From 594accf0cfec19d7cccd1147d48fbeebf523ecb5 Mon Sep 17 00:00:00 2001
From: PrajwalM2212 <prajwalmmath@gmail.com>
Date: Fri, 14 Feb 2020 21:31:50 +0530
Subject: [PATCH] py_info.py: Discover python interpreter in a case insensitive
 manner

Closes https://github.com/pypa/virtualenv/issues/1624
---
 docs/changelog/1624.bugfix.rst               | 1 +
 src/virtualenv/discovery/py_info.py          | 2 +-
 tests/unit/discovery/py_info/test_py_info.py | 6 +++++-
 3 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 docs/changelog/1624.bugfix.rst

diff --git a/docs/changelog/1624.bugfix.rst b/docs/changelog/1624.bugfix.rst
new file mode 100644
index 000000000..d1f4876cd
--- /dev/null
+++ b/docs/changelog/1624.bugfix.rst
@@ -0,0 +1 @@
+Discover python interpreter in a case insensitive manner - by :user:`PrajwalM2212`
diff --git a/src/virtualenv/discovery/py_info.py b/src/virtualenv/discovery/py_info.py
index 8e520ba0d..c897cf178 100644
--- a/src/virtualenv/discovery/py_info.py
+++ b/src/virtualenv/discovery/py_info.py
@@ -237,7 +237,7 @@ def satisfies(self, spec, impl_must_match):
                 return False
 
         if impl_must_match:
-            if spec.implementation is not None and spec.implementation != self.implementation:
+            if spec.implementation is not None and spec.implementation.lower() != self.implementation.lower():
                 return False
 
         if spec.architecture is not None and spec.architecture != self.architecture:
diff --git a/tests/unit/discovery/py_info/test_py_info.py b/tests/unit/discovery/py_info/test_py_info.py
index b5272e473..dd898897e 100644
--- a/tests/unit/discovery/py_info/test_py_info.py
+++ b/tests/unit/discovery/py_info/test_py_info.py
@@ -56,7 +56,11 @@ def test_bad_exe_py_info_no_raise(tmp_path, caplog, capsys):
         list(
             "{}{}{}".format(impl, ".".join(str(i) for i in ver), arch)
             for impl, ver, arch in itertools.product(
-                ([CURRENT.implementation] + (["python"] if CURRENT.implementation == "CPython" else [])),
+                (
+                    [CURRENT.implementation]
+                    + (["python"] if CURRENT.implementation == "CPython" else [])
+                    + (["cpython"] if CURRENT.implementation == "CPython" else [])
+                ),
                 [sys.version_info[0 : i + 1] for i in range(3)],
                 ["", "-{}".format(CURRENT.architecture)],
             )