GH Actions: automatically add changelog line for updated UI version

.github/workflows/update_ui.yml

@@ -55,6 +55,14 @@ jobs:
             git commit -m "ui: install ${version}"
           done
 
+      - name: Add to changelog
+        if: inputs.install
+        run: |
+          python3 -m pip install -q towncrier
+          towncrier create +.ui-version.md --content "Updated cylc-ui to ${{ inputs.install }}"
+          git add changes.d
+          commit --amend --no-edit
+
       - name: push
         run: |
           git push origin "$HEAD_BRANCH"

changes.d/changelog-template.jinja

@@ -1,5 +1,9 @@
 {% if sections[""] %}
-{% for category, val in definitions.items() if category in sections[""] %}
+{% if "ui-version" in sections[""] %}
+[{{ sections[""]["ui-version"].keys()|first }}](https://github.com/cylc/cylc-ui/blob/master/CHANGES.md)
+
+{% endif %}
+{% for category, val in definitions.items() if category in sections[""] and category != "ui-version" %}
 ### {{ definitions[category]['name'] }}
 
 {% for text, pulls in sections[""][category].items() %}

pyproject.toml

@@ -30,6 +30,10 @@ showcontent = true
 directory = "fix"
 name = "🔧 Fixes"
 showcontent = true
+[[tool.towncrier.type]]
+directory = "ui-version"
+name = "UI version"
+showcontent = true
 
 
 [tool.pytest.ini_options]