Module: Yard::Fence

Defined in:
lib/yard/fence.rb,
lib/yard/fence/version.rb,
lib/yard/fence/rake_task.rb,
lib/yard/fence/kramdown_gfm_document.rb

Defined Under Namespace

Modules: HtmlHelperPatch, Version Classes: Error, KramdownGfmDocument, RakeTask

Constant Summary collapse

ASCII_BRACES = 
"{}"
FULLWIDTH_BRACES = 
"｛｝"
RAKE_INTEGRATIONS = 
{}
RAKE_INTEGRATIONS_MUTEX = 
Mutex.new
KRAMDOWN_PROVIDER =

IMPORTANT: YARD expects :const to be a String. YARD concatenates with a String prefix (e.g., “::” + const), so a Symbol here will break provider resolution. Some static analyzers suggest making this a Symbol to match types, but that is incorrect for YARD. Do NOT change this to a Symbol.

{lib: :kramdown, const: "KramdownGfmDocument"}
GLOB_PATTERN = 
"*.{md,MD,txt,TXT}"
TRIPLE_TICK_FENCE = 
/^\s*```/
INLINE_TICK_FENCE = 
/`([^`]+)`/
DOUBLE_BRACE_PLACEHOLDER_REGEX = 
/{{([^{}]+)}}/
SINGLE_BRACE_PLACEHOLDER_REGEX = 
/{([A-Za-z0-9_:-]+)}/
BRACED_TOKEN_REFERENCE_REGEX = 
/{([^{}]*(?:\\?\|)[^{}]*)}/
BRACED_HTML_FRAGMENT_REGEX = 
/{([^{}]*<\/?[A-Za-z][^{}]*)}/
INDENTED_CODE_LINE =

Lines that are part of a classic indented code block (CommonMark: 4 spaces)

/^ {4,}\S/
HTML_HELPER_TEMPLATE_PATCH = 
proc do |options|
  HtmlHelperPatch if options.format == :html
end
VERSION =

Traditional Constant Location

Version::VERSION

Class Method Summary collapse

Class Method Details

.__reset_rake_integrations__ ⇒ Object 



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# File 'lib/yard/fence.rb', line 116

def __reset_rake_integrations__
  RAKE_INTEGRATIONS_MUTEX.synchronize { RAKE_INTEGRATIONS.clear }
  nil
end

.at_load_hook ⇒ Object

Deprecated.

Use prepare_for_yard instead. This method is kept for backward compatibility but does nothing at load time. Call prepare_for_yard from a rake task.



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# File 'lib/yard/fence.rb', line 329

def at_load_hook
  # INTENTIONALLY EMPTY
  # Previously this ran at load time, but that caused docs/ to be cleared
  # during unrelated rake tasks like `build` and `release`.
  # All preparation now happens via the yard:fence:prepare rake task.
  nil
end

.clean_docs_directory ⇒ Object

Clear the docs output directory to remove stale generated files. Only runs when YARD_FENCE_CLEAN_DOCS=true is set. This ensures that if a markdown file is deleted from the project, its corresponding HTML file won’t remain in docs/.



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# File 'lib/yard/fence.rb', line 301

def clean_docs_directory
  return unless ENV.fetch("YARD_FENCE_CLEAN_DOCS", "false").casecmp?("true")

  docs = File.join(Dir.pwd, "docs")
  return unless Dir.exist?(docs)

  FileUtils.rm_rf(docs)
  puts "[yard/fence] Cleared docs/ directory (YARD_FENCE_CLEAN_DOCS=true)"
end

.fullwidth_braces(str) ⇒ Object

Replace ASCII { } with Unicode fullwidth ｛ ｝. Visual effect in browsers is the same, but YARD’s link matcher won’t recognize them.



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# File 'lib/yard/fence.rb', line 123

def fullwidth_braces(str)
  str.tr(ASCII_BRACES, FULLWIDTH_BRACES)
end

.install_html_helper_patch! ⇒ Object 



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# File 'lib/yard/fence.rb', line 271

def install_html_helper_patch!
  begin
    require "yard" unless defined?(::YARD::Templates::Template)
    require "yard/templates/helpers/html_helper" unless defined?(::YARD::Templates::Helpers::HtmlHelper)
  rescue LoadError, NameError => e
    warn("Yard::Fence.install_html_helper_patch!: failed to load YARD HTML helper: #{e.class}: #{e.message}")
    return false
  end

  extra_includes = ::YARD::Templates::Template.extra_includes
  extra_includes << HTML_HELPER_TEMPLATE_PATCH unless extra_includes.include?(HTML_HELPER_TEMPLATE_PATCH)

  helper = ::YARD::Templates::Helpers::HtmlHelper
  return true if helper.method_defined?(:yard_fence_unprotected_resolve_links)

  helper.module_eval do
    alias_method(:yard_fence_unprotected_resolve_links, :resolve_links)

    def resolve_links(text)
      protected_text = ::Yard::Fence.sanitize_prose_braces(text.to_s)
      ::Yard::Fence.restore_ascii_braces(yard_fence_unprotected_resolve_links(protected_text))
    end
  end
  true
end

.install_rake_tasks!(yard_task_name = :yard) ⇒ Object 



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# File 'lib/yard/fence.rb', line 90

def install_rake_tasks!(yard_task_name = :yard)
  return false unless defined?(::Rake::Task)

  require_relative "fence/rake_task"

  ::Yard::Fence::RakeTask.new unless ::Rake::Task.task_defined?("yard:fence:prepare")
  return true unless ::Rake::Task.task_defined?(yard_task_name)

  yard_task = ::Rake::Task[yard_task_name]
  prereqs = yard_task.prerequisites.map(&:to_s)
  yard_task.enhance(["yard:fence:prepare"]) unless prereqs.include?("yard:fence:prepare")

  RAKE_INTEGRATIONS_MUTEX.synchronize do
    key = yard_task_name.to_s
    unless RAKE_INTEGRATIONS[key]
      yard_task.enhance { ::Yard::Fence.postprocess_html_docs }
      RAKE_INTEGRATIONS[key] = true
    end
  end

  true
rescue LoadError => e
  warn("Yard::Fence.install_rake_tasks!: failed to load rake integration: #{e.class}: #{e.message}")
  false
end

.postprocess_html_docs ⇒ Object 



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# File 'lib/yard/fence.rb', line 218

def postprocess_html_docs
  if ENV.fetch("YARD_FENCE_DISABLE", "false").casecmp?("true")
    # :nocov:
    warn("[yard/fence] postprocess_html_docs disabled via YARD_FENCE_DISABLE")
    # :nocov:
  else
    docs = File.join(Dir.pwd, "docs")
    return unless Dir.exist?(docs)
    Dir.glob(File.join(docs, "**", "*.html")).each do |html|
      restore_ascii_braces_in_html_file(html)
    end
  end
rescue => e
  warn("Yard::Fence.postprocess_html_docs failed: #{e.class}: #{e.message}")
end

.prepare_for_yard ⇒ Object

Prepare for YARD documentation generation. This method should be called from a rake task BEFORE yard runs, not at load time. It cleans the docs directory (if YARD_FENCE_CLEAN_DOCS=true) and prepares tmp files.



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# File 'lib/yard/fence.rb', line 314

def prepare_for_yard
  if ENV.fetch("YARD_FENCE_DISABLE", "false").casecmp?("true")
    # :nocov:
    warn("[yard/fence] prepare_for_yard disabled via YARD_FENCE_DISABLE")
    # :nocov:
  else
    Yard::Fence.clean_docs_directory
    Yard::Fence.prepare_tmp_files
  end
rescue => e
  warn("Yard::Fence: failed to prepare for YARD: #{e.class}: #{e.message}")
end

.prepare_tmp_files ⇒ Object

Copy top-level .md/.txt into tmp/yard-fence/ with the above sanitization applied. Clears the staging directory first to prevent stale files from persisting.



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# File 'lib/yard/fence.rb', line 187

def prepare_tmp_files
  root = Dir.pwd
  outdir = File.join(root, "tmp", "yard-fence")

  # Clear existing staging directory to prevent stale files from persisting.
  # This ensures that if a markdown file is deleted from the project root,
  # it won't remain in tmp/yard-fence/ and get included in documentation.
  FileUtils.rm_rf(outdir)
  FileUtils.mkdir_p(outdir)

  candidates = Dir.glob(File.join(root, GLOB_PATTERN))
  candidates.each do |src|
    next unless File.file?(src)
    content = File.read(src)
    sanitized = sanitize_text(content)
    dst = File.join(outdir, File.basename(src))
    File.write(dst, sanitized)
  end
end

.restore_ascii_braces(text) ⇒ Object 



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# File 'lib/yard/fence.rb', line 214

def restore_ascii_braces(text)
  text.tr(FULLWIDTH_BRACES, ASCII_BRACES)
end

.restore_ascii_braces_in_html_file(html_filepath) ⇒ Object 



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# File 'lib/yard/fence.rb', line 207

def restore_ascii_braces_in_html_file(html_filepath)
  return unless File.file?(html_filepath)
  content = File.read(html_filepath)
  restored = content.tr(FULLWIDTH_BRACES, ASCII_BRACES)
  File.write(html_filepath, restored)
end

.sanitize_fenced_blocks(text) ⇒ Object

Walk the text, toggling a simple in_fence state on “‘ lines. While inside a fence, convert braces to fullwidth; outside, also sanitize inline code and disarm simple prose placeholders like ｛issuer｝ or ｛｛something｝｝.



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# File 'lib/yard/fence.rb', line 149

def sanitize_fenced_blocks(text)
  in_fence = false
  in_indented_block = false

  text.each_line.map do |line|
    if line.match?(TRIPLE_TICK_FENCE)
      # Toggle fenced block state; leaving indented block if switching into explicit fence
      in_fence = !in_fence
      in_indented_block = false if in_fence
      line
    elsif in_fence
      fullwidth_braces(line)
    elsif in_indented_block
      # Continue indented block until a blank line or non-indented line breaks it
      if line.strip.empty? || !line.match?(INDENTED_CODE_LINE)
        in_indented_block = false
        # Process this line as normal prose outside block
        sanitize_prose_braces(line)
      else
        fullwidth_braces(line)
      end
    elsif line.match?(INDENTED_CODE_LINE)
      # Enter indented code block on first qualifying line
      in_indented_block = true
      fullwidth_braces(line)
    else
      sanitize_prose_braces(line)
    end
  end.join
end

.sanitize_inline_code(line) ⇒ Object

Escape braces inside inline ‘code` spans only.



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# File 'lib/yard/fence.rb', line 128

def sanitize_inline_code(line)
  # Use Regexp.last_match to safely access capture; to_s guards against nil
  line.gsub(INLINE_TICK_FENCE) do |_|
    inner = Regexp.last_match(1).to_s
    "`#{fullwidth_braces(inner)}`"
  end
end

.sanitize_prose_braces(line) ⇒ Object 



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# File 'lib/yard/fence.rb', line 136

def sanitize_prose_braces(line)
  ln = sanitize_inline_code(line)
  # IMPORTANT: handle double-brace placeholders first so we don't partially
  # convert the inner {TOKEN} and leave outer ASCII braces from `{｛TOKEN｝}`.
  ln = ln.gsub(DOUBLE_BRACE_PLACEHOLDER_REGEX) { |m| fullwidth_braces(m) }
  ln = ln.gsub(BRACED_TOKEN_REFERENCE_REGEX) { |m| fullwidth_braces(m) }
  ln = ln.gsub(BRACED_HTML_FRAGMENT_REGEX) { |m| fullwidth_braces(m) }
  ln.gsub(SINGLE_BRACE_PLACEHOLDER_REGEX) { |m| fullwidth_braces(m) }
end

.sanitize_text(text) ⇒ Object 



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# File 'lib/yard/fence.rb', line 180

def sanitize_text(text)
  return text unless text.is_a?(String)
  sanitize_fenced_blocks(text)
end

.use_kramdown_gfm! ⇒ Object

Register Kramdown GFM as the highest priority Markdown provider in YARD. Returns true if registration succeeded, false otherwise.

This method is intentionally not executed at file load to avoid circular require warnings when YARD is in the middle of loading itself. Call this from a file loaded via .yardopts (e.g. ‘-e ’require “yard/fence/kramdown_gfm”; Yard::Fence.use_kramdown_gfm!‘`).



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# File 'lib/yard/fence.rb', line 240

def use_kramdown_gfm!
  # :nocov:
  # Not covering, because kramdown support is tested, so this rescue is not hit in test runs.
  unless defined?(Yard::Fence::KramdownGfmDocument)
    raise Error, "Yard::Fence: Kramdown GFM provider not loaded. Add kramdown and kramdown-parser-gfm to your Gemfile."
  end
  # :nocov:
  providers = ::YARD::Templates::Helpers::MarkupHelper::MARKUP_PROVIDERS[:markdown]
  # NOTE: Intentionally using String for :const in KRAMDOWN_PROVIDER.
  # YARD performs string concatenation with this value (e.g., "::" + const).
  # Changing it to a Symbol to satisfy static type hints breaks runtime behavior.
  # Suppress type fuzz complaints: expected Hash{Symbol->Symbol}, actual includes String by design.
  providers.unshift(KRAMDOWN_PROVIDER)
  providers.uniq! { |p| [p[:lib].to_s, p[:const].to_s] }
  true
rescue NameError => e
  warn("Yard::Fence.use_kramdown_gfm!: failed to load YARD helper: #{e.class}: #{e.message}")
  false
end