Module: Kernel

Defined in:
extend/kernel.rb,
extend/ENV.rb

Overview

Contains shorthand Homebrew utility methods like ohai, opoo, odisabled.

Instance Method Summary collapse

Instance Method Details

#disk_usage_readable(size_in_bytes) ⇒ Object 



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# File 'extend/kernel.rb', line 419

def disk_usage_readable(size_in_bytes)
  if size_in_bytes >= 1_073_741_824
    size = size_in_bytes.to_f / 1_073_741_824
    unit = "GB"
  elsif size_in_bytes >= 1_048_576
    size = size_in_bytes.to_f / 1_048_576
    unit = "MB"
  elsif size_in_bytes >= 1_024
    size = size_in_bytes.to_f / 1_024
    unit = "KB"
  else
    size = size_in_bytes
    unit = "B"
  end

  # avoid trailing zero after decimal point
  if ((size * 10).to_i % 10).zero?
    "#{size.to_i}#{unit}"
  else
    "#{format("%<size>.1f", size: size)}#{unit}"
  end
end

#ensure_executable!(name, formula_name = nil, reason: "") ⇒ Object

Ensure the given executable is exist otherwise install the brewed version



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# File 'extend/kernel.rb', line 402

def ensure_executable!(name, formula_name = nil, reason: "")
  formula_name ||= name

  executable = [
    which(name),
    which(name, ORIGINAL_PATHS),
    HOMEBREW_PREFIX/"bin/#{name}",
  ].compact.first
  return executable if executable.exist?

  ensure_formula_installed!(formula_name, reason: reason).opt_bin/name
end

#ensure_formula_installed!(formula_or_name, reason: "", latest: false, output_to_stderr: true, quiet: false) ⇒ Object

Ensure the given formula is installed This is useful for installing a utility formula (e.g. shellcheck for brew style)



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# File 'extend/kernel.rb', line 363

def ensure_formula_installed!(formula_or_name, reason: "", latest: false,
                              output_to_stderr: true, quiet: false)
  if output_to_stderr || quiet
    file = if quiet
      File::NULL
    else
      $stderr
    end
    # Call this method itself with redirected stdout
    redirect_stdout(file) do
      return ensure_formula_installed!(formula_or_name, latest: latest,
                                       reason: reason, output_to_stderr: false)
    end
  end

  require "formula"

  formula = if formula_or_name.is_a?(Formula)
    formula_or_name
  else
    Formula[formula_or_name]
  end

  reason = " for #{reason}" if reason.present?

  unless formula.any_version_installed?
    ohai "Installing `#{formula.name}`#{reason}..."
    safe_system HOMEBREW_BREW_FILE, "install", "--formula", formula.full_name
  end

  if latest && !formula.latest_version_installed?
    ohai "Upgrading `#{formula.name}`#{reason}..."
    safe_system HOMEBREW_BREW_FILE, "upgrade", "--formula", formula.full_name
  end

  formula
end

#exec_browser(*args) ⇒ Object 



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# File 'extend/kernel.rb', line 308

def exec_browser(*args)
  browser = Homebrew::EnvConfig.browser
  browser ||= OS::PATH_OPEN if defined?(OS::PATH_OPEN)
  return unless browser

  ENV["DISPLAY"] = Homebrew::EnvConfig.display

  with_env(DBUS_SESSION_BUS_ADDRESS: ENV.fetch("HOMEBREW_DBUS_SESSION_BUS_ADDRESS", nil)) do
    safe_system(browser, *args)
  end
end

#exec_editor(*args) ⇒ Object 



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# File 'extend/kernel.rb', line 303

def exec_editor(*args)
  puts "Editing #{args.join "\n"}"
  with_homebrew_path { safe_system(*which_editor.shellsplit, *args) }
end

#gzip(*paths) ⇒ Object

GZips the given paths, and returns the gzipped paths.



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# File 'extend/kernel.rb', line 321

def gzip(*paths)
  odisabled "Utils.gzip", "Utils::Gzip.compress"
  Utils::Gzip.compress(*paths)
end

#ignore_interrupts(_opt = nil) ⇒ Object 



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# File 'extend/kernel.rb', line 326

def ignore_interrupts(_opt = nil)
  # rubocop:disable Style/GlobalVars
  $ignore_interrupts_nesting_level = 0 unless defined?($ignore_interrupts_nesting_level)
  $ignore_interrupts_nesting_level += 1

  $ignore_interrupts_interrupted = false unless defined?($ignore_interrupts_interrupted)
  old_sigint_handler = trap(:INT) do
    $ignore_interrupts_interrupted = true
    $stderr.print "\n"
    $stderr.puts "One sec, cleaning up..."
  end

  begin
    yield
  ensure
    trap(:INT, old_sigint_handler)

    $ignore_interrupts_nesting_level -= 1
    if $ignore_interrupts_nesting_level == 0 && $ignore_interrupts_interrupted
      $ignore_interrupts_interrupted = false
      raise Interrupt
    end
  end
  # rubocop:enable Style/GlobalVars
end

#interactive_shell(formula = nil) ⇒ Object 



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# File 'extend/kernel.rb', line 211

def interactive_shell(formula = nil)
  unless formula.nil?
    ENV["HOMEBREW_DEBUG_PREFIX"] = formula.prefix
    ENV["HOMEBREW_DEBUG_INSTALL"] = formula.full_name
  end

  if Utils::Shell.preferred == :zsh && (home = Dir.home).start_with?(HOMEBREW_TEMP.resolved_path.to_s)
    FileUtils.mkdir_p home
    FileUtils.touch "#{home}/.zshrc"
  end

  Process.wait fork { exec Utils::Shell.preferred_path(default: "/bin/bash") }

  return if $CHILD_STATUS.success?
  raise "Aborted due to non-zero exit status (#{$CHILD_STATUS.exitstatus})" if $CHILD_STATUS.exited?

  raise $CHILD_STATUS.inspect
end

#number_readable(number) ⇒ Object 



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# File 'extend/kernel.rb', line 442

def number_readable(number)
  numstr = number.to_i.to_s
  (numstr.size - 3).step(1, -3) { |i| numstr.insert(i, ",") }
  numstr
end

#odebug(title, *sput, always_display: false) ⇒ Object 



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# File 'extend/kernel.rb', line 33

def odebug(title, *sput, always_display: false)
  debug = if respond_to?(:debug)
    T.unsafe(self).debug?
  else
    Context.current.debug?
  end

  return if !debug && !always_display

  $stderr.puts Formatter.headline(title, color: :magenta)
  $stderr.puts sput unless sput.empty?
end

#odeprecated(method, replacement = nil, disable: false, disable_on: nil, disable_for_developers: true, caller: send(:caller)) ⇒ Object 



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# File 'extend/kernel.rb', line 86

def odeprecated(method, replacement = nil,
                disable:                false,
                disable_on:             nil,
                disable_for_developers: true,
                caller:                 send(:caller))
  replacement_message = if replacement
    "Use #{replacement} instead."
  else
    "There is no replacement."
  end

  unless disable_on.nil?
    if disable_on > Time.now
      will_be_disabled_message = " and will be disabled on #{disable_on.strftime("%Y-%m-%d")}"
    else
      disable = true
    end
  end

  verb = if disable
    "disabled"
  else
    "deprecated#{will_be_disabled_message}"
  end

  # Try to show the most relevant location in message, i.e. (if applicable):
  # - Location in a formula.
  # - Location of caller of deprecated method (if all else fails).
  backtrace = caller

  # Don't throw deprecations at all for cached, .brew or .metadata files.
  return if backtrace.any? do |line|
    next true if line.include?(HOMEBREW_CACHE.to_s)
    next true if line.include?("/.brew/")
    next true if line.include?("/.metadata/")

    next false unless line.match?(HOMEBREW_TAP_PATH_REGEX)

    path = Pathname(line.split(":", 2).first)
    next false unless path.file?
    next false unless path.readable?

    formula_contents = path.read
    formula_contents.include?(" deprecate! ") || formula_contents.include?(" disable! ")
  end

  tap_message = T.let(nil, T.nilable(String))

  backtrace.each do |line|
    next unless (match = line.match(HOMEBREW_TAP_PATH_REGEX))

    tap = Tap.fetch(match[:user], match[:repo])
    tap_message = +"\nPlease report this issue to the #{tap} tap (not Homebrew/brew or Homebrew/homebrew-core)"
    tap_message += ", or even better, submit a PR to fix it" if replacement
    tap_message << ":\n  #{line.sub(/^(.*:\d+):.*$/, '\1')}\n\n"
    break
  end

  message = +"Calling #{method} is #{verb}! #{replacement_message}"
  message << tap_message if tap_message
  message.freeze

  disable = true if disable_for_developers && Homebrew::EnvConfig.developer?
  if disable || Homebrew.raise_deprecation_exceptions?
    exception = MethodDeprecatedError.new(message)
    exception.set_backtrace(backtrace)
    raise exception
  elsif !Homebrew.auditing?
    opoo message
  end
end

#odie(error) ⇒ T.noreturn

Parameters:

Returns:

  • (T.noreturn) 


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# File 'extend/kernel.rb', line 81

def odie(error)
  onoe error
  exit 1
end

#odisabled(method, replacement = nil, **options) ⇒ Object 



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# File 'extend/kernel.rb', line 158

def odisabled(method, replacement = nil, **options)
  options = { disable: true, caller: caller }.merge(options)
  # This odeprecated should stick around indefinitely.
  odeprecated(method, replacement, **options)
end

#ofail(error) ⇒ Object 



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# File 'extend/kernel.rb', line 75

def ofail(error)
  onoe error
  Homebrew.failed = true
end

#oh1(title, truncate: :auto) ⇒ Object 



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# File 'extend/kernel.rb', line 57

def oh1(title, truncate: :auto)
  puts oh1_title(title, truncate: truncate)
end

#oh1_title(title, truncate: :auto) ⇒ Object 



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# File 'extend/kernel.rb', line 46

def oh1_title(title, truncate: :auto)
  verbose = if respond_to?(:verbose?)
    T.unsafe(self).verbose?
  else
    Context.current.verbose?
  end

  title = Tty.truncate(title.to_s) if $stdout.tty? && !verbose && truncate == :auto
  Formatter.headline(title, color: :green)
end

#ohai(title, *sput) ⇒ Object 



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# File 'extend/kernel.rb', line 28

def ohai(title, *sput)
  puts ohai_title(title)
  puts sput
end

#ohai_title(title) ⇒ Object 



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# File 'extend/kernel.rb', line 17

def ohai_title(title)
  verbose = if respond_to?(:verbose?)
    T.unsafe(self).verbose?
  else
    Context.current.verbose?
  end

  title = Tty.truncate(title.to_s) if $stdout.tty? && !verbose
  Formatter.headline(title, color: :blue)
end

#onoe(message) ⇒ Object

Print a message prefixed with “Error”.



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# File 'extend/kernel.rb', line 69

def onoe(message)
  Tty.with($stderr) do |stderr|
    stderr.puts Formatter.error(message, label: "Error")
  end
end

#opoo(message) ⇒ Object

Print a message prefixed with “Warning” (do this rarely).



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# File 'extend/kernel.rb', line 62

def opoo(message)
  Tty.with($stderr) do |stderr|
    stderr.puts Formatter.warning(message, label: "Warning")
  end
end

#paths ⇒ Object 



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# File 'extend/kernel.rb', line 415

def paths
  @paths ||= ORIGINAL_PATHS.uniq.map(&:to_s)
end

#preferred_shell ⇒ String

Returns:



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# File 'extend/kernel.rb', line 506

def preferred_shell
  odisabled "preferred_shell"
  Utils::Shell.preferred_path(default: "/bin/sh")
end

#pretty_duration(seconds) ⇒ Object 



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# File 'extend/kernel.rb', line 194

def pretty_duration(seconds)
  seconds = seconds.to_i
  res = +""

  if seconds > 59
    minutes = seconds / 60
    seconds %= 60
    res = +Utils.pluralize("minute", minutes, include_count: true)
    return res.freeze if seconds.zero?

    res << " "
  end

  res << Utils.pluralize("second", seconds, include_count: true)
  res.freeze
end

#pretty_installed(formula) ⇒ Object 



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# File 'extend/kernel.rb', line 164

def pretty_installed(formula)
  if !$stdout.tty?
    formula.to_s
  elsif Homebrew::EnvConfig.no_emoji?
    Formatter.success("#{Tty.bold}#{formula} (installed)#{Tty.reset}")
  else
    "#{Tty.bold}#{formula} #{Formatter.success("✔")}#{Tty.reset}"
  end
end

#pretty_outdated(formula) ⇒ Object 



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# File 'extend/kernel.rb', line 174

def pretty_outdated(formula)
  if !$stdout.tty?
    formula.to_s
  elsif Homebrew::EnvConfig.no_emoji?
    Formatter.error("#{Tty.bold}#{formula} (outdated)#{Tty.reset}")
  else
    "#{Tty.bold}#{formula} #{Formatter.warning("⚠")}#{Tty.reset}"
  end
end

#pretty_uninstalled(formula) ⇒ Object 



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# File 'extend/kernel.rb', line 184

def pretty_uninstalled(formula)
  if !$stdout.tty?
    formula.to_s
  elsif Homebrew::EnvConfig.no_emoji?
    Formatter.error("#{Tty.bold}#{formula} (uninstalled)#{Tty.reset}")
  else
    "#{Tty.bold}#{formula} #{Formatter.error("✘")}#{Tty.reset}"
  end
end

#quiet_system(cmd, *args) ⇒ Object

Prints no output.



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# File 'extend/kernel.rb', line 246

def quiet_system(cmd, *args)
  Homebrew._system(cmd, *args) do
    # Redirect output streams to `/dev/null` instead of closing as some programs
    # will fail to execute if they can't write to an open stream.
    $stdout.reopen("/dev/null")
    $stderr.reopen("/dev/null")
  end
end

#redact_secrets(input, secrets) ⇒ Object 



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# File 'extend/kernel.rb', line 529

def redact_secrets(input, secrets)
  secrets.compact
         .reduce(input) { |str, secret| str.gsub secret, "******" }
         .freeze
end

#redirect_stdout(file) ⇒ Object 



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# File 'extend/kernel.rb', line 352

def redirect_stdout(file)
  out = $stdout.dup
  $stdout.reopen(file)
  yield
ensure
  $stdout.reopen(out)
  out.close
end

#require?(path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'extend/kernel.rb', line 7

def require?(path)
  return false if path.nil?

  require path
  true
rescue LoadError => e
  # we should raise on syntax errors but not if the file doesn't exist.
  raise unless e.message.include?(path)
end

#safe_system(cmd, *args, **options) ⇒ Object

Kernel.system but with exceptions.

Raises:



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# File 'extend/kernel.rb', line 239

def safe_system(cmd, *args, **options)
  return if Homebrew.system(cmd, *args, **options)

  raise ErrorDuringExecution.new([cmd, *args], status: $CHILD_STATUS)
end

#shell_profile ⇒ String

Returns:



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# File 'extend/kernel.rb', line 512

def shell_profile
  odisabled "shell_profile"
  Utils::Shell.profile
end

#tap_and_name_comparison ⇒ Object 



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# File 'extend/kernel.rb', line 517

def tap_and_name_comparison
  proc do |a, b|
    if a.include?("/") && b.exclude?("/")
      1
    elsif a.exclude?("/") && b.include?("/")
      -1
    else
      a <=> b
    end
  end
end

#truncate_text_to_approximate_size(str, max_bytes, options = {}) ⇒ Object

Truncates a text string to fit within a byte size constraint, preserving character encoding validity. The returned string will be not much longer than the specified max_bytes, though the exact shortfall or overrun may vary.



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# File 'extend/kernel.rb', line 452

def truncate_text_to_approximate_size(str, max_bytes, options = {})
  front_weight = options.fetch(:front_weight, 0.5)
  raise "opts[:front_weight] must be between 0.0 and 1.0" if front_weight < 0.0 || front_weight > 1.0
  return str if str.bytesize <= max_bytes

  glue = "\n[...snip...]\n"
  max_bytes_in = [max_bytes - glue.bytesize, 1].max
  bytes = str.dup.force_encoding("BINARY")
  glue_bytes = glue.encode("BINARY")
  n_front_bytes = (max_bytes_in * front_weight).floor
  n_back_bytes = max_bytes_in - n_front_bytes
  if n_front_bytes.zero?
    front = bytes[1..0]
    back = bytes[-max_bytes_in..]
  elsif n_back_bytes.zero?
    front = bytes[0..(max_bytes_in - 1)]
    back = bytes[1..0]
  else
    front = bytes[0..(n_front_bytes - 1)]
    back = bytes[-n_back_bytes..]
  end
  out = front + glue_bytes + back
  out.force_encoding("UTF-8")
  out.encode!("UTF-16", invalid: :replace)
  out.encode!("UTF-8")
  out
end

#which(cmd, path = ENV.fetch("PATH")) ⇒ Object 



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# File 'extend/kernel.rb', line 255

def which(cmd, path = ENV.fetch("PATH"))
  PATH.new(path).each do |p|
    begin
      pcmd = File.expand_path(cmd, p)
    rescue ArgumentError
      # File.expand_path will raise an ArgumentError if the path is malformed.
      # See https://github.com/Homebrew/legacy-homebrew/issues/32789
      next
    end
    return Pathname.new(pcmd) if File.file?(pcmd) && File.executable?(pcmd)
  end
  nil
end

#which_all(cmd, path = ENV.fetch("PATH")) ⇒ Object 



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# File 'extend/kernel.rb', line 269

def which_all(cmd, path = ENV.fetch("PATH"))
  PATH.new(path).map do |p|
    begin
      pcmd = File.expand_path(cmd, p)
    rescue ArgumentError
      # File.expand_path will raise an ArgumentError if the path is malformed.
      # See https://github.com/Homebrew/legacy-homebrew/issues/32789
      next
    end
    Pathname.new(pcmd) if File.file?(pcmd) && File.executable?(pcmd)
  end.compact.uniq
end

#which_editor(silent: false) ⇒ Object 



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# File 'extend/kernel.rb', line 282

def which_editor(silent: false)
  editor = Homebrew::EnvConfig.editor
  return editor if editor

  # Find VS Code, Sublime Text, Textmate, BBEdit, or vim
  editor = %w[code subl mate bbedit vim].find do |candidate|
    candidate if which(candidate, ORIGINAL_PATHS)
  end
  editor ||= "vim"

  unless silent
    opoo <<~EOS
      Using #{editor} because no editor was set in the environment.
      This may change in the future, so we recommend setting EDITOR
      or HOMEBREW_EDITOR to your preferred text editor.
    EOS
  end

  editor
end

#with_custom_locale(locale, &block) ⇒ Object 



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# File 'extend/kernel.rb', line 234

def with_custom_locale(locale, &block)
  with_env(LC_ALL: locale, &block)
end

#with_env(hash) ⇒ Object

Note:

This method is not thread-safe - other threads which happen to be scheduled during the block will also see these environment variables.

Calls the given block with the passed environment variables added to ENV, then restores ENV afterwards.

with_env(PATH: "/bin") do
  system "echo $PATH"
end


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# File 'extend/kernel.rb', line 490

def with_env(hash)
  old_values = {}
  begin
    hash.each do |key, value|
      key = key.to_s
      old_values[key] = ENV.delete(key)
      ENV[key] = value
    end

    yield if block_given?
  ensure
    ENV.update(old_values)
  end
end

#with_homebrew_path(&block) ⇒ Object 



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# File 'extend/kernel.rb', line 230

def with_homebrew_path(&block)
  with_env(PATH: PATH.new(ORIGINAL_PATHS), &block)
end