implement -c/--commit-message

src/bumpver/cli.py

@@ -6,6 +6,7 @@
 # SPDX-License-Identifier: MIT
 """cli module for BumpVer."""
 import io
+import re
 import sys
 import typing as typ
 import logging
@@ -687,6 +688,13 @@ def _update_cfg_from_vcs(cfg: config.Config, fetch: bool) -> config.Config:
     ),
 )
 @version_options
+@click.option(
+    "-c",
+    "--commit-message",
+    default=None,
+    metavar="<MESSAGE>",
+    help="Set commit message.",
+)
 def update(
     dry           : bool = False,
     allow_dirty   : bool = False,
@@ -700,6 +708,7 @@ def update(
     pin_date      : bool = False,
     date          : typ.Optional[str] = None,
     set_version   : typ.Optional[str] = None,
+    commit_message: typ.Optional[str] = None,
 ) -> None:
     """Update project files with the incremented version string."""
     verbose = max(_VERBOSE, verbose)
@@ -747,18 +756,25 @@ def update(
     if dry or verbose >= 2:
         _print_diff(cfg, new_version)
 
-    if dry:
+    if commit_message is None:
-        return
+        commit_msg_template = cfg.commit_message
+    else:
+        commit_msg_template, _ = re.subn(r"\b(OLD|NEW)\b", r"{\1_VERSION}", commit_message)
 
     commit_message_kwargs = {
         'new_version'       : new_version,
         'old_version'       : old_version,
+        'NEW_VERSION'       : new_version,
+        'OLD_VERSION'       : old_version,
         'new_version_pep440': version.to_pep440(new_version),
         'old_version_pep440': version.to_pep440(old_version),
     }
-    commit_message = cfg.commit_message.format(**commit_message_kwargs)
+    try_commit_message = commit_msg_template.format(**commit_message_kwargs)
 
-    _try_update(cfg, new_version, commit_message, allow_dirty)
+    if dry:
+        return
+
+    _try_update(cfg, new_version, try_commit_message, allow_dirty)
 
 
 if __name__ == '__main__':

test/test_cli.py

@@ -890,6 +890,42 @@ def test_git_commit_message(runner, caplog):
     assert expected in commits[1]
 
 
+def test_cli_commit_message(runner, caplog):
+    _add_project_files("README.md", "setup.cfg")
+    result = runner.invoke(cli.cli, ['init', "-vv"])
+    assert result.exit_code == 0
+
+    _update_config_val(
+        "setup.cfg",
+        current_version='"v2019.1001-alpha"',
+        version_pattern="vYYYY.BUILD[-TAG]",
+    )
+
+    _vcs_init("git", ["README.md", "setup.cfg"])
+    assert len(caplog.records) > 0
+
+    cmd = [
+        'update',
+        "-vv",
+        "--pin-date",
+        "--tag",
+        "beta",
+        "--commit-message",
+        "my custom message (OLD -> NEW)",
+    ]
+
+    result = runner.invoke(cli.cli, cmd)
+    assert result.exit_code == 0
+
+    tags = shell("git", "tag", "--list").decode("utf-8")
+    assert "v2019.1002-beta" in tags
+
+    commits = shell(*shlex.split("git log -l 2")).decode("utf-8").split("\n\n")
+
+    expected = "my custom message (v2019.1001-alpha -> v2019.1002-beta)"
+    assert expected in commits[1]
+
+
 def test_grep(runner):
     _add_project_files("README.md")