[BUG] Bump failes if Changelog exists

Description

When i run cz bump it fails unless i delete the CHANGELOG.md generated by the last bump. While the version is bumped and all files are changed in regard to the version in there, the commit and tag isn’t created

Steps to reproduce

1. clone https://github.com/FactoryRally/game-controller
2. checkout commit 45d5049d69ee6c0d3a5b879caa619d1cab58f575
3. run cz bump
4. delete CHANGELOG.md
5. run cz bump again

Current behavior

nitonfx@laptop:/path/game-controller$ cz bump
bump: version 2.2.0b0 → 2.2.0
tag to create: v2.2.0
increment detected: MINOR

No tag found to do an incremental changelog
nitonfx@laptop:/path/game-controller$ rm CHANGELOG.md
nitonfx@laptop:/path/game-controller$ cz bump
bump: version 2.2.0b0 → 2.2.0
tag to create: v2.2.0
increment detected: MINOR

Done!

Desired behavior

A clearer message whats going wrong or it just working.

Environment

• commitizen version: 2.13.0
• python version: 2.7.17
• operating system: Linux

[Lee-W]

Hi @phildong , thanks for reporting. I just confirm it’s reproducible on my machine.

[phildong]

I believe I’m seeing very similar behavior, and I believe this only happens when the last version is a pre-release. Here is a reproducible example I’m able to come up with:

# step1 init everything, not exactly relevant to the bug
git init
cz init
git add .
git commit -m "chore: add config"
git tag 0.0.1

# step2 add a dummy feature and make a pre-release
git commit -m "feat: first feat" --allow-empty
cz bump --prerelease rc --changelog

# step3 add another feature and try to do incremental changelog
git commit -m "feat: second feat" --allow-empty
cz changelog --incremental

The last line would fail with No tag found to do an incremental changelog As @nbrugger-tgm noted clearing the content of changelog would work around this, but of course that would clear any custom edits in the changelog. However everything would be fine if I don’t do --prerelease in step2.

I’m using git version 2.31.1 and cz version 2.17.4

Let me know if this is reproducible/helpful!