name: Conditional Variables

description: |
  Evaluates a list of conditions and exposes variables as outputs.
  Conditions are evaluated in order. All matching conditions are applied.
  If multiple conditions set the same variable, the last matching value wins.

inputs:
  context:
    description: |
      Context variables available during condition evaluation.

  conditions:
    description: |
      List of conditions to evaluate.

      Example:

        - when:
            branch:
              - 9.0-alpine-24
              - 9.0-alpine-23
          set:
            DOTNET_VERSION: 9.0

    required: true

  fail-on-no-match:
    description: |
      Fail the action when no condition matches.
    required: false
    default: "false"

runs:
  using: composite

  steps:
    - name: Evaluate conditions
      shell: bash
      env:
        CONTEXT: ${{ inputs.context }}
        CONDITIONS: ${{ inputs.conditions }}
        FAIL_ON_NO_MATCH: ${{ inputs.fail-on-no-match }}
      run: |
        "${{ github.action_path }}/evaluate.sh"