pyrox.dev
1Without this patch `virtualenv --python=python2.7 .` fails with an
2error because it notices that the python readline.so is not in the
3same path as python2.7. I assume this is to avoid copying the wrong
4file on systems where it is possible to find incompatible libraries by
5accident. Adding "/nix/store" to the prefix fixes this problem.
6
7A sitecustomize.py is created in the virtualenv which makes libraries
8from the python specified by the --python argument available to the
9virtualenv. For example, this makes readline and sqlite3 available
10when a wrapped python is specified. If no --python argument is passed,
11it will only add the path to the python used when building
12`virtualenv`, which is the unwrapped python, so sqlite3 won't be
13available.
14
15
16diff --git a/virtualenv.py b/virtualenv.py
17index d3e76a7..cb307fa 100755
18--- a/virtualenv.py
19+++ b/virtualenv.py
20@@ -1051,17 +1051,7 @@ def path_locations(home_dir):
21
22
23 def change_prefix(filename, dst_prefix):
24- prefixes = [sys.prefix]
25-
26- if is_darwin:
27- prefixes.extend((
28- os.path.join("/Library/Python", sys.version[:3], "site-packages"),
29- os.path.join(sys.prefix, "Extras", "lib", "python"),
30- os.path.join("~", "Library", "Python", sys.version[:3], "site-packages"),
31- # Python 2.6 no-frameworks
32- os.path.join("~", ".local", "lib","python", sys.version[:3], "site-packages"),
33- # System Python 2.7 on OSX Mountain Lion
34- os.path.join("~", "Library", "Python", sys.version[:3], "lib", "python", "site-packages")))
35+ prefixes = ["/nix/store", sys.prefix]
36
37 if hasattr(sys, 'real_prefix'):
38 prefixes.append(sys.real_prefix)
39@@ -1078,6 +1068,8 @@ def change_prefix(filename, dst_prefix):
40 if src_prefix != os.sep: # sys.prefix == "/"
41 assert relpath[0] == os.sep
42 relpath = relpath[1:]
43+ if src_prefix == "/nix/store":
44+ relpath = "/".join(relpath.split("/")[1:])
45 return join(dst_prefix, relpath)
46 assert False, "Filename %s does not start with any of these prefixes: %s" % \
47 (filename, prefixes)
48@@ -1190,6 +1182,11 @@ def install_python(home_dir, lib_dir, inc_dir, bin_dir, site_packages, clear, sy
49 site_filename_dst = change_prefix(site_filename, home_dir)
50 site_dir = os.path.dirname(site_filename_dst)
51 writefile(site_filename_dst, SITE_PY)
52+ wrapper_path = join(prefix, "lib", py_version, "site-packages")
53+ writefile(
54+ join(site_dir, 'sitecustomize.py',),
55+ "import sys; sys.path.append('%s')" % wrapper_path
56+ )
57 writefile(join(site_dir, 'orig-prefix.txt'), prefix)
58 site_packages_filename = join(site_dir, 'no-global-site-packages.txt')
59 if not site_packages: