Added a test to make sure the documentation requirements file is up t…

…o date

noxfile.py

@@ -8,6 +8,7 @@
 
 import platform
 import re
+from difflib import unified_diff
 from pathlib import Path
 
 import nox
@@ -95,6 +96,19 @@ def check_development_environment(session: Session) -> None:
             Update with 'poetry install --sync', using '--with' and '-E' for optional dependencies, extras respectively.
             Note: {removals} packages are not in the specification (i.e. installed manually) and may be removed.
             To preview changes, run 'poetry install --sync --dry-run' (with optional dependencies and extras).""")
+
+@session    # to only run on the current python interpreter
+def check_requirements_files(session: Session) -> None:
+    """Check whether the requirement files are not outdated."""
+    doc_requirements_path = Path("doc/requirements.txt")
+    doc_temp_requirements_path = Path("doc/test_requirements.txt")
+    if doc_temp_requirements_path.exists():
+        doc_temp_requirements_path.unlink()
+    session.run("poetry", "export", "--with", "docs", "--without-hashes", "--format=requirements.txt", "--output", str(doc_temp_requirements_path), external=True)
+    diff = list(unified_diff(doc_requirements_path.read_text(), doc_temp_requirements_path.read_text()))
+    if doc_temp_requirements_path.exists():
+        doc_temp_requirements_path.unlink()
+    assert len(diff) == 0, f"Documentation requirements file not up to date with poetry.lock, please update it.\nDiff: {diff}"
 
 @session(python=python_versions_to_test)  # missing versions can be installed with `pyenv install ...`
 # do not forget check / set the versions with `pyenv global`, or `pyenv local` in case of virtual environment

pyproject.toml

@@ -91,7 +91,7 @@ cuda_opencl = ["pycuda", "pyopencl"]
 hip = ["pyhip-interface"]
 tutorial = ["jupyter", "matplotlib", "nvidia-ml-py"]
 
-# ATTENTION: if anything is changed here, run `poetry update` and `poetry export --with docs --without-hashes --format=requirements.txt > doc/requirements.txt`
+# ATTENTION: if anything is changed here, run `poetry update` and `poetry export --with docs --without-hashes --format=requirements.txt --output doc/requirements.txt`
 # Please note that there is overlap with the `dev` group
 [tool.poetry.group.docs]
 optional = true