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

inputs:
  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 }}
        ACTION_REPOSITORY: ${{ github.action_repository }}
        CACHE_TOKEN: ${{ env.VOCIFERATE_CACHE_TOKEN }}
        SERVER_URL: ${{ github.server_url }}
        API_URL: ${{ github.api_url }}
        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

        if [[ "$ACTION_REF" == v* ]]; then
          release_tag="$ACTION_REF"
          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}"

          provided_cache_token="$(printf '%s' "${CACHE_TOKEN:-}" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
          if [[ -n "$provided_cache_token" ]]; then
            cache_token="$provided_cache_token"
          else
            cache_token="${ACTION_REPOSITORY:-aether/vociferate}-${release_tag}"
          fi

          mkdir -p "$cache_dir"

          echo "use_binary=true"          >> "$GITHUB_OUTPUT"
          echo "release_tag=$release_tag" >> "$GITHUB_OUTPUT"
          echo "cache_token=$cache_token" >> "$GITHUB_OUTPUT"
          echo "asset_name=$asset_name"   >> "$GITHUB_OUTPUT"
          echo "asset_url=$asset_url"     >> "$GITHUB_OUTPUT"
          echo "cache_dir=$cache_dir"     >> "$GITHUB_OUTPUT"
          echo "binary_path=$binary_path" >> "$GITHUB_OUTPUT"
        else
          echo "use_binary=false" >> "$GITHUB_OUTPUT"
        fi

    - name: Setup Go
      if: steps.resolve-binary.outputs.use_binary != 'true'
      uses: actions/setup-go@v5
      with:
        go-version: '1.26.1'
        cache: true
        cache-dependency-path: ${{ github.action_path }}/go.sum

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

    - name: Download vociferate binary
      if: steps.resolve-binary.outputs.use_binary == 'true' && steps.cache-vociferate.outputs.cache-hit != 'true'
      shell: bash
      env:
        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 }}
        USE_BINARY: ${{ steps.resolve-binary.outputs.use_binary }}
        VOCIFERATE_REPOSITORY_URL: ${{ vars.VOCIFERATE_REPOSITORY_URL }}
      run: |
        set -euo pipefail

        if [[ "$USE_BINARY" == "true" ]]; then
          run_vociferate() { "$VOCIFERATE_BIN" "$@"; }
        else
          run_vociferate() { (cd "$GITHUB_ACTION_PATH" && go run ./cmd/vociferate "$@"); }
        fi

        common_args=(--root "$GITHUB_WORKSPACE")

        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 [[ "${{ inputs.recommend }}" == "true" ]]; then
          resolved_version="$(run_vociferate "${common_args[@]}" --recommend)"
          echo "$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="$(run_vociferate "${common_args[@]}" --recommend)"
          fi
        fi

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