name: 'parse-event'
description: 'Parses a JSON file, that contains all information about the last event.'

outputs:
  base-commit:
    description: 'The hash of the base commit of the event. This is the commit that was previously at the head of the branch before the event.'
    value: ${{ steps.parse.outputs.hash }}
  fetch-depth:
    description: 'The number of commits needed to get the whole diff of the event.'
    value: ${{ steps.parse.outputs.count }}

runs:
  using: 'composite'
  steps:
    - name: Install jq
      shell: bash
      run: |
        apt-get update &> /dev/null
        apt-get install -y jq &> /dev/null
        echo "$(which jq): $(jq --version)"

    - name: Parse event
      id: parse
      shell: bash
      run: |
        hash=$(jq -r '.before' "${{ github.event_path }}")
        count=$(jq -r '.commits | length + 1' "${{ github.event_path }}")
        serverUrl="${{ github.server_url }}"
        host=${serverUrl#*://}

        echo "OUT: hash=$hash"
        echo "hash=$hash" >> $GITHUB_OUTPUT

        echo "OUT: count=$count"
        echo "count=$count" >> $GITHUB_OUTPUT

        echo "ENV: CI_SERVER_HOST=$host"
        echo "CI_SERVER_HOST=$host" >> $GITHUB_ENV