pkgs/development/python-modules/virtualenv/0001-Check-base_prefix-and-base_exec_prefix-for-Python-2.patch

   1 From 21563405d6e2348ee457187f7fb61beb102bb367 Mon Sep 17 00:00:00 2001
   2 From: Frederik Rietdijk <fridh@fridh.nl>
   3 Date: Sun, 24 May 2020 09:33:13 +0200
   4 Subject: [PATCH] Check base_prefix and base_exec_prefix for Python 2
   5
   6 This is a Nixpkgs-specific change so it can support virtualenvs from Nix envs.
   7 ---
   8  src/virtualenv/discovery/py_info.py | 8 ++++++--
   9  1 file changed, 6 insertions(+), 2 deletions(-)
  10
  11 diff --git a/src/virtualenv/discovery/py_info.py b/src/virtualenv/discovery/py_info.py
  12 index 6f12128..74e9218 100644
  13 --- a/src/virtualenv/discovery/py_info.py
  14 +++ b/src/virtualenv/discovery/py_info.py
  15 @@ -51,13 +51,17 @@ class PythonInfo(object):
  16          self.version = u(sys.version)
  17          self.os = u(os.name)
  18
  19 +        config_vars = {} if sys.version_info.major is not 2 else sysconfig._CONFIG_VARS
  20 +        base_prefix = config_vars.get("prefix")
  21 +        base_exec_prefix = config_vars.get("exec_prefix")
  22 +
  23          # information about the prefix - determines python home
  24          self.prefix = u(abs_path(getattr(sys, "prefix", None)))  # prefix we think
  25 -        self.base_prefix = u(abs_path(getattr(sys, "base_prefix", None)))  # venv
  26 +        self.base_prefix = u(abs_path(getattr(sys, "base_prefix", base_prefix)))  # venv
  27          self.real_prefix = u(abs_path(getattr(sys, "real_prefix", None)))  # old virtualenv
  28
  29          # information about the exec prefix - dynamic stdlib modules
  30 -        self.base_exec_prefix = u(abs_path(getattr(sys, "base_exec_prefix", None)))
  31 +        self.base_exec_prefix = u(abs_path(getattr(sys, "base_exec_prefix", base_exec_prefix)))
  32          self.exec_prefix = u(abs_path(getattr(sys, "exec_prefix", None)))
  33
  34          self.executable = u(abs_path(sys.executable))  # the executable we were invoked via
  35 --
  36 2.25.1
  37