add 3.7 compatibility to session.install_groups

Author: Niicck

noxfile.py

@@ -14,7 +14,8 @@
 
 
 package = "nox_poetry"
-python_versions = ["3.11", "3.10", "3.9", "3.8"]
+python_versions = ["3.11", "3.10", "3.9", "3.8", "3.7"]
+poetry_versions = ["1.0.10", "1.2.0"]
 nox.needs_version = ">= 2021.6.6"
 nox.options.sessions = (
     "pre-commit",
@@ -152,7 +153,11 @@ def mypy(session: Session) -> None:
 @session
 @nox.parametrize(
     "python,poetry",
-    [(python_versions[0], "1.2.0"), *((python, None) for python in python_versions)],
+    [
+        (python_versions[0], poetry_versions[0]),
+        (python_versions[0], poetry_versions[1]),
+        *((python, None) for python in python_versions),
+    ],
 )
 def tests(session: Session, poetry: Optional[str]) -> None:
     """Run the test suite."""

poetry.lock

@@ -16,7 +16,7 @@ classifiers = [
 Changelog = "https://github.com/cjolowicz/nox-poetry/releases"
 
 [tool.poetry.dependencies]
-python = "^3.8.1"
+python = "^3.7"
 nox = ">=2020.8.22"
 tomlkit = ">=0.7"
 packaging = ">=20.9"
@@ -42,7 +42,7 @@ darglint = ">=1.8.1"
 pre-commit-hooks = ">=4.1.0"
 furo = ">=2022.1.2"
 Pygments = ">=2.11.2"
-poetry = ">=1.2.0"
+poetry = ">=1.1.12"
 pytest-datadir = ">=1.3.1"
 typing-extensions = ">=4.0.1"
 pyupgrade = ">=2.31.0"

pyproject.toml

@@ -1,6 +1,7 @@
 """Poetry interface."""
 import sys
 from enum import Enum
+from importlib import metadata
 from pathlib import Path
 from typing import Any
 from typing import Iterable
@@ -10,6 +11,15 @@
 
 import tomlkit
 from nox.sessions import Session
+from packaging.version import Version
+
+
+POETRY_VERSION = Version(metadata.version("poetry"))
+POETRY_VERSION_1_2_0 = Version("1.2.0")
+
+
+class IncompatiblePoetryVersionError(Exception):
+    """Installed poetry version does not meet requirements."""
 
 
 class CommandSkippedError(Exception):
@@ -94,8 +104,10 @@ def export(
 
         if only_groups:
             args.extend(f"--only={group}" for group in only_groups)
-        else:
+        elif POETRY_VERSION >= POETRY_VERSION_1_2_0:
             args.append("--with=dev")
+        else:
+            args.append("--dev")
 
         output = self.session.run_always(
             *args,

src/nox_poetry/poetry.py

@@ -14,8 +14,11 @@
 from packaging.requirements import InvalidRequirement
 from packaging.requirements import Requirement
 
+from nox_poetry.poetry import POETRY_VERSION
+from nox_poetry.poetry import POETRY_VERSION_1_2_0
 from nox_poetry.poetry import CommandSkippedError
 from nox_poetry.poetry import DistributionFormat
+from nox_poetry.poetry import IncompatiblePoetryVersionError
 from nox_poetry.poetry import Poetry
 
 
@@ -338,10 +341,21 @@ def install(self, *args: str, **kwargs: Any) -> None:
     def install_groups(self, groups: List[str], *args, **kwargs) -> None:
         """Install all packages in the given Poetry dependency groups.
 
+        Raises:
+            IncompatiblePoetryVersionError: The version of poetry installed is less than
+                v1.2.0, which is not compatible with installing dependency groups.
+
         Args:
             groups: The poetry dependency groups to install.
             args: Command-line arguments for ``pip install``.
             kwargs: Keyword-arguments for ``session.install``. These are the same
                 as those for :meth:`nox.sessions.Session.run`.
         """
+        if POETRY_VERSION < POETRY_VERSION_1_2_0:
+            raise IncompatiblePoetryVersionError(
+                f"Installed version of poetry must be >={POETRY_VERSION_1_2_0} in "
+                "order to install dependency groups. Current version installed: "
+                f"{POETRY_VERSION}"
+            )
+
         return self.poetry.install_groups(groups, *args, **kwargs)

src/nox_poetry/sessions.py

@@ -8,5 +8,5 @@ authors = ["Your Name <[email protected]>"]
 python = "^3.6.1"
 
 [build-system]
-requires = ["poetry-core>=1.2.0"]
+requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"

tests/functional/data/example-v1.2.0/poetry.lock

@@ -11,5 +11,5 @@ example = {path = "../example"}
 [tool.poetry.dev-dependencies]
 
 [build-system]
-requires = ["poetry-core>=1.2.0"]
+requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"

tests/functional/data/outdated-lockfile/pyproject.toml

@@ -11,5 +11,5 @@ poyo = {url = "https://github.com/hackebrot/poyo/archive/main.zip"}
 [tool.poetry.dev-dependencies]
 
 [build-system]
-requires = ["poetry-core>=1.2.0"]
-build-backend = "poetry.masonry.api"
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"

tests/functional/data/path-dependency/pyproject.toml

@@ -1,10 +1,21 @@
 """Functional tests for the `install_groups`."""
+import pytest
+
 import nox_poetry
+from nox_poetry.poetry import POETRY_VERSION
+from nox_poetry.poetry import POETRY_VERSION_1_2_0
 from tests.functional.conftest import Project
 from tests.functional.conftest import list_packages
 from tests.functional.conftest import run_nox_with_noxfile
 
 
+skipif_poetry_version_is_under_1_2_0 = pytest.mark.skipif(
+    POETRY_VERSION < POETRY_VERSION_1_2_0,
+    reason="session.install_groups() requires poetry>=1.2.0",
+)
+
+
+@skipif_poetry_version_is_under_1_2_0
 def test_dev_dependencies(project: Project) -> None:
     """It installs only dev-dependencies on <1.2.0 example pyproject.toml."""
 
@@ -24,6 +35,7 @@ def test(session: nox_poetry.Session) -> None:
     assert set(expected) == set(packages)
 
 
+@skipif_poetry_version_is_under_1_2_0
 def test_group_dev(group_project: Project) -> None:
     """It installs only dev group on >=1.2.0 example pyproject.toml."""
 
@@ -43,6 +55,7 @@ def test(session: nox_poetry.Session) -> None:
     assert set(expected) == set(packages)
 
 
+@skipif_poetry_version_is_under_1_2_0
 def test_two_groups(group_project: Project) -> None:
     """It installs only 2 dependency groups on >=1.2.0 example pyproject.toml."""