Module: Utils Private

Defined in:
utils.rb,
utils/ast.rb,
utils/git.rb,
utils/svn.rb,
utils/tar.rb,
utils/uid.rb,
utils/curl.rb,
utils/fork.rb,
utils/gzip.rb,
utils/link.rb,
utils/path.rb,
utils/clang.rb,
utils/popen.rb,
utils/shell.rb,
utils/timer.rb,
utils/output.rb,
utils/socket.rb,
utils/bottles.rb,
utils/linkage.rb,
utils/service.rb,
utils/shebang.rb,
utils/analytics.rb,
utils/backtrace.rb,
utils/inreplace.rb,
utils/autoremove.rb,
utils/attestation.rb,
utils/portable_ruby.rb,
utils/git_repository.rb,
utils/shell_completion.rb,
utils/topological_hash.rb,
utils/ast.rbi

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.

Defined Under Namespace

Modules: AST, Analytics, Attestation, Backtrace, Bottles, Clang, Curl, CycleTolerantTSort, Git, Gzip, Inreplace, Link, Output, Path, PortableRuby, Service, Shebang, Shell, ShellCompletion, Svn, Tar, Timer, UID, UNIXSocketExt Classes: TopologicalHash, UNIXServerExt

Class Method Summary collapse

Class Method Details

.binary_linked_to_library?(binary, library) ⇒ Boolean

This method is part of an internal API. This method may only be used internally in repositories owned by Homebrew, except in casks or formulae. 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 'utils/linkage.rb', line 9

def self.binary_linked_to_library?(binary, library)
  library = library.to_s
  library = File.realpath(library) if library.start_with?(HOMEBREW_PREFIX.to_s)

  binary_path = BinaryPathname.wrap(binary)
  binary_path.dynamically_linked_libraries.any? do |dll|
    dll = File.realpath(dll) if dll.start_with?(HOMEBREW_PREFIX.to_s)
    dll == library
  end
end

.child_error_hash(error) ⇒ Hash{String => T.untyped}

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:

  • error (Exception)

Returns:



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# File 'utils/fork.rb', line 16

def self.child_error_hash(error)
  require "json/add/exception"

  error_hash = T.cast(JSON.parse(error.to_json), T::Hash[String, T.untyped])
  case error
  when BuildError
    error_hash["cmd"] = error.cmd
    error_hash["args"] = error.args
    error_hash["env"] = error.env
  when ErrorDuringExecution
    error_hash["cmd"] = error.cmd
    error_hash["status"] = if error.status.is_a?(Process::Status)
      {
        exitstatus: error.exitstatus,
        termsig:    error.termsig,
      }
    else
      error.status
    end
    error_hash["output"] = error.output
  end
  error_hash
end

.convert_to_string_or_symbol(string) ⇒ String, Symbol

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.

Converts a string starting with : to a symbol, otherwise returns the string itself.

convert_to_string_or_symbol(":example") # => :example
convert_to_string_or_symbol("example")  # => "example"

Parameters:

Returns:



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# File 'utils.rb', line 177

def self.convert_to_string_or_symbol(string)
  return T.must(string[1..]).to_sym if string.start_with?(":")

  string
end

.deconstantize(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.

Removes the rightmost segment from the constant expression in the string.

deconstantize('Net::HTTP')   # => "Net"
deconstantize('::Net::HTTP') # => "::Net"
deconstantize('String')      # => ""
deconstantize('::String')    # => ""
deconstantize('')            # => ""

See also #demodulize.

Parameters:

Returns:

See Also:



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# File 'utils.rb', line 17

def self.deconstantize(path)
  T.must(path[0, path.rindex("::") || 0]) # implementation based on the one in facets' Module#spacename
end

.deep_compact_blank(obj, compact_zero: true, compact_false: true) ⇒ T.type_parameter(:U)?

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:

  • obj (T.all(T.type_parameter(:U), Object))
  • compact_zero (Boolean) (defaults to: true)
  • compact_false (Boolean) (defaults to: true)

Returns:

  • (T.type_parameter(:U), nil) 


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# File 'utils.rb', line 231

def self.deep_compact_blank(obj, compact_zero: true, compact_false: true)
  obj = case obj
  when Hash
    obj.transform_values { |v| deep_compact_blank(v, compact_zero:, compact_false:) }
       .compact
  when Array
    obj.each_with_object([]) do |v, compacted|
      value = deep_compact_blank(v, compact_zero:, compact_false:)
      compacted << value unless value.nil?
    end
  else
    obj
  end

  return if (compact_false || obj != false) &&
            (obj.blank? || (compact_zero && obj.is_a?(Numeric) && obj.zero?))

  obj
end

.deep_stringify_symbols(obj) ⇒ T.untyped

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:

  • obj (T.untyped)

Returns:

  • (T.untyped) 


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# File 'utils.rb', line 184

def self.deep_stringify_symbols(obj)
  case obj
  when String
    # Escape leading : or \ to avoid confusion with stringified symbols
    # ":foo" -> "\:foo"
    # "\foo" -> "\\foo"
    if obj.start_with?(":", "\\")
      "\\#{obj}"
    else
      obj
    end
  when Symbol
    ":#{obj}"
  when Hash
    obj.to_h { |k, v| [deep_stringify_symbols(k), deep_stringify_symbols(v)] }
  when Array
    obj.map { |v| deep_stringify_symbols(v) }
  else
    obj
  end
end

.deep_unstringify_symbols(obj) ⇒ T.untyped

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:

  • obj (T.untyped)

Returns:

  • (T.untyped) 


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# File 'utils.rb', line 207

def self.deep_unstringify_symbols(obj)
  case obj
  when String
    if obj.start_with?("\\")
      obj[1..]
    elsif obj.start_with?(":")
      T.must(obj[1..]).to_sym
    else
      obj
    end
  when Hash
    obj.to_h { |k, v| [deep_unstringify_symbols(k), deep_unstringify_symbols(v)] }
  when Array
    obj.map { |v| deep_unstringify_symbols(v) }
  else
    obj
  end
end

.demodulize(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.

Removes the module part from the expression in the string.

demodulize('ActiveSupport::Inflector::Inflections') # => "Inflections"
demodulize('Inflections')                           # => "Inflections"
demodulize('::Inflections')                         # => "Inflections"
demodulize('')                                      # => ""

See also #deconstantize.

Parameters:

Returns:

Raises:

  • (ArgumentError) —

    if the provided path is nil

See Also:



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# File 'utils.rb', line 33

def self.demodulize(path)
  raise ArgumentError, "No constant path provided" if path.nil?

  if (i = path.rindex("::"))
    T.must(path[(i + 2)..])
  else
    path
  end
end

.exponential_backoff_sleep(try, base: 2, &_blk) {|wait| ... } ⇒ 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.

Sleeps for an exponentially increasing wait (base ** try seconds), yielding the wait time first so callers can print a message before sleeping.

Parameters:

Yields:

  • (wait) 


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# File 'utils.rb', line 118

def self.exponential_backoff_sleep(try, base: 2, &_blk)
  wait = base.pow(try)
  yield wait if block_given?
  sleep wait
end

.forked_child_error_pipe ⇒ IO

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:

  • (IO) 


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# File 'utils/fork.rb', line 9

def self.forked_child_error_pipe
  UNIXSocketExt.open(ENV.fetch("HOMEBREW_ERROR_PIPE"), &:recv_io).tap do |error_pipe|
    error_pipe.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
  end
end

.full_name?(full_name) ⇒ 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.

Whether full_name is fully-qualified with a tap prefix, e.g. user/tap/name.

Parameters:

Returns:

  • (Boolean) 


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# File 'utils.rb', line 65

def self.full_name?(full_name)
  full_name.count("/") == 2
end

.git_branch(repo = Pathname.pwd, safe: true) ⇒ 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.

Gets the name of the currently checked-out branch, or HEAD if the repository is in a detached HEAD state.

Parameters:

  • repo (String, Pathname) (defaults to: Pathname.pwd)
  • safe (Boolean) (defaults to: true)

Returns:



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# File 'utils/git_repository.rb', line 38

def self.git_branch(repo = Pathname.pwd, safe: true)
  GitRepository.new(Pathname(repo)).branch_name(safe:)
end

.git_head(repo = Pathname.pwd, length: nil, safe: true) ⇒ 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.

Gets the full commit hash of the HEAD commit.

Parameters:

  • repo (String, Pathname) (defaults to: Pathname.pwd)
  • length (Integer, nil) (defaults to: nil)
  • safe (Boolean) (defaults to: true)

Returns:



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# File 'utils/git_repository.rb', line 13

def self.git_head(repo = Pathname.pwd, length: nil, safe: true)
  return git_short_head(repo, length:) if length

  GitRepository.new(Pathname(repo)).head_ref(safe:)
end

.git_short_head(repo = Pathname.pwd, length: nil, safe: true) ⇒ 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.

Gets a short commit hash of the HEAD commit.

Parameters:

  • repo (String, Pathname) (defaults to: Pathname.pwd)
  • length (Integer, nil) (defaults to: nil)
  • safe (Boolean) (defaults to: true)

Returns:



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# File 'utils/git_repository.rb', line 27

def self.git_short_head(repo = Pathname.pwd, length: nil, safe: true)
  GitRepository.new(Pathname(repo)).short_head_ref(length:, safe:)
end

.name_from_full_name(full_name) ⇒ 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 'utils.rb', line 44

def self.name_from_full_name(full_name)
  _, _, name = full_name.split("/", 3)

  name || full_name
end

.name_or_token(formula_or_cask) ⇒ 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 'utils.rb', line 51

def self.name_or_token(formula_or_cask)
  formula_or_cask.is_a?(Cask::Cask) ? formula_or_cask.token : formula_or_cask.name
end

.parallel_map(items, &block) ⇒ Array<T.type_parameter(:Result)>

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.

Maps items to block results with one thread per item, so that blocking waits (subprocesses, network requests) overlap instead of accumulating serially. Results keep the order of items. If multiple blocks raise, the exception re-raised by Thread#value is the earliest in items order (not necessarily the chronologically first failure) and other blocks may still run to completion. Only worthwhile when each block spends its time waiting: the GVL serializes Ruby execution.

Parameters:

  • items (Enumerable<T.type_parameter(:Item)>)
  • block (T.proc.params(item: T.type_parameter(:Item)).returns(T.type_parameter(:Result)))

Returns:

  • (Array<T.type_parameter(:Result)>) 


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# File 'utils.rb', line 83

def self.parallel_map(items, &block)
  threads = items.map do |item|
    Thread.new do
      # The exception is re-raised by `Thread#value`; don't also report it.
      Thread.current.report_on_exception = false
      yield(item)
    end
  end
  threads.map { |thread| T.cast(thread.value, T.type_parameter(:Result)) }
end

.parse_author!(author) ⇒ Hash

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:

Raises:



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# File 'utils.rb', line 125

def self.parse_author!(author)
  match_data = /^(?<name>[^<]+?)[ \t]*<(?<email>[^>]+?)>$/.match(author)
  if match_data
    name = match_data[:name]
    email = match_data[:email]
  end
  raise UsageError, "Unable to parse name and email." if name.blank? && email.blank?

  { name: T.must(name), email: T.must(email) }
end

.pluralize(stem, count, plural: "s", singular: "", include_count: 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.

A lightweight alternative to ActiveSupport::Inflector.pluralize: Combines stem with the singular or plural suffix based on count. Adds a prefix of the count value if include_count is set to true.

Parameters:

  • stem (String)
  • count (Integer)
  • plural (String) (defaults to: "s")
  • singular (String) (defaults to: "")
  • include_count (Boolean) (defaults to: false)

Returns:



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# File 'utils.rb', line 100

def self.pluralize(stem, count, plural: "s", singular: "", include_count: false)
  case stem
  when "formula"
    plural = "e"
  when "dependency", "try"
    stem = stem.delete_suffix("y")
    plural = "ies"
    singular = "y"
  end

  prefix = include_count ? "#{count} " : ""
  suffix = (count == 1) ? singular : plural
  "#{prefix}#{stem}#{suffix}"
end

.popen(args, mode, options = {}, &_block) ⇒ T.type_parameter(:U), 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 'utils/popen.rb', line 88

def self.popen(args, mode, options = {}, &_block)
  # `brew prof --vernier` uses this to avoid inheriting Vernier's active
  # native collector state through `IO.popen("-")` fork paths.
  if ENV["HOMEBREW_SPAWN_SYSTEM"] == "1"
    options[:err] ||= File::NULL unless ENV["HOMEBREW_STDERR"]
    IO.popen(args, mode, options) do |pipe|
      return pipe.read unless block_given?

      return yield pipe
    end
  end

  IO.popen("-", mode) do |pipe|
    if pipe
      return pipe.read unless block_given?

      yield pipe
    else
      options[:err] ||= File::NULL unless ENV["HOMEBREW_STDERR"]
      cmd = if args[0].is_a? Hash
        args[1]
      else
        args[0]
      end
      begin
        exec(*args, options)
      rescue Errno::ENOENT
        $stderr.puts "brew: command not found: #{cmd}" if options[:err] != :close
        exit! 127
      rescue SystemCallError => e
        if options[:err] != :close
          require "utils"
          $stderr.puts "brew: exec failed (#{Utils.demodulize(e.class.name)}): #{cmd}"
        end
        exit! 1
      end
    end
  end
end

.popen_read(*args, safe: false, **options, &block) ⇒ T.type_parameter(:U), 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:

Raises:



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# File 'utils/popen.rb', line 17

def self.popen_read(*args, safe: false, **options, &block)
  output = popen(args, "rb", options, &block)
  return output if !safe || $CHILD_STATUS.success?

  raise ErrorDuringExecution.new(args, status: $CHILD_STATUS, output: [[:stdout, T.cast(output, String)]])
end

.popen_write(*args, safe: false, **options, &_block) ⇒ 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:

Raises:



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# File 'utils/popen.rb', line 44

def self.popen_write(*args, safe: false, **options, &_block)
  output = ""
  popen(args, "w+b", options) do |pipe|
    # Before we yield to the block, capture as much output as we can
    loop do
      output += pipe.read_nonblock(IO_DEFAULT_BUFFER_SIZE)
    rescue IO::WaitReadable, EOFError
      break
    end

    yield pipe
    pipe.close_write
    pipe.wait_readable

    # Capture the rest of the output
    output += pipe.read
    output.freeze
  end
  return output if !safe || $CHILD_STATUS.success?

  raise ErrorDuringExecution.new(args, status: $CHILD_STATUS, output: [[:stdout, output]])
end

.report_forked_child_error(error_pipe, error) ⇒ 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:

  • error_pipe (IO, nil)
  • error (Exception) 


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# File 'utils/fork.rb', line 41

def self.report_forked_child_error(error_pipe, error)
  error_pipe&.puts child_error_hash(error).to_json
  error_pipe&.close
end

.rewrite_child_error(child_error) ⇒ Exception

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:

  • (Exception) 


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# File 'utils/fork.rb', line 47

def self.rewrite_child_error(child_error)
  # The error class name comes from the forked child's serialised JSON.
  # rubocop:disable Sorbet/ConstantsFromStrings
  inner_class = Object.const_get(child_error["json_class"])
  # rubocop:enable Sorbet/ConstantsFromStrings
  error = if child_error["cmd"] && inner_class == ErrorDuringExecution
    ErrorDuringExecution.new(child_error["cmd"],
                             status: child_error["status"],
                             output: child_error["output"])
  elsif child_error["cmd"] && inner_class == BuildError
    # We fill `BuildError#formula` and `BuildError#options` in later,
    # when we rescue this in `FormulaInstaller#build`.
    BuildError.new(nil, child_error["cmd"], child_error["args"], child_error["env"])
  elsif inner_class == Interrupt
    Interrupt.new
  else
    # Everything other error in the child just becomes a RuntimeError.
    RuntimeError.new <<~EOS
      An exception occurred within a child process:
        #{inner_class}: #{child_error["m"]}
    EOS
  end

  error.set_backtrace child_error["b"]

  error
end

.safe_filename(basename) ⇒ 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 'utils.rb', line 167

def self.safe_filename(basename)
  basename.gsub(SAFE_FILENAME_REGEX, "")
end

.safe_filename?(basename) ⇒ 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 'utils.rb', line 162

def self.safe_filename?(basename)
  !SAFE_FILENAME_REGEX.match?(basename)
end

.safe_fork(directory: nil, yield_parent: false, &_blk) ⇒ 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.

When using this function, remember to call exec as soon as reasonably possible. This function does not protect against the pitfalls of what you can do pre-exec in a fork. See man fork for more information.

Parameters:

  • directory (String, nil) (defaults to: nil)
  • yield_parent (Boolean) (defaults to: false)
  • _blk (T.proc.params(arg0: T.nilable(String)).void) 


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# File 'utils/fork.rb', line 82

def self.safe_fork(directory: nil, yield_parent: false, &_blk)
  block = proc do |tmpdir|
    UNIXServerExt.open("#{tmpdir}/socket") do |server|
      read, write = IO.pipe

      pid = fork do
        # bootsnap doesn't like these forked processes
        ENV["HOMEBREW_NO_BOOTSNAP"] = "1"
        error_pipe = server.path
        ENV["HOMEBREW_ERROR_PIPE"] = error_pipe
        server.close
        read.close
        write.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)

        Process::UID.change_privilege(Process.euid) if Process.euid != Process.uid

        yield(error_pipe)
      # This could be any type of exception, so rescue them all.
      rescue Exception => e # rubocop:disable Lint/RescueException
        report_forked_child_error(write, e)

        exit!
      else
        exit!(true)
      end

      begin
        yield(nil) if yield_parent

        begin
          socket = server.accept_nonblock
        rescue Errno::EAGAIN, Errno::EWOULDBLOCK, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR
          retry unless Process.waitpid(pid, Process::WNOHANG)
        else
          socket.send_io(write)
          socket.close
        end
        write.close
        data = read.read
        read.close
        Process.waitpid(pid) unless socket.nil?
      rescue Interrupt
        Process.waitpid(pid)
      end

      # 130 is the exit status for a process interrupted via Ctrl-C.
      raise Interrupt if $CHILD_STATUS.exitstatus == 130
      raise Interrupt if $CHILD_STATUS.termsig == Signal.list["INT"]

      if data.present?
        error_hash = JSON.parse(data.lines.fetch(0))
        raise rewrite_child_error(error_hash)
      end

      raise ChildProcessError, $CHILD_STATUS unless $CHILD_STATUS.success?
    end
  end

  if directory
    block.call(directory)
  else
    Dir.mktmpdir("homebrew-fork", HOMEBREW_TEMP, &block)
  end
end

.safe_popen_read(*args, **options, &block) ⇒ T.type_parameter(:U), 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 'utils/popen.rb', line 32

def self.safe_popen_read(*args, **options, &block)
  popen_read(*args, safe: true, **options, &block)
end

.safe_popen_write(*args, **options, &block) ⇒ T.type_parameter(:U)

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:

  • (T.type_parameter(:U)) 


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# File 'utils/popen.rb', line 75

def self.safe_popen_write(*args, **options, &block)
  popen_write(*args, safe: true, **options, &block)
end

.tap_from_full_name(full_name) ⇒ 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 'utils.rb', line 56

def self.tap_from_full_name(full_name)
  user, repository, name = full_name.split("/", 3)
  return unless name

  "#{user}/#{repository}"
end

.underscore(camel_cased_word) ⇒ 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.

Makes an underscored, lowercase form from the expression in the string.

Changes '::' to '/' to convert namespaces to paths.

underscore('ActiveModel')         # => "active_model"
underscore('ActiveModel::Errors') # => "active_model/errors"

Parameters:

Returns:

See Also:



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# File 'utils.rb', line 146

def self.underscore(camel_cased_word)
  return camel_cased_word.to_s unless /[A-Z-]|::/.match?(camel_cased_word)

  word = camel_cased_word.to_s.gsub("::", "/")
  word.gsub!(/([A-Z])(?=[A-Z][a-z])|([a-z\d])(?=[A-Z])/) do
    T.must(::Regexp.last_match(1) || ::Regexp.last_match(2)) << "_"
  end
  word.tr!("-", "_")
  word.downcase!
  word
end