Merge pull request #903 from qwcode/home_lib

improve method for getting home scheme purelib

pip/backwardcompat/__init__.py

@@ -118,15 +118,6 @@ def product(*args, **kwds):
         yield tuple(prod)
 
 
-def home_lib(home):
-    """Return the lib dir under the 'home' installation scheme"""
-    if hasattr(sys, 'pypy_version_info'):
-        lib = 'site-packages'
-    else:
-        lib = os.path.join('lib', 'python')
-    return os.path.join(home, lib)
-
-
 ## only >=py32 has ssl.match_hostname and ssl.CertificateError
 try:
     from ssl import match_hostname, CertificateError

pip/commands/install.py

@@ -4,11 +4,10 @@
 import shutil
 from pip.req import InstallRequirement, RequirementSet, parse_requirements
 from pip.log import logger
-from pip.locations import src_prefix, virtualenv_no_global
+from pip.locations import src_prefix, virtualenv_no_global, distutils_scheme
 from pip.basecommand import Command
 from pip.index import PackageFinder
 from pip.exceptions import InstallationError, CommandError
-from pip.backwardcompat import home_lib
 from pip import cmdoptions
 
 
@@ -256,7 +255,7 @@ def run(self, options, args):
         if options.target_dir:
             if not os.path.exists(options.target_dir):
                 os.makedirs(options.target_dir)
-            lib_dir = home_lib(temp_target_dir)
+            lib_dir = distutils_scheme('', home=temp_target_dir)['purelib']
             for item in os.listdir(lib_dir):
                 shutil.move(
                     os.path.join(lib_dir, item),