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Module: Rake::FileUtilsExt

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Extended In:
::Rake, ::self
Included In:
DSL, MakefileLoader, PackageTask, TaskLib, TestTask
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, ::FileUtils
Defined in: lib/rake/file_utils_ext.rb

Overview

FileUtilsExt provides a custom version of the ::FileUtils methods that respond to the #verbose and #nowrite commands.

Constant Summary

::FileUtils - Included

LN_SUPPORTED, RUBY

Class Attribute Summary

Instance Method Summary

::FileUtils - Included

#ruby

Run a Ruby interpreter with the given arguments.
#safe_ln

Attempt to do a normal file link, but fall back to a copy if the link fails.
#sh

Run the system command cmd.
#split_all

Split a file path into individual directory names.
#create_shell_runner, #set_verbose_option, #sh_show_command

Class Attribute Details

.nowrite_flag (rw)

[ GitHub ] 

  


# File 'lib/rake/file_utils_ext.rb', line 14



attr_accessor :verbose_flag, :nowrite_flag


  








  

    .verbose_flag   (rw)
  

  [ GitHub ]


  

  


# File 'lib/rake/file_utils_ext.rb', line 14



attr_accessor :verbose_flag, :nowrite_flag


  







Instance Method Details



  

    #nowrite(value = nil)  
  



  

    

Get/set the nowrite flag controlling output from the ::FileUtils utilities.  If verbose is true, then the utility method is echoed to standard output.



Examples:



nowrite              # return the current value of the
                     # nowrite flag
nowrite(v)           # set the nowrite flag to _v_.
nowrite(v) { code }  # Execute code with the nowrite flag set
                     # temporarily to _v_. Return to the
                     # original value when code is done.


  



  [ GitHub ]


  

  


# File 'lib/rake/file_utils_ext.rb', line 78



def nowrite(value=nil)
  oldvalue = FileUtilsExt.nowrite_flag
  FileUtilsExt.nowrite_flag = value unless value.nil?
  if block_given?
    begin
      yield
    ensure
      FileUtilsExt.nowrite_flag = oldvalue
    end
  end
  oldvalue
end


  








  

    #rake_check_options(options, *optdecl)  
  



  

    

Check that the options do not contain options not listed in optdecl.  An ArgumentError exception is thrown if non-declared options are found.


  





  
Raises:


    
  
  • 
    (ArgumentError)
  
    • 





  [ GitHub ]


  

  


# File 'lib/rake/file_utils_ext.rb', line 134



def rake_check_options(options, *optdecl)
  h = options.dup
  optdecl.each do |name|
    h.delete name
  end
  raise ArgumentError, "no such option: #{h.keys.join(' ')}" unless
    h.empty?
end


  








  

    #rake_merge_option(args, defaults)  
  



  

    

Merge the given options with the default values.


  



  [ GitHub ]


  

  


# File 'lib/rake/file_utils_ext.rb', line 117



def rake_merge_option(args, defaults)
  if Hash === args.last
    defaults.update(args.last)
    args.pop
  end
  args.push defaults
  args
end


  








  

    #rake_output_message(message)  
  



  

    

Send the message to the default rake output (which is $stderr).


  



  [ GitHub ]


  

  


# File 'lib/rake/file_utils_ext.rb', line 127



def rake_output_message(message)
  $stderr.puts(message)
end


  








  

    #verbose(value = nil)  
  



  

    

Get/set the verbose flag controlling output from the ::FileUtils utilities.  If verbose is true, then the utility method is echoed to standard output.



Examples:



verbose              # return the current value of the
                     # verbose flag
verbose(v)           # set the verbose flag to _v_.
verbose(v) { code }  # Execute code with the verbose flag set
                     # temporarily to _v_.  Return to the
                     # original value when code is done.


  



  [ GitHub ]


  

  


# File 'lib/rake/file_utils_ext.rb', line 54



def verbose(value=nil)
  oldvalue = FileUtilsExt.verbose_flag
  FileUtilsExt.verbose_flag = value unless value.nil?
  if block_given?
    begin
      yield
    ensure
      FileUtilsExt.verbose_flag = oldvalue
    end
  end
  FileUtilsExt.verbose_flag
end


  








  

    #when_writing(msg = nil)  
  



  

    

Use this function to prevent potentially destructive ruby code from running when the :nowrite flag is set.



Example:



when_writing("Building Project") do
  project.build
end



The following code will build the project under normal conditions. If the nowrite(true) flag is set, then the example will print:



DRYRUN: Building Project



instead of actually building the project.


  



  [ GitHub ]


  

  


# File 'lib/rake/file_utils_ext.rb', line 108



def when_writing(msg=nil)
  if FileUtilsExt.nowrite_flag
    $stderr.puts "DRYRUN: #{msg}" if msg
  else
    yield
  end
end