Feature/ add a tag(--body-length-limit) for command commit

commitizen/cli.py

@@ -164,6 +164,11 @@ def __call__(
                         "type": int,
                         "help": "Set the length limit of the commit message; 0 for no limit.",
                     },
+                    {
+                        "name": ["--body-length-limit"],
+                        "type": int,
+                        "help": "Set the length limit of the commit body. Commit message in body will be rewrapped to this length; 0 for no limit.",
+                    },
                     {
                         "name": ["--"],
                         "action": "store_true",

commitizen/commands/commit.py

@@ -5,6 +5,7 @@
 import shutil
 import subprocess
 import tempfile
+import textwrap
 from typing import TYPE_CHECKING, TypedDict
 
 import questionary
@@ -37,6 +38,7 @@ class CommitArgs(TypedDict, total=False):
     edit: bool
     extra_cli_args: str
     message_length_limit: int
+    body_length_limit: int
     no_retry: bool
     signoff: bool
     write_message_to_file: Path | None
@@ -84,6 +86,7 @@ def _get_message_by_prompt_commit_questions(self) -> str:
 
         message = self.cz.message(answers)
         self._validate_subject_length(message)
+        message = self._rewrap_body(message)
         return message
 
     def _validate_subject_length(self, message: str) -> None:
@@ -102,6 +105,31 @@ def _validate_subject_length(self, message: str) -> None:
                 f"Length of commit message exceeds limit ({len(subject)}/{message_length_limit}), subject: '{subject}'"
             )
 
+    def _rewrap_body(self, message: str) -> str:
+        body_length_limit = self.arguments.get(
+            "body_length_limit", self.config.settings.get("body_length_limit", 0)
+        )
+        # By the contract, body_length_limit is set to 0 for no limit
+        if (
+            body_length_limit is None or body_length_limit <= 0
+        ):  # do nothing for no limit
+            return message
+
+        message_parts = message.split("\n", 2)
+        if len(message_parts) < 3:
+            return message
+
+        # First line is subject, second is blank line, rest is body
+        subject = message_parts[0]
+        blank_line = message_parts[1]
+        body = message_parts[2].strip()
+        body_lines = body.split("\n")
+        wrapped_body_lines = []
+        for line in body_lines:
+            wrapped_body_lines.append(textwrap.fill(line, width=body_length_limit))
+        wrapped_body = "\n".join(wrapped_body_lines)
+        return f"{subject}\n{blank_line}\n{wrapped_body}"
+
     def manual_edit(self, message: str) -> str:
         editor = git.get_core_editor()
         if editor is None:

commitizen/defaults.py

@@ -49,6 +49,7 @@ class Settings(TypedDict, total=False):
     legacy_tag_formats: Sequence[str]
     major_version_zero: bool
     message_length_limit: int
+    body_length_limit: int
     name: str
     post_bump_hooks: list[str] | None
     pre_bump_hooks: list[str] | None
@@ -115,6 +116,7 @@ class Settings(TypedDict, total=False):
     "extras": {},
     "breaking_change_exclamation_in_title": False,
     "message_length_limit": 0,  # 0 for no limit
+    "body_length_limit": 0,  # 0 for no limit
 }
 
 MAJOR = "MAJOR"

tests/commands/test_commit_command.py

@@ -365,3 +365,230 @@ def test_commit_command_with_config_message_length_limit(
     success_mock.reset_mock()
     commands.Commit(config, {"message_length_limit": 0})()
     success_mock.assert_called_once()
+
+
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_command_with_body_length_limit_wrapping(
+    config, success_mock: MockType, mocker: MockFixture
+):
+    """Test that long body lines are automatically wrapped to the specified limit."""
+    mocker.patch(
+        "questionary.prompt",
+        return_value={
+            "prefix": "feat",
+            "subject": "add feature",
+            "scope": "",
+            "is_breaking_change": False,
+            "body": "This is a very long line that exceeds 72 characters and should be automatically wrapped by the system to fit within the limit",
+            "footer": "",
+        },
+    )
+
+    commit_mock = mocker.patch(
+        "commitizen.git.commit", return_value=cmd.Command("success", "", b"", b"", 0)
+    )
+
+    # Execute with body_length_limit
+    commands.Commit(config, {"body_length_limit": 72})()
+    success_mock.assert_called_once()
+
+    # Verify wrapping occurred
+    committed_message = commit_mock.call_args[0][0]
+    lines = committed_message.split("\n")
+    assert lines[0] == "feat: add feature"
+    assert lines[1] == ""
+    body_lines = lines[2:]
+    for line in body_lines:
+        if line.strip():
+            assert len(line) <= 72, (
+                f"Line exceeds 72 chars: '{line}' ({len(line)} chars)"
+            )
+
+
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_command_with_body_length_limit_preserves_line_breaks(
+    config, success_mock: MockType, mocker: MockFixture
+):
+    """Test that intentional line breaks (from | character) are preserved."""
+    # Simulate what happens after multiple_line_breaker processes "line1 | line2 | line3"
+    mocker.patch(
+        "questionary.prompt",
+        return_value={
+            "prefix": "feat",
+            "subject": "add feature",
+            "scope": "",
+            "is_breaking_change": False,
+            "body": "Line1 that is very long and exceeds the limit\nLine2 that is very long and exceeds the limit\nLine3 that is very long and exceeds the limit",
+            "footer": "",
+        },
+    )
+
+    commit_mock = mocker.patch(
+        "commitizen.git.commit", return_value=cmd.Command("success", "", b"", b"", 0)
+    )
+
+    commands.Commit(config, {"body_length_limit": 45})()
+    success_mock.assert_called_once()
+
+    committed_message = commit_mock.call_args[0][0]
+    lines = committed_message.split("\n")
+
+    # Should have a subject, a blank line
+    assert lines[0] == "feat: add feature"
+    assert lines[1] == ""
+    # Each original line should be wrapped separately, preserving the line breaks
+    body_lines = lines[2:]
+    # All lines should be <= 45 chars
+    for line in body_lines:
+        if line.strip():
+            assert len(line) == 45, (
+                f"Line's length is not 45 chars: '{line}' ({len(line)} chars)"
+            )
+
+
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_command_with_body_length_limit_disabled(
+    config, success_mock: MockType, mocker: MockFixture
+):
+    """Test that body_length_limit = 0 disables wrapping."""
+    long_body = "This is a very long line that exceeds 72 characters and should NOT be wrapped when body_length_limit is set to 0"
+
+    mocker.patch(
+        "questionary.prompt",
+        return_value={
+            "prefix": "feat",
+            "subject": "add feature",
+            "scope": "",
+            "is_breaking_change": False,
+            "body": long_body,
+            "footer": "",
+        },
+    )
+
+    commit_mock = mocker.patch(
+        "commitizen.git.commit", return_value=cmd.Command("success", "", b"", b"", 0)
+    )
+
+    # Execute with body_length_limit = 0 (disabled)
+    commands.Commit(config, {"body_length_limit": 0})()
+
+    success_mock.assert_called_once()
+
+    # Get the actual commit message
+    committed_message = commit_mock.call_args[0][0]
+
+    # Verify the body was NOT wrapped (should contain the original long line)
+    assert long_body in committed_message, "Body should not be wrapped when limit is 0"
+
+
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_command_with_body_length_limit_from_config(
+    config, success_mock: MockType, mocker: MockFixture
+):
+    """Test that body_length_limit can be set via config."""
+    mocker.patch(
+        "questionary.prompt",
+        return_value={
+            "prefix": "feat",
+            "subject": "add feature",
+            "scope": "",
+            "is_breaking_change": False,
+            "body": "This is a very long line that exceeds 50 characters and should be wrapped",
+            "footer": "",
+        },
+    )
+
+    commit_mock = mocker.patch(
+        "commitizen.git.commit", return_value=cmd.Command("success", "", b"", b"", 0)
+    )
+
+    # Set body_length_limit in config
+    config.settings["body_length_limit"] = 50
+
+    commands.Commit(config, {})()
+
+    success_mock.assert_called_once()
+
+    # Get the actual commit message
+    committed_message = commit_mock.call_args[0][0]
+
+    # Verify all body lines are within the limit
+    lines = committed_message.split("\n")
+    body_lines = lines[2:]
+    for line in body_lines:
+        if line.strip():
+            assert len(line) <= 50, (
+                f"Line exceeds 50 chars: '{line}' ({len(line)} chars)"
+            )
+
+
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_command_body_length_limit_cli_overrides_config(
+    config, success_mock: MockType, mocker: MockFixture
+):
+    """Test that CLI argument overrides config setting."""
+    mocker.patch(
+        "questionary.prompt",
+        return_value={
+            "prefix": "feat",
+            "subject": "add feature",
+            "scope": "",
+            "is_breaking_change": False,
+            "body": "This is a line that is longer than 40 characters but shorter than 80 characters",
+            "footer": "",
+        },
+    )
+
+    commit_mock = mocker.patch(
+        "commitizen.git.commit", return_value=cmd.Command("success", "", b"", b"", 0)
+    )
+
+    # Set config to 40 (would wrap)
+    config.settings["body_length_limit"] = 40
+
+    # Override with CLI argument to 0 (should NOT wrap)
+    commands.Commit(config, {"body_length_limit": 0})()
+
+    success_mock.assert_called_once()
+
+    # Get the actual commit message
+    committed_message = commit_mock.call_args[0][0]
+
+    # The line should NOT be wrapped (CLI override to 0 disables wrapping)
+    assert (
+        "This is a line that is longer than 40 characters but shorter than 80 characters"
+        in committed_message
+    )
+
+
+@pytest.mark.usefixtures("staging_is_clean")
+def test_commit_command_with_body_length_limit_no_body(
+    config, success_mock: MockType, mocker: MockFixture
+):
+    """Test that commits without body work correctly with body_length_limit set."""
+    mocker.patch(
+        "questionary.prompt",
+        return_value={
+            "prefix": "feat",
+            "subject": "add feature",
+            "scope": "",
+            "is_breaking_change": False,
+            "body": "",  # No body
+            "footer": "",
+        },
+    )
+
+    commit_mock = mocker.patch(
+        "commitizen.git.commit", return_value=cmd.Command("success", "", b"", b"", 0)
+    )
+
+    # Execute commit with body_length_limit (should not crash)
+    commands.Commit(config, {"body_length_limit": 72})()
+
+    success_mock.assert_called_once()
+
+    # Get the actual commit message
+    committed_message = commit_mock.call_args[0][0]
+
+    # Should just be the subject line
+    assert committed_message.strip() == "feat: add feature"

tests/commands/test_common_command/test_command_shows_description_when_use_help_option_py_3_10_commit_.txt

@@ -1,6 +1,7 @@
 usage: cz commit [-h] [--retry] [--no-retry] [--dry-run]
                  [--write-message-to-file FILE_PATH] [-s] [-a] [-e]
-                 [-l MESSAGE_LENGTH_LIMIT] [--]
+                 [-l MESSAGE_LENGTH_LIMIT]
+                 [--body-length-limit BODY_LENGTH_LIMIT] [--]
 
 Create new commit
 
@@ -22,4 +23,8 @@ options:
   -l MESSAGE_LENGTH_LIMIT, --message-length-limit MESSAGE_LENGTH_LIMIT
                         Set the length limit of the commit message; 0 for no
                         limit.
+  --body-length-limit BODY_LENGTH_LIMIT
+                        Set the length limit of the commit body. Commit
+                        message in body will be rewrapped to this length; 0
+                        for no limit.
   --                    Positional arguments separator (recommended).

tests/commands/test_common_command/test_command_shows_description_when_use_help_option_py_3_11_commit_.txt

@@ -1,6 +1,7 @@
 usage: cz commit [-h] [--retry] [--no-retry] [--dry-run]
                  [--write-message-to-file FILE_PATH] [-s] [-a] [-e]
-                 [-l MESSAGE_LENGTH_LIMIT] [--]
+                 [-l MESSAGE_LENGTH_LIMIT]
+                 [--body-length-limit BODY_LENGTH_LIMIT] [--]
 
 Create new commit
 
@@ -22,4 +23,8 @@ options:
   -l MESSAGE_LENGTH_LIMIT, --message-length-limit MESSAGE_LENGTH_LIMIT
                         Set the length limit of the commit message; 0 for no
                         limit.
+  --body-length-limit BODY_LENGTH_LIMIT
+                        Set the length limit of the commit body. Commit
+                        message in body will be rewrapped to this length; 0
+                        for no limit.
   --                    Positional arguments separator (recommended).

tests/commands/test_common_command/test_command_shows_description_when_use_help_option_py_3_12_commit_.txt

@@ -1,6 +1,7 @@
 usage: cz commit [-h] [--retry] [--no-retry] [--dry-run]
                  [--write-message-to-file FILE_PATH] [-s] [-a] [-e]
-                 [-l MESSAGE_LENGTH_LIMIT] [--]
+                 [-l MESSAGE_LENGTH_LIMIT]
+                 [--body-length-limit BODY_LENGTH_LIMIT] [--]
 
 Create new commit
 
@@ -22,4 +23,8 @@ options:
   -l MESSAGE_LENGTH_LIMIT, --message-length-limit MESSAGE_LENGTH_LIMIT
                         Set the length limit of the commit message; 0 for no
                         limit.
+  --body-length-limit BODY_LENGTH_LIMIT
+                        Set the length limit of the commit body. Commit
+                        message in body will be rewrapped to this length; 0
+                        for no limit.
   --                    Positional arguments separator (recommended).

tests/commands/test_common_command/test_command_shows_description_when_use_help_option_py_3_13_commit_.txt

@@ -1,6 +1,7 @@
 usage: cz commit [-h] [--retry] [--no-retry] [--dry-run]
                  [--write-message-to-file FILE_PATH] [-s] [-a] [-e]
-                 [-l MESSAGE_LENGTH_LIMIT] [--]
+                 [-l MESSAGE_LENGTH_LIMIT]
+                 [--body-length-limit BODY_LENGTH_LIMIT] [--]
 
 Create new commit
 
@@ -22,4 +23,8 @@ options:
   -l, --message-length-limit MESSAGE_LENGTH_LIMIT
                         Set the length limit of the commit message; 0 for no
                         limit.
+  --body-length-limit BODY_LENGTH_LIMIT
+                        Set the length limit of the commit body. Commit
+                        message in body will be rewrapped to this length; 0
+                        for no limit.
   --                    Positional arguments separator (recommended).