Module: Homebrew::Manpages Private

Defined in:
manpages.rb,
manpages/parser/ronn.rb,
manpages/converter/roff.rb,
manpages/converter/kramdown.rb

Overview

This module is part of a private API. This module may only be used in the Homebrew/brew repository. Third parties should avoid using this module if possible, as it may be removed or changed without warning.

Helper functions for generating homebrew manual.

Defined Under Namespace

Modules: Converter, Parser Classes: Variables

Constant Summary collapse

SOURCE_PATH =

This constant is part of a private API. This constant may only be used in the Homebrew/brew repository. Third parties should avoid using this constant if possible, as it may be removed or changed without warning. 

T.let((HOMEBREW_LIBRARY_PATH/"manpages").freeze, Pathname)
TARGET_MAN_PATH =

This constant is part of a private API. This constant may only be used in the Homebrew/brew repository. Third parties should avoid using this constant if possible, as it may be removed or changed without warning. 

T.let((HOMEBREW_REPOSITORY/"manpages").freeze, Pathname)
TARGET_DOC_PATH =

This constant is part of a private API. This constant may only be used in the Homebrew/brew repository. Third parties should avoid using this constant if possible, as it may be removed or changed without warning. 

T.let((HOMEBREW_REPOSITORY/"docs").freeze, Pathname)

Class Method Summary collapse

Class Method Details

.build_man_page(quiet:) ⇒ String

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

  • quiet (Boolean)

Returns:



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# File 'manpages.rb', line 47

def self.build_man_page(quiet:)
  template = (SOURCE_PATH/"brew.1.md.erb").read
  readme = HOMEBREW_REPOSITORY/"README.md"
  variables = Variables.new(
    commands:              generate_cmd_manpages(Commands.internal_commands_paths),
    developer_commands:    generate_cmd_manpages(Commands.internal_developer_commands_paths),
    global_cask_options:   global_cask_options_manpage,
    global_options:        global_options_manpage,
    environment_variables: env_vars_manpage,
    project_leader:        readme.read[/(Homebrew's \[Project Leader.*\.)/, 1]
                                 .gsub(/\[([^\]]+)\]\([^)]+\)/, '\1'),
    lead_maintainers:      readme.read[/(Homebrew's \[Lead Maintainers.*\.)/, 1]
                                 .gsub(/\[([^\]]+)\]\([^)]+\)/, '\1'),
    maintainers:           readme.read[/(Homebrew's other Maintainers .*\.)/, 1]
                                 .gsub(/\[([^\]]+)\]\([^)]+\)/, '\1'),
    alumni:                readme.read[/(Former Maintainers .*\.)/, 1]
                                 .gsub(/\[([^\]]+)\]\([^)]+\)/, '\1'),
  )

  ERB.new(template, trim_mode: ">").result(variables.instance_eval { binding })
end

.cmd_comment_manpage_lines(cmd_path) ⇒ Array<String>?

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

Returns:



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# File 'manpages.rb', line 144

def self.cmd_comment_manpage_lines(cmd_path)
  comment_lines = cmd_path.read.lines.grep(/^#:/)
  return if comment_lines.empty?

  first_comment_line = comment_lines.first
  return unless first_comment_line
  return if first_comment_line.include?("@hide_from_man_page")

  lines = [format_usage_banner(first_comment_line).chomp]
  all_but_first_comment_lines = comment_lines.slice(1..-1)
  return unless all_but_first_comment_lines
  return if all_but_first_comment_lines.empty?

  all_but_first_comment_lines.each do |line|
    line = line.slice(4..-2)
    unless line
      lines.last << "\n"
      next
    end

    # Omit the common global_options documented separately in the man page.
    next if line.match?(/--(debug|help|quiet|verbose) /)

    # Format one option or a comma-separated pair of short and long options.
    line.gsub!(/^ +(-+[a-z-]+), (-+[a-z-]+) +(.*)$/, "`\\1`, `\\2`\n\n: \\3\n")
    line.gsub!(/^ +(-+[a-z-]+) +(.*)$/, "`\\1`\n\n: \\2\n")

    lines << line
  end
  lines.last << "\n"
  lines
end

.cmd_parser_manpage_lines(cmd_parser) ⇒ Array<String>

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

Returns:



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# File 'manpages.rb', line 99

def self.cmd_parser_manpage_lines(cmd_parser)
  lines = []
  if cmd_parser.subcommands.present?
    root_usage_banner_text = cmd_parser.root_usage_banner_text
    lines << "#{format_usage_banner(root_usage_banner_text)}\n\n" if root_usage_banner_text
    if (description = cmd_parser.description).present?
      lines << "#{description}\n\n"
    end

    root_options = cmd_parser.processed_options_for_root_command
    lines += option_manpage_lines(root_options)

    cmd_parser.subcommands.each do |subcommand|
      usage_banner = subcommand.usage_banner
      next if usage_banner.blank?

      lines << "#{format_usage_text(usage_banner)}\n\n"
      lines += option_manpage_lines(cmd_parser.processed_options_for_subcommand(subcommand.name) - root_options)
    end
  else
    usage_banner_text = cmd_parser.usage_banner_text
    lines << format_usage_banner(usage_banner_text) if usage_banner_text
    lines += option_manpage_lines(cmd_parser.processed_options)
  end
  lines
end

.env_vars_manpage ⇒ String

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Returns:



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# File 'manpages.rb', line 197

def self.env_vars_manpage
  lines = Homebrew::EnvConfig::ENVS.filter_map do |env, hash|
    next if hash[:hidden]

    entry = "`#{env}`\n\n: #{hash[:description]}\n"
    default = hash[:default_text]
    default ||= "`#{hash[:default]}`." if hash[:default]
    entry += "\n\n    *Default:* #{default}\n" if default

    entry
  end
  lines.join("\n")
end

.format_opt(opt) ⇒ String?

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

Returns:



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# File 'manpages.rb', line 212

def self.format_opt(opt)
  "`#{opt}`" unless opt.nil?
end

.format_usage_banner(usage_banner) ⇒ String

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

Returns:



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# File 'manpages.rb', line 238

def self.format_usage_banner(usage_banner)
  format_usage_text(usage_banner).sub(/^(#: *\* )?/, "### ")
end

.generate_cmd_manpages(cmd_paths) ⇒ String

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

Returns:



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# File 'manpages.rb', line 76

def self.generate_cmd_manpages(cmd_paths)
  man_page_lines = []

  # preserve existing manpage order
  cmd_paths.sort_by { sort_key_for_path(it) }
           .each do |cmd_path|
    cmd_man_page_lines = if (cmd_parser = Homebrew::CLI::Parser.from_cmd_path(cmd_path))
      next if cmd_parser.hide_from_man_page

      cmd_parser_manpage_lines(cmd_parser).join
    else
      cmd_comment_manpage_lines(cmd_path)&.join("\n")
    end
    # Convert subcommands to definition lists
    cmd_man_page_lines&.gsub!(/(?<=\n\n)([\\?\[`].+):\n/, "\\1\n\n: ")

    man_page_lines << cmd_man_page_lines
  end

  man_page_lines.compact.join("\n")
end

.generate_option_doc(short, long, desc) ⇒ String

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

Returns:



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# File 'manpages.rb', line 223

def self.generate_option_doc(short, long, desc)
  comma = if short && long
    ", "
  else
    ""
  end
  <<~EOS
    #{format_opt(short)}#{comma}#{format_opt(long)}

    : #{desc}

  EOS
end

.global_cask_options_manpage ⇒ String

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Returns:



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# File 'manpages.rb', line 178

def self.global_cask_options_manpage
  lines = ["These options are applicable to the `install`, `reinstall` and `upgrade` " \
           "subcommands with the `--cask` switch.\n"]
  lines += Homebrew::CLI::Parser.global_cask_options.map do |_, long, kwargs|
    generate_option_doc(nil, long.chomp("="), kwargs.fetch(:description))
  end
  lines.join("\n")
end

.global_options_manpage ⇒ String

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Returns:



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# File 'manpages.rb', line 188

def self.global_options_manpage
  lines = ["These options are applicable across multiple subcommands.\n"]
  lines += Homebrew::CLI::Parser.global_options.map do |short, long, desc|
    generate_option_doc(short, long, desc)
  end
  lines.join("\n")
end

.regenerate_man_pages(quiet:) ⇒ void

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

This method returns an undefined value.

Parameters:

  • quiet (Boolean) 


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# File 'manpages.rb', line 27

def self.regenerate_man_pages(quiet:)
  require "kramdown"
  require "manpages/parser/ronn"
  require "manpages/converter/kramdown"
  require "manpages/converter/roff"

  markup = build_man_page(quiet:)
  root, warnings = Parser::Ronn.parse(markup)
  $stderr.puts(warnings)

  roff, warnings = Converter::Kramdown.convert(root)
  $stderr.puts(warnings)
  File.write(TARGET_DOC_PATH/"Manpage.md", roff)

  roff, warnings = Converter::Roff.convert(root)
  $stderr.puts(warnings)
  File.write(TARGET_MAN_PATH/"brew.1", roff)
end

.sort_key_for_path(path) ⇒ String

This method is part of a private API. This method may only be used in the Homebrew/brew repository. Third parties should avoid using this method if possible, as it may be removed or changed without warning.

Parameters:

Returns:



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# File 'manpages.rb', line 70

def self.sort_key_for_path(path)
  # Options after regular commands (`~` comes after `z` in ASCII table).
  path.basename.to_s.sub(/\.(rb|sh)$/, "").sub(/^--/, "~~")
end