From b2ee211b5ad84b62738ac0997b73bf6ee9a74d06 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=C5=81ukasz=20Langa?= <lukasz@langa.pl>
Date: Wed, 12 May 2021 21:47:32 +0200
Subject: [PATCH] Click 8.0 renamed its "die on LANG=C" function so we need to
 look for that one too (#2227)

---
 CHANGES.md            | 6 ++++++
 mypy.ini              | 6 ++++--
 src/black/__init__.py | 6 ++++--
 3 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/CHANGES.md b/CHANGES.md
index 38eef52..becd621 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Change Log
 
+## Unreleased
+
+### _Black_
+
+- Restored compatibility with Click 8.0 on Python 3.6 when LANG=C used (#2227)
+
 ## 21.5b1
 
 ### _Black_
diff --git a/mypy.ini b/mypy.ini
index 589fbf6..ae7be5e 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -33,5 +33,7 @@ cache_dir=/dev/null
 
 [mypy-aiohttp.*]
 follow_imports=skip
-[mypy-_version]
-follow_imports=skip
+[mypy-black]
+# The following is because of `patch_click()`. Remove when
+# we drop Python 3.6 support.
+warn_unused_ignores=False
diff --git a/src/black/__init__.py b/src/black/__init__.py
index c61bc8c..f46b866 100644
--- a/src/black/__init__.py
+++ b/src/black/__init__.py
@@ -1029,7 +1029,7 @@ def nullcontext() -> Iterator[None]:
 
 
 def patch_click() -> None:
-    """Make Click not crash.
+    """Make Click not crash on Python 3.6 with LANG=C.
 
     On certain misconfigured environments, Python 3 selects the ASCII encoding as the
     default which restricts paths that it can access during the lifetime of the
@@ -1047,7 +1047,9 @@ def patch_click() -> None:
 
     for module in (core, _unicodefun):
         if hasattr(module, "_verify_python3_env"):
-            module._verify_python3_env = lambda: None
+            module._verify_python3_env = lambda: None  # type: ignore
+        if hasattr(module, "_verify_python_env"):
+            module._verify_python_env = lambda: None  # type: ignore
 
 
 def patched_main() -> None:
-- 
2.39.5