fix(commands/bump): Add NoneIncrementExit to avoid git fatal error

commitizen/commands/bump.py

@@ -12,6 +12,7 @@
     DryRunExit,
     ExpectedExit,
     NoCommitsFoundError,
+    NoneIncrementExit,
     NoPatternMapError,
     NotAGitProjectError,
     NoVersionSpecifiedError,
@@ -128,6 +129,9 @@ def __call__(self):  # noqa: C901
             f"increment detected: {increment}\n"
         )
 
+        if increment is None and new_tag_version == current_tag_version:
+            raise NoneIncrementExit()
+
         # Do not perform operations over files or git.
         if dry_run:
             raise DryRunExit()

commitizen/commands/init.py

@@ -47,7 +47,7 @@ def __call__(self):
     def _ask_config_path(self) -> str:
         name = questionary.select(
             "Please choose a supported config file: (default: pyproject.toml)",
-            choices=config_files,
+            choices=config_files,  # type: ignore
             default="pyproject.toml",
             style=self.cz.style,
         ).ask()
@@ -79,7 +79,7 @@ def _ask_tag(self) -> str:
 
             latest_tag = questionary.select(
                 "Please choose the latest tag: ",
-                choices=get_tag_names(),
+                choices=get_tag_names(),  # type: ignore
                 style=self.cz.style,
             ).ask()
 

commitizen/exceptions.py

@@ -53,6 +53,10 @@ class DryRunExit(ExpectedExit):
     pass
 
 
+class NoneIncrementExit(ExpectedExit):
+    pass
+
+
 class NoCommitizenFoundException(CommitizenException):
     exit_code = ExitCode.NO_COMMITIZEN_FOUND
 

commitizen/git.py

@@ -123,7 +123,7 @@ def get_latest_tag_name() -> Optional[str]:
     return c.out.strip()
 
 
-def get_tag_names() -> Optional[List[str]]:
+def get_tag_names() -> List[Optional[str]]:
     c = cmd.run("git tag --list")
     if c.err:
         return []

tests/commands/test_bump_command.py

@@ -1,14 +1,18 @@
+import inspect
 import sys
+from unittest.mock import MagicMock
 
 import pytest
 
+import commitizen.commands.bump as bump
 from commitizen import cli, cmd, git
 from commitizen.exceptions import (
     BumpTagFailedError,
     CurrentVersionNotFoundError,
     DryRunExit,
     ExpectedExit,
     NoCommitsFoundError,
+    NoneIncrementExit,
     NoPatternMapError,
     NotAGitProjectError,
     NoVersionSpecifiedError,
@@ -262,3 +266,38 @@ def test_bump_in_non_git_project(tmpdir, config, mocker):
         with pytest.raises(NotAGitProjectError):
             with pytest.raises(ExpectedExit):
                 cli.main()
+
+
+def test_none_increment_exit_should_be_a_class():
+    assert inspect.isclass(NoneIncrementExit)
+
+
+def test_none_increment_exit_should_be_expected_exit_subclass():
+    assert issubclass(NoneIncrementExit, ExpectedExit)
+
+
+def test_none_increment_exit_should_exist_in_bump():
+    assert hasattr(bump, "NoneIncrementExit")
+
+
+def test_none_increment_exit_is_exception():
+    assert bump.NoneIncrementExit == NoneIncrementExit
+
+
+@pytest.mark.usefixtures("tmp_commitizen_project")
+def test_none_increment_should_not_call_git_tag(mocker, tmp_commitizen_project):
+    create_file_and_commit("test(test_get_all_droplets): fix bad comparison test")
+    testargs = ["cz", "bump", "--yes"]
+    mocker.patch.object(sys, "argv", testargs)
+
+    # stash git.tag for later restore
+    stashed_git_tag = git.tag
+    dummy_value = git.tag("0.0.2")
+    git.tag = MagicMock(return_value=dummy_value)
+
+    with pytest.raises(NoneIncrementExit):
+        cli.main()
+        git.tag.assert_not_called()
+
+    # restore pop stashed
+    git.tag = stashed_git_tag

tests/test_git.py

@@ -1,3 +1,6 @@
+import inspect
+from typing import List, Optional
+
 import pytest
 
 from commitizen import git
@@ -68,3 +71,9 @@ def test_get_commits_author_and_email():
 
     assert commit.author is not ""
     assert "@" in commit.author_email
+
+
+def test_get_tag_names_has_correct_arrow_annotation():
+    arrow_annotation = inspect.getfullargspec(git.get_tag_names).annotations["return"]
+
+    assert arrow_annotation == List[Optional[str]]