ansible-count-hosts.yaml

---
name: Count Ansible hosts

on:
  workflow_call:
    inputs:
      inventory_file:
        type: string
        description: "Relative path to the inventory file in the repository"
        required: true
      limit:
        type: string
        description: "Ansible limit that will have its hosts counted"
        required: true
      requirements_file:
        type: string
        description: "Relative path to the requirements file containing the Ansible version"
        default: requirements.txt
    outputs:
      count:
        value: ${{ jobs.job.outputs.count }}

jobs:
  job:
    runs-on: ubuntu-latest
    outputs:
      count: ${{ steps.count_hosts.outputs.count }}
    steps:
      - uses: actions/checkout@v4
      - name: Create virtual environment and install ansible
        run: |
          python -m venv .venv
          source .venv/bin/activate
          # Only keep Ansible in the pip requirements
          pip3 install $(grep ansible $GITHUB_WORKSPACE/${{ inputs.requirements_file }})
          echo "$VIRTUAL_ENV/bin" >> $GITHUB_PATH
          echo "VIRTUAL_ENV=$VIRTUAL_ENV" >> $GITHUB_ENV
      - name: Count hosts in limit
        id: count_hosts
        run: |
          echo "count=$(ansible-inventory -i $GITHUB_WORKSPACE/${{ inputs.inventory_file }} --list -l ${{ inputs.limit }} | jq -e '._meta.hostvars | keys | length')" >> $GITHUB_OUTPUT