source: downloads/boost_1_33_1/tools/build/v2/tools/notfile.jam @ 12

#  Copyright (c) 2005 Vladimir Prus.
#
#  Use, modification and distribution is subject to the Boost Software
#  License Version 1.0. (See accompanying file LICENSE_1_0.txt or
#  http://www.boost.org/LICENSE_1_0.txt)

import generators ;
import type ;
import feature ;
import project ;
import targets ;
import toolset ;
import "class" : new ;

feature.feature action : : free ;
type.register NOTFILE_MAIN ;



class notfile-generator : generator
{
    rule __init__ ( * : * )
    {
        generator.__init__ $(1) : $(2) : $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ;
    }
    
    rule run ( project name ? : property-set : sources * : multiple ? )
    {
        local action ;
        local action-name = [ $(property-set).get <action> ] ;
        
        local m = [ MATCH ^@(.*) : $(action-name) ] ;
        
        if $(m)        
        {
            action = [ new action $(sources) : $(m[1]) 
              : $(property-set) ] ;                
        }
        else
        {
            action = [ new action $(sources) : notfile.run 
              : $(property-set) ] ;              
        }                
        return [ new notfile-target $(name) : $(project) : $(action) ] ;
    }       
}

generators.register [ new notfile-generator notfile.main : : NOTFILE_MAIN ] ;

toolset.flags notfile.run ACTION : <action> ;
actions run
{
    $(ACTION)
}


rule notfile ( target-name : action + : sources * : requirements * : default-build * )
{ 
  local project = [ project.current ] ;
    
  requirements += <action>$(action) ;
    
  targets.main-target-alternative 
    [ new typed-target $(target-name) : $(project) : NOTFILE_MAIN
        : [ targets.main-target-sources $(sources) : $(target-name) ] 
        : [ targets.main-target-requirements $(requirements) : $(project) ]
        : [ targets.main-target-default-build $(default-build) : $(project) ] 
    ] ;
}

IMPORT $(__name__) : notfile : : notfile ;