Module: Homebrew::Completions Private

Defined in:
completions.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 shell completions.

Defined Under Namespace

Classes: Variables

Constant Summary collapse

COMPLETIONS_DIR =

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/"completions").freeze, Pathname)
TEMPLATE_DIR =

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/"completions").freeze, Pathname)
SHELLS =

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. 

%w[bash fish zsh].freeze
COMPLETIONS_EXCLUSION_LIST =

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. 

%w[
  instal
  uninstal
  update-report
].freeze
BASH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING =

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({
  formula:           "__brew_complete_formulae",
  installed_formula: "__brew_complete_installed_formulae",
  outdated_formula:  "__brew_complete_outdated_formulae",
  cask:              "__brew_complete_casks",
  installed_cask:    "__brew_complete_installed_casks",
  outdated_cask:     "__brew_complete_outdated_casks",
  tap:               "__brew_complete_tapped",
  installed_tap:     "__brew_complete_tapped",
  command:           "__brew_complete_commands",
  diagnostic_check:  '__brewcomp "${__HOMEBREW_DOCTOR_CHECKS=$(brew doctor --list-checks)}"',
  file:              "__brew_complete_files",
}.freeze, T::Hash[Symbol, String])
ZSH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING =

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({
  formula:           "__brew_formulae",
  installed_formula: "__brew_installed_formulae",
  outdated_formula:  "__brew_outdated_formulae",
  cask:              "__brew_casks",
  installed_cask:    "__brew_installed_casks",
  outdated_cask:     "__brew_outdated_casks",
  tap:               "__brew_any_tap",
  installed_tap:     "__brew_installed_taps",
  command:           "__brew_commands",
  diagnostic_check:  "__brew_diagnostic_checks",
  file:              "__brew_formulae_or_ruby_files",
}.freeze, T::Hash[Symbol, String])
FISH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING =

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({
  formula:           "__fish_brew_suggest_formulae_all",
  installed_formula: "__fish_brew_suggest_formulae_installed",
  outdated_formula:  "__fish_brew_suggest_formulae_outdated",
  cask:              "__fish_brew_suggest_casks_all",
  installed_cask:    "__fish_brew_suggest_casks_installed",
  outdated_cask:     "__fish_brew_suggest_casks_outdated",
  tap:               "__fish_brew_suggest_taps_installed",
  installed_tap:     "__fish_brew_suggest_taps_installed",
  command:           "__fish_brew_suggest_commands",
  diagnostic_check:  "__fish_brew_suggest_diagnostic_checks",
}.freeze, T::Hash[Symbol, String])

Class Method Summary collapse

Class Method Details

.command_gets_completions?(command) ⇒ Boolean

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:

  • (Boolean) 


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# File 'completions.rb', line 133

def self.command_gets_completions?(command)
  command_options(command).any?
end

.command_options(command) ⇒ Hash{String => 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 'completions.rb', line 148

def self.command_options(command)
  options = {}
  Commands.command_options(command)&.each do |option|
    next if option.blank?

    name = option.first
    desc = option.second
    if name.start_with? "--[no-]"
      options[name.gsub("[no-]", "")] = desc
      options[name.sub("[no-]", "no-")] = desc
    else
      options[name] = desc
    end
  end
  options
end

.completions_to_link? ⇒ Boolean

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:

  • (Boolean) 


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# File 'completions.rb', line 94

def self.completions_to_link?
  Tap.installed.each do |tap|
    next if tap.official?

    SHELLS.each do |shell|
      return true if (tap.path/"completions/#{shell}").exist?
    end
  end

  false
end

.format_description(description, fish: false) ⇒ 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:

  • description (String)
  • fish (Boolean) (defaults to: false)

Returns:



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# File 'completions.rb', line 138

def self.format_description(description, fish: false)
  description = if fish
    description.gsub("'", "\\\\'")
  else
    description.gsub("'", "'\\\\''")
  end
  description.gsub(/[<>]/, "").tr("\n", " ").chomp(".")
end

.generate_bash_completion_file(commands) ⇒ 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 'completions.rb', line 199

def self.generate_bash_completion_file(commands)
  variables = Variables.new(
    completion_functions: commands.filter_map do |command|
      generate_bash_subcommand_completion command
    end,
    function_mappings:    commands.filter_map do |command|
      next unless command_gets_completions? command

      "#{command}) _brew_#{Commands.method_name command} ;;"
    end,
  )

  ERB.new((TEMPLATE_DIR/"bash.erb").read, trim_mode: ">").result(variables.instance_eval { binding })
end

.generate_bash_subcommand_completion(command) ⇒ 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 'completions.rb', line 166

def self.generate_bash_subcommand_completion(command)
  return unless command_gets_completions? command

  named_completion_string = ""
  if (types = Commands.named_args_type(command))
    named_args_strings, named_args_types = types.partition { |type| type.is_a? String }

    named_args_types.each do |type|
      next unless BASH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING.key? type

      named_completion_string += "\n  #{BASH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING[type]}"
    end

    named_completion_string += "\n  __brewcomp \"#{named_args_strings.join(" ")}\"" if named_args_strings.any?
  end

  <<~COMPLETION
    _brew_#{Commands.method_name command}() {
      local cur="${COMP_WORDS[COMP_CWORD]}"
      case "${cur}" in
        -*)
          __brewcomp "
          #{command_options(command).keys.sort.join("\n      ")}
          "
          return
          ;;
        *) ;;
      esac#{named_completion_string}
    }
  COMPLETION
end

.generate_fish_completion_file(commands) ⇒ 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 'completions.rb', line 354

def self.generate_fish_completion_file(commands)
  variables = Variables.new(
    completion_functions: commands.filter_map do |command|
      generate_fish_subcommand_completion command
    end,
  )

  ERB.new((TEMPLATE_DIR/"fish.erb").read, trim_mode: ">").result(variables.instance_eval { binding })
end

.generate_fish_subcommand_completion(command) ⇒ 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 'completions.rb', line 303

def self.generate_fish_subcommand_completion(command)
  return unless command_gets_completions? command

  command_description = format_description Commands.command_description(command, short: true), fish: true
  lines = if COMPLETIONS_EXCLUSION_LIST.include?(command)
    []
  else
    ["__fish_brew_complete_cmd '#{command}' '#{command_description}'"]
  end

  options = command_options(command).sort.filter_map do |opt, desc|
    arg_line = "__fish_brew_complete_arg '#{command}' -l #{opt.sub(/^-+/, "")}"
    arg_line += " -d '#{format_description desc, fish: true}'" if desc.present?
    arg_line
  end

  subcommands = []
  named_args = []
  if (types = Commands.named_args_type(command))
    named_args_strings, named_args_types = types.partition { |type| type.is_a? String }

    named_args_types.each do |type|
      next unless FISH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING.key? type

      named_arg_function = FISH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING[type]
      named_arg_prefix = "__fish_brew_complete_arg '#{command}; and not __fish_seen_argument"

      formula_option = command_options(command).key?("--formula")
      cask_option = command_options(command).key?("--cask")

      named_args << if formula_option && cask_option && type.to_s.end_with?("formula")
        "#{named_arg_prefix} -l cask -l casks' -a '(#{named_arg_function})'"
      elsif formula_option && cask_option && type.to_s.end_with?("cask")
        "#{named_arg_prefix} -l formula -l formulae' -a '(#{named_arg_function})'"
      else
        "__fish_brew_complete_arg '#{command}' -a '(#{named_arg_function})'"
      end
    end

    named_args_strings.each do |subcommand|
      subcommands << "__fish_brew_complete_sub_cmd '#{command}' '#{subcommand}'"
    end
  end

  lines += subcommands + options + named_args
  <<~COMPLETION
    #{lines.join("\n").chomp}
  COMPLETION
end

.generate_zsh_completion_file(commands) ⇒ 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 'completions.rb', line 276

def self.generate_zsh_completion_file(commands)
  variables = Variables.new(
    aliases:                      Commands::HOMEBREW_INTERNAL_COMMAND_ALIASES.filter_map do |alias_cmd, command|
      alias_cmd = "'#{alias_cmd}'" if alias_cmd.start_with? "-"
      command = "'#{command}'" if command.start_with? "-"
      "#{alias_cmd} #{command}"
    end,

    builtin_command_descriptions: commands.filter_map do |command|
      next if Commands::HOMEBREW_INTERNAL_COMMAND_ALIASES.key? command

      description = Commands.command_description(command, short: true)
      next if description.blank?

      description = format_description description
      "'#{command}:#{description}'"
    end,

    completion_functions:         commands.filter_map do |command|
      generate_zsh_subcommand_completion command
    end,
  )

  ERB.new((TEMPLATE_DIR/"zsh.erb").read, trim_mode: ">").result(variables.instance_eval { binding })
end

.generate_zsh_option_exclusions(command, option) ⇒ 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 'completions.rb', line 268

def self.generate_zsh_option_exclusions(command, option)
  conflicts = Commands.option_conflicts(command, option.gsub(/^--?/, ""))
  return "" unless conflicts.presence

  "(#{conflicts.map { |conflict| "-#{"-" if conflict.size > 1}#{conflict}" }.join(" ")})"
end

.generate_zsh_subcommand_completion(command) ⇒ 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 'completions.rb', line 215

def self.generate_zsh_subcommand_completion(command)
  return unless command_gets_completions? command

  options = command_options(command)

  args_options = []
  if (types = Commands.named_args_type(command))
    named_args_strings, named_args_types = types.partition { |type| type.is_a? String }

    named_args_types.each do |type|
      next unless ZSH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING.key? type

      args_options << "- #{type}"
      opt = "--#{type.to_s.gsub(/(installed|outdated)_/, "")}"
      if options.key?(opt)
        desc = options[opt]

        if desc.blank?
          args_options << opt
        else
          conflicts = generate_zsh_option_exclusions(command, opt)
          args_options << "#{conflicts}#{opt}[#{format_description desc}]"
        end

        options.delete(opt)
      end
      args_options << "*::#{type}:#{ZSH_NAMED_ARGS_COMPLETION_FUNCTION_MAPPING[type]}"
    end

    if named_args_strings.any?
      args_options << "- subcommand"
      args_options << "*::subcommand:(#{named_args_strings.join(" ")})"
    end
  end

  options = options.sort.map do |opt, desc|
    next opt if desc.blank?

    conflicts = generate_zsh_option_exclusions(command, opt)
    "#{conflicts}#{opt}[#{format_description desc}]"
  end
  options += args_options

  <<~COMPLETION
    # brew #{command}
    _brew_#{Commands.method_name command}() {
      _arguments \\
        #{options.map! { |opt| opt.start_with?("- ") ? opt : "'#{opt}'" }.join(" \\\n    ")}
    }
  COMPLETION
end

.link! ⇒ 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.



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# File 'completions.rb', line 71

def self.link!
  Settings.write :linkcompletions, true
  Tap.installed.each do |tap|
    Utils::Link.link_completions tap.path, "brew completions link"
  end
end

.link_completions? ⇒ Boolean

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:

  • (Boolean) 


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# File 'completions.rb', line 89

def self.link_completions?
  Settings.read(:linkcompletions) == "true"
end

.show_completions_message_if_needed ⇒ 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.



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# File 'completions.rb', line 107

def self.show_completions_message_if_needed
  return if Settings.read(:completionsmessageshown) == "true"
  return unless completions_to_link?

  ohai "Homebrew completions for external commands are unlinked by default!"
  puts <<~EOS
    To opt-in to automatically linking external tap shell completion files, run:
      brew completions link
    Then, follow the directions at #{Formatter.url("https://docs.brew.sh/Shell-Completion")}
  EOS

  Settings.write :completionsmessageshown, true
end

.unlink! ⇒ 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.



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# File 'completions.rb', line 79

def self.unlink!
  Settings.write :linkcompletions, false
  Tap.installed.each do |tap|
    next if tap.official?

    Utils::Link.unlink_completions tap.path
  end
end

.update_shell_completions! ⇒ 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.



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# File 'completions.rb', line 122

def self.update_shell_completions!
  commands = Commands.commands(external: false, aliases: true).sort

  puts "Writing completions to #{COMPLETIONS_DIR}"

  (COMPLETIONS_DIR/"bash/brew").atomic_write generate_bash_completion_file(commands)
  (COMPLETIONS_DIR/"zsh/_brew").atomic_write generate_zsh_completion_file(commands)
  (COMPLETIONS_DIR/"fish/brew.fish").atomic_write generate_fish_completion_file(commands)
end