for the changes
          command: |
            ./Scripts/add_incremental_index.sh "origin/$INDEXES_BRANCH" "$CIRCLE_SHA1" | tee /dev/tty | xargs git add
      - run:
          name: Amend commit and force push the changes
          command: |
            git commit --amend --date="$(date -R)" --no-edit --quiet
            git push origin :"$INDEXES_BRANCH" # Temporary workaround for -f not working below
            git push origin "$INDEXES_BRANCH"
      - save_cache:
          key: indexes-source-{{ .Branch }}-{{ .Revision }}
          paths:
            - ".git"

workflows:
  update-indexes:
    jobs:
      - update-indexes:
          filters:
            branches:
              only: master