feat(changelog): add support for multiline BREAKING paragraph

Closes #346

Author: woile

commitizen/changelog.py

@@ -76,6 +76,8 @@ def generate_tree_from_commits(
 ) -> Iterable[Dict]:
     pat = re.compile(changelog_pattern)
     map_pat = re.compile(commit_parser, re.MULTILINE)
+    body_map_pat = re.compile(commit_parser, re.MULTILINE | re.DOTALL)
+
     # Check if the latest commit is not tagged
     latest_commit = commits[0]
     current_tag: Optional[GitTag] = get_commit_tag(latest_commit, tags)
@@ -110,8 +112,9 @@ def generate_tree_from_commits(
         if not matches:
             continue
 
+        # Process subject from commit message
         message = map_pat.match(commit.message)
-        message_body = map_pat.search(commit.body)
+
         if message:
             parsed_message: Dict = message.groupdict()
             # change_type becomes optional by providing None
@@ -122,8 +125,15 @@ def generate_tree_from_commits(
             if changelog_message_builder_hook:
                 parsed_message = changelog_message_builder_hook(parsed_message, commit)
             changes[change_type].append(parsed_message)
-        if message_body:
+
+        # Process body from commit message
+        body_parts = commit.body.split("\n\n")
+        for body_part in body_parts:
+            message_body = body_map_pat.match(body_part)
+            if not message_body:
+                continue
             parsed_message_body: Dict = message_body.groupdict()
+
             change_type = parsed_message_body.pop("change_type", None)
             changes[change_type].append(parsed_message_body)
 

tests/commands/test_changelog_command.py

@@ -386,6 +386,30 @@ def test_breaking_change_content_v1(mocker, capsys):
     )
 
 
+@pytest.mark.usefixtures("tmp_commitizen_project")
+def test_breaking_change_content_v1_multiline(mocker, capsys):
+    commit_message = (
+        "feat(users): email pattern corrected\n\n"
+        "body content\n\n"
+        "BREAKING CHANGE: migrate by renaming user to users.\n"
+        "and then connect the thingy with the other thingy\n\n"
+        "footer content"
+    )
+    create_file_and_commit(commit_message)
+    testargs = ["cz", "changelog", "--dry-run"]
+    mocker.patch.object(sys, "argv", testargs)
+    with pytest.raises(DryRunExit):
+        cli.main()
+    out, _ = capsys.readouterr()
+
+    assert out == (
+        "## Unreleased\n\n### Feat\n\n- **users**: email pattern corrected\n\n"
+        "### BREAKING CHANGE\n\n- migrate by renaming user to users.\n"
+        "and then connect the thingy with the other thingy"
+        "\n\n"
+    )
+
+
 @pytest.mark.usefixtures("tmp_commitizen_project")
 def test_changelog_config_flag_increment(mocker, changelog_path, config_path):