name: 'Cargo CI cache'
description: 'Per-branch layered Cargo target-dir cache for Gitea Actions runners.'
inputs:
  cache-root:
    description: 'Mount point of the persistent cache volume.'
    required: false
    default: '/cache'
  protected-branches:
    description: 'Space-separated branches whose cache dirs are never evicted.'
    required: false
    default: 'dev main'
outputs:
  target-dir:
    description: 'Resolved CARGO_TARGET_DIR for this run.'
    value: ${{ steps.probe.outputs.target-dir }}
runs:
  using: 'composite'
  steps:
    - id: probe
      shell: bash
      run: |
        echo "PROBE-OK: composite action resolved and executed"
        echo "  cache-root        = ${{ inputs.cache-root }}"
        echo "  protected-branches= ${{ inputs.protected-branches }}"
        echo "target-dir=${{ inputs.cache-root }}/probe" >> "$GITHUB_OUTPUT"
        echo "PROBE_ENV_WRITE=ok" >> "$GITHUB_ENV"