feat(commands/commit): add force-edit functionality after answering questions

Author: josix

commitizen/cli.py

@@ -156,6 +156,12 @@ def __call__(
                         "action": "store_true",
                         "help": "Tell the command to automatically stage files that have been modified and deleted, but new files you have not told Git about are not affected.",
                     },
+                    {
+                        "name": ["-e", "--edit"],
+                        "action": "store_true",
+                        "default": False,
+                        "help": "edit the commit message before committing",
+                    },
                     {
                         "name": ["-l", "--message-length-limit"],
                         "type": int,

commitizen/commands/commit.py

@@ -2,6 +2,9 @@
 
 import contextlib
 import os
+import shutil
+import subprocess
+import tempfile
 
 import questionary
 
@@ -72,9 +75,27 @@ def prompt_commit_questions(self) -> str:
 
         return message
 
+    def force_edit(self, message: str) -> str:
+        editor = git.get_core_editor()
+        if editor is None:
+            raise RuntimeError("No 'editor' value given and no default available.")
+        exec_path = shutil.which(editor)
+        if exec_path is None:
+            raise RuntimeError(f"Editor '{editor}' not found.")
+        with tempfile.NamedTemporaryFile(mode="w", delete=False) as file:
+            file.write(message)
+        file_path = file.name
+        argv = [exec_path, file_path]
+        subprocess.call(argv)
+        with open(file_path) as temp_file:
+            message = temp_file.read().strip()
+        file.unlink()
+        return message
+
     def __call__(self):
         dry_run: bool = self.arguments.get("dry_run")
         write_message_to_file: bool = self.arguments.get("write_message_to_file")
+        force_edit: bool = self.arguments.get("edit")
 
         is_all: bool = self.arguments.get("all")
         if is_all:
@@ -101,6 +122,9 @@ def __call__(self):
         else:
             m = self.prompt_commit_questions()
 
+        if force_edit:
+            m = self.force_edit(m)
+
         out.info(f"\n{m}\n")
 
         if write_message_to_file:

commitizen/git.py

@@ -271,6 +271,13 @@ def get_eol_style() -> EOLTypes:
         return map["native"]
 
 
+def get_core_editor() -> str | None:
+    c = cmd.run("git var GIT_EDITOR")
+    if c.out:
+        return c.out.strip()
+    return None
+
+
 def smart_open(*args, **kargs):
     """Open a file with the EOL style determined from Git."""
     return open(*args, newline=get_eol_style().get_eol_for_open(), **kargs)

tests/commands/test_commit_command.py

@@ -410,6 +410,31 @@ def test_commit_command_with_message_length_limit(config, mocker: MockFixture):
         commands.Commit(config, {"message_length_limit": message_length - 1})()
 
 
+@pytest.mark.usefixtures("staging_is_clean")
+def test_force_edit(config, mocker: MockFixture, tmp_path):
+    mocker.patch("commitizen.git.get_core_editor", return_value="vim")
+    subprocess_mock = mocker.patch("subprocess.call")
+
+    mocker.patch("shutil.which", return_value="vim")
+
+    test_message = "Initial commit message"
+    temp_file = tmp_path / "temp_commit_message"
+    temp_file.write_text(test_message)
+
+    mock_temp_file = mocker.patch("tempfile.NamedTemporaryFile")
+    mock_temp_file.return_value.__enter__.return_value.name = str(temp_file)
+
+    commit_instance = commands.Commit(config, {"edit": True})
+
+    edited_message = commit_instance.force_edit(test_message)
+
+    subprocess_mock.assert_called_once_with(["vim", str(temp_file)])
+
+    assert edited_message == test_message.strip()
+
+    temp_file.unlink()
+
+
 @skip_below_py_3_13
 def test_commit_command_shows_description_when_use_help_option(
     mocker: MockFixture, capsys, file_regression

tests/commands/test_commit_command/test_commit_command_shows_description_when_use_help_option.txt

@@ -1,5 +1,5 @@
 usage: cz commit [-h] [--retry] [--no-retry] [--dry-run]
-                 [--write-message-to-file FILE_PATH] [-s] [-a]
+                 [--write-message-to-file FILE_PATH] [-s] [-a] [-e]
                  [-l MESSAGE_LENGTH_LIMIT]
 
 create new commit
@@ -16,5 +16,6 @@ options:
   -a, --all             Tell the command to automatically stage files that
                         have been modified and deleted, but new files you have
                         not told Git about are not affected.
-  -l, --message-length-limit MESSAGE_LENGTH_LIMIT
+  -e, --edit            edit the commit message before committing
+  -l MESSAGE_LENGTH_LIMIT, --message-length-limit MESSAGE_LENGTH_LIMIT
                         length limit of the commit message; 0 for no limit

tests/test_git.py

@@ -283,6 +283,26 @@ def test_eoltypes_get_eol_for_open():
     assert git.EOLTypes.get_eol_for_open(git.EOLTypes.CRLF) == "\r\n"
 
 
+def test_get_core_editor(mocker):
+    mocker.patch.dict(os.environ, {"GIT_EDITOR": "nano"})
+    assert git.get_core_editor() == "nano"
+
+    mocker.patch.dict(os.environ, clear=True)
+    mocker.patch(
+        "commitizen.cmd.run",
+        return_value=cmd.Command(
+            out="vim", err="", stdout=b"", stderr=b"", return_code=0
+        ),
+    )
+    assert git.get_core_editor() == "vim"
+
+    mocker.patch(
+        "commitizen.cmd.run",
+        return_value=cmd.Command(out="", err="", stdout=b"", stderr=b"", return_code=1),
+    )
+    assert git.get_core_editor() is None
+
+
 def test_create_tag_with_message(tmp_commitizen_project):
     with tmp_commitizen_project.as_cwd():
         create_file_and_commit("feat(test): test")