Fixed tag version extraction.

The output of `git describe` uses `-` as a delimiter. Parsing tags caused splits in the parsing of version numbers.

This joins all the remaining parts of the `git describe` with a `-`.

bumpversion/scm.py

@@ -132,10 +132,12 @@ def get_version_from_tag(cls, tag: str, tag_name: str, parse_pattern: str) -> Op
         """Return the version from a tag."""
         version_pattern = parse_pattern.replace("\\\\", "\\")
         version_pattern, regex_flags = extract_regex_flags(version_pattern)
-        rep = tag_name.replace("{new_version}", f"(?P<current_version>{version_pattern})")
-        rep = f"{regex_flags}{rep}"
+        parts = tag_name.split("{new_version}", maxsplit=1)
+        prefix = parts[0]
+        suffix = parts[1]
+        rep = f"{regex_flags}{re.escape(prefix)}(?P<current_version>{version_pattern}){re.escape(suffix)}"
         tag_regex = re.compile(rep)
-        return match["current_version"] if (match := tag_regex.match(tag)) else None
+        return match["current_version"] if (match := tag_regex.search(tag)) else None
 
     @classmethod
     def commit_to_scm(
@@ -286,7 +288,7 @@ def latest_tag_info(cls, tag_name: str, parse_pattern: str) -> SCMInfo:
 
         info.commit_sha = describe_out.pop().lstrip("g")
         info.distance_to_latest_tag = int(describe_out.pop())
-        version = cls.get_version_from_tag(describe_out[-1], tag_name, parse_pattern)
+        version = cls.get_version_from_tag("-".join(describe_out), tag_name, parse_pattern)
         info.current_version = version or "-".join(describe_out).lstrip("v")
 
         return info

tests/test_cli/test_bump.py

@@ -5,6 +5,7 @@
 import traceback
 from datetime import datetime
 from pathlib import Path
+from textwrap import dedent
 
 import pytest
 from pytest import param
@@ -255,3 +256,59 @@ def test_ignores_missing_files_with_option(tmp_path, fixtures_path, runner):
         print(traceback.print_exception(result.exc_info[1]))
 
     assert result.exit_code == 0
+
+
+def test_dash_in_tag_matches_current_version(git_repo, runner, caplog):
+    import logging
+
+    caplog.set_level(logging.DEBUG, logger="bumpversion")
+
+    repo_path: Path = git_repo
+    with inside_dir(repo_path):
+        # Arrange
+        config_toml = dedent(
+            """
+            [tool.bumpversion]
+            current_version = "4.0.3-beta+build.1047"
+            parse = "(?P<major>\\\\d+)\\\\.(?P<minor>\\\\d+)\\\\.(?P<patch>\\\\d+)(-(?P<release>[0-9A-Za-z]+))?(\\\\+build\\\\.(?P<build>.[0-9A-Za-z]+))?"
+            serialize = [
+                "{major}.{minor}.{patch}-{release}+build.{build}",
+                "{major}.{minor}.{patch}+build.{build}"
+            ]
+            commit = true
+            message = "Bump version: {current_version} -> {new_version}"
+            tag = false
+            tag_name = "app/{new_version}"
+            tag_message = "Version app/{new_version}"
+            allow_dirty = false
+
+            [tool.bumpversion.parts.release]
+            values = [
+                "beta",
+                "rc",
+                "final"
+            ]
+            optional_value = "final"
+
+            [tool.bumpversion.parts.build]
+            first_value = 1000
+            independent = true
+            always_increment = true
+        """
+        )
+        repo_path.joinpath(".bumpversion.toml").write_text(config_toml, encoding="utf-8")
+        subprocess.run(["git", "add", ".bumpversion.toml"], check=True)
+        subprocess.run(["git", "commit", "-m", "added file"], check=True)
+        subprocess.run(["git", "tag", "-a", "app/4.0.3-beta+build.1047", "-m", "added tag"], check=True)
+
+        # Act
+        result: Result = runner.invoke(cli.cli, ["bump", "-vv", "--tag", "--commit", "patch"])
+
+    # Assert
+    if result.exit_code != 0:
+        import traceback
+
+        print(caplog.text)
+        print(traceback.print_exception(result.exc_info[1]))
+
+    assert result.exit_code == 0

tests/test_config/test_init.py

@@ -0,0 +1,37 @@
+"""Tests for the config.__init__ module."""
+
+from dataclasses import dataclass
+from typing import Optional
+
+from bumpversion.scm import SCMInfo
+from bumpversion.config import check_current_version
+
+
+@dataclass
+class MockConfig:
+    """Just includes the current_version and scm_info attributes."""
+
+    current_version: Optional[str]
+    scm_info: SCMInfo
+
+
+class TestCheckCurrentVersion:
+    """
+    Tests for the check_current_version function.
+
+    - tag may not match serialization
+    - tag may not match current version in config
+    """
+
+    def test_uses_tag_when_missing_current_version(self):
+        """When the config does not have a current_version, the last tag is used."""
+        # Assemble
+        scm_info = SCMInfo()
+        scm_info.current_version = "1.2.3"
+        config = MockConfig(current_version=None, scm_info=scm_info)
+
+        # Act
+        result = check_current_version(config)
+
+        # Assert
+        assert result == "1.2.3"

tests/test_scm.py

@@ -12,6 +12,40 @@
 from tests.conftest import get_config_data, inside_dir
 
 
+class TestpSourceCodeManager:
+    """Tests related to SourceCodeManager."""
+
+    class TestGetVersionFromTag:
+        """Tests for the get_version_from_tag classmethod."""
+
+        simple_pattern = r"(?P<major>\\d+)\\.(?P<minor>\\d+)\.(?P<patch>\\d+)"
+        complex_pattern = r"(?P<major>\\d+)\\.(?P<minor>\\d+)\\.(?P<patch>\\d+)(-(?P<release>[0-9A-Za-z]+))?(\\+build\\.(?P<build>.[0-9A-Za-z]+))?"
+
+        @pytest.mark.parametrize(
+            ["tag", "tag_name", "parse_pattern", "expected"],
+            [
+                param("1.2.3", "{new_version}", simple_pattern, "1.2.3", id="no-prefix, no-suffix"),
+                param("v/1.2.3", "v/{new_version}", simple_pattern, "1.2.3", id="prefix, no-suffix"),
+                param("v/1.2.3/12345", "v/{new_version}/{something}", simple_pattern, "1.2.3", id="prefix, suffix"),
+                param("1.2.3/2024-01-01", "{new_version}/{today}", simple_pattern, "1.2.3", id="no-prefix, suffix"),
+                param(
+                    "app/4.0.3-beta+build.1047",
+                    "app/{new_version}",
+                    complex_pattern,
+                    "4.0.3-beta+build.1047",
+                    id="complex",
+                ),
+            ],
+        )
+        def returns_version_from_pattern(self, tag: str, tag_name: str, parse_pattern: str, expected: str) -> None:
+            """It properly returns the version from the tag."""
+            # Act
+            version = scm.SourceCodeManager.get_version_from_tag(tag, tag_name, parse_pattern)
+
+            # Assert
+            assert version == expected
+
+
 def test_format_and_raise_error(git_repo: Path) -> None:
     """The output formatting from called process error string works as expected."""
     with inside_dir(git_repo):