fix: properly bump versions between prereleases

commitizen/commands/bump.py

@@ -23,7 +23,11 @@
     NoVersionSpecifiedError,
 )
 from commitizen.providers import get_provider
-from commitizen.version_schemes import get_version_scheme, InvalidVersion
+from commitizen.version_schemes import (
+    get_version_scheme,
+    InvalidVersion,
+    VersionProtocol,
+)
 
 logger = getLogger("commitizen")
 
@@ -215,15 +219,27 @@ def __call__(self):  # noqa: C901
 
             # Increment is removed when current and next version
             # are expected to be prereleases.
-            if prerelease and current_version.is_prerelease:
-                increment = None
+            force_bump = False
+            if current_version.is_prerelease:
+                last_final = self.find_previous_final_version(current_version)
+                if last_final is not None:
+                    commits = git.get_commits(last_final)
+                    increment = self.find_increment(commits)
+                    semver = last_final.increment_base(
+                        increment=increment, force_bump=True
+                    )
+                    if semver != current_version.base_version:
+                        force_bump = True
+                elif prerelease:
+                    increment = None
 
             new_version = current_version.bump(
                 increment,
                 prerelease=prerelease,
                 prerelease_offset=prerelease_offset,
                 devrelease=devrelease,
                 is_local_version=is_local_version,
+                force_bump=force_bump,
             )
 
         new_tag_version = bump.normalize_tag(
@@ -375,3 +391,33 @@ def _get_commit_args(self):
         if self.no_verify:
             commit_args.append("--no-verify")
         return " ".join(commit_args)
+
+    def find_previous_final_version(
+        self, current_version: VersionProtocol
+    ) -> VersionProtocol | None:
+        tag_format: str = self.bump_settings["tag_format"]
+        current = bump.normalize_tag(
+            current_version,
+            tag_format=tag_format,
+            scheme=self.scheme,
+        )
+
+        final_versions = []
+        for tag in git.get_tag_names():
+            assert tag
+            try:
+                version = self.scheme(tag)
+                if not version.is_prerelease or tag == current:
+                    final_versions.append(version)
+            except InvalidVersion:
+                continue
+
+        if not final_versions:
+            return None
+
+        final_versions = sorted(final_versions)  # type: ignore [type-var]
+        current_index = final_versions.index(current_version)
+        previous_index = current_index - 1
+        if previous_index < 0:
+            return None
+        return final_versions[previous_index]

commitizen/version_schemes.py

@@ -105,6 +105,7 @@ def bump(
         prerelease_offset: int = 0,
         devrelease: int | None = None,
         is_local_version: bool = False,
+        force_bump: bool = False,
     ) -> Self:
         """
         Based on the given increment, generate the next bumped version according to the version scheme
@@ -171,7 +172,9 @@ def generate_devrelease(self, devrelease: int | None) -> str:
 
         return f"dev{devrelease}"
 
-    def increment_base(self, increment: str | None = None) -> str:
+    def increment_base(
+        self, increment: str | None = None, force_bump: bool = False
+    ) -> str:
         prev_release = list(self.release)
         increments = [MAJOR, MINOR, PATCH]
         base = dict(zip_longest(increments, prev_release, fillvalue=0))
@@ -180,7 +183,7 @@ def increment_base(self, increment: str | None = None) -> str:
         # must remove its prerelease tag,
         # so it doesn't matter the increment.
         # Example: 1.0.0a0 with PATCH/MINOR -> 1.0.0
-        if not self.is_prerelease:
+        if not self.is_prerelease or force_bump:
             if increment == MAJOR:
                 base[MAJOR] += 1
                 base[MINOR] = 0
@@ -200,6 +203,7 @@ def bump(
         prerelease_offset: int = 0,
         devrelease: int | None = None,
         is_local_version: bool = False,
+        force_bump: bool = False,
     ) -> Self:
         """Based on the given increment a proper semver will be generated.
 
@@ -217,9 +221,21 @@ def bump(
             local_version = self.scheme(self.local).bump(increment)
             return self.scheme(f"{self.public}+{local_version}")  # type: ignore
         else:
-            base = self.increment_base(increment)
+            base = self.increment_base(increment, force_bump)
             dev_version = self.generate_devrelease(devrelease)
-            pre_version = self.generate_prerelease(prerelease, offset=prerelease_offset)
+            release = list(self.release)
+            if len(release) < 3:
+                release += [0] * (3 - len(release))
+            current_semver = ".".join(str(part) for part in release)
+            if base == current_semver:
+                pre_version = self.generate_prerelease(
+                    prerelease, offset=prerelease_offset
+                )
+            else:
+                base_version = cast(BaseVersion, self.scheme(base))
+                pre_version = base_version.generate_prerelease(
+                    prerelease, offset=prerelease_offset
+                )
             # TODO: post version
             return self.scheme(f"{base}{pre_version}{dev_version}")  # type: ignore
 

tests/commands/test_bump_command.py

@@ -223,6 +223,42 @@ def test_bump_command_prelease(mocker: MockFixture):
     assert tag_exists is True
 
 
+@pytest.mark.usefixtures("tmp_commitizen_project")
+def test_bump_command_prelease_increment(mocker: MockFixture):
+    # FINAL RELEASE
+    create_file_and_commit("fix: location")
+
+    testargs = ["cz", "bump", "--yes"]
+    mocker.patch.object(sys, "argv", testargs)
+    cli.main()
+    assert git.tag_exist("0.1.1")
+
+    # PRERELEASE
+    create_file_and_commit("fix: location")
+
+    testargs = ["cz", "bump", "--prerelease", "alpha", "--yes"]
+    mocker.patch.object(sys, "argv", testargs)
+    cli.main()
+
+    assert git.tag_exist("0.1.2a0")
+
+    create_file_and_commit("feat: location")
+
+    testargs = ["cz", "bump", "--prerelease", "alpha", "--yes"]
+    mocker.patch.object(sys, "argv", testargs)
+    cli.main()
+
+    assert git.tag_exist("0.2.0a0")
+
+    create_file_and_commit("feat!: breaking")
+
+    testargs = ["cz", "bump", "--prerelease", "alpha", "--yes"]
+    mocker.patch.object(sys, "argv", testargs)
+    cli.main()
+
+    assert git.tag_exist("1.0.0a0")
+
+
 @pytest.mark.usefixtures("tmp_commitizen_project")
 def test_bump_on_git_with_hooks_no_verify_disabled(mocker: MockFixture):
     """Bump commit without --no-verify"""