Module: Jazzy::SourceKitten

Defined in:
lib/jazzy/sourcekitten.rb

Overview

This module interacts with the sourcekitten command-line executable

Class Method Summary collapse

Class Method Details

.ancestor_name_match(name_part, doc) ⇒ Object

Find the first ancestor of doc whose name matches name_part.



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# File 'lib/jazzy/sourcekitten.rb', line 415

def self.ancestor_name_match(name_part, doc)
  doc.namespace_ancestors.reverse_each do |ancestor|
    if match = name_match(name_part, ancestor.children)
      return match
    end
  end
  nil
end

.arguments_from_options(options) ⇒ Object

Builds SourceKitten arguments based on Jazzy options



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# File 'lib/jazzy/sourcekitten.rb', line 118

def self.arguments_from_options(options)
  arguments = ['doc']
  if options.objc_mode
    if options.xcodebuild_arguments.empty?
      arguments += ['--objc', options.umbrella_header.to_s, '-x',
                    'objective-c', '-isysroot',
                    `xcrun --show-sdk-path`.chomp, '-I',
                    options.framework_root.to_s]
    end
  elsif !options.module_name.empty?
    arguments += ['--module-name', options.module_name]
  end
  arguments + options.xcodebuild_arguments
end

.autolink(docs, root_decls) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 457

def self.autolink(docs, root_decls)
  docs.each do |doc|
    doc.abstract = autolink_text(doc.abstract, doc, root_decls)
    doc.return = autolink_text(doc.return, doc, root_decls) if doc.return
    doc.children = autolink(doc.children, root_decls)
  end
end

.autolink_text(text, doc, root_decls) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 432

def self.autolink_text(text, doc, root_decls)
  text.gsub(%r{<code>[ \t]*([^\s]+)[ \t]*</code>}) do
    original = Regexp.last_match(0)
    raw_name = Regexp.last_match(1)
    parts = raw_name
            .split(/(?<!\.)\.(?!\.)/) # dot with no neighboring dots
            .reject(&:empty?)

    # First dot-separated component can match any ancestor or top-level doc
    first_part = parts.shift
    name_root = ancestor_name_match(first_part, doc) ||
                name_match(first_part, root_decls)

    # Traverse children via subsequence components, if any
    link_target = name_traversal(parts, name_root)

    if link_target && link_target.url && link_target.url != doc.url
      "<code><a href=\"#{ELIDED_AUTOLINK_TOKEN}#{link_target.url}\">" +
        raw_name + '</a></code>'
    else
      original
    end
  end
end

.comment_from_doc(doc) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 235

def self.comment_from_doc(doc)
  swift_version = Config.instance.swift_version.to_f
  comment = doc['key.doc.comment'] || ''
  if swift_version < 2
    # comment until first ReST definition
    matches = /^\s*:[^\s]+:/.match(comment)
    comment = comment[0...matches.begin(0)] if matches
  end
  Jazzy.markdown.render(comment)
end

.deduplicate_declarations(declarations) ⇒ Object

Merges multiple extensions of the same entity into a single document.

Merges extensions into the protocol/class/struct/enum they extend, if it occurs in the same project.

Merges redundant declarations when documenting podspecs.



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# File 'lib/jazzy/sourcekitten.rb', line 319

def self.deduplicate_declarations(declarations)
  duplicate_groups = declarations
                     .group_by { |d| deduplication_key(d) }
                     .values

  duplicate_groups.map do |group|
    # Put extended type (if present) before extensions
    merge_declarations(group)
  end
end

.deduplication_key(decl) ⇒ Object

Two declarations get merged if they have the same deduplication key.



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# File 'lib/jazzy/sourcekitten.rb', line 331

def self.deduplication_key(decl)
  if decl.type.swift_extensible? || decl.type.swift_extension?
    [decl.usr]
  else
    [decl.usr, decl.type.kind]
  end
end

.doc_coverage ⇒ Object

rubocop:enable Metrics/PerceivedComplexity rubocop:enable Metrics/CyclomaticComplexity rubocop:enable Metrics/MethodLength



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# File 'lib/jazzy/sourcekitten.rb', line 307

def self.doc_coverage
  return 0 if @documented_count == 0 && @undocumented_tokens.count == 0
  (100 * @documented_count) /
    (@undocumented_tokens.count + @documented_count)
end

.documented_child?(doc) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jazzy/sourcekitten.rb', line 154

def self.documented_child?(doc)
  return false unless doc['key.substructure']
  doc['key.substructure'].any? { |child| documented_child?(child) }
end

.filter_excluded_files(json) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 395

def self.filter_excluded_files(json)
  excluded_files = Config.instance.excluded_files
  json.map do |doc|
    key = doc.keys.first
    doc[key] unless excluded_files.include?(Pathname(key))
  end.compact
end

.group_custom_categories(docs) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 28

def self.group_custom_categories(docs)
  group = Config.instance.custom_categories.map do |category|
    children = category['children'].flat_map do |name|
      docs_with_name, docs = docs.partition { |doc| doc.name == name }
      if docs_with_name.empty?
        STDERR.puts 'WARNING: No documented top-level declarations match ' \
                    "name \"#{name}\" specified in categories file"
      end
      docs_with_name
    end
    # Category config overrides alphabetization
    children.each.with_index { |child, i| child.nav_order = i }
    make_group(children, category['name'], '')
  end
  [group.compact, docs]
end

.group_docs(docs) ⇒ Object

Group root-level docs by custom categories (if any) and type



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# File 'lib/jazzy/sourcekitten.rb', line 21

def self.group_docs(docs)
  custom_categories, docs = group_custom_categories(docs)
  type_categories, uncategorized = group_type_categories(
    docs, custom_categories.any? ? 'Other ' : '')
  custom_categories + type_categories + uncategorized
end

.group_type_categories(docs, type_category_prefix) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 45

def self.group_type_categories(docs, type_category_prefix)
  group = SourceDeclaration::Type.all.map do |type|
    children, docs = docs.partition { |doc| doc.type == type }
    make_group(
      children,
      type_category_prefix + type.plural_name,
      "The following #{type.plural_name.downcase} are available globally.")
  end
  [group.compact, docs]
end

.make_default_doc_info(declaration) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 145

def self.make_default_doc_info(declaration)
  # @todo: Fix these
  declaration.line = 0
  declaration.column = 0
  declaration.abstract = 'Undocumented'
  declaration.parameters = []
  declaration.children = []
end

.make_doc_info(doc, declaration) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 214

def self.make_doc_info(doc, declaration)
  return unless should_document?(doc)
  unless doc['key.doc.full_as_xml']
    return process_undocumented_token(doc, declaration)
  end

  declaration.line = doc['key.doc.line']
  declaration.column = doc['key.doc.column']
  declaration.declaration = Highlighter.highlight(
    doc['key.parsed_declaration'] || doc['key.doc.declaration'],
    Config.instance.objc_mode ? 'objc' : 'swift',
  )
  declaration.abstract = comment_from_doc(doc)
  declaration.discussion = ''
  declaration.return = make_paragraphs(doc, 'key.doc.result_discussion')

  declaration.parameters = parameters(doc)

  @documented_count += 1
end

.make_doc_urls(docs) ⇒ Hash

rubocop:disable Metrics/MethodLength Generate doc URL by prepending its parents URLs

Returns:

  • (Hash) —

    input docs with URLs



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# File 'lib/jazzy/sourcekitten.rb', line 68

def self.make_doc_urls(docs)
  docs.each do |doc|
    if !doc.parent_in_docs || doc.children.count > 0
      # Create HTML page for this doc if it has children or is root-level
      doc.url = (
        subdir_for_doc(doc) +
        [doc.name + '.html']
      ).join('/')
      doc.children = make_doc_urls(doc.children)
    else
      # Don't create HTML page for this doc if it doesn't have children
      # Instead, make its link a hash-link on its parent's page
      if doc.typename == '<<error type>>'
        warn 'A compile error prevented ' +
          doc.fully_qualified_name +
          ' from receiving a unique USR. Documentation may be ' \
          'incomplete. Please check for compile errors by running ' \
          "`xcodebuild #{Config.instance.xcodebuild_arguments.shelljoin}`."
      end
      id = doc.usr
      unless id
        id = doc.name || 'unknown'
        warn "`#{id}` has no USR. First make sure all modules used in " \
          'your project have been imported. If all used modules are ' \
          'imported, please report this problem by filing an issue at ' \
          'https://github.com/realm/jazzy/issues along with your Xcode ' \
          'project. If this token is declared in an `#if` block, please ' \
          'ignore this message.'
      end
      doc.url = doc.parent_in_docs.url + '#/' + id
    end
  end
end

.make_group(group, name, abstract) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 56

def self.make_group(group, name, abstract)
  SourceDeclaration.new.tap do |sd|
    sd.type     = SourceDeclaration::Type.overview
    sd.name     = name
    sd.abstract = abstract
    sd.children = group
  end unless group.empty?
end

.make_paragraphs(doc, key) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 188

def self.make_paragraphs(doc, key)
  return nil unless doc[key]
  doc[key].map do |p|
    if para = p['Para']
      Jazzy.markdown.render(para)
    elsif code = p['Verbatim'] || p['CodeListing']
      Jazzy.markdown.render("```\n#{code}```\n")
    else
      warn "Jazzy could not recognize the `#{p.keys.first}` tag. " \
           'Please report this by filing an issue at ' \
           'https://github.com/realm/jazzy/issues along with the comment ' \
           'including this tag.'
      Jazzy.markdown.render(p.values.first)
    end
  end.join
end

.make_source_declarations(docs, parent = nil) ⇒ Object

rubocop:disable Metrics/MethodLength rubocop:disable Metrics/CyclomaticComplexity rubocop:disable Metrics/PerceivedComplexity



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# File 'lib/jazzy/sourcekitten.rb', line 260

def self.make_source_declarations(docs, parent = nil)
  declarations = []
  current_mark = SourceMark.new
  Array(docs).each do |doc|
    if doc.key?('key.diagnostic_stage')
      declarations += make_source_declarations(
        doc['key.substructure'], parent)
      next
    end
    declaration = SourceDeclaration.new
    declaration.parent_in_code = parent
    declaration.type = SourceDeclaration::Type.new(doc['key.kind'])
    declaration.typename = doc['key.typename']
    current_mark = SourceMark.new(doc['key.name']) if declaration.type.mark?
    if declaration.type.swift_enum_case?
      # Enum "cases" are thin wrappers around enum "elements".
      declarations += make_source_declarations(
        doc['key.substructure'], parent)
      next
    end
    next unless declaration.type.should_document?

    unless declaration.type.name
      raise 'Please file an issue at ' \
            'https://github.com/realm/jazzy/issues about adding support ' \
            "for `#{declaration.type.kind}`."
    end

    declaration.file = Pathname(doc['key.filepath']) if doc['key.filepath']
    declaration.usr  = doc['key.usr']
    declaration.name = doc['key.name']
    declaration.mark = current_mark
    declaration.access_control_level =
      SourceDeclaration::AccessControlLevel.from_doc(doc)
    declaration.start_line = doc['key.parsed_scope.start']
    declaration.end_line = doc['key.parsed_scope.end']

    next unless make_doc_info(doc, declaration)
    make_substructure(doc, declaration)
    declarations << declaration
  end
  declarations
end

.make_substructure(doc, declaration) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 246

def self.make_substructure(doc, declaration)
  if doc['key.substructure']
    declaration.children = make_source_declarations(
      doc['key.substructure'],
      declaration,
    )
  else
    declaration.children = []
  end
end

.mark_members_from_protocol_extension(extensions) ⇒ Object

Protocol methods provided only in an extension and not in the protocol itself are a special beast: they do not use dynamic dispatch. These get an “Extension method” annotation in the generated docs.



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# File 'lib/jazzy/sourcekitten.rb', line 387

def self.mark_members_from_protocol_extension(extensions)
  extensions.each do |ext|
    ext.children.each do |ext_member|
      ext_member.from_protocol_extension = true
    end
  end
end

.merge_declarations(decls) ⇒ Object

Merges all of the given types and extensions into a single document.



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# File 'lib/jazzy/sourcekitten.rb', line 340

def self.merge_declarations(decls)
  extensions, typedecls = decls.partition { |d| d.type.swift_extension? }

  if typedecls.size > 1
    warn 'Found conflicting type declarations with the same name, which ' \
      'may indicate a build issue or a bug in Jazzy: ' +
      typedecls.map { |t| "#{t.type.name.downcase} #{t.name}" }.join(', ')
  end
  typedecl = typedecls.first

  if typedecl && typedecl.type.swift_protocol?
    merge_default_implementations_into_protocol(typedecl, extensions)
    mark_members_from_protocol_extension(extensions)
    extensions.reject! { |ext| ext.children.empty? }
  end

  decls = typedecls + extensions
  decls.first.tap do |merged|
    merged.children = deduplicate_declarations(
      decls.flat_map(&:children).uniq)
    merged.children.each do |child|
      child.parent_in_code = merged
    end
  end
end

.merge_default_implementations_into_protocol(protocol, extensions) ⇒ Object

If any of the extensions provide default implementations for methods in the given protocol, merge those members into the protocol doc instead of keeping them on the extension. These get a “Default implementation” annotation in the generated docs.



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# File 'lib/jazzy/sourcekitten.rb', line 370

def self.merge_default_implementations_into_protocol(protocol, extensions)
  protocol.children.each do |proto_method|
    extensions.each do |ext|
      defaults, ext.children = ext.children.partition do |ext_member|
        ext_member.name == proto_method.name
      end
      unless defaults.empty?
        proto_method.default_impl_abstract =
          defaults.flat_map { |d| [d.abstract, d.discussion] }.join("\n\n")
      end
    end
  end
end

.name_match(name_part, docs) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 403

def self.name_match(name_part, docs)
  return nil unless name_part
  wildcard_expansion = Regexp.escape(name_part)
                       .gsub('\.\.\.', '[^)]*')
                       .gsub(/&lt;.*&gt;/, '')
  whole_name_pat = /\A#{wildcard_expansion}\Z/
  docs.find do |doc|
    whole_name_pat =~ doc.name
  end
end

.name_traversal(name_parts, doc) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 424

def self.name_traversal(name_parts, doc)
  while doc && !name_parts.empty?
    next_part = name_parts.shift
    doc = name_match(next_part, doc.children)
  end
  doc
end

.parameters(doc) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 205

def self.parameters(doc)
  (doc['key.doc.parameters'] || []).map do |p|
    {
      name: p['name'],
      discussion: make_paragraphs(p, 'discussion'),
    }
  end
end

.parse(sourcekitten_output, min_acl, skip_undocumented) ⇒ Hash

Parse sourcekitten STDOUT output as JSON

Returns:

  • (Hash) —

    structured docs



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# File 'lib/jazzy/sourcekitten.rb', line 479

def self.parse(sourcekitten_output, min_acl, skip_undocumented)
  @min_acl = min_acl
  @skip_undocumented = skip_undocumented
  sourcekitten_json = filter_excluded_files(JSON.parse(sourcekitten_output))
  docs = make_source_declarations(sourcekitten_json)
  docs = ungrouped_docs = deduplicate_declarations(docs)
  docs = group_docs(docs)
  if Config.instance.objc_mode
    docs = reject_objc_enum_typedefs(docs)
  else
    # Remove top-level enum cases because it means they have an ACL lower
    # than min_acl
    docs = docs.reject { |doc| doc.type.swift_enum_element? }
  end
  make_doc_urls(docs)
  autolink(docs, ungrouped_docs)
  [docs, doc_coverage, @undocumented_tokens]
end

.process_undocumented_token(doc, declaration) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 177

def self.process_undocumented_token(doc, declaration)
  source_directory = Config.instance.source_directory.to_s
  filepath = doc['key.filepath']
  objc = Config.instance.objc_mode
  if filepath && (filepath.start_with?(source_directory) || objc)
    @undocumented_tokens << doc
  end
  return nil if !documented_child?(doc) && @skip_undocumented
  make_default_doc_info(declaration)
end

.reject_objc_enum_typedefs(docs) ⇒ Object 



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# File 'lib/jazzy/sourcekitten.rb', line 465

def self.reject_objc_enum_typedefs(docs)
  enums = docs.flat_map do |doc|
    doc.children.select { |child| child.type.objc_enum? }.map(&:name)
  end
  docs.map do |doc|
    doc.children = doc.children.reject do |child|
      child.type.objc_typedef? && enums.include?(child.name)
    end
    doc
  end
end

.run_sourcekitten(arguments) ⇒ Object

Run sourcekitten with given arguments and return STDOUT



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# File 'lib/jazzy/sourcekitten.rb', line 134

def self.run_sourcekitten(arguments)
  swift_version = Config.instance.swift_version
  unless xcode = XCInvoke::Xcode.find_swift_version(swift_version)
    raise "Unable to find an Xcode with swift version #{swift_version}."
  end
  bin_path = Pathname(__FILE__).parent + 'SourceKitten/bin/sourcekitten'
  output, = Executable.execute_command(bin_path, arguments, true,
                                       env: xcode.as_env)
  output
end

.should_document?(doc) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jazzy/sourcekitten.rb', line 159

def self.should_document?(doc)
  return false if doc['key.doc.comment'].to_s.include?(':nodoc:')

  # Always document Objective-C declarations.
  return true if Config.instance.objc_mode

  # Document extensions & enum elements, since we can't tell their ACL.
  type = SourceDeclaration::Type.new(doc['key.kind'])
  return true if type.swift_enum_element?
  if type.swift_extension?
    return Array(doc['key.substructure']).any? do |subdoc|
      should_document?(subdoc)
    end
  end

  SourceDeclaration::AccessControlLevel.from_doc(doc) >= @min_acl
end

.subdir_for_doc(doc) ⇒ Object

Determine the subdirectory in which a doc should be placed



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# File 'lib/jazzy/sourcekitten.rb', line 104

def self.subdir_for_doc(doc)
  # We always want to create top-level subdirs according to type (Struct,
  # Class, etc).
  top_level_decl = doc.namespace_path.first
  if top_level_decl && top_level_decl.type && top_level_decl.type.name
    # File program elements under top ancestor’s type (Struct, Class, etc.)
    [top_level_decl.type.plural_name] + doc.namespace_ancestors.map(&:name)
  else
    # Categories live in their own directory
    []
  end
end