Use poetry in tox again

tox.ini:
Call poetry in tox.ini again, as this way we can ensure to install
all packages based on the lock file.
Additionally, this allows to properly and selectively install extras,
required e.g. by the coverage target (as to not install pyalpm for all
targets).

.gitlab-ci.yml:
Install python-poetry to test environment.

pyproject.toml:
Add setuptools to build requirements because of bug in pip:
pypa/pip#6100

.gitlab-ci.yml

@@ -14,7 +14,7 @@ stages:
   before_script:
     - printf "[multilib]\nInclude = /etc/pacman.d/mirrorlist\n" >> /etc/pacman.conf
     - pacman --noconfirm -Fyy
-    - pacman --noconfirm -Syyu --needed base-devel git python-tox
+    - pacman --noconfirm -Syyu --needed base-devel git python-poetry python-tox
 
 linter:
   extends: .test

pyproject.toml

@@ -113,5 +113,7 @@ disallow_incomplete_defs = true
 show_error_codes = true
 
 [build-system]
-requires = ["poetry-core>=1.0.0"]
+# requiring setuptools to get around flaky pip behavior (we actually don't need it)
+# https://github.com/pypa/pip/issues/6100
+requires = ["setuptools", "poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"

tox.ini

@@ -1,35 +1,37 @@
 [tox]
-isolated_build = true
+isolated_build = True
 envlist = linter,coverage
 skip_missing_interpreters = True
-requires =
-    tox-poetry-dev-dependencies
 
 [testenv]
 base_python = py310
-poetry_add_dev_dependencies = True
+whitelist_externals = poetry
 
 [testenv:coverage]
 commands =
-    coverage run
-    coverage xml -o {toxworkdir}/coverage.xml -i
-    coverage html -d {toxworkdir}/htmlcov -i
-    coverage report --fail-under=100.0
+    poetry install -E vercmp
+    poetry run coverage run
+    poetry run coverage xml -o {toxworkdir}/coverage.xml -i
+    poetry run coverage html -d {toxworkdir}/htmlcov -i
+    poetry run coverage report --fail-under=100.0
 
 [testenv:linter]
 commands =
-    isort --check .
-    black --check .
-    flake8
-    mypy --install-types --non-interactive -p repod -p tests
+    poetry install
+    poetry run isort --check .
+    poetry run black --check .
+    poetry run flake8
+    poetry run mypy --install-types --non-interactive -p repod -p tests
 
 [testenv:docs]
 commands =
-    python -c 'from repod.models.package import export_schemas; export_schemas(output="docs/repositories/schema/")'
-    python -c 'from repod.files.buildinfo import export_schemas; export_schemas(output="docs/packages/schema/")'
-    python -c 'from repod.files.mtree import export_schemas; export_schemas(output="docs/packages/schema/")'
-    sphinx-build -M html docs/ docs/_build/
+    poetry install
+    poetry run python -c 'from repod.models.package import export_schemas; export_schemas(output="docs/repositories/schema/")'
+    poetry run python -c 'from repod.files.buildinfo import export_schemas; export_schemas(output="docs/packages/schema/")'
+    poetry run python -c 'from repod.files.mtree import export_schemas; export_schemas(output="docs/packages/schema/")'
+    poetry run sphinx-build -M html docs/ docs/_build/
 
 [testenv:integration]
 commands =
-    pytest -vv tests/ -m "integration"
+    poetry install
+    poetry run pytest -m "integration"