[Python-checkins] CVS: distutils/distutils/command build_ext.py,1.43,1.44

[Greg Ward]

Update of /cvsroot/python/distutils/distutils/command
In directory slayer.i.sourceforge.net:/tmp/cvs-serv729

Modified Files:
	build_ext.py 
Log Message:
Experimental, completely untested SWIG support.

Index: build_ext.py
===================================================================
RCS file: /cvsroot/python/distutils/distutils/command/build_ext.py,v
retrieving revision 1.43
retrieving revision 1.44
diff -C2 -r1.43 -r1.44
*** build_ext.py	2000/06/17 23:04:31	1.43
--- build_ext.py	2000/06/24 00:19:35	1.44
***************
*** 368,377 ****
          	self.announce ("building '%s' extension" % ext.name)
  
!             # First step: compile the source code to object files.  This
!             # drops the object files in the current directory, regardless
!             # of where the source is (may be a bad thing, but that's how a
!             # Makefile.pre.in-based system does it, so at least there's a
!             # precedent!)
  
              # XXX not honouring 'define_macros' or 'undef_macros' -- the
              # CCompiler API needs to change to accomodate this, and I
--- 368,378 ----
          	self.announce ("building '%s' extension" % ext.name)
  
!             # First, scan the sources for SWIG definition files (.i), run
!             # SWIG on 'em to create .c files, and modify the sources list
!             # accordingly.
!             sources = self.swig_sources(sources)
  
+             # Next, compile the source code to object files.
+ 
              # XXX not honouring 'define_macros' or 'undef_macros' -- the
              # CCompiler API needs to change to accomodate this, and I
***************
*** 429,432 ****
--- 430,501 ----
      # build_extensions ()
  
+ 
+     def swig_sources (self, sources):
+ 
+         """Walk the list of source files in 'sources', looking for SWIG
+         interface (.i) files.  Run SWIG on all that are found, and
+         return a modified 'sources' list with SWIG source files replaced
+         by the generated C (or C++) files.
+         """
+ 
+         new_sources = []
+         swig_sources = []
+         swig_targets = {}
+ 
+         # XXX this drops generated C files into the source tree, which
+         # is fine for developers who want to distribute the generated
+         # source -- but there should be an option to put SWIG output in
+         # the temp dir.
+ 
+         for source in sources:
+             (base, ext) = os.path.splitext(source)
+             if ext in self.swig_ext():
+                 new_sources.append(base + ".c") # umm, what if it's C++?
+                 swig_files.append(source)
+                 swig_targets[source] = new_sources[-1]
+             else:
+                 new_sources.append(source)
+ 
+         if not swig_files:
+             return new_sources
+ 
+         swig = self.find_swig()
+         swig_cmd = [swig, "-python", "-dnone", "-ISWIG"] # again, C++?!?
+ 
+         for source in swig_sources:
+             self.announce ("swigging %s to %s" % (src, obj))
+             self.spawn(swig_cmd + ["-o", swig_targets[source], source])
+ 
+         return new_sources
+ 
+     # swig_sources ()
+ 
+     def find_swig (self):
+         """Return the name of the SWIG executable.  On Unix, this is
+         just "swig" -- it should be in the PATH.  Tries a bit harder on
+         Windows.
+         """
+ 
+         if os.name == "posix":
+             return "swig"
+         elif os.name == "nt":
+ 
+             # Look for SWIG in its standard installation directory on
+             # Windows (or so I presume!).  If we find it there, great;
+             # if not, act like Unix and assume it's in the PATH.
+             for vers in ("1.3", "1.2", "1.1"):
+                 fn = os.path.join("c:\\swig%s" % vers, "swig.exe")
+                 if os.path.isfile (fn):
+                     return fn
+             else:
+                 return "swig.exe"
+ 
+         else:
+             raise DistutilsPlatformError, \
+                   ("I don't know how to find (much less run) SWIG "
+                    "on platform '%s'") % os.name
+ 
+     # find_swig ()
+     
  
      # -- Hooks ---------------------------------------------------------