# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2016-11-10 21:07:24
# Node ID 270b077d434ba4888bf693c7230179150e9c2b6c
# Parent  1156ec81f70907ff843ca30bb81b4ef59b9b7068

run-tests: forward Python USER_BASE from site (issue5425)

We do this so that any linters installed via pip install --user don't
break. See https://docs.python.org/2/library/site.html#site.USER_BASE
for a description of what this nonsense is all about.

An alternative would be to not set HOME, but that'll cause other
problems (see issue2707), or to forward every single path entry from
sys.path in PYTHONPATH (which seems sketchy in its own way).

diff --git a/tests/run-tests.py b/tests/run-tests.py
--- a/tests/run-tests.py
+++ b/tests/run-tests.py
@@ -58,6 +58,11 @@ import signal
 import socket
 import subprocess
 import sys
+try:
+    import sysconfig
+except ImportError:
+    # sysconfig doesn't exist in Python 2.6
+    sysconfig = None
 import tempfile
 import threading
 import time
@@ -818,6 +823,8 @@ class Test(unittest.TestCase):
             offset = '' if i == 0 else '%s' % i
             env["HGPORT%s" % offset] = '%s' % (self._startport + i)
         env = os.environ.copy()
+        if sysconfig is not None:
+            env['PYTHONUSERBASE'] = sysconfig.get_config_var('userbase')
         env['TESTTMP'] = self._testtmp
         env['HOME'] = self._testtmp
         # This number should match portneeded in _getport