Module: Kernel

Included in:
Cask::DSL::DependsOn, Dependencies, DependenciesHelpers, Ignorable, Requirements, Utils::AST
Defined in:
extend/kernel.rb

Constant Summary collapse

IGNORE_INTERRUPTS_MUTEX = 
T.let(Thread::Mutex.new.freeze, Thread::Mutex)

Instance Method Summary collapse

Instance Method Details

#disk_usage_readable(size_in_bytes) ⇒ 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:

  • size_in_bytes (Integer, Float)

Returns:



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# File 'extend/kernel.rb', line 205

def disk_usage_readable(size_in_bytes)
  if size_in_bytes.abs >= 1_073_741_824
    size = size_in_bytes.to_f / 1_073_741_824
    unit = "GB"
  elsif size_in_bytes.abs >= 1_048_576
    size = size_in_bytes.to_f / 1_048_576
    unit = "MB"
  elsif size_in_bytes.abs >= 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:)}#{unit}"
  end
end

#ensure_executable!(name, formula_name = nil, reason: "", latest: false) ⇒ Pathname?

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.

Ensure the given executable is exist otherwise install the brewed version

Parameters:

  • name (String)
  • formula_name (String, nil) (defaults to: nil)
  • reason (String) (defaults to: "")
  • latest (Boolean) (defaults to: false)

Returns:



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# File 'extend/kernel.rb', line 187

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

  executable = [
    which(name),
    which(name, ORIGINAL_PATHS),
    # We prefer the opt_bin path to a formula's executable over the prefix
    # path where available, since the former is stable during upgrades.
    HOMEBREW_PREFIX/"opt/#{formula_name}/bin/#{name}",
    HOMEBREW_PREFIX/"bin/#{name}",
  ].compact.first
  return executable if executable.exist?

  require "formula"
  Formula[formula_name].ensure_installed!(reason:, latest:).opt_bin/name
end

#exec_browser(*args) ⇒ 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:



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# File 'extend/kernel.rb', line 136

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(*filenames) ⇒ 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:



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# File 'extend/kernel.rb', line 130

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

#ignore_interrupts(&_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:

  • _block (T.proc.returns(T.type_parameter(:U)))

Returns:

  • (T.type_parameter(:U)) 


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# File 'extend/kernel.rb', line 151

def ignore_interrupts(&_block)
  IGNORE_INTERRUPTS_MUTEX.synchronize do
    interrupted = T.let(false, T::Boolean)
    old_sigint_handler = trap(:INT) do
      interrupted = true

      $stderr.print "\n"
      $stderr.puts "One sec, cleaning up..."
    end

    begin
      yield
    ensure
      trap(:INT, old_sigint_handler)

      raise Interrupt if interrupted
    end
  end
end

#interactive_shell(formula = nil) ⇒ 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:

  • formula (Formula, nil) (defaults to: nil) 


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# File 'extend/kernel.rb', line 16

def interactive_shell(formula = nil)
  unless formula.nil?
    ENV["HOMEBREW_DEBUG_PREFIX"] = formula.prefix.to_s
    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) ⇒ 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:

  • number (Integer)

Returns:



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# File 'extend/kernel.rb', line 229

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

#quiet_system(cmd, argv0 = nil, *args) ⇒ 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.

Run a system command without any output.

Parameters:

Returns:

  • (Boolean) 


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# File 'extend/kernel.rb', line 77

def quiet_system(cmd, argv0 = nil, *args)
  # TODO: migrate to utils.rb Homebrew.quiet_system
  require "utils"

  Homebrew._system(cmd, argv0, *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(File::NULL)
    $stderr.reopen(File::NULL)
  end
end

#redact_secrets(input, secrets) ⇒ 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 'extend/kernel.rb', line 318

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

#redirect_stdout(file, &_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:

  • file (IO, Pathname, String)
  • _block (T.proc.returns(T.type_parameter(:U)))

Returns:

  • (T.type_parameter(:U)) 


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# File 'extend/kernel.rb', line 176

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

#safe_system(cmd, argv0 = nil, *args, **options) ⇒ 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.

Kernel.system but with exceptions.

Parameters:

Raises:



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# File 'extend/kernel.rb', line 58

def safe_system(cmd, argv0 = nil, *args, **options)
  # TODO: migrate to utils.rb Homebrew.safe_system
  require "utils"

  return if Homebrew.system(cmd, argv0, *args, **options)

  raise ErrorDuringExecution.new([cmd, argv0, *args], status: $CHILD_STATUS)
end

#tap_and_name_comparison ⇒ T.proc.params(a: String, b: String).returns(Integer)

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 'extend/kernel.rb', line 305

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 = {}) ⇒ 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.

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.

Parameters:

  • str (String)
  • max_bytes (Integer)
  • options (Hash{Symbol => T.untyped}) (defaults to: {})

Returns:



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# File 'extend/kernel.rb', line 240

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 = T.must(front) + glue_bytes + T.must(back)
  out.force_encoding("UTF-8")
  out.encode!("UTF-16", invalid: :replace)
  out.encode!("UTF-8")
  out
end

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

Find a command.

Parameters:

Returns:



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# File 'extend/kernel.rb', line 93

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_editor(silent: 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:

  • silent (Boolean) (defaults to: false)

Returns:



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# File 'extend/kernel.rb', line 108

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

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

  unless silent
    Utils::Output.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) ⇒ 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:

  • locale (String)
  • block (T.proc.returns(T.type_parameter(:U)))

Returns:

  • (T.type_parameter(:U)) 


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# File 'extend/kernel.rb', line 45

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

#with_env(hash, &_block) ⇒ T.type_parameter(:U)

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.

Example

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

Parameters:

Returns:

  • (T.type_parameter(:U)) 


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# File 'extend/kernel.rb', line 289

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

    yield
  ensure
    ENV.update(old_values)
  end
end

#with_homebrew_path(&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:

  • block (T.proc.returns(T.type_parameter(:U)))

Returns:

  • (T.type_parameter(:U)) 


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# File 'extend/kernel.rb', line 36

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