Add custom deprecation warning classes

`DeprecationWarning` is not visible by default in the latest versions of
CPython, so this switches the deprecation warnings in setuptools and
pkg_resources over to custom classes derived from `Warning` instead.

Fixes issue github issue #159

Co-authored-by: Junhan Huang <robin.j.huang@gmail.com>
Co-authored-by: Marton Pono <marci93@gmail.com>

2 files changed, 17 insertions, 6 deletions

diff --git a/setuptools/command/easy_install.py b/setuptools/command/easy_install.py
index c670a16e..06c98271 100644
--- a/setuptools/command/easy_install.py
+++ b/setuptools/command/easy_install.py
@@ -40,8 +40,11 @@ import subprocess
 import shlex
 import io
 
+
 from sysconfig import get_config_vars, get_path
 
+from setuptools import SetuptoolsDeprecationWarning
+
 from setuptools.extern import six
 from setuptools.extern.six.moves import configparser, map
 
@@ -2077,7 +2080,7 @@ class ScriptWriter:
     @classmethod
     def get_script_args(cls, dist, executable=None, wininst=False):
         # for backward compatibility
-        warnings.warn("Use get_args", DeprecationWarning)
+        warnings.warn("Use get_args", EasyInstallDeprecationWarning)
         writer = (WindowsScriptWriter if wininst else ScriptWriter).best()
         header = cls.get_script_header("", executable, wininst)
         return writer.get_args(dist, header)
@@ -2085,7 +2088,7 @@ class ScriptWriter:
     @classmethod
     def get_script_header(cls, script_text, executable=None, wininst=False):
         # for backward compatibility
-        warnings.warn("Use get_header", DeprecationWarning, stacklevel=2)
+        warnings.warn("Use get_header", EasyInstallDeprecationWarning, stacklevel=2)
         if wininst:
             executable = "python.exe"
         return cls.get_header(script_text, executable)
@@ -2120,7 +2123,7 @@ class ScriptWriter:
     @classmethod
     def get_writer(cls, force_windows):
         # for backward compatibility
-        warnings.warn("Use best", DeprecationWarning)
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
         return WindowsScriptWriter.best() if force_windows else cls.best()
 
     @classmethod
@@ -2152,7 +2155,7 @@ class WindowsScriptWriter(ScriptWriter):
     @classmethod
     def get_writer(cls):
         # for backward compatibility
-        warnings.warn("Use best", DeprecationWarning)
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
         return cls.best()
 
     @classmethod
@@ -2333,3 +2336,7 @@ def _patch_usage():
         yield
     finally:
         distutils.core.gen_usage = saved
+
+class EasyInstallDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in EasyInstall in SetupTools. Not ignored by default, unlike DeprecationWarning."""
+    
diff --git a/setuptools/command/egg_info.py b/setuptools/command/egg_info.py
index bd116e1f..e1022d31 100644
--- a/setuptools/command/egg_info.py
+++ b/setuptools/command/egg_info.py
@@ -31,7 +31,7 @@ import setuptools.unicode_utils as unicode_utils
 from setuptools.glob import glob
 
 from setuptools.extern import packaging
-
+from setuptools import SetuptoolsDeprecationWarning
 
 def translate_pattern(glob):
     """
@@ -696,7 +696,7 @@ def get_pkg_info_revision():
     Get a -r### off of PKG-INFO Version in case this is an sdist of
     a subversion revision.
     """
-    warnings.warn("get_pkg_info_revision is deprecated.", DeprecationWarning)
+    warnings.warn("get_pkg_info_revision is deprecated.", EggInfoDeprecationWarning)
     if os.path.exists('PKG-INFO'):
         with io.open('PKG-INFO') as f:
             for line in f:
@@ -704,3 +704,7 @@ def get_pkg_info_revision():
                 if match:
                     return int(match.group(1))
     return 0
+
+
+class EggInfoDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in eggInfo in setupTools. Not ignored by default, unlike DeprecationWarning."""