Module: GVUtils

Included in:
Dot2Ruby, GraphViz
Defined in:
lib/graphviz/utils.rb

Instance Method Summary collapse

Instance Method Details

#escape_path_containing_blanks(path) ⇒ Object

:nodoc:



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# File 'lib/graphviz/utils.rb', line 34

def escape_path_containing_blanks(path) #:nodoc:
  path.gsub!(File::ALT_SEPARATOR, File::SEPARATOR) if File::ALT_SEPARATOR
  path_elements = path.split(File::SEPARATOR)
  path_elements.map! do |element|
    if element.include?(' ')
      "\"#{element}\""
    else
      element
    end
  end
  path_elements.join(File::SEPARATOR)
end

#find_executable(bin, paths) ⇒ Object

Since this code is an adaptation of Launchy::Application#find_executable (copiousfreetime.rubyforge.org/launchy/Launchy/Application.html) it follow is licence :

Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED AS IS AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.



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# File 'lib/graphviz/utils.rb', line 19

def find_executable(bin, paths) #:nodoc:
  paths = ENV['PATH'].split(File::PATH_SEPARATOR) if paths.nil? or paths.empty?

  paths.each do |path|    
    file = (path.nil?)?bin:File.join(path,bin)
    if File.executable?(file) and not File.directory?(file) then
      return file
    elsif Config::CONFIG['host_os'] =~ /mswin|mingw/ # WAS: elsif RUBY_PLATFORM =~ /mswin|mingw/
      found_ext = (ENV['PATHEXT'] || '.exe;.bat;.com').split(";").find {|ext| File.executable?(file + ext) }
      return file + found_ext if found_ext
    end
  end
  return nil
end

#output_and_errors_from_command(cmd) ⇒ Object

:nodoc:



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# File 'lib/graphviz/utils.rb', line 47

def output_and_errors_from_command(cmd) #:nodoc:
 unless defined? Open3
   begin
     require 'open3'
     require 'win32/open3'
   rescue LoadError
   end
 end
 begin
   Open3.popen3( cmd ) do |stdin, stdout, stderr|
     stdin.close
     stdout.binmode
     [stdout.read, stderr.read]
   end
 rescue NotImplementedError, NoMethodError
   IO.popen( cmd ) do |stdout|
     stdout.binmode
     [stdout.read, nil]
   end
 end
end

#output_from_command(cmd) ⇒ Object

:nodoc:



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# File 'lib/graphviz/utils.rb', line 69

def output_from_command(cmd) #:nodoc:
 output, errors = output_and_errors_from_command(cmd)
 if errors.nil? || errors.strip.empty?
   output
 else
   raise "Error from #{cmd}:\n#{errors}"
 end
end