Class: Command

Inherits:
Hash
  • Object
show all
Defined in:
lib/command.rb

Overview

Command

execution of system commands

Keys

  • :input The input of the commands.

  • :timeout The timeout in seconds.

    a value of zero is to infinite timeout.
defaults to zero

  • :directory The working directory for the command.

    defaults to the current directory

  • :exit_code The exit code of the command

  • :output The output contains the stdout output of the command

  • :error The error contains stderr output of the command

  • :machine The name of the machine the command executed on

  • :user The user name

  • :start_time

  • :end_time

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(command) ⇒ Command

Returns a new instance of Command.



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# File 'lib/command.rb', line 27

def initialize command

   self[:input] = ''
	self[:timeout] = 0
	self[:directory] = ''
	self[:exit_code] = 0
	self[:output] = ''
	self[:error] = ''
	self[:machine] = ''
	self[:user] = ''
	self[:start_time] = nil
	self[:end_time] = nil

	if(command.kind_of?(String))
	  self[:input] = command
       end

       if(command.kind_of?(Hash))
       	command.each{|k,v|
       		self[k.to_sym]=v
       	}
       end
end

Class Method Details

.dev_root ⇒ Object 



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# File 'lib/command.rb', line 131

def self.dev_root
  ["DEV_HOME","DEV_ROOT"].each {|v|
    return ENV[v].gsub('\\','/') unless ENV[v].nil?
  }
  dir=home
  #dir=ENV["DEV_ROOT"].gsub('\\','/') unless ENV["DEV_ROOT"].nil?
 return dir
end

.exit_code(command) ⇒ Object 



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# File 'lib/command.rb', line 140

def self.exit_code command
	cmd = Command.new(command)
	cmd[:ignore_failure]=true
  cmd[:quiet]=true
	cmd.execute
	cmd[:exit_code]
end

.home ⇒ Object 



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# File 'lib/command.rb', line 121

def self.home 
  ["USERPROFILE","HOME"].each {|v|
    return ENV[v].gsub('\\','/') unless ENV[v].nil?
  }
  dir="~"
  dir=ENV["HOME"] unless ENV["HOME"].nil?
  dir=ENV["USERPROFILE"].gsub('\\','/') unless ENV["USERPROFILE"].nil?
  return dir
end

.machine ⇒ Object 



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# File 'lib/command.rb', line 107

def self.machine
  if !ENV['COMPUTERNAME'].nil? 
return ENV['COMPUTERNAME']
	  end

  machine = `hostname`
  machine = machine.split('.')[0] if machine.include?('.')
	  return machine.strip
end

.output(command) ⇒ Object 



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# File 'lib/command.rb', line 148

def self.output command
	cmd = Command.new(command)
	cmd[:ignore_failure]=true
  cmd[:quiet]=true
	cmd.execute
	cmd[:output]
end

.user ⇒ Object 



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# File 'lib/command.rb', line 117

def self.user
  ENV['USER'].nil? ? ENV['USERNAME'] : ENV['USER']
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/command.rb', line 51

def execute
	
	pwd=Dir.pwd
	Dir.chdir(self[:directory]) if(self.has_key?(:directory) && File.exists?(self[:directory]))
	self[:directory] = pwd if(self[:directory].length==0)
	
   puts "#{self[:input]} (#{self[:directory]})" if(!self.has_key?(:quiet) || !self[:quiet])

	self[:machine] = Command.machine
	self[:user] = Command.user

	self[:start_time]=Time.now
	timer=Timer.new
	if self[:input].include?('<%') && self[:input].include?('%>')
	  ruby = self[:input].gsub("<%","").gsub("%>","")

	  begin
	    self[:output]=eval(ruby)
	  rescue 
	  	self[:exit_code]=1
	  	self[:error]="unable to eval(#{ruby})"
	  end

	  self[:elapsed] = timer.elapsed_str
	  self[:end_time] = Time.now
	else
		begin
       self[:output],self[:error],status= Open3.capture3(self[:input])
       self[:exit_code]=status.to_i
		  self[:elapsed] = timer.elapsed_str
		  self[:end_time] = Time.now
		rescue Exception => e
		  self[:elapsed] = timer.elapsed_str
		  self[:end_time] = Time.now
		  self[:error] = "Exception: " + e.to_s
		  self[:exit_code]=1
	    end
	end

       Dir.chdir(pwd) if pwd != Dir.pwd

       if(self[:exit_code] != 0)
         if(!self.has_key?(:quiet) || !self[:quiet])
       	  puts ' '
       	  puts "exit_code=#{self[:exit_code]}"
       	  puts ' '
       	  puts self[:output]
       	  puts self[:error]
       	  puts ' '
         end
       	if(!self.has_key?(:ignore_failure) || !self[:ignore_failure])
       		raise "#{self[:input]} failed" 
       	end #unless (self.has_key?(:ignore_failure) && self[:ignore_failure]==true)
       end
end

#to_html ⇒ Object 



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# File 'lib/command.rb', line 156

def to_html
  if self[:exit_code] == 0
  [
  	'<div><table><tr><td width="20"></td><td><pre>',
  	self[:input],
  	'</pre></td></tr></table></div>'
  ].join
  else
  [
  	'<div><table><tr><td width="20"></td><td><pre>',
  	self[:input],
    '</pre><table><tr><td width="20"></td><td><table>',
    map { |k, v| ["<tr><td><strong>#{k}</strong></td>", v.respond_to?(:to_html) ? v.to_html : "<td><span><pre>#{v}</pre></span></td></tr>"] },
    '</table>',
    '</td></tr></table></td></tr></table></div>'
  ].join
  end
end