Re: [Boost-build] How do I write a rule to generate a single cpp from xml/xsl?

From: Mark Evans (evans_mark_at_[hidden])
Date: 2006-02-11 07:19:32

Here's a rookie answer with some additional questions for experts:
  
  Presuming you already have the generator set up saying that type CPP  can be generated from types XML and XSLT (analogous to the stock rules  that generate EXE from sources of types OBJ and LIB) using actions  gen-cpp, you can put logic in your action rule block more or less like  the following:
  
  rule xml-sources-in ( sources * )
  {
    local xml-souces ;
    ...
    #  What's the best jammer way here to cull the .xml sources?
    return $(xml-sources) ;
  }
  rule xlt-sources-in ( sources * )
  {
    local xlt-souces ;
      ...
    return $(xlt-sources) ;
  }
  
  rule gen-cpp ( targets * : sources * : properties * )
  {
    XML-SOURCES on $(targets) =  [ xml-sources-in $(sources) ] ;
    XSLT-SOURCES on $(targets) = [ xslt-sources-in $(sources) ] ;
    # Experts:  Is there a more direct jammer way to do the above that would
    # not require xml-sources-in and xslt-sources-in rules?
    SP on $(targets) = " " ;
  }
actions gen-cpp bind XML-SOURCES XSLT-SOURCES
  {
    $(TOOL) -IN$(SP)$(XML-SOURCES) -XSL$(SP)$(XSLT-SOURCES) -out$(SP)$(<) 
    touch -r $(XML-SOURCES) $(<)
  }
  
  Use similar approach for generating HTM type. 
  
  Experts, did I miss anything?  Would you have discriminated  further upstream in the generator to automatically populate XML-SOURCES  and XSLT-SOURCES for the actions block and obviate the need for all the  noise above?  (I anticipate a YES answer to that.)
  
  Cheers,
  Mark
  
Daniel Einspanjer <deinspanjer_at_[hidden]> wrote:  In our make files, we have something like the following targets:

==================================
attrs: attrs.cpp attrs.htm

attrs.cpp: attrs.xml attrs.xslt
 $(JAVA_HOME)/bin/java org.apache.xalan.xslt.Process -IN attrs.xml -XSL 
attrs.xslt -out $@
 touch -r attrs.xml $@

attrs.htm: attrs.xml attrstohtml.xslt
 $(JAVA_HOME)/bin/java org.apache.xalan.xslt.Process -IN attrs.xml -XSL 
attrstohtml.xslt -out attrs.htm
 touch -r attrs.xml $@