Results for: "OptionParser"

Creates a new MonitorMixin::ConditionVariable associated with the Monitor object.

Adds aProc as a finalizer, to be called after obj was destroyed. The object ID of the obj will be passed as an argument to aProc. If aProc is a lambda or method, make sure it can be called with a single argument.

The return value is an array [0, aProc].

The two recommended patterns are to either create the finaliser proc in a non-instance method where it can safely capture the needed state, or to use a custom callable object that stores the needed state explicitly as instance variables.

class Foo
  def initialize(data_needed_for_finalization)
    ObjectSpace.define_finalizer(self, self.class.create_finalizer(data_needed_for_finalization))
  end

  def self.create_finalizer(data_needed_for_finalization)
    proc {
      puts "finalizing #{data_needed_for_finalization}"
    }
  end
end

class Bar
 class Remover
    def initialize(data_needed_for_finalization)
      @data_needed_for_finalization = data_needed_for_finalization
    end

    def call(id)
      puts "finalizing #{@data_needed_for_finalization}"
    end
  end

  def initialize(data_needed_for_finalization)
    ObjectSpace.define_finalizer(self, Remover.new(data_needed_for_finalization))
  end
end

Note that if your finalizer references the object to be finalized it will never be run on GC, although it will still be run at exit. You will get a warning if you capture the object to be finalized as the receiver of the finalizer.

class CapturesSelf
  def initialize(name)
    ObjectSpace.define_finalizer(self, proc {
      # this finalizer will only be run on exit
      puts "finalizing #{name}"
    })
  end
end

Also note that finalization can be unpredictable and is never guaranteed to be run except on exit.

Removes all finalizers for obj.

Alias of GC.start

Alias of GC.start

Dump Ruby object to a JSON string.

Combine two Adler-32 check values in to one. adler1 is the first Adler-32 value, adler2 is the second Adler-32 value. len2 is the length of the string used to generate adler2.

Alias of GC.start

Returns the measured GC total time in nanoseconds.

Try to activate a gem containing path. Returns true if activation succeeded or wasn’t needed because it was already activated. Returns false if it can’t find the path in a gem.

Find the full path to the executable for gem name. If the exec_name is not given, an exception will be raised, otherwise the specified executable’s path is returned. requirements allows you to specify specific gem versions.

The mode needed to read a file as straight binary.

Adds a post-installs hook that will be passed a Gem::DependencyInstaller and a list of installed specifications when Gem::DependencyInstaller#install is complete

Adds a hook that will get run after Gem::Specification.reset is run.

Adds a hook that will get run before Gem::Specification.reset is run.

Safely read a file in binary mode on all platforms.

Safely write a file in binary mode on all platforms.

Open a file with given flags

Is this platform Solaris?

Looks for a gem dependency file at path and activates the gems in the file if found. If the file is not found an ArgumentError is raised.

If path is not given the RUBYGEMS_GEMDEPS environment variable is used, but if no file is found no exception is raised.

If ‘-’ is given for path RubyGems searches up from the current working directory for gem dependency files (gem.deps.rb, Gemfile, Isolate) and activates the gems in the first one found.

You can run this automatically when rubygems starts. To enable, set the RUBYGEMS_GEMDEPS environment variable to either the path of your gem dependencies file or “-” to auto-discover in parent directories.

NOTE: Enabling automatic discovery on multiuser systems can lead to execution of arbitrary code when used from directories outside your control.

The path to standard location of the user’s configuration directory.

The path to standard location of the user’s .gemrc file.

Default gem load path

Adds DidYouMean functionality to an error using a given spell checker

Recursively copies files from src to dest.

Arguments src and dest should be interpretable as paths.

If src is the path to a file, copies src to dest:

FileUtils.touch('src0.txt')
File.exist?('dest0.txt') # => false
FileUtils.copy_entry('src0.txt', 'dest0.txt')
File.file?('dest0.txt')  # => true

If src is a directory, recursively copies src to dest:

tree('src1')
# => src1
#    |-- dir0
#    |   |-- src0.txt
#    |   `-- src1.txt
#    `-- dir1
#        |-- src2.txt
#        `-- src3.txt
FileUtils.copy_entry('src1', 'dest1')
tree('dest1')
# => dest1
#    |-- dir0
#    |   |-- src0.txt
#    |   `-- src1.txt
#    `-- dir1
#        |-- src2.txt
#        `-- src3.txt

The recursive copying preserves file types for regular files, directories, and symbolic links; other file types (FIFO streams, device files, etc.) are not supported.

Keyword arguments:

• dereference_root: true - if src is a symbolic link, follows the link.

• preserve: true - preserves file times.

• remove_destination: true - removes dest before copying files.

Related: methods for copying.