Module: Nuggets::File::WhichMixin

Included in:
File
Defined in:
lib/nuggets/file/which_mixin.rb

Instance Method Summary collapse

Instance Method Details

#which(executable) ⇒ Object

call-seq:

File.which(executable) => aString or nil

Returns the full path to executable, or nil if not found in PATH. Inspired by Gnuplot.which – thx, Gordon!



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# File 'lib/nuggets/file/which_mixin.rb', line 37

def which(executable)
  return executable if executable?(executable)

  if path = ENV['PATH']
    path.split(::File::PATH_SEPARATOR).each { |dir|
      candidate = join(expand_path(dir), executable)
      return candidate if executable?(candidate)
    }
  end

  nil
end

#which_command(commands) ⇒ Object

call-seq:

File.which_command(commands) => aString or nil

Returns the first of commands that is executable.



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# File 'lib/nuggets/file/which_mixin.rb', line 54

def which_command(commands)
  commands.find { |command| which(command[/\S+/]) }
end