make_bag support for multiple metadata with same header

Author: jobyh

bagit.py

@@ -119,6 +119,11 @@ def make_bag(bag_dir, bag_info=None, processes=1):
             headers = bag_info.keys()
             headers.sort()
             for h in headers:
+                # v0.97 support for multiple instances of any meta item.
+                if type(bag_info[h]) == list:
+                    for val in bag_info[h]:
+                        bag_info_txt.write("%s: %s\n"  % (h, val))
+                    continue
                 bag_info_txt.write("%s: %s\n"  % (h, bag_info[h]))
             bag_info_txt.close()
 

test.py

@@ -189,16 +189,11 @@ def test_multiple_oxum_values(self):
         self.assertTrue(bag.validate(fast=True))
 
     def test_multiple_meta_values(self):
-        bag = bagit.make_bag(self.tmpdir)
-        baginfo = open(os.path.join(self.tmpdir, "bag-info.txt"), "a")
-        vals = [7, 4, 8, 6, 8]
-        for val in vals:
-            baginfo.write('Multival-Meta: %s\n' % val)
-        baginfo.close()
-        bag = bagit.Bag(self.tmpdir)
-        meta = bag.info.get('Multival-Meta')
+        baginfo = {"Multival-Meta": [7, 4, 8, 6, 8]}
+        bag = bagit.make_bag(self.tmpdir, baginfo)
+        meta = bag.info.get("Multival-Meta")
         self.assertEqual(type(meta), list)
-        self.assertEqual(len(meta), len(vals))
+        self.assertEqual(len(meta), len(baginfo["Multival-Meta"]))
 
     def test_validate_optional_tagfile(self):
         bag = bagit.make_bag(self.tmpdir)