Make OrgNode tags stable sorted to find new entries for incremental updates

- Having Tags as sets was returning them in a different order
  everytime
- This resulted in spuriously identifying existing entries as new
  because their tags ordering changed
- Converting tags to list fixes the issue and identifies updated new
  entries for incremental update correctly

src/processor/org_mode/orgnode.py

@@ -64,7 +64,7 @@ def makelist(filename):
    level         = 0
    heading       = ""
    bodytext      = ""
-   tags          = set()      # set of all tags in headline
+   tags          = list()      # set of all tags in headline
    closed_date   = ''
    sched_date    = ''
    deadline_date = ''
@@ -98,14 +98,14 @@ def makelist(filename):
           level = hdng.group(1)
           heading =  hdng.group(2)
           bodytext = ""
-          tags = set()       # set of all tags in headline
+          tags = list()       # set of all tags in headline
           tagsrch = re.search(r'(.*?)\s*:([a-zA-Z0-9].*?):$',heading)
           if tagsrch:
               heading = tagsrch.group(1)
               parsedtags = tagsrch.group(2)
               if parsedtags:
                  for parsedtag in parsedtags.split(':'):
-                    if parsedtag != '': tags.add(parsedtag)
+                    if parsedtag != '': tags.append(parsedtag)
        else:      # we are processing a non-heading line
            if line[:10] == '#+SEQ_TODO':
               kwlist = re.findall(r'([A-Z]+)\(', line)
@@ -217,7 +217,7 @@ class Orgnode(object):
         self.level = len(level)
         self.headline = headline
         self.body = body
-        self.tags = set(tags)     # All tags in the headline
+        self.tags = tags          # All tags in the headline
         self.todo = ""
         self.prty = ""            # empty of A, B or C
         self.scheduled = ""       # Scheduled date
@@ -270,8 +270,8 @@ class Orgnode(object):
 
     def Tags(self):
         """
-        Returns the set of all tags
-        For example, :HOME:COMPUTER: would return {'HOME', 'COMPUTER'}
+        Returns the list of all tags
+        For example, :HOME:COMPUTER: would return ['HOME', 'COMPUTER']
         """
         return self.tags
 
@@ -287,7 +287,7 @@ class Orgnode(object):
         """
         Store all the tags found in the headline.
         """
-        self.tags = set(newtags)
+        self.tags = newtags
 
     def Todo(self):
         """

tests/test_orgnode.py

@@ -23,7 +23,7 @@ Body Line 1'''
     # Assert
     assert len(entries) == 1
     assert entries[0].Heading() == "Heading"
-    assert entries[0].Tags() == set()
+    assert entries[0].Tags() == list()
     assert entries[0].Body() == "Body Line 1"
     assert entries[0].Priority() == ""
     assert entries[0].Property("ID") == ""
@@ -57,7 +57,7 @@ Body Line 2'''
     assert len(entries) == 1
     assert entries[0].Heading() == "Heading"
     assert entries[0].Todo() == "DONE"
-    assert entries[0].Tags() == {"Tag1", "TAG2", "tag3"}
+    assert entries[0].Tags() == ["Tag1", "TAG2", "tag3"]
     assert entries[0].Body() == "- Clocked Log 1\nBody Line 1\nBody Line 2"
     assert entries[0].Priority() == "A"
     assert entries[0].Property("ID") == "id:123-456-789-4234-1231"
@@ -158,7 +158,7 @@ Body 2
     for index, entry in enumerate(entries):
         assert entry.Heading() == f"Heading{index+1}"
         assert entry.Todo() == "FAILED" if index == 0 else "CANCELLED"
-        assert entry.Tags() == {f"tag{index+1}"}
+        assert entry.Tags() == [f"tag{index+1}"]
         assert entry.Body() == f"- Clocked Log {index+1}\nBody {index+1}\n\n"
         assert entry.Priority() == "A"
         assert entry.Property("ID") == f"id:123-456-789-4234-000{index+1}"