feat: add parameter to changelog generation

[dornech]

... to identify incremental generation run in the jinja template.
This allows to include / exclude f. e. header lines form the current generation run to avoid multiple generation of header line(s)

Please refer to #1620

[bearomorphism]

missing comma at the end of line.

[dornech]

Ah sorry, I tested locally and did the change directly in GitHub ...
But thanks it is being considered at least for release 4.11, I think it is a simple change with real benefit for many.

[bearomorphism]

It'd be better to add test cases related to #1620, thanks.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.25%. Comparing base (120d514) to head (2facaca).
⚠️ Report is 948 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1625      +/-   ##
==========================================
+ Coverage   97.33%   98.25%   +0.91%     
==========================================
  Files          42       58      +16     
  Lines        2104     2694     +590     
==========================================
+ Hits         2048     2647     +599     
+ Misses         56       47       -9     

Flag	Coverage Δ
unittests	98.25% <ø> (+0.91%)	⬆️

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[bearomorphism]

Hi @dornech , can you help to improve the test coverage when you have a moment? Thanks!

[dornech]

Hm. I am adfraid I am not experienced enough with pytest and etc to knpw what to do.

[bearomorphism]

It's ok 👌
Thanks a lot for submitting the issue

[bearomorphism]

Hi @dornech ,

I went through the discussion #1620 and our current codebase.

You can refer to the tests with --incremental flags in test_changelog_command.py, and provide the full template file you are using, since the existing templates in our code base cannot repro the problem you encountered.

I can continue to work on for the test. The discussion is definitely great for those people who want a # CHANGELOG level 1 header in their changelog file.

[dornech]

Here you go:

{%- raw %}{% if not incremental %}
# CHANGELOG
{% endif %}{% endraw %}
{% raw %}{# Macro: Capitalize the first letter of a string only #}
{% macro capitalize_first_letter_only(sentence) %}
{{    (sentence[0] | upper) ~ sentence[1:] }}
{% endmacro %}{% endraw %}

{% raw %}{% for entry in tree %}{% endraw %}


## [{% raw %}{{ entry.version }}]({% endraw %}{{ cookiecutter.project_repo }}{% raw %}/releases/tag/{{ entry.version }}) {% if entry.date %} ({{ entry.date }}) {% endif %}{% endraw %}

{% raw %}{% for change_type, changes in entry.changes.items() %}{% endraw %}

{% raw %}{% if change_type %}{% endraw %}
### {% raw %}{{ capitalize_first_letter_only(change_type) }}{% endraw %}
{% raw %}{% endif %}{% endraw %}
{% raw %}{% for change in changes %}{% endraw %}
{% raw %}{% if change.scope %}{% endraw %}
- {% raw %}**{{ change.scope }}**: {{ capitalize_first_letter_only(change.message) }} (['{{ change.sha1[:7] }}']({% endraw %}{{ cookiecutter.project_repo }}{% raw %}/commit/{{ change.sha1 }})){% endraw %}
{% raw %}{% elif change.message %}{% endraw %}
- {% raw %}{{ capitalize_first_letter_only(change.message) }}(['{{ change.sha1[:7] }}']({% endraw %}{{ cookiecutter.project_repo }}{% raw %}/commit/{{ change.sha1 }})){% endraw %}
{% raw %}{% endif %}{% endraw %}
{% raw -%}
{% endfor %}
{% endfor %}
{% endfor %}
{% endraw -%}

You may refer to my repository https://github.com/dornech/the-hatchlor-enhanced/blob/main/%7B%7Bcookiecutter.project_slug%7D%7D/changelog_commitizen-template.md.j2