Update Commit.trailer_list to return tuples.

Author: itsluketwist

git/objects/commit.py

@@ -336,7 +336,7 @@ def stats(self) -> Stats:
         return Stats._list_from_string(self.repo, text)
 
     @property
-    def trailers_list(self) -> List[str]:
+    def trailers_list(self) -> List[Tuple[str, str]]:
         """Get the trailers of the message as a list
 
         Git messages can contain trailer information that are similar to RFC 822
@@ -361,23 +361,29 @@ def trailers_list(self) -> List[str]:
         Returned list will look like this::
 
             [
-                "key1: value1.1",
-                "key1: value1.2",
-                "key2 :    value 2 with inner spaces",
+                ("key1", "value1.1"),
+                ("key1", "value1.2"),
+                ("key2", "value 2 with inner spaces"),
             ]
 
 
         :return:
-            List containing whitespace stripped trailer information.
+            List containing key-value tuples of whitespace stripped trailer information.
         """
         cmd = ["git", "interpret-trailers", "--parse"]
         proc: Git.AutoInterrupt = self.repo.git.execute(cmd, as_process=True, istream=PIPE)  # type: ignore
         trailer: str = proc.communicate(str(self.message).encode())[0].decode()
         trailer = trailer.strip()
-        if trailer:
-            return [t.strip() for t in trailer.split("\n")]
 
-        return []
+        if not trailer:
+            return []
+
+        trailer_list = []
+        for t in trailer.split("\n"):
+            key, val = t.split(":", 1)
+            trailer_list.append((key.strip(), val.strip()))
+
+        return trailer_list
 
     @property
     def trailers_dict(self) -> Dict[str, List[str]]:
@@ -416,9 +422,8 @@ def trailers_dict(self) -> Dict[str, List[str]]:
             Mapping trailer keys to a list of their corresponding values.
         """
         d = defaultdict(list)
-        for trailer in self.trailers_list:
-            key, value = trailer.split(":", 1)
-            d[key.strip()].append(value.strip())
+        for key, val in self.trailers_list:
+            d[key].append(val)
         return dict(d)
 
     @classmethod

test/test_commit.py

@@ -515,9 +515,9 @@ def test_trailers(self):
             commit = copy.copy(self.rorepo.commit("master"))
             commit.message = msg
             assert commit.trailers_list == [
-                f"{KEY_1}: {VALUE_1_1}",
-                f"{KEY_2}: {VALUE_2}",
-                f"{KEY_1}: {VALUE_1_2}",
+                (KEY_1, VALUE_1_1),
+                (KEY_2, VALUE_2),
+                (KEY_1, VALUE_1_2),
             ]
             assert commit.trailers_dict == {
                 KEY_1: [VALUE_1_1, VALUE_1_2],
@@ -543,7 +543,7 @@ def test_trailers(self):
         # check that only the last key value paragraph is evaluated
         commit = copy.copy(self.rorepo.commit("master"))
         commit.message = f"Subject\n\nMultiline\nBody\n\n{KEY_1}: {VALUE_1_1}\n\n{KEY_2}: {VALUE_2}\n"
-        assert commit.trailers_list == [f"{KEY_2}: {VALUE_2}"]
+        assert commit.trailers_list == [(KEY_2, VALUE_2)]
         assert commit.trailers_dict == {KEY_2: [VALUE_2]}
 
     def test_commit_co_authors(self):