add nox task for checking if the changelog got updated

.github/workflows/checks.yml

@@ -37,6 +37,25 @@ jobs:
         run: |
           poetry run python -m nox -s docs:build
 
+  Changelog:
+    name: Changelog Update Check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: SCM Checkout
+        uses: actions/checkout@v4
+
+      - name: Fetch the main branch
+        run: git fetch origin main
+
+      - name: Setup Python & Poetry Environment
+        uses: ./.github/actions/python-environment
+        with:
+          python-version: "3.9"
+
+      - name: Run changelog update check
+        run: poetry run nox -s changelog:updated
+
   build-matrix:
     name: Generate Build Matrix
     uses: ./.github/workflows/matrix-python.yml

doc/changes/unreleased.md

@@ -1 +1,5 @@
 # Unreleased
+
+## ✨ Added
+
+* [#65](https://github.com/exasol/python-toolbox/issues/65): Added a Nox task for checking if the changelog got updated.

exasol/toolbox/nox/_documentation.py

@@ -1,7 +1,10 @@
 from __future__ import annotations
 
 import shutil
+import subprocess
+import sys
 import webbrowser
+from pathlib import Path
 
 import nox
 from nox import Session
@@ -36,6 +39,25 @@ def _build_multiversion_docs(session: nox.Session, config: Config) -> None:
     )
 
 
+def _git_diff_changes_main() -> int:
+    """
+    Check if doc/changes is changed and return the exit code of command git diff.
+    The exit code is 0 if there are no changes.
+    """
+    p = subprocess.run(
+        [
+            "git",
+            "diff",
+            "--quiet",
+            "origin/main",
+            "--",
+            PROJECT_CONFIG.root / "doc/changes",
+        ],
+        capture_output=True,
+    )
+    return p.returncode
+
+
 @nox.session(name="docs:multiversion", python=False)
 def build_multiversion(session: Session) -> None:
     """Builds the multiversion project documentation"""
@@ -64,3 +86,14 @@ def clean_docs(_session: Session) -> None:
     docs_folder = PROJECT_CONFIG.root / DOCS_OUTPUT_DIR
     if docs_folder.exists():
         shutil.rmtree(docs_folder)
+
+
+@nox.session(name="changelog:updated", python=False)
+def updated(_session: Session) -> None:
+    """Checks if the change log has been updated"""
+    if _git_diff_changes_main() == 0:
+        print(
+            "Changelog is not updated.\n"
+            "Please describe your changes in the changelog!"
+        )
+        sys.exit(1)

exasol/toolbox/nox/tasks.py

@@ -58,6 +58,7 @@ def check(session: Session) -> None:
     build_docs,
     clean_docs,
     open_docs,
+    updated,
 )
 from exasol.toolbox.nox._release import prepare_release
 from exasol.toolbox.nox._shared import (

exasol/toolbox/templates/github/workflows/checks.yml

@@ -47,6 +47,22 @@ jobs:
     name: Generate Build Matrix
     uses: ./.github/workflows/matrix-python.yml
 
+  Changelog:
+    name: Changelog Update Check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: SCM Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Python & Poetry Environment
+        uses: ./.github/actions/python-environment
+        with:
+          python-version: "3.9"
+
+      - name: Run changelog update check
+        run: poetry run nox -s changelog:updated
+
   Lint:
     name: Linting (Python-${{ matrix.python-version }})
     needs: [ Version-Check, build-matrix ]