Class: Vagrant::Node::ConfigManager

Inherits:
Object
  • Object
show all
Defined in:
lib/vagrant-node/configmanager.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(spath_config_file) ⇒ ConfigManager

Returns a new instance of ConfigManager.



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# File 'lib/vagrant-node/configmanager.rb', line 10

def initialize(spath_config_file)
  @config_file_path = spath_config_file
  config_loader = Config::Loader.new(Config::VERSIONS, Config::VERSIONS_ORDER)
  config_loader.set(:conffile, File.expand_path(@config_file_path))
  @config_global,@config_warnings, @config_errors = config_loader.load([:confile])

  config_content = File.read(@config_file_path)
  
  @config_sexp = RubyParser.new.parse(config_content)

  #If config file is in the default style convert it to a block one 
  convert_default_to_block
  
end

Instance Attribute Details

#config_errors ⇒ Object

Returns the value of attribute config_errors.



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# File 'lib/vagrant-node/configmanager.rb', line 9

def config_errors
  @config_errors
end

#config_global ⇒ Object

Returns the value of attribute config_global.



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# File 'lib/vagrant-node/configmanager.rb', line 9

def config_global
  @config_global
end

#config_sexp ⇒ Object

Returns the value of attribute config_sexp.



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# File 'lib/vagrant-node/configmanager.rb', line 9

def config_sexp
  @config_sexp
end

#config_warnings ⇒ Object

Returns the value of attribute config_warnings.



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# File 'lib/vagrant-node/configmanager.rb', line 9

def config_warnings
  @config_warnings
end

Instance Method Details

#config_content ⇒ Object

Ruby2Ruby modify the parameter, so a deep cloned copy is passed



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# File 'lib/vagrant-node/configmanager.rb', line 298

def config_content        
  begin        
    Ruby2Ruby.new.process(@config_sexp.dclone)
  rescue => e
    raise RestException.new(406,"There was an error processing the config file, check if there is any error")   
  end
end

#delete_vm(vm_name) ⇒ Object

Raises:



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# File 'lib/vagrant-node/configmanager.rb', line 75

def delete_vm (vm_name)        
  index=get_start_index
  
  

  

  if (@config_sexp[0]==:iter)
    nodo=@config_sexp
  else
    nodo=@config_sexp.find_nodes(:iter).first
  end
  

  if (!nodo[VM_INDEX_START].nil?)

    if (nodo[VM_INDEX_START].node_type == :iter)
      vm = nodo[VM_INDEX_START].find_nodes(:call)
      
      if (!vm.empty?)
        leaf= vm.first.find_nodes(:lit)
        
        if (!leaf.empty? && leaf.first.value === vm_name.to_sym)
          nodo.delete_at(VM_INDEX_START)
          
          save
          return true
        end
      end
    elsif (nodo[VM_INDEX_START].node_type == :block)
       nodo[VM_INDEX_START].each_sexp do |vm|            

        
          subnode=vm.find_nodes(:call)              
          if (!subnode.empty?)                  
            leaf=subnode.first.find_nodes(:lit)                  
            if (!leaf.empty? && leaf.first.value === vm_name.to_sym)
              
              nodo[VM_INDEX_START].delete(vm)
              save
              
              return true                    
            end
          end          
        
       end
    end
    
    
  end

  

  raise RestException.new(404,"Virtual Machine #{vm_name} not found")


end

#extract_vms_sexp ⇒ Object

Raises:



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# File 'lib/vagrant-node/configmanager.rb', line 26

def extract_vms_sexp
  

  index=VM_INDEX_START

  if (@config_sexp[0]==:iter)          
    block=@config_sexp
  else
    
    gindex=0
    block=nil
    @config_sexp.each_sexp do |conf|           
       gindex=gindex+1
       if (conf.node_type == :iter)
         block = @config_sexp[gindex]
       end             
    end

  end
    
  


  raise RestException.new(406,
                         "Config File has no virtual machine configured") if (block.nil? ||
                                                                              block.empty? ||
                                                                              block[index].nil?)
       

       
   
  if block[index].node_type==:block
      
      if (block[index].find_nodes(:iter).empty?)
        #One machine with default style
        return default_to_block
        
      else
        #Several machines configured
        return block[index].find_nodes(:iter)
      end

  else   
      
      return [block[index]]
  end
        
end

#get_vm_names ⇒ Object

Raises:



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# File 'lib/vagrant-node/configmanager.rb', line 134

def get_vm_names
  
  index=get_start_index
  raise RestException.new(406,"No virtual machine configured") if @config_sexp[index].nil?

  names = []
  if @config_sexp[index].node_type==:block
    #Entorno con una maquina configurada fuera de bloque
    if (@config_sexp[index].find_nodes(:iter).empty?)
      names.push(:default)
    else
    #Entorno multi vm
      @config_sexp[index].each_sexp do |vm|
        vm.find_nodes(:call).first.find_nodes(:lit).each do |node|
          names.push(node.value)
        end
      end
    end

  else
  #Este caso se produce cuando hay unicamente
  #una maquina virtual configurada. En este caso
  #@config_sexp[VM_INDEX_START] contiene la definicion
  #de la maquina directamente
    node=@config_sexp[index].find_nodes(:call).first.find_node(:lit)
  names.push(node.value)

  end

  names
end

#insert_vms_sexp(vms_sexp) ⇒ Object

Raises:



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# File 'lib/vagrant-node/configmanager.rb', line 181

def insert_vms_sexp(vms_sexp)    
  
  raise RestException.new(406,"Invalid configuration file supplied") if vms_sexp.nil? || vms_sexp.empty?        
  index=VM_INDEX_START        
  


  if @config_sexp[0]==:iter          
    block=@config_sexp
  else          
    gindex=0
    block=nil
    @config_sexp.each_sexp do |conf|           
       gindex=gindex+1
       if (!conf.nil? && conf.node_type == :iter)
         block = @config_sexp[gindex]
       end             
       
    end
  end

  
  
  

  if !block[VM_INDEX_START].nil?          
    # If @config_sexp[VM_INDEX_START] isn't nil could mean three things:
    #  -- There is a machine configured with a default style
    #  -- There are some machines inserted inside a block 
    #  -- There is only one machine and it is stored at block[VM_INDEX_START]
    if block[VM_INDEX_START].node_type==:block
      # If node is a block it could be the first two options
      if (block[VM_INDEX_START].find_nodes(:iter).empty?)
        # This case match the first option, so the steps to perform are the following:
        # -- Create a block node 
          new_block = s(:block)
        # -- Convert the current machine to a block style and insert into the block               
          new_block.add(default_to_block)
        # -- Insert the new vms              
          new_block.add(vms_sexp)                
          
          
        @config_sexp.delete_at(index)              
        
        @config_sexp[index] = new_block
        
         
      else              
        # This case means that there are some machines inserted inside a block
        # we only have to add thems 
        #FIXME FALTA COMPREOBAR SI HACE FALTA RENOMBRAR              
        if @config_sexp[0]==:iter
          @config_sexp[VM_INDEX_START].add(vms_sexp) 
        elsif @config_sexp[0]==:block
           @config_sexp[gindex][VM_INDEX_START].add(vms_sexp)
        end
        
      end

    else           
      

      #There is only one machine stored, we can store it at @config_sexp[index]            
      new_block = s(:block)

      result = extract_vms_sexp
      

      if (@config_sexp[0]==:block)
        #SI el elemento 0 es un bloque

        new_block.add(result)              
        new_block.add(vms_sexp)  
        

        block.delete_at(VM_INDEX_START)
        @config_sexp[gindex][VM_INDEX_START]=new_block

      else
        new_block.add(extract_vms_sexp)
        new_block.add(vms_sexp)
        @config_sexp.delete_at(index)
        

        @config_sexp[index] = new_block
      end            
      
    end
  else
      #If @config_sexp[VM_INDEX_START] is nil means that there isn't any
      #machine configured
      #In order to proceed correctly we have to check if there are one or more
      #vms to be inserted:
      #  -- If there is only one machine to be inserted is must be stored in
      #  @config_sexp[VM_INDEX_START] directly
      #  -- If there are two ore more vms to be inserted they have to be inserted inside 
      #  a block in @config_sexp[VM_INDEX_START]
      
      
      if (vms_sexp.length>1)              
        new_block = s(:block)
        new_block.add(vms_sexp)            
        @config_sexp[index] = new_block
      else              
        @config_sexp[index] = vms_sexp.first                                          
      end
      
  end
  
  # Saving the result to disk
  save

  true

end

#rename_vm(old_name, new_name) ⇒ Object

FIXME REVISAR PORQUE CUANDO QUEDA UNA ÚNICA máquina en un entorno multi vm el fichero cambia



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# File 'lib/vagrant-node/configmanager.rb', line 169

def rename_vm(old_name,new_name)
  
  machines = extract_vms_sexp 
    
  machines.each do |machine|
    machine.find_nodes(:call).first.find_nodes(:lit).each do |node|
      node[1] = new_name.to_sym if (node.value == old_name)
    end
  end  
  
end

#save ⇒ Object 



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# File 'lib/vagrant-node/configmanager.rb', line 306

def save        
  #Processing the content first. If there is any error
  #the file wont'be modified
  content= config_content
  f = File.open(@config_file_path, "w")        
  f.write(content)
  f.write("\n")
  f.close
end