CircleCI download artifacts

config.yml

      - run:
          name: Download Coverage Artifacts
          command: |
            LAST_SUCCESSFUL_BUILD=`curl -u $CIRCLE_TOKEN: "https://circleci.com/api/v1.1/project/github/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME?filter=successful&limit=1" | grep '"build_url"' | grep -oE '[0-9]+'`
            curl -u $CIRCLE_TOKEN: "https://circleci.com/api/v1.1/project/github/$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME/$LAST_SUCCESSFUL_BUILD/artifacts" | grep -o 'https://[^"]*.json' | xargs -P4 -I % wget --force-directories --cut-dirs=1 --no-host-directories %?circle-token=$CIRCLE_TOKEN
            for file in `find . -name '*\?*'`; do mv "$file" "${file%%\?*}"; done