Merged PR posit-dev/positron-python#358: use unique cache directories for vendored parso

Merge pull request #358 from posit-dev/fix-parso-cache

use unique cache directories for vendored `parso`
--------------------
Commit message for posit-dev/positron-python@cfdcbb6:

use unique cache directories for vendored `parso`

Addresses #2120.


Authored-by: Wasim Lorgat <[email protected]>
Signed-off-by: Wasim Lorgat <[email protected]>

Author: seeM

extensions/positron-python/scripts/patches/parso.patch

@@ -0,0 +1,17 @@
+We append `-Positron` to the `_VERSION_TAG` so that our cache directories don't overlap with a parso
+installation in the user's environment. The vendored parso has a different import path than the user's,
+so using the same cache can cause unexpected errors.
+
+diff --git a/pythonFiles/positron/_vendor/parso/cache.py b/pythonFiles/positron/_vendor/parso/cache.py
+index 5592a9fdd..98b903aaa 100644
+--- a/pythonFiles/positron/_vendor/parso/cache.py
++++ b/pythonFiles/positron/_vendor/parso/cache.py
+@@ -49,7 +49,7 @@ are regarded as incompatible.
+ - A __slot__ of a class is changed.
+ """
+ 
+-_VERSION_TAG = '%s-%s%s-%s' % (
++_VERSION_TAG = '%s-%s%s-%s-Positron' % (
+     platform.python_implementation(),
+     sys.version_info[0],
+     sys.version_info[1],