version: 2

jobs:
  build:
    machine: true
    working_directory: ~/repo

    steps:
      - checkout

      - run:
          name: Choose which test suite to run based on which files were modified
          command: |
            ## Checking commits for changes to Packer files
            ## This handles the cases where there are multiple commits
            if echo "$CIRCLE_COMPARE_URL" | grep '\.\.'; then
              if [ "$(git diff-tree --no-commit-id --name-only -r $(git rev-parse origin/HEAD) $(echo $CIRCLE_COMPARE_URL | cut -d '.' -f 5) | grep -c ^Packer/)" -gt 0 ]; then
                export PACKER_MODIFIED=1
              else
                export PACKER_MODIFIED=0
              fi
            else
              ## This handles the cases where there is only a single commit
              export COMMIT_ID="$(echo $CIRCLE_COMPARE_URL | cut -d '/' -f 7)"
              if [ "$(git diff-tree --no-commit-id --name-only -r $COMMIT_ID | grep -c ^Packer/)" -gt 0 ]; then
                export PACKER_MODIFIED=1
              else
                export PACKER_MODIFIED=0
              fi
            fi
            ## Checking commits for changes to Vagrant files
            if echo "$CIRCLE_COMPARE_URL" | grep '\.\.'; then
              if [ "$(git diff-tree --no-commit-id --name-only -r $(git rev-parse origin/HEAD) $(echo $CIRCLE_COMPARE_URL | cut -d '.' -f 5) | grep -c ^Vagrant/)" -gt 0 ]; then
                export VAGRANT_MODIFIED=1
              else
                export VAGRANT_MODIFIED=0
              fi
            else
              export COMMIT_ID="$(echo $CIRCLE_COMPARE_URL | cut -d '/' -f 7)"
              if [ "$(git diff-tree --no-commit-id --name-only -r $COMMIT_ID | grep -c \"^Vagrant/\")" -gt 0 ]; then
                export VAGRANT_MODIFIED=1
              else
                export VAGRANT_MODIFIED=0
              fi
            fi
            echo "VAGRANT_MODIFIED=$VAGRANT_MODIFIED"
            echo "PACKER_MODIFIED=$PACKER_MODIFIED"
            ## Choosing which test suite to run based on the files that were changed
            if [[ "$PACKER_MODIFIED" -eq 1 ]] && [[ "$VAGRANT_MODIFIED" -eq 1 ]]; then
              echo "Running the test suite for Packer and Vagrant changes"
              chmod +x ci/circle_workflows/packer_and_vagrant_changes.sh
              ci/circle_workflows/packer_and_vagrant_changes.sh
              exit 0
            fi
            if [[ "$PACKER_MODIFIED" -eq 0 ]] && [[ "$VAGRANT_MODIFIED" -eq 0 ]]; then
              echo "Running the default test suite (Vagrant-only)"
              chmod +x ci/circle_workflows/vagrant_changes.sh
              ci/circle_workflows/vagrant_changes.sh
              exit 0
            fi
            if [ "$PACKER_MODIFIED" -eq 1 ]; then
              echo "Running the test suite for Packer-only changes"
              chmod +x ci/circle_workflows/packer_changes.sh
              ci/circle_workflows/packer_changes.sh
              exit 0
            fi
            if [ "$VAGRANT_MODIFIED" -eq 1 ]; then
              echo "Running the test suite for Vagrant-only changes"
              chmod +x ci/circle_workflows/vagrant_changes.sh
              ci/circle_workflows/vagrant_changes.sh
              exit 0
            fi

      - store_artifacts:
          path: /tmp/artifacts