Add cache dir .gitignore only when we create the cache dir

scop · scop · commit 90013ebb31be · 2019-12-23T16:47:04.000+02:00
diff --git a/mypy/build.py b/mypy/build.py
@@ -601,8 +601,10 @@ def __init__(self, data_dir: str,
                               and not has_reporters)
         self.fscache = fscache
         self.find_module_cache = FindModuleCache(self.search_paths, self.fscache, self.options)
+        # add ignore-all .gitignore to cache dir if we created it
+        cache_dir_existed = os.path.isdir(options.cache_dir)
         self.metastore = create_metastore(options)
-        if fscache.isdir(options.cache_dir):
+        if not cache_dir_existed and os.path.isdir(options.cache_dir):
             gitignore = os.path.join(options.cache_dir, ".gitignore")
             if not fscache.isfile(gitignore):
                 with open(gitignore, "w") as f:
