Fix SHA-1 computation so it is only done for regular

files.

2 files changed, 7 insertions, 1 deletions

diff --git a/summainlib.py b/summainlib.py
index 509bc50..ad6fee0 100644
--- a/summainlib.py
+++ b/summainlib.py
@@ -18,6 +18,7 @@ import grp
 import hashlib
 import os
 import pwd
+import stat
 import time
 import urllib
 
@@ -50,7 +51,8 @@ class FilesystemObject(object):
         self['Username'] = self.lookup_username(stat_result.st_uid)
         self['Gid'] = '%d' % stat_result.st_gid
         self['Group'] = self.lookup_group(stat_result.st_gid)
-        self['Sha-1'] = self.compute_sha1(filename, sha1)
+        if stat.S_ISREG(stat_result.st_mode):
+            self['Sha-1'] = self.compute_sha1(filename, sha1)
 
     def format_time(self, timestamp):
         return time.strftime('%Y-%m-%d %H:%M:%S +0000', 
diff --git a/summainlib_tests.py b/summainlib_tests.py
index a3553ca..cbfb11c 100644
--- a/summainlib_tests.py
+++ b/summainlib_tests.py
@@ -108,3 +108,7 @@ class FilesystemObjectTests(unittest.TestCase):
     def test_formats_sha1_correctly_for_regular_file(self):
         self.assertEqual(self.new('foo')['Sha-1'], 'abc')
 
+    def test_formats_sha1_correctly_for_special_file(self):
+        self.st.st_mode = stat.S_IFDIR | 0755
+        self.assertEqual(self.new('foo')['Sha-1'], '')
+