mingw: when running in a Windows container, try to rename() harder

It is a known issue that a rename() can fail with an "Access denied"
error at times, when copying followed by deleting the original file
works. Let's just fall back to that behavior.

Signed-off-by: JiSeop Moon <zcube@zcube.kr>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

compat/mingw.c

@@ -2535,6 +2535,13 @@ int mingw_rename(const char *pold, const char *pnew)
 		return 0;
 	gle = GetLastError();
 
+	if (gle == ERROR_ACCESS_DENIED && is_inside_windows_container()) {
+		/* Fall back to copy to destination & remove source */
+		if (CopyFileW(wpold, wpnew, FALSE) && !mingw_unlink(pold))
+			return 0;
+		gle = GetLastError();
+	}
+
 	/* revert file attributes on failure */
 	if (attrs != INVALID_FILE_ATTRIBUTES)
 		SetFileAttributesW(wpnew, attrs);