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