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Lib/site-packages/virtualenv/activation/xonsh/__init__.py

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+from __future__ import absolute_import, unicode_literals
+
+from virtualenv.util.path import Path
+
+from ..via_template import ViaTemplateActivator
+
+
+class XonshActivator(ViaTemplateActivator):
+    def templates(self):
+        yield Path("activate.xsh")
+
+    @classmethod
+    def supports(cls, interpreter):
+        return interpreter.version_info >= (3, 5)

Lib/site-packages/virtualenv/activation/xonsh/activate.xsh

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+"""Xonsh activate script for virtualenv"""
+from xonsh.tools import get_sep as _get_sep
+
+def _deactivate(args):
+    if "pydoc" in aliases:
+        del aliases["pydoc"]
+
+    if ${...}.get("_OLD_VIRTUAL_PATH", ""):
+        $PATH = $_OLD_VIRTUAL_PATH
+        del $_OLD_VIRTUAL_PATH
+
+    if ${...}.get("_OLD_VIRTUAL_PYTHONHOME", ""):
+        $PYTHONHOME = $_OLD_VIRTUAL_PYTHONHOME
+        del $_OLD_VIRTUAL_PYTHONHOME
+
+    if "VIRTUAL_ENV" in ${...}:
+        del $VIRTUAL_ENV
+
+    if "VIRTUAL_ENV_PROMPT" in ${...}:
+        del $VIRTUAL_ENV_PROMPT
+
+    if "nondestructive" not in args:
+        # Self destruct!
+        del aliases["deactivate"]
+
+
+# unset irrelevant variables
+_deactivate(["nondestructive"])
+aliases["deactivate"] = _deactivate
+
+$VIRTUAL_ENV = r"__VIRTUAL_ENV__"
+
+$_OLD_VIRTUAL_PATH = $PATH
+$PATH = $PATH[:]
+$PATH.add($VIRTUAL_ENV + _get_sep() + "__BIN_NAME__", front=True, replace=True)
+
+if ${...}.get("PYTHONHOME", ""):
+    # unset PYTHONHOME if set
+    $_OLD_VIRTUAL_PYTHONHOME = $PYTHONHOME
+    del $PYTHONHOME
+
+$VIRTUAL_ENV_PROMPT = "__VIRTUAL_PROMPT__"
+if not $VIRTUAL_ENV_PROMPT:
+    del $VIRTUAL_ENV_PROMPT
+
+aliases["pydoc"] = ["python", "-m", "pydoc"]