Simplified code to always use the subprocess module, since buildout

itself always uses it.

Remive the build directiory before building to make sure we're clean
when we witch Python versions.

dev.py

@@ -19,17 +19,17 @@ buildout egg itself is installed as a develop egg.
 $Id$
 """
 
-import os, sys, urllib2
+import os, shutil, sys, subprocess, urllib2
 
 is_jython = sys.platform.startswith('java')
 
-if is_jython:
-    import subprocess
-
 for d in 'eggs', 'develop-eggs', 'bin':
     if not os.path.exists(d):
         os.mkdir(d)
 
+if os.path.isdir('build'):
+    shutil.rmtree('build')
+
 try:
     import pkg_resources
 except ImportError:
@@ -40,15 +40,10 @@ except ImportError:
 
     import pkg_resources
 
-if is_jython:
-    subprocess.Popen([sys.executable] + ['setup.py', '-q', 'develop', '-m', '-x',
-                        '-d', 'develop-eggs'], 
-                        env = {'PYTHONPATH': os.path.dirname(pkg_resources.__file__)}).wait()
-else:
-    os.spawnle(os.P_WAIT, sys.executable, sys.executable, 'setup.py',
-               '-q', 'develop', '-m', '-x', '-d', 'develop-eggs',
-               {'PYTHONPATH': os.path.dirname(pkg_resources.__file__)},
-               )
+subprocess.Popen(
+    [sys.executable] +
+    ['setup.py', '-q', 'develop', '-m', '-x', '-d', 'develop-eggs'],
+    env = {'PYTHONPATH': os.path.dirname(pkg_resources.__file__)}).wait()
 
 pkg_resources.working_set.add_entry('src')
 
@@ -61,6 +56,5 @@ bin_buildout = os.path.join('bin', 'buildout')
 if is_jython:
     # Jython needs the script to be called twice via sys.executable
     assert subprocess.Popen([sys.executable] + [bin_buildout]).wait() == 0
-    sys.exit(subprocess.Popen([sys.executable] + [bin_buildout]).wait())
-else:
-    sys.exit(os.spawnl(os.P_WAIT, bin_buildout, bin_buildout))
+
+sys.exit(subprocess.Popen([sys.executable] + [bin_buildout]).wait())