[python-debian/master] Use the warnings system to report deprecation warnings

[John Wright]

All of the function deprecation warnings were already using this system.
Unfortunately, the warnings for using debian instead of debian_bundle
and debian.deb822 instead of deb822 were just prints to sys.stdout, so
they were not easily filtered.

Closes: #573945
---
 debian/changelog              |    2 ++
 lib/deb822.py                 |    8 ++++----
 lib/debian_bundle/__init__.py |    6 +++---
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/debian/changelog b/debian/changelog
index 4b2534b..79b460a 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -7,6 +7,8 @@ python-debian (0.1.16) UNRELEASED; urgency=low
       apt_pkg is not availble
   * test_deb822.py: Don't test gpg info if debian-keyring is not
     available (Closes: #573934)
+  * Use the warnings system to report deprecation warnings
+    (Closes: #573945)
 
  -- John Wright <jsw at debian.org>  Sun, 14 Mar 2010 05:31:54 -0600
 
diff --git a/lib/deb822.py b/lib/deb822.py
index 6dc74ec..cdf5bdc 100644
--- a/lib/deb822.py
+++ b/lib/deb822.py
@@ -1,6 +1,6 @@
-import sys
-print >> sys.stderr, "WARNING:",    \
-        "the 'deb822' top-level module is *DEPRECATED*,",   \
-        "please use 'debian.deb822'"
+import warnings
+
+warnings.warn("please use 'debian.deb822' instead", DeprecationWarning,
+              stacklevel=2)
 
 from debian.deb822 import *
diff --git a/lib/debian_bundle/__init__.py b/lib/debian_bundle/__init__.py
index 05b5b83..13db9db 100644
--- a/lib/debian_bundle/__init__.py
+++ b/lib/debian_bundle/__init__.py
@@ -1,8 +1,8 @@
 import os
-import sys
+import warnings
 
-sys.stderr.write("WARNING: the 'debian_bundle' package is *DEPRECATED*; "
-                 "use the 'debian' package\n")
+warnings.warn("please use 'debian' instead of 'debian_bundle'",
+              DeprecationWarning, stacklevel=2)
 
 # Support "from debian_bundle import foo"
 parent_dir = os.path.dirname(__path__[0])
-- 
1.6.3.3