new uranium version - more robust virtualenv.

setup.py

@@ -14,7 +14,7 @@
 ]
 
 setup(name='uranium',
-      version='0.2.32b',
+      version='0.2.34b',
       description='a build system for python',
       long_description=open('README.rst').read(),
       author='Yusuke Tsutsumi',

uranium/lib/sandbox/venv/utils.py

@@ -1,6 +1,8 @@
 import logging
 import os
+import subprocess
 import sys
+import virtualenv
 from virtualenv import create_environment
 
 LOGGER = logging.getLogger(__name__)
@@ -13,9 +15,14 @@ def install_virtualenv(install_dir):
     if is_virtualenv(install_dir):
         return
 
-    create_environment(install_dir, no_setuptools=False,
-                       no_pip=True, site_packages=False,
-                       symlink=False)
+    subprocess.call([
+        sys.executable,
+        virtualenv.__file__.rstrip("c"),
+        "--no-site-packages",
+        "--no-pip",
+        "--always-copy",
+        install_dir
+    ])
 
 VIRTUALENV_FILES = {
     'activate file': os.path.join('bin', 'activate')

uranium/scripts/uranium

@@ -18,13 +18,13 @@ def get_cached_standalone():
     if not os.path.isfile(CACHED_URANIUM_STANDALONE):
         return None
     with open(CACHED_URANIUM_STANDALONE) as fh:
-        return fh.read().decode("UTF-8")
+        return fh.read()
 
 
 def store_cached_standalone(body):
     if not os.path.exists(CACHE_DIRECTORY):
         os.makedirs(CACHE_DIRECTORY)
-    with open(CACHED_URANIUM_STANDALONE, "w+") as fh:
+    with open(CACHED_URANIUM_STANDALONE, "wb+") as fh:
         fh.write(body)
 
 cached_standalone = get_cached_standalone()