Stop using the deprecated sha module. Instead use hashlib. Since

hashlib was introduced in 2.5, change the USE_PYTHON setting to require
it.

Feature safe:	yes

www/trac-graphviz/Makefile

@@ -7,7 +7,7 @@
 
 PORTNAME=	${PYDISTUTILS_PKGNAME:S;^Trac;;S;Plugin$;;:L}
 PORTVERSION=	0.7.4
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	www devel graphics python
 MASTER_SITES=	${MASTER_SITE_LOCAL}
 MASTER_SITE_SUBDIR=	brooks
@@ -22,7 +22,7 @@ RUN_DEPENDS+=	${LOCALBASE}/lib/X11/fonts/URW/fonts.dir:${PORTSDIR}/x11-fonts/urw
 		tracd:${PORTSDIR}/www/trac
 BUILD_DEPENDS+=	easy_install:${PORTSDIR}/devel/py-setuptools
 
-USE_PYTHON=	yes
+USE_PYTHON=	2.5+
 NO_BUILD=	yes
 USE_PYDISTUTILS=yes
 PYDISTUTILS_PKGNAME=	graphviz

www/trac-graphviz/files/patch-graphviz_graphviz.py

@@ -3,6 +3,19 @@ $FreeBSD$
 
 --- graphviz/graphviz.py.orig
 +++ graphviz/graphviz.py
+@@ -16,11 +16,11 @@
+ __version__   = '0.7.2'
+ 
+ 
++import hashlib
+ import inspect
+ import locale
+ import os
+ import re
+-import sha
+ import subprocess
+ import sys
+ 
 @@ -59,10 +59,7 @@
                       'c:\\Program Files\\ATT\\Graphviz\\bin',
                       ],
@@ -15,3 +28,12 @@ $FreeBSD$
                       ],
          
          'darwin':   ['/opt/local/bin',
+@@ -312,7 +309,7 @@
+         encoded_cmd = (processor + unicode(self.processor_options)) \
+                 .encode(self.encoding)
+         encoded_content = content.encode(self.encoding)
+-        sha_key  = sha.new(encoded_cmd + encoded_content).hexdigest()
++        sha_key  = hashlib.sha1(encoded_cmd + encoded_content).hexdigest()
+         img_name = '%s.%s.%s' % (sha_key, processor, out_format)
+         # cache: hash.<dot>.<png>
+         img_path = os.path.join(self.cache_dir, img_name)