get-version-label.yml

name: Get Version Label
on:
  workflow_call:
    inputs:
      workflow_dispatch_version_label:
        description: "Version type"
        required: false
        type: string
    outputs:
      version_label:
        description: the major, minor or patch version label
        value: ${{ jobs.get_version_label.outputs.version_label }}

permissions:
  contents: read

jobs:
  get_version_label:
    runs-on: ubuntu-latest
    outputs:
      version_label: ${{ steps.get_version_label.outputs.version_label }}
    steps:
      - name: Determine version label
        id: get_version_label
        uses: actions/github-script@v7
        with:
          script: |
            if (context.payload.inputs?.workflow_dispatch_version_label) {
              core.setOutput('version_label', context.payload.inputs.workflow_dispatch_version_label.toLowerCase());
              return;
            }
            if (context.payload.pull_request) {
              const allowed = ['patch', 'minor', 'major'];
              const versionLabels = context.payload.pull_request.labels.map(l => l.name.toLowerCase()).filter(label => allowed.includes(label));
              if (versionLabels.length === 0) {
                core.setFailed(`PR must contain one of the version labels: ${allowed.join(', ')}`);
              } else if (versionLabels.length > 1) {
                core.setFailed(`PR contains multiple version labels: ${versionLabels.join(', ')}. Only one of ${allowed.join(', ')} is allowed.`);
              } else {
                core.setOutput('version_label', versionLabels[0]);
              }
            } else {
              core.setFailed('No version input provided and not triggered by a pull request');
            }