name: vociferate
description: Prepare release files or recommend a next semantic version tag.

inputs:
  token:
    description: Optional token used to download the cached vociferate release binary. When omitted, the workflow token is used.
    required: false
    default: ''
  version:
    description: Optional semantic version override. When omitted, the recommended version is used.
    required: false
  version-file:
    description: Path to version file relative to repository root. When omitted, the current version is derived from the most recent released section in the changelog.
    required: false
    default: ''
  version-pattern:
    description: Regular expression with one capture group for current version. Only required when version-file is set.
    required: false
    default: ''
  changelog:
    description: Path to changelog file relative to repository root.
    required: false
    default: changelog.md
  recommend:
    description: If true, print recommended next release tag.
    required: false
    default: 'false'

outputs:
  version:
    description: Resolved version used for prepare mode, or the emitted recommended version for recommend mode.
    value: ${{ steps.run-vociferate.outputs.version }}

runs:
  using: composite
  steps:
    - uses: actions/checkout@v4

    - name: Resolve vociferate binary metadata
      id: resolve-binary
      shell: bash
      env:
        ACTION_REF: ${{ github.action_ref }}
        SERVER_URL: ${{ github.server_url }}
        API_URL: ${{ github.api_url }}
        TOKEN: ${{ inputs.token != '' && inputs.token || github.token }}
        RUNNER_ARCH: ${{ runner.arch }}
        RUNNER_TEMP: ${{ runner.temp }}
      run: |
        set -euo pipefail

        case "$RUNNER_ARCH" in
          X64)
            arch="amd64"
            ;;
          ARM64)
            arch="arm64"
            ;;
          *)
            echo "Unsupported runner architecture: $RUNNER_ARCH" >&2
            exit 1
            ;;
        esac

        release_tag="$ACTION_REF"
        if [[ -z "$release_tag" || "$release_tag" == refs/* || "$release_tag" != v* ]]; then
          release_tag="$(curl -fsSL \
            -H "Authorization: token ${TOKEN}" \
            -H "Content-Type: application/json" \
            "${API_URL}/repos/aether/vociferate/releases/latest" | sed -n 's/.*"tag_name"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p' | head -n 1)"
        fi

        if [[ -z "$release_tag" ]]; then
          echo "Unable to resolve a vociferate release tag for binary download" >&2
          exit 1
        fi

        normalized_version="${release_tag#v}"
        asset_name="vociferate_${normalized_version}_linux_${arch}"
        cache_dir="${RUNNER_TEMP}/vociferate/${release_tag}/linux-${arch}"
        binary_path="${cache_dir}/vociferate"
        asset_url="${SERVER_URL}/aether/vociferate/releases/download/${release_tag}/${asset_name}"

        mkdir -p "$cache_dir"

        echo "release_tag=$release_tag" >> "$GITHUB_OUTPUT"
        echo "asset_name=$asset_name" >> "$GITHUB_OUTPUT"
        echo "asset_url=$asset_url" >> "$GITHUB_OUTPUT"
        echo "cache_dir=$cache_dir" >> "$GITHUB_OUTPUT"
        echo "binary_path=$binary_path" >> "$GITHUB_OUTPUT"

    - name: Restore cached vociferate binary
      id: cache-vociferate
      uses: actions/cache@v4
      with:
        path: ${{ steps.resolve-binary.outputs.cache_dir }}
        key: vociferate-${{ steps.resolve-binary.outputs.release_tag }}-linux-${{ runner.arch }}

    - name: Download vociferate binary
      if: steps.cache-vociferate.outputs.cache-hit != 'true'
      shell: bash
      env:
        TOKEN: ${{ inputs.token != '' && inputs.token || github.token }}
        ASSET_URL: ${{ steps.resolve-binary.outputs.asset_url }}
        BINARY_PATH: ${{ steps.resolve-binary.outputs.binary_path }}
      run: |
        set -euo pipefail

        curl --fail --location \
          -H "Authorization: token ${TOKEN}" \
          -o "$BINARY_PATH" \
          "$ASSET_URL"
        chmod +x "$BINARY_PATH"

    - name: Run vociferate
      id: run-vociferate
      shell: bash
      env:
        VOCIFERATE_BIN: ${{ steps.resolve-binary.outputs.binary_path }}
      run: |
        set -euo pipefail

        common_args=(--root .)

        if [[ -n "${{ inputs.version-file }}" ]]; then
          common_args+=(--version-file "${{ inputs.version-file }}")
        fi

        if [[ -n "${{ inputs.version-pattern }}" ]]; then
          common_args+=(--version-pattern "${{ inputs.version-pattern }}")
        fi

        if [[ -n "${{ inputs.changelog }}" ]]; then
          common_args+=(--changelog "${{ inputs.changelog }}")
        fi

        if [[ "${{ inputs.recommend }}" == "true" ]]; then
          resolved_version="$("$VOCIFERATE_BIN" "${common_args[@]}" --recommend)"
          echo "$resolved_version"
          echo "version=$resolved_version" >> "$GITHUB_OUTPUT"
          exit 0
        else
          resolved_version="$(printf '%s' "${{ inputs.version }}" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
          if [[ -z "$resolved_version" ]]; then
            resolved_version="$("$VOCIFERATE_BIN" "${common_args[@]}" --recommend)"
          fi
        fi

        echo "version=$resolved_version" >> "$GITHUB_OUTPUT"
        "$VOCIFERATE_BIN" "${common_args[@]}" --version "$resolved_version" --date "$(date -u +%F)"