Using --allow-no-commit on bump doesn't work (when updating CHANGELOG)

[alanbchristie]

Description

• python: 3.13.2
• commitizen: 4.13.7

[tool.commitizen]
name = "cz_customize"
version_provider = "pep621"
version_scheme = "semver2"
annotated_tag = true
update_changelog_on_bump = true
changelog_merge_prerelease = true
prerelease_offset = 1
pre_bump_hooks = ["./add-issue-links-to-changelog.sh"]

It seems that I am unable to bump if there are no changes and I want to update the CHANGELOG. In spite of attempting to ignore the fact there are no changes by using --allow-no-commit, when I try and produce a new pre-release (e.g. with --prerelease rc) I get No commits found.

If I do not set update_changelog_on_bump = true then it appears to work.

But it is perfectly reasonable to: -

1. Create a new release when there are no changes in the repository (i.e. going from beta to rc)
2. Also alter the CHANGELOG (to indicate there has been a release but nothing has changed)

In summary ... --allow-no-commit should perform as advertised ... allow a release regardless of changes.

See discussion #1865

Steps to reproduce

Here's my config pyproject.toml commitizen configuration: -

[tool.commitizen]
name = "cz_customize"
version_provider = "pep621"
version_scheme = "semver2"
annotated_tag = true
update_changelog_on_bump = true
changelog_merge_prerelease = true
prerelease_offset = 1
pre_bump_hooks = ["./add-issue-links-to-changelog.sh"]

Bump a release (when there are changes, creating a beta release)

cz bump --allow-no-commit --prerelease beta`

Let's assume this creates 4.5.0-beta.5

Do it again (for a release candidate)

cz bump --allow-no-commit --prerelease rc`

In this case I get told...

bump: version 4.5.0-beta.5 → 4.5.0-rc.1
tag to create: 4.5.0-rc.1
increment detected: PATCH

No commits found

Current behavior

I'm told No commits found even though I have used --allow-no-commit

Desired behavior

Using --allow-no-commit should never result in the error No commits found

Screenshots

No response

Environment

Commitizen Version: 4.13.7
Python Version: 3.13.2 (v3.13.2:4f8bb3947cf, Feb 4 2025, 11:51:10) [Clang 15.0.0 (clang-1500.3.9.4)]
Operating System: Darwin

[bearomorphism]

I can take a look

[bearomorphism]

I just found the root cause. Not sure why this specific configuration triggers the issue. I cannot repro this when not using cz_customize.