Module: Homebrew::Manpages Private

Defined in:
manpages.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

Classes: Variables

Class Method Summary collapse

Class Method Details

.build_man_page(quiet:) ⇒ Object

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. 



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# File 'manpages.rb', line 38

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),
    official_external_commands: generate_cmd_manpages(Commands.official_external_commands_paths(quiet: quiet)),
    global_cask_options:        global_cask_options_manpage,
    global_options:             global_options_manpage,
    environment_variables:      env_vars_manpage,
    lead:                       readme.read[/(Homebrew's \[Project Leader.*\.)/, 1]
                                  .gsub(/\[([^\]]+)\]\([^)]+\)/, '\1'),
    plc:                        readme.read[/(Homebrew's \[Project Leadership Committee.*\.)/, 1]
                                  .gsub(/\[([^\]]+)\]\([^)]+\)/, '\1'),
    tsc:                        readme.read[/(Homebrew's \[Technical Steering Committee.*\.)/, 1]
                                  .gsub(/\[([^\]]+)\]\([^)]+\)/, '\1'),
    maintainers:                readme.read[/(Homebrew's 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) ⇒ Object

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. 



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# File 'manpages.rb', line 158

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

  lines = [format_usage_banner(comment_lines.first).chomp]
  comment_lines.slice(1..-1)
               .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.
    lines << line.gsub(/^ +(-+[a-z-]+), (-+[a-z-]+) +/, "* `\\1`, `\\2`:\n  ")
                 .gsub(/^ +(-+[a-z-]+) +/, "* `\\1`:\n  ")
  end
  lines.last << "\n"
  lines
end

.cmd_parser_manpage_lines(cmd_parser) ⇒ Object

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. 



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# File 'manpages.rb', line 141

def self.cmd_parser_manpage_lines(cmd_parser)
  lines = [format_usage_banner(cmd_parser.usage_banner_text)]
  lines += cmd_parser.processed_options.map do |short, long, _, desc, hidden|
    next if hidden

    if long.present?
      next if Homebrew::CLI::Parser.global_options.include?([short, long, desc])
      next if Homebrew::CLI::Parser.global_cask_options.any? do |_, option, description:, **|
                [long, "#{long}="].include?(option) && description == desc
              end
    end

    generate_option_doc(short, long, desc)
  end.compact
  lines
end

.convert_man_page(markup, target) ⇒ Object

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. 



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# File 'manpages.rb', line 68

def self.convert_man_page(markup, target)
  manual = target.basename(".1")
  organisation = "Homebrew"

  # Set the manpage date to the existing one if we're updating.
  # This avoids the only change being e.g. a new date.
  date = if target.extname == ".1" && target.exist?
    /"(\d{1,2})" "([A-Z][a-z]+) (\d{4})" "#{organisation}" "#{manual}"/ =~ target.read
    Date.parse("#{Regexp.last_match(1)} #{Regexp.last_match(2)} #{Regexp.last_match(3)}")
  else
    Date.today
  end
  date = date.strftime("%Y-%m-%d")

  shared_args = %W[
    --pipe
    --organization=#{organisation}
    --manual=#{target.basename(".1")}
    --date=#{date}
  ]

  format_flag, format_desc = target_path_to_format(target)

  puts "Writing #{format_desc} to #{target}"
  Utils.popen(["ronn", format_flag] + shared_args, "rb+") do |ronn|
    ronn.write markup
    ronn.close_write
    ronn_output = ronn.read
    odie "Got no output from ronn!" if ronn_output.blank?
    ronn_output = case format_flag
    when "--markdown"
      ronn_output.gsub(%r{<var>(.*?)</var>}, "*`\\1`*")
                 .gsub(/\n\n\n+/, "\n\n")
                 .gsub(/^(- `[^`]+`):/, "\\1") # drop trailing colons from definition lists
                 .gsub(/(?<=\n\n)([\[`].+):\n/, "\\1\n<br>") # replace colons with <br> on subcommands
    when "--roff"
      ronn_output.gsub(%r{<code>(.*?)</code>}, "\\fB\\1\\fR")
                 .gsub(%r{<var>(.*?)</var>}, "\\fI\\1\\fR")
                 .gsub(/(^\[?\\fB.+): /, "\\1\n    ")
    end
    target.atomic_write ronn_output
  end
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 203

def self.env_vars_manpage
  lines = Homebrew::EnvConfig::ENVS.flat_map do |env, hash|
    entry = "- `#{env}`:\n  <br>#{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) ⇒ Object

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. 



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# File 'manpages.rb', line 215

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

.format_usage_banner(usage_banner) ⇒ Object

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. 



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# File 'manpages.rb', line 227

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

.generate_cmd_manpages(cmd_paths) ⇒ Object

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. 



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# File 'manpages.rb', line 121

def self.generate_cmd_manpages(cmd_paths)
  man_page_lines = []

  # preserve existing manpage order
  cmd_paths.sort_by(&method(:sort_key_for_path))
           .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)
    end

    man_page_lines << cmd_man_page_lines
  end

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

.generate_option_doc(short, long, desc) ⇒ Object

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. 



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# File 'manpages.rb', line 219

def self.generate_option_doc(short, long, desc)
  comma = (short && long) ? ", " : ""
  <<~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 184

def self.global_cask_options_manpage
  lines = ["These options are applicable to the `install`, `reinstall`, and `upgrade` " \
           "subcommands with the `--cask` flag.\n"]
  lines += Homebrew::CLI::Parser.global_cask_options.map do |_, long, description:, **|
    generate_option_doc(nil, long.chomp("="), 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 194

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:) ⇒ Object

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. 



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# File 'manpages.rb', line 30

def self.regenerate_man_pages(quiet:)
  Homebrew.install_bundler_gems!

  markup = build_man_page(quiet: quiet)
  convert_man_page(markup, TARGET_DOC_PATH/"Manpage.md")
  convert_man_page(markup, TARGET_MAN_PATH/"brew.1")
end

.sort_key_for_path(path) ⇒ Object

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. 



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# File 'manpages.rb', line 63

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

.target_path_to_format(target) ⇒ Object

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. 



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# File 'manpages.rb', line 112

def self.target_path_to_format(target)
  case target.basename
  when /\.md$/    then ["--markdown", "markdown"]
  when /\.\d$/    then ["--roff", "man page"]
  else
    odie "Failed to infer output format from '#{target.basename}'."
  end
end