[PATCH] modify blends_prospective_gatherer.py: check if dpkg-parsechangelog exists

[Akshita Jha <zenith158@gmail.com>]

---
 udd/blends_prospective_gatherer.py | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/udd/blends_prospective_gatherer.py b/udd/blends_prospective_gatherer.py
index f8cb64a..3594e1a 100644
--- a/udd/blends_prospective_gatherer.py
+++ b/udd/blends_prospective_gatherer.py
@@ -140,11 +140,15 @@ class blends_prospective_gatherer(gatherer):
     	vcs.close()
 
         # Read output of dpkg-parsechangelog
-        p = Popen("LC_ALL=C dpkg-parsechangelog -l"+upath+'/'+source+'.changelog', shell=True, bufsize=4096,
-          stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
-        errstring = p.stderr.read()
-        if errstring != '':
-          self.log.warning("Error parsing changelog of '%s' of %s\n %s:" % (source, sprosp['blend'], errstring))
+	if exists('/usr/bin/dpkg-parsechangelog'):
+          p = Popen("LC_ALL=C dpkg-parsechangelog -l"+upath+'/'+source+'.changelog', shell=True, bufsize=4096,
+          	stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
+          errstring = p.stderr.read()
+          if errstring != '':
+            self.log.warning("Error parsing changelog of '%s' of %s\n %s:" % (source, sprosp['blend'], errstring))
+	else:
+	  self.log.warning("dpkg-parsechangelog file does not exist")
+
         for stanza in deb822.Sources.iter_paragraphs(p.stdout):
           if source != stanza['source']:
             print >>stderr, "Something is wrong with changelog data of package '%s' of %s.  Changelog says source = '%s'." % (source, sprosp['blend'], stanza['source'])
-- 
1.9.1