From: Bob Halley <halley@dnspython.org>
Date: Tue, 26 Oct 2021 01:04:56 +0000 (-0700)
Subject: Distinguish between the two causes of NoResolverConfiguration in the exception string
X-Git-Tag: v2.2.0rc1~46
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ef9826268ee9b2112fe0f8f26eb90496de5d4158;p=thirdparty%2Fdnspython.git

Distinguish between the two causes of NoResolverConfiguration in the exception string
---

diff --git a/dns/resolver.py b/dns/resolver.py
index 08e9e617..108dd52d 100644
--- a/dns/resolver.py
+++ b/dns/resolver.py
@@ -807,7 +807,7 @@ class BaseResolver:
                     f = stack.enter_context(open(f))
                 except OSError:
                     # /etc/resolv.conf doesn't exist, can't be read, etc.
-                    raise NoResolverConfiguration
+                    raise NoResolverConfiguration(f'cannot open {f}')
 
             for l in f:
                 if len(l) == 0 or l[0] == '#' or l[0] == ';':
@@ -848,7 +848,7 @@ class BaseResolver:
                             except (ValueError, IndexError):
                                 pass
         if len(self.nameservers) == 0:
-            raise NoResolverConfiguration
+            raise NoResolverConfiguration('no nameservers')
 
     def _determine_split_char(self, entry):
         #