From 2308dca183b8f7463464f983364d348ad2b4049a Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Sat, 1 Aug 2020 18:00:50 +0200
Subject: [PATCH 01/17] Update template to 2020.7.15

---
 .cookiecutter.json                    |   2 +-
 .dependabot/config.yml                |  26 -
 .github/dependabot.yml                |  18 +
 .github/workflows/constraints.txt     |   7 +-
 .github/workflows/coverage.yml        |  16 -
 .github/workflows/docs.yml            |  18 -
 .github/workflows/release-drafter.yml |  12 -
 .github/workflows/release.yml         |  88 +++-
 .github/workflows/test-pypi.yml       |  26 -
 .github/workflows/tests.yml           |  94 +++-
 .pre-commit-config.yaml               |  64 ++-
 README.rst                            |  34 +-
 docs/reference.rst                    |   1 -
 docs/requirements.txt                 |   2 +-
 mypy.ini                              |   6 -
 noxfile.py                            | 100 +++-
 poetry.lock                           | 721 +++++++++++++++++++++-----
 pyproject.toml                        |  30 +-
 18 files changed, 912 insertions(+), 353 deletions(-)
 delete mode 100644 .dependabot/config.yml
 create mode 100644 .github/dependabot.yml
 delete mode 100644 .github/workflows/coverage.yml
 delete mode 100644 .github/workflows/docs.yml
 delete mode 100644 .github/workflows/release-drafter.yml
 delete mode 100644 .github/workflows/test-pypi.yml

diff --git a/.cookiecutter.json b/.cookiecutter.json
index da8b3c17..ddac2641 100644
--- a/.cookiecutter.json
+++ b/.cookiecutter.json
@@ -1,5 +1,5 @@
 {
-  "_template": "gh:cjolowicz/cookiecutter-hypermodern-python",
+  "_template": "https://github.com/cjolowicz/cookiecutter-hypermodern-python.git",
   "author": "Claudio Jolowicz",
   "email": "mail@claudiojolowicz.com",
   "friendly_name": "nox-poetry",
diff --git a/.dependabot/config.yml b/.dependabot/config.yml
deleted file mode 100644
index 837e3e88..00000000
--- a/.dependabot/config.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-version: 1
-update_configs:
-  - package_manager: "python"
-    directory: "/"
-    update_schedule: "daily"
-    allowed_updates:
-      - match:
-          update_type: "all"
-  - package_manager: "python"
-    directory: "/docs"
-    update_schedule: "daily"
-    allowed_updates:
-      - match:
-          update_type: "all"
-  - package_manager: "python"
-    directory: "/.github/workflows"
-    update_schedule: "daily"
-    allowed_updates:
-      - match:
-          update_type: "all"
-  - package_manager: "github_actions"
-    directory: "/"
-    update_schedule: "daily"
-    allowed_updates:
-      - match:
-          update_type: "all"
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000..a0a5c735
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,18 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: daily
+  - package-ecosystem: pip
+    directory: "/.github/workflows"
+    schedule:
+      interval: daily
+  - package-ecosystem: pip
+    directory: "/docs"
+    schedule:
+      interval: daily
+  - package-ecosystem: pip
+    directory: "/"
+    schedule:
+      interval: daily
diff --git a/.github/workflows/constraints.txt b/.github/workflows/constraints.txt
index 179fdc79..80c9f8dc 100644
--- a/.github/workflows/constraints.txt
+++ b/.github/workflows/constraints.txt
@@ -1,3 +1,4 @@
-pip==20.1
-nox==2019.11.9
-poetry==1.0.5
+pip==20.1.1
+nox==2020.5.24
+poetry==1.0.9
+virtualenv==20.0.26
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
deleted file mode 100644
index f2a12f67..00000000
--- a/.github/workflows/coverage.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-name: Coverage
-on: [push, pull_request]
-jobs:
-  coverage:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2.1.0
-      - uses: actions/setup-python@v2
-        with:
-          python-version: "3.8"
-      - run: |
-          pip install --constraint=.github/workflows/constraints.txt pip
-          pip install --constraint=.github/workflows/constraints.txt nox poetry
-      - run: nox --force-color --session=tests-3.8 -- --cov --cov-report=xml
-      - if: always()
-        uses: codecov/codecov-action@v1.0.7
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
deleted file mode 100644
index 20b97938..00000000
--- a/.github/workflows/docs.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-name: Build documentation
-on: [push, pull_request]
-jobs:
-  docs:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2.1.0
-      - uses: actions/setup-python@v2
-        with:
-          python-version: "3.8"
-      - run: |
-          pip install --constraint=.github/workflows/constraints.txt pip
-          pip install --constraint=.github/workflows/constraints.txt nox poetry
-      - run: nox --force-color --session=docs
-      - uses: actions/upload-artifact@v2
-        with:
-          name: docs
-          path: docs/_build
diff --git a/.github/workflows/release-drafter.yml b/.github/workflows/release-drafter.yml
deleted file mode 100644
index 668a88bd..00000000
--- a/.github/workflows/release-drafter.yml
+++ /dev/null
@@ -1,12 +0,0 @@
-name: Release Drafter
-on:
-  push:
-    branches:
-      - master
-jobs:
-  draft_release:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: release-drafter/release-drafter@v5.8.0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 7059e656..182ef749 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1,42 +1,78 @@
 name: Release
+
 on:
-  release:
-    types: [published]
+  push:
+    branches:
+      - master
+
 jobs:
   release:
+    name: Release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.1.0
-      - uses: actions/setup-python@v2
+      - name: Check out the repository
+        uses: actions/checkout@v2.3.1
+        with:
+          fetch-depth: 2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
         with:
           python-version: "3.8"
-      - run: |
+
+      - name: Upgrade pip
+        run: |
           pip install --constraint=.github/workflows/constraints.txt pip
-          pip install --constraint=.github/workflows/constraints.txt nox poetry
-      - name: Compute cache key prefix
-        if: matrix.os != 'windows-latest'
-        id: cache_key_prefix
-        shell: python
+          pip --version
+
+      - name: Install Poetry
         run: |
-          import hashlib
-          import sys
+          pip install --constraint=.github/workflows/constraints.txt poetry
+          poetry --version
 
-          python = "py{}.{}".format(*sys.version_info[:2])
-          payload = sys.version.encode() + sys.executable.encode()
-          digest = hashlib.sha256(payload).hexdigest()
-          result = "${{ runner.os }}-{}-{}-pre-commit".format(python, digest[:8])
+      - name: Check if there is a parent commit
+        id: check-parent-commit
+        run: |
+          echo "::set-output name=sha::$(git rev-parse --verify --quiet HEAD^)"
 
-          print("::set-output name=result::{}".format(result))
-      - uses: actions/cache@v1.2.0
-        if: matrix.os != 'windows-latest'
+      - name: Detect and tag new version
+        id: check-version
+        if: steps.check-parent-commit.outputs.sha
+        uses: salsify/action-detect-and-tag-new-version@v2.0.1
         with:
-          path: ~/.cache/pre-commit
-          key: ${{ steps.cache_key_prefix.outputs.result }}-${{ hashFiles('.pre-commit-config.yaml') }}
-          restore-keys: |
-            ${{ steps.cache_key_prefix.outputs.result }}-
-      - run: nox --force-color
-      - run: poetry build --ansi
-      - uses: pypa/gh-action-pypi-publish@v1.1.0
+          version-command: |
+            bash -o pipefail -c "poetry version | awk '{ print \$2 }'"
+
+      - name: Bump version for developmental release
+        if: "! steps.check-version.outputs.tag"
+        run: |
+          poetry version patch &&
+          version=$(poetry version | awk '{ print $2 }') &&
+          poetry version $version.dev.$(date +%s)
+
+      - name: Build package
+        run: |
+          poetry build --ansi
+
+      - name: Publish package on PyPI
+        if: steps.check-version.outputs.tag
+        uses: pypa/gh-action-pypi-publish@v1.3.1
         with:
           user: __token__
           password: ${{ secrets.PYPI_TOKEN }}
+
+      - name: Publish package on TestPyPI
+        if: "! steps.check-version.outputs.tag"
+        uses: pypa/gh-action-pypi-publish@v1.3.1
+        with:
+          user: __token__
+          password: ${{ secrets.TEST_PYPI_TOKEN }}
+          repository_url: https://test.pypi.org/legacy/
+
+      - name: Publish the release notes
+        uses: release-drafter/release-drafter@v5.11.0
+        with:
+          publish: ${{ steps.check-version.outputs.tag != '' }}
+          tag: ${{ steps.check-version.outputs.tag }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/test-pypi.yml b/.github/workflows/test-pypi.yml
deleted file mode 100644
index fa40e7aa..00000000
--- a/.github/workflows/test-pypi.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-name: TestPyPI
-on:
-  push:
-    branches:
-      - master
-jobs:
-  test_pypi:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2.1.0
-      - uses: actions/setup-python@v2
-        with:
-          python-version: "3.8"
-      - run: |
-          pip install --constraint=.github/workflows/constraints.txt pip
-          pip install --constraint=.github/workflows/constraints.txt poetry
-      - run: >-
-          poetry version patch &&
-          version=$(poetry version | awk '{print $2}') &&
-          poetry version $version.dev.$(date +%s)
-      - run: poetry build --ansi
-      - uses: pypa/gh-action-pypi-publish@v1.1.0
-        with:
-          user: __token__
-          password: ${{ secrets.TEST_PYPI_TOKEN }}
-          repository_url: https://test.pypi.org/legacy/
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fb6ef0d5..a2c2994e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,26 +1,60 @@
 name: Tests
-on: [push, pull_request]
+
+on:
+  - push
+  - pull_request
+
 jobs:
   tests:
+    name: ${{ matrix.session }} ${{ matrix.python-version }} / ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         include:
-          - { python-version: 3.8, os: ubuntu-latest }
-          - { python-version: 3.8, os: windows-latest }
-          - { python-version: 3.8, os: macos-latest }
-          - { python-version: 3.7, os: ubuntu-latest }
-          - { python-version: 3.6, os: ubuntu-latest }
-    runs-on: ${{ matrix.os }}
-    name: Python ${{ matrix.python-version }} (${{ matrix.os }})
+          - { python-version: 3.8, os: ubuntu-latest, session: "pre-commit" }
+          - { python-version: 3.8, os: ubuntu-latest, session: "safety" }
+          - { python-version: 3.8, os: ubuntu-latest, session: "mypy" }
+          - { python-version: 3.7, os: ubuntu-latest, session: "mypy" }
+          - { python-version: 3.6, os: ubuntu-latest, session: "mypy" }
+          - { python-version: 3.8, os: ubuntu-latest, session: "tests" }
+          - { python-version: 3.7, os: ubuntu-latest, session: "tests" }
+          - { python-version: 3.6, os: ubuntu-latest, session: "tests" }
+          - { python-version: 3.8, os: windows-latest, session: "tests" }
+          - { python-version: 3.8, os: macos-latest, session: "tests" }
+          - { python-version: 3.8, os: ubuntu-latest, session: "typeguard" }
+          - { python-version: 3.8, os: ubuntu-latest, session: "docs" }
+
+    env:
+      NOXSESSION: ${{ matrix.session }}
+
     steps:
-      - uses: actions/checkout@v2.1.0
-      - uses: actions/setup-python@v2
+      - name: Check out the repository
+        uses: actions/checkout@v2.3.1
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Compute cache key prefix
-        if: matrix.os != 'windows-latest'
-        id: cache_key_prefix
+
+      - name: Upgrade pip
+        run: |
+          pip install --constraint=.github/workflows/constraints.txt pip
+          pip --version
+
+      - name: Install Poetry
+        run: |
+          pip install --constraint=.github/workflows/constraints.txt poetry
+          poetry --version
+
+      - name: Install Nox
+        run: |
+          pip install --constraint=.github/workflows/constraints.txt nox
+          nox --version
+
+      - name: Compute pre-commit cache key
+        if: matrix.session == 'pre-commit'
+        id: pre-commit-cache
         shell: python
         run: |
           import hashlib
@@ -32,14 +66,32 @@ jobs:
           result = "${{ runner.os }}-{}-{}-pre-commit".format(python, digest[:8])
 
           print("::set-output name=result::{}".format(result))
-      - uses: actions/cache@v1.2.0
-        if: matrix.os != 'windows-latest'
+
+      - name: Restore pre-commit cache
+        uses: actions/cache@v2
+        if: matrix.session == 'pre-commit'
         with:
           path: ~/.cache/pre-commit
-          key: ${{ steps.cache_key_prefix.outputs.result }}-${{ hashFiles('.pre-commit-config.yaml') }}
+          key: ${{ steps.pre-commit-cache.outputs.result }}-${{ hashFiles('.pre-commit-config.yaml') }}
           restore-keys: |
-            ${{ steps.cache_key_prefix.outputs.result }}-
-      - run: |
-          pip install --constraint=.github/workflows/constraints.txt pip
-          pip install --constraint=.github/workflows/constraints.txt nox poetry
-      - run: nox --force-color
+            ${{ steps.pre-commit-cache.outputs.result }}-
+
+      - name: Run Nox
+        run: |
+          nox --force-color --python=${{ matrix.python-version }}
+
+      - name: Upload documentation
+        if: matrix.session == 'docs'
+        uses: actions/upload-artifact@v2
+        with:
+          name: docs
+          path: docs/_build
+
+      - name: Create coverage report
+        if: always() && matrix.session == 'tests'
+        run: |
+          nox --force-color --session=coverage -- xml
+
+      - name: Upload coverage report
+        if: always() && matrix.session == 'tests'
+        uses: codecov/codecov-action@v1.0.10
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 55433abf..76a22c8a 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,33 +1,51 @@
 repos:
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.0.0
+  - repo: local
     hooks:
+      - id: black
+        name: black
+        entry: black
+        language: system
+        types: [python]
+        require_serial: true
+      - id: check-added-large-files
+        name: Check for added large files
+        entry: check-added-large-files
+        language: system
       - id: check-toml
+        name: Check Toml
+        entry: check-toml
+        language: system
+        types: [toml]
       - id: check-yaml
+        name: Check Yaml
+        entry: check-yaml
+        language: system
+        types: [yaml]
       - id: end-of-file-fixer
+        name: Fix End of Files
+        entry: end-of-file-fixer
+        language: system
+        types: [text]
+        stages: [commit, push, manual]
+      - id: flake8
+        name: flake8
+        entry: flake8
+        language: system
+        types: [python]
+        require_serial: true
+      - id: reorder-python-imports
+        name: Reorder python imports
+        entry: reorder-python-imports
+        language: system
+        types: [python]
+        args: [--application-directories=src]
       - id: trailing-whitespace
-      - id: check-added-large-files
+        name: Trim Trailing Whitespace
+        entry: trailing-whitespace-fixer
+        language: system
+        types: [text]
+        stages: [commit, push, manual]
   - repo: https://github.com/prettier/prettier
     rev: 2.0.5
     hooks:
       - id: prettier
-  - repo: https://github.com/psf/black
-    rev: 19.10b0
-    hooks:
-      - id: black
-  - repo: https://gitlab.com/pycqa/flake8
-    rev: 3.8.1
-    hooks:
-      - id: flake8
-        additional_dependencies:
-          - flake8-bandit==2.1.2
-          - flake8-bugbear==20.1.4
-          - flake8-docstrings==1.5.0
-          - flake8-rst-docstrings==0.0.13
-          - pep8-naming==0.10.0
-          - darglint==1.3.0
-  - repo: https://github.com/asottile/reorder_python_imports
-    rev: v2.3.0
-    hooks:
-      - id: reorder-python-imports
-        args: [--application-directories=src]
diff --git a/README.rst b/README.rst
index 8baa620f..ca864783 100644
--- a/README.rst
+++ b/README.rst
@@ -1,36 +1,36 @@
-
 nox-poetry
 ==========
 
-|Tests| |Codecov| |PyPI| |Python Version| |Read the Docs| |License| |Black| |pre-commit| |Dependabot|
+|PyPI| |Python Version| |License|
+
+|Read the Docs| |Tests| |Codecov|
+
+|pre-commit| |Black|
 
-.. |Tests| image:: https://github.com/cjolowicz/nox-poetry/workflows/Tests/badge.svg
-   :target: https://github.com/cjolowicz/nox-poetry/actions?workflow=Tests
-   :alt: Tests
-.. |Codecov| image:: https://codecov.io/gh/cjolowicz/nox-poetry/branch/master/graph/badge.svg
-   :target: https://codecov.io/gh/cjolowicz/nox-poetry
-   :alt: Codecov
 .. |PyPI| image:: https://img.shields.io/pypi/v/nox-poetry.svg
    :target: https://pypi.org/project/nox-poetry/
    :alt: PyPI
 .. |Python Version| image:: https://img.shields.io/pypi/pyversions/nox-poetry
    :target: https://pypi.org/project/nox-poetry
    :alt: Python Version
-.. |Read the Docs| image:: https://readthedocs.org/projects/nox-poetry/badge/
-   :target: https://nox-poetry.readthedocs.io/
-   :alt: Read the Docs
 .. |License| image:: https://img.shields.io/pypi/l/nox-poetry
    :target: https://opensource.org/licenses/MIT
    :alt: License
-.. |Black| image:: https://img.shields.io/badge/code%20style-black-000000.svg
-   :target: https://github.com/psf/black
-   :alt: Black
+.. |Read the Docs| image:: https://img.shields.io/readthedocs/nox-poetry/latest.svg?label=Read%20the%20Docs
+   :target: https://nox-poetry.readthedocs.io/
+   :alt: Read the documentation at https://nox-poetry.readthedocs.io/
+.. |Tests| image:: https://github.com/cjolowicz/nox-poetry/workflows/Tests/badge.svg
+   :target: https://github.com/cjolowicz/nox-poetry/actions?workflow=Tests
+   :alt: Tests
+.. |Codecov| image:: https://codecov.io/gh/cjolowicz/nox-poetry/branch/master/graph/badge.svg
+   :target: https://codecov.io/gh/cjolowicz/nox-poetry
+   :alt: Codecov
 .. |pre-commit| image:: https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white
    :target: https://github.com/pre-commit/pre-commit
    :alt: pre-commit
-.. |Dependabot| image:: https://api.dependabot.com/badges/status?host=github&repo=cjolowicz/nox-poetry
-   :target: https://dependabot.com
-   :alt: Dependabot
+.. |Black| image:: https://img.shields.io/badge/code%20style-black-000000.svg
+   :target: https://github.com/psf/black
+   :alt: Black
 
 
 Features
diff --git a/docs/reference.rst b/docs/reference.rst
index 2ca86995..11c4d362 100644
--- a/docs/reference.rst
+++ b/docs/reference.rst
@@ -1,4 +1,3 @@
-
 Reference
 =========
 
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 1c07e20b..96451c97 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-sphinx==3.0.3
+sphinx==3.1.2
diff --git a/mypy.ini b/mypy.ini
index 37db7174..dfca56c1 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -19,14 +19,8 @@ warn_unreachable = True
 warn_unused_configs = True
 warn_unused_ignores = True
 
-[mypy-noxfile]
-disallow_untyped_decorators = False
-
 [mypy-tests.*]
 disallow_untyped_decorators = False
 
-[mypy-nox.*]
-ignore_missing_imports = True
-
 [mypy-pytest]
 ignore_missing_imports = True
diff --git a/noxfile.py b/noxfile.py
index b63e0a90..676b307c 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -1,8 +1,10 @@
 """Nox sessions."""
 import contextlib
 import shutil
+import sys
 import tempfile
 from pathlib import Path
+from textwrap import dedent
 from typing import cast
 from typing import Iterator
 
@@ -12,8 +14,7 @@
 
 package = "nox_poetry"
 python_versions = ["3.8", "3.7", "3.6"]
-nox.options.sessions = "pre-commit", "safety", "mypy", "tests"
-locations = "src", "tests", "noxfile.py", "docs/conf.py"
+nox.options.sessions = "pre-commit", "safety", "mypy", "tests", "typeguard"
 
 
 class Poetry:
@@ -110,12 +111,78 @@ def install(session: Session, *args: str) -> None:
         session.install(f"--constraint={requirements}", *args)
 
 
+def activate_virtualenv_in_precommit_hooks(session: Session) -> None:
+    """Activate virtualenv in hooks installed by pre-commit.
+
+    This function patches git hooks installed by pre-commit to activate the
+    session's virtual environment. This allows pre-commit to locate hooks in
+    that environment when invoked from git.
+
+    Args:
+        session: The Session object.
+    """
+    if session.bin is None:
+        return
+
+    virtualenv = session.env.get("VIRTUAL_ENV")
+    if virtualenv is None:
+        return
+
+    hookdir = Path(".git") / "hooks"
+    if not hookdir.is_dir():
+        return
+
+    for hook in hookdir.iterdir():
+        if hook.name.endswith(".sample") or not hook.is_file():
+            continue
+
+        text = hook.read_text()
+        bindir = repr(session.bin)[1:-1]  # strip quotes
+        if not (
+            Path("A") == Path("a") and bindir.lower() in text.lower() or bindir in text
+        ):
+            continue
+
+        lines = text.splitlines()
+        if not (lines[0].startswith("#!") and "python" in lines[0].lower()):
+            continue
+
+        header = dedent(
+            f"""\
+            import os
+            os.environ["VIRTUAL_ENV"] = {virtualenv!r}
+            os.environ["PATH"] = os.pathsep.join((
+                {session.bin!r},
+                os.environ.get("PATH", ""),
+            ))
+            """
+        )
+
+        lines.insert(1, header)
+        hook.write_text("\n".join(lines))
+
+
 @nox.session(name="pre-commit", python="3.8")
 def precommit(session: Session) -> None:
     """Lint using pre-commit."""
     args = session.posargs or ["run", "--all-files", "--show-diff-on-failure"]
-    install(session, "pre-commit")
+    install(
+        session,
+        "black",
+        "darglint",
+        "flake8",
+        "flake8-bandit",
+        "flake8-bugbear",
+        "flake8-docstrings",
+        "flake8-rst-docstrings",
+        "pep8-naming",
+        "pre-commit",
+        "pre-commit-hooks",
+        "reorder-python-imports",
+    )
     session.run("pre-commit", *args)
+    if args and args[0] == "install":
+        activate_virtualenv_in_precommit_hooks(session)
 
 
 @nox.session(python="3.8")
@@ -130,19 +197,38 @@ def safety(session: Session) -> None:
 @nox.session(python=python_versions)
 def mypy(session: Session) -> None:
     """Type-check using mypy."""
-    args = session.posargs or locations
+    args = session.posargs or ["src", "tests", "docs/conf.py"]
     install_package(session)
     install(session, "mypy")
     session.run("mypy", *args)
+    if not session.posargs:
+        session.run("mypy", f"--python-executable={sys.executable}", "noxfile.py")
 
 
 @nox.session(python=python_versions)
 def tests(session: Session) -> None:
     """Run the test suite."""
-    args = session.posargs or ["--cov"]
     install_package(session)
-    install(session, "coverage[toml]", "pytest", "pytest-cov")
-    session.run("pytest", *args)
+    install(session, "coverage[toml]", "pytest")
+    try:
+        session.run("coverage", "run", "--parallel", "-m", "pytest", *session.posargs)
+    finally:
+        session.notify("coverage")
+
+
+@nox.session
+def coverage(session: Session) -> None:
+    """Produce the coverage report."""
+    # Do not use session.posargs unless this is the only session.
+    has_args = session.posargs and len(session._runner.manifest) == 1
+    args = session.posargs if has_args else ["report"]
+
+    install(session, "coverage[toml]")
+
+    if not has_args and any(Path().glob(".coverage.*")):
+        session.run("coverage", "combine")
+
+    session.run("coverage", *args)
 
 
 @nox.session(python=python_versions)
diff --git a/poetry.lock b/poetry.lock
index 0818bb82..efd52014 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -22,6 +22,17 @@ optional = false
 python-versions = "*"
 version = "0.26.2"
 
+[[package]]
+category = "dev"
+description = "Utilities for refactoring imports in python-like syntax."
+name = "aspy.refactor-imports"
+optional = false
+python-versions = ">=3.6.1"
+version = "2.1.1"
+
+[package.dependencies]
+cached-property = "*"
+
 [[package]]
 category = "dev"
 description = "Atomic file writes."
@@ -56,13 +67,56 @@ version = "2.8.0"
 [package.dependencies]
 pytz = ">=2015.7"
 
+[[package]]
+category = "dev"
+description = "Security oriented static analyser for python code."
+name = "bandit"
+optional = false
+python-versions = "*"
+version = "1.6.2"
+
+[package.dependencies]
+GitPython = ">=1.0.1"
+PyYAML = ">=3.13"
+colorama = ">=0.3.9"
+six = ">=1.10.0"
+stevedore = ">=1.20.0"
+
+[[package]]
+category = "dev"
+description = "The uncompromising code formatter."
+name = "black"
+optional = false
+python-versions = ">=3.6"
+version = "19.10b0"
+
+[package.dependencies]
+appdirs = "*"
+attrs = ">=18.1.0"
+click = ">=6.5"
+pathspec = ">=0.6,<1"
+regex = "*"
+toml = ">=0.9.4"
+typed-ast = ">=1.4.0"
+
+[package.extras]
+d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+
+[[package]]
+category = "dev"
+description = "A decorator for caching properties in classes."
+name = "cached-property"
+optional = false
+python-versions = "*"
+version = "1.5.1"
+
 [[package]]
 category = "dev"
 description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
 optional = false
 python-versions = "*"
-version = "2020.4.5.1"
+version = "2020.6.20"
 
 [[package]]
 category = "dev"
@@ -91,7 +145,7 @@ version = "7.1.2"
 [[package]]
 category = "dev"
 description = "Cross-platform colored terminal text."
-marker = "sys_platform == \"win32\""
+marker = "platform_system == \"Windows\" or sys_platform == \"win32\""
 name = "colorama"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
@@ -103,7 +157,7 @@ description = "Code coverage measurement for Python"
 name = "coverage"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "5.1"
+version = "5.2"
 
 [package.dependencies]
 [package.dependencies.toml]
@@ -113,13 +167,21 @@ version = "*"
 [package.extras]
 toml = ["toml"]
 
+[[package]]
+category = "dev"
+description = "A utility for ensuring Google-style docstrings stay up to date with the source code."
+name = "darglint"
+optional = false
+python-versions = ">=3.5,<4.0"
+version = "1.5.1"
+
 [[package]]
 category = "dev"
 description = "Distribution utilities"
 name = "distlib"
 optional = false
 python-versions = "*"
-version = "0.3.0"
+version = "0.3.1"
 
 [[package]]
 category = "dev"
@@ -153,13 +215,113 @@ optional = false
 python-versions = "*"
 version = "3.0.12"
 
+[[package]]
+category = "dev"
+description = "the modular source code checker: pep8 pyflakes and co"
+name = "flake8"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+version = "3.8.3"
+
+[package.dependencies]
+mccabe = ">=0.6.0,<0.7.0"
+pycodestyle = ">=2.6.0a1,<2.7.0"
+pyflakes = ">=2.2.0,<2.3.0"
+
+[package.dependencies.importlib-metadata]
+python = "<3.8"
+version = "*"
+
+[[package]]
+category = "dev"
+description = "Automated security testing with bandit and flake8."
+name = "flake8-bandit"
+optional = false
+python-versions = "*"
+version = "2.1.2"
+
+[package.dependencies]
+bandit = "*"
+flake8 = "*"
+flake8-polyfill = "*"
+pycodestyle = "*"
+
+[[package]]
+category = "dev"
+description = "A plugin for flake8 finding likely bugs and design problems in your program. Contains warnings that don't belong in pyflakes and pycodestyle."
+name = "flake8-bugbear"
+optional = false
+python-versions = ">=3.6"
+version = "20.1.4"
+
+[package.dependencies]
+attrs = ">=19.2.0"
+flake8 = ">=3.0.0"
+
+[[package]]
+category = "dev"
+description = "Extension for flake8 which uses pydocstyle to check docstrings"
+name = "flake8-docstrings"
+optional = false
+python-versions = "*"
+version = "1.5.0"
+
+[package.dependencies]
+flake8 = ">=3"
+pydocstyle = ">=2.1"
+
+[[package]]
+category = "dev"
+description = "Polyfill package for Flake8 plugins"
+name = "flake8-polyfill"
+optional = false
+python-versions = "*"
+version = "1.0.2"
+
+[package.dependencies]
+flake8 = "*"
+
+[[package]]
+category = "dev"
+description = "Python docstring reStructuredText (RST) validator"
+name = "flake8-rst-docstrings"
+optional = false
+python-versions = "*"
+version = "0.0.13"
+
+[package.dependencies]
+flake8 = ">=3.0.0"
+restructuredtext_lint = "*"
+
+[[package]]
+category = "dev"
+description = "Git Object Database"
+name = "gitdb"
+optional = false
+python-versions = ">=3.4"
+version = "4.0.5"
+
+[package.dependencies]
+smmap = ">=3.0.1,<4"
+
+[[package]]
+category = "dev"
+description = "Python Git Library"
+name = "gitpython"
+optional = false
+python-versions = ">=3.4"
+version = "3.1.3"
+
+[package.dependencies]
+gitdb = ">=4.0.1,<5"
+
 [[package]]
 category = "dev"
 description = "File identification library for Python"
 name = "identify"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
-version = "1.4.15"
+version = "1.4.21"
 
 [package.extras]
 license = ["editdistance"]
@@ -170,7 +332,7 @@ description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.9"
+version = "2.10"
 
 [[package]]
 category = "dev"
@@ -187,14 +349,14 @@ marker = "python_version < \"3.8\""
 name = "importlib-metadata"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.6.0"
+version = "1.7.0"
 
 [package.dependencies]
 zipp = ">=0.5"
 
 [package.extras]
 docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "importlib-resources"]
+testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
 
 [[package]]
 category = "dev"
@@ -203,13 +365,9 @@ marker = "python_version < \"3.7\""
 name = "importlib-resources"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.5.0"
+version = "3.0.0"
 
 [package.dependencies]
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = "*"
-
 [package.dependencies.zipp]
 python = "<3.8"
 version = ">=0.4"
@@ -237,11 +395,14 @@ description = "Python LiveReload is an awesome tool for web developers"
 name = "livereload"
 optional = false
 python-versions = "*"
-version = "2.6.1"
+version = "2.6.2"
 
 [package.dependencies]
 six = "*"
-tornado = "*"
+
+[package.dependencies.tornado]
+python = ">=2.8"
+version = "*"
 
 [[package]]
 category = "dev"
@@ -251,13 +412,21 @@ optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
 version = "1.1.1"
 
+[[package]]
+category = "dev"
+description = "McCabe checker, plugin for flake8"
+name = "mccabe"
+optional = false
+python-versions = "*"
+version = "0.6.1"
+
 [[package]]
 category = "dev"
 description = "More routines for operating on iterables, beyond itertools"
 name = "more-itertools"
 optional = false
 python-versions = ">=3.5"
-version = "8.2.0"
+version = "8.4.0"
 
 [[package]]
 category = "dev"
@@ -265,7 +434,7 @@ description = "Optional static typing for Python"
 name = "mypy"
 optional = false
 python-versions = ">=3.5"
-version = "0.770"
+version = "0.782"
 
 [package.dependencies]
 mypy-extensions = ">=0.4.3,<0.5.0"
@@ -289,7 +458,7 @@ description = "Node.js virtual environment builder"
 name = "nodeenv"
 optional = false
 python-versions = "*"
-version = "1.3.5"
+version = "1.4.0"
 
 [[package]]
 category = "dev"
@@ -297,12 +466,20 @@ description = "Core utilities for Python packages"
 name = "packaging"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.3"
+version = "20.4"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
 six = "*"
 
+[[package]]
+category = "dev"
+description = "Utility library for gitignore style pattern matching of file paths."
+name = "pathspec"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.8.0"
+
 [[package]]
 category = "dev"
 description = "File system general utilities"
@@ -311,6 +488,25 @@ optional = false
 python-versions = "*"
 version = "0.1.2"
 
+[[package]]
+category = "dev"
+description = "Python Build Reasonableness"
+name = "pbr"
+optional = false
+python-versions = "*"
+version = "5.4.5"
+
+[[package]]
+category = "dev"
+description = "Check PEP-8 naming conventions, plugin for flake8"
+name = "pep8-naming"
+optional = false
+python-versions = "*"
+version = "0.11.1"
+
+[package.dependencies]
+flake8-polyfill = ">=1.0.2,<2"
+
 [[package]]
 category = "dev"
 description = "plugin and hook calling mechanisms for python"
@@ -341,7 +537,7 @@ description = "A framework for managing and maintaining multi-language pre-commi
 name = "pre-commit"
 optional = false
 python-versions = ">=3.6.1"
-version = "2.4.0"
+version = "2.6.0"
 
 [package.dependencies]
 cfgv = ">=2.0.0"
@@ -359,13 +555,52 @@ version = "*"
 python = "<3.7"
 version = "*"
 
+[[package]]
+category = "dev"
+description = "Some out-of-the-box hooks for pre-commit."
+name = "pre-commit-hooks"
+optional = false
+python-versions = ">=3.6.1"
+version = "3.1.0"
+
+[package.dependencies]
+"ruamel.yaml" = ">=0.15"
+toml = "*"
+
 [[package]]
 category = "dev"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.8.1"
+version = "1.9.0"
+
+[[package]]
+category = "dev"
+description = "Python style guide checker"
+name = "pycodestyle"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.6.0"
+
+[[package]]
+category = "dev"
+description = "Python docstring style checker"
+name = "pydocstyle"
+optional = false
+python-versions = ">=3.5"
+version = "5.0.2"
+
+[package.dependencies]
+snowballstemmer = "*"
+
+[[package]]
+category = "dev"
+description = "passive checker of Python programs"
+name = "pyflakes"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "2.2.0"
 
 [[package]]
 category = "dev"
@@ -389,7 +624,7 @@ description = "pytest: simple powerful testing with Python"
 name = "pytest"
 optional = false
 python-versions = ">=3.5"
-version = "5.4.2"
+version = "5.4.3"
 
 [package.dependencies]
 atomicwrites = ">=1.0"
@@ -409,21 +644,6 @@ version = ">=0.12"
 checkqa-mypy = ["mypy (v0.761)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
-[[package]]
-category = "dev"
-description = "Pytest plugin for measuring coverage."
-name = "pytest-cov"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8.1"
-
-[package.dependencies]
-coverage = ">=4.4"
-pytest = ">=3.6"
-
-[package.extras]
-testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "virtualenv"]
-
 [[package]]
 category = "dev"
 description = "World timezone definitions, modern and historical"
@@ -440,13 +660,32 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 version = "5.3.1"
 
+[[package]]
+category = "dev"
+description = "Alternative regular expression module, to replace re."
+name = "regex"
+optional = false
+python-versions = "*"
+version = "2020.6.8"
+
+[[package]]
+category = "dev"
+description = "Tool for reordering python imports"
+name = "reorder-python-imports"
+optional = false
+python-versions = ">=3.6.1"
+version = "2.3.1"
+
+[package.dependencies]
+"aspy.refactor-imports" = ">=2.1.0"
+
 [[package]]
 category = "dev"
 description = "Python HTTP for Humans."
 name = "requests"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.23.0"
+version = "2.24.0"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
@@ -458,6 +697,43 @@ urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
 socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
 
+[[package]]
+category = "dev"
+description = "reStructuredText linter"
+name = "restructuredtext-lint"
+optional = false
+python-versions = "*"
+version = "1.3.1"
+
+[package.dependencies]
+docutils = ">=0.11,<1.0"
+
+[[package]]
+category = "dev"
+description = "ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order"
+name = "ruamel.yaml"
+optional = false
+python-versions = "*"
+version = "0.16.10"
+
+[package.dependencies]
+[package.dependencies."ruamel.yaml.clib"]
+python = "<3.9"
+version = ">=0.1.2"
+
+[package.extras]
+docs = ["ryd"]
+jinja2 = ["ruamel.yaml.jinja2 (>=0.2)"]
+
+[[package]]
+category = "dev"
+description = "C version of reader, parser and emitter for ruamel.yaml derived from libyaml"
+marker = "platform_python_implementation == \"CPython\" and python_version < \"3.9\""
+name = "ruamel.yaml.clib"
+optional = false
+python-versions = "*"
+version = "0.2.0"
+
 [[package]]
 category = "dev"
 description = "Checks installed dependencies for known vulnerabilities."
@@ -479,7 +755,15 @@ description = "Python 2 and 3 compatibility utilities"
 name = "six"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "1.14.0"
+version = "1.15.0"
+
+[[package]]
+category = "dev"
+description = "A pure Python implementation of a sliding window memory map manager"
+name = "smmap"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "3.0.4"
 
 [[package]]
 category = "dev"
@@ -495,7 +779,7 @@ description = "Python documentation generator"
 name = "sphinx"
 optional = false
 python-versions = ">=3.5"
-version = "3.0.3"
+version = "3.1.2"
 
 [package.dependencies]
 Jinja2 = ">=2.3"
@@ -518,7 +802,7 @@ sphinxcontrib-serializinghtml = "*"
 
 [package.extras]
 docs = ["sphinxcontrib-websupport"]
-lint = ["flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.770)", "docutils-stubs"]
+lint = ["flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.780)", "docutils-stubs"]
 test = ["pytest", "pytest-cov", "html5lib", "typed-ast", "cython"]
 
 [[package]]
@@ -609,6 +893,17 @@ version = "1.1.4"
 lint = ["flake8", "mypy", "docutils-stubs"]
 test = ["pytest"]
 
+[[package]]
+category = "dev"
+description = "Manage dynamic plugins for Python applications"
+name = "stevedore"
+optional = false
+python-versions = ">=3.6"
+version = "2.0.0"
+
+[package.dependencies]
+pbr = ">=2.0.0,<2.1.0 || >2.1.0"
+
 [[package]]
 category = "dev"
 description = "Python Library for Tom's Obvious, Minimal Language"
@@ -638,12 +933,12 @@ category = "dev"
 description = "Run-time type checker for Python"
 name = "typeguard"
 optional = false
-python-versions = ">=3.5.2"
-version = "2.7.1"
+python-versions = ">=3.5.3"
+version = "2.9.1"
 
 [package.extras]
 doc = ["sphinx-rtd-theme", "sphinx-autodoc-typehints (>=1.2.0)"]
-test = ["pytest", "pytest-cov", "typing-extensions"]
+test = ["pytest", "typing-extensions"]
 
 [[package]]
 category = "dev"
@@ -672,11 +967,11 @@ description = "Virtual Python Environment builder"
 name = "virtualenv"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
-version = "20.0.20"
+version = "20.0.26"
 
 [package.dependencies]
 appdirs = ">=1.4.3,<2"
-distlib = ">=0.3.0,<1"
+distlib = ">=0.3.1,<1"
 filelock = ">=3.0.0,<4"
 six = ">=1.9.0,<2"
 
@@ -686,11 +981,11 @@ version = ">=0.12,<2"
 
 [package.dependencies.importlib-resources]
 python = "<3.7"
-version = ">=1.0,<2"
+version = ">=1.0"
 
 [package.extras]
 docs = ["sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)", "proselint (>=0.10.2)"]
-testing = ["pytest (>=4)", "coverage (>=5)", "coverage-enable-subprocess (>=1)", "pytest-xdist (>=1.31.0)", "pytest-mock (>=2)", "pytest-env (>=0.6.2)", "pytest-randomly (>=1)", "pytest-timeout", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
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 [[package]]
 category = "dev"
@@ -698,7 +993,7 @@ description = "Filesystem events monitoring"
 name = "watchdog"
 optional = false
 python-versions = "*"
-version = "0.10.2"
+version = "0.10.3"
 
 [package.dependencies]
 pathtools = ">=0.1.1"
@@ -708,11 +1003,11 @@ watchmedo = ["PyYAML (>=3.10)", "argh (>=0.24.1)"]
 
 [[package]]
 category = "dev"
-description = "Measures number of Terminal column cells of wide-character codes"
+description = "Measures the displayed width of unicode strings in a terminal"
 name = "wcwidth"
 optional = false
 python-versions = "*"
-version = "0.1.9"
+version = "0.2.5"
 
 [[package]]
 category = "dev"
@@ -720,7 +1015,7 @@ description = "A rewrite of the builtin doctest module"
 name = "xdoctest"
 optional = false
 python-versions = "*"
-version = "0.12.0"
+version = "0.13.0"
 
 [package.dependencies]
 six = "*"
@@ -744,7 +1039,7 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
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 ]
 zipp = [
     {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
diff --git a/pyproject.toml b/pyproject.toml
index 216f1603..ab265637 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,6 +8,11 @@ readme = "README.rst"
 homepage = "https://github.com/cjolowicz/nox-poetry"
 repository = "https://github.com/cjolowicz/nox-poetry"
 documentation = "https://nox-poetry.readthedocs.io"
+classifiers = [
+    "Programming Language :: Python :: 3.6",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+]
 
 [tool.poetry.urls]
 Changelog = "https://github.com/cjolowicz/nox-poetry/releases"
@@ -17,16 +22,25 @@ python = "^3.6.1"
 click = "^7.0"
 
 [tool.poetry.dev-dependencies]
-pytest = "^5.4.2"
-coverage = {extras = ["toml"], version = "^5.1"}
-pytest-cov = "^2.8.1"
+pytest = "^5.4.3"
+coverage = {extras = ["toml"], version = "^5.2"}
 safety = "^1.9.0"
-mypy = "^0.770"
-typeguard = "^2.7.1"
-xdoctest = "^0.12.0"
-sphinx = "^3.0.3"
+mypy = "^0.782"
+typeguard = "^2.9.1"
+xdoctest = "^0.13.0"
+sphinx = "^3.1.2"
 sphinx-autobuild = "^0.7.1"
-pre-commit = "^2.4.0"
+pre-commit = "^2.6.0"
+flake8 = "^3.8.3"
+black = "^19.10b0"
+flake8-bandit = "^2.1.2"
+flake8-bugbear = "^20.1.4"
+flake8-docstrings = "^1.5.0"
+flake8-rst-docstrings = "^0.0.13"
+pep8-naming = "^0.11.1"
+darglint = "^1.5.1"
+reorder-python-imports = "^2.3.1"
+pre-commit-hooks = "^3.1.0"
 
 [tool.poetry.scripts]
 nox-poetry = "nox_poetry.__main__:main"

From 2f7b780fff82f33d71279057947fe2244815321a Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Wed, 20 May 2020 17:51:37 +0200
Subject: [PATCH 02/17] Remove command-line interface

---
 docs/reference.rst         |  4 ++--
 pyproject.toml             |  3 ---
 src/nox_poetry/__main__.py | 12 ------------
 tests/test_main.py         | 17 -----------------
 4 files changed, 2 insertions(+), 34 deletions(-)
 delete mode 100644 src/nox_poetry/__main__.py
 delete mode 100644 tests/test_main.py

diff --git a/docs/reference.rst b/docs/reference.rst
index 11c4d362..794571b7 100644
--- a/docs/reference.rst
+++ b/docs/reference.rst
@@ -6,8 +6,8 @@ Reference
     :backlinks: none
 
 
-nox_poetry.__main__
+nox_poetry.__init__
 -------------------
 
-.. automodule:: nox_poetry.__main__
+.. automodule:: nox_poetry.__init__
    :members:
diff --git a/pyproject.toml b/pyproject.toml
index ab265637..3b24ee8f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,9 +42,6 @@ darglint = "^1.5.1"
 reorder-python-imports = "^2.3.1"
 pre-commit-hooks = "^3.1.0"
 
-[tool.poetry.scripts]
-nox-poetry = "nox_poetry.__main__:main"
-
 [tool.coverage.paths]
 source = ["src", "*/site-packages"]
 
diff --git a/src/nox_poetry/__main__.py b/src/nox_poetry/__main__.py
deleted file mode 100644
index 8c9ab71b..00000000
--- a/src/nox_poetry/__main__.py
+++ /dev/null
@@ -1,12 +0,0 @@
-"""Command-line interface."""
-import click
-
-
-@click.command()
-@click.version_option()
-def main() -> None:
-    """nox-poetry."""
-
-
-if __name__ == "__main__":
-    main(prog_name="nox-poetry")  # pragma: no cover
diff --git a/tests/test_main.py b/tests/test_main.py
deleted file mode 100644
index f56f2be2..00000000
--- a/tests/test_main.py
+++ /dev/null
@@ -1,17 +0,0 @@
-"""Test cases for the __main__ module."""
-import pytest
-from click.testing import CliRunner
-
-from nox_poetry import __main__
-
-
-@pytest.fixture
-def runner() -> CliRunner:
-    """Fixture for invoking command-line interfaces."""
-    return CliRunner()
-
-
-def test_main_succeeds(runner: CliRunner) -> None:
-    """It exits with a status code of zero."""
-    result = runner.invoke(__main__.main)
-    assert result.exit_code == 0

From aeeda11b4ef075090af0c14c7b34f97200077a18 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Wed, 20 May 2020 17:54:02 +0200
Subject: [PATCH 03/17] Remove click from dependencies

---
 pyproject.toml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index 3b24ee8f..b73391ec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,6 @@ Changelog = "https://github.com/cjolowicz/nox-poetry/releases"
 
 [tool.poetry.dependencies]
 python = "^3.6.1"
-click = "^7.0"
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.4.3"

From 7acb798beca58c2e646c094f3b5c220272d00de9 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Sat, 1 Aug 2020 23:41:32 +0200
Subject: [PATCH 04/17] Update poetry.lock

---
 poetry.lock | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/poetry.lock b/poetry.lock
index efd52014..7f724d18 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -135,7 +135,7 @@ python-versions = "*"
 version = "3.0.4"
 
 [[package]]
-category = "main"
+category = "dev"
 description = "Composable command line interface toolkit"
 name = "click"
 optional = false
@@ -145,7 +145,7 @@ version = "7.1.2"
 [[package]]
 category = "dev"
 description = "Cross-platform colored terminal text."
-marker = "platform_system == \"Windows\" or sys_platform == \"win32\""
+marker = "sys_platform == \"win32\" or platform_system == \"Windows\""
 name = "colorama"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
@@ -1039,7 +1039,8 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "cfc67c767dd4aa60a61e0ec3fdd5d28ff8d94114b99bcc9f39ced91ba0ca32de"
+content-hash = "0d41a1a996c60640d9435378d254d27f8b88b7769ceebabde9381e8dbd638d77"
+lock-version = "1.0"
 python-versions = "^3.6.1"
 
 [metadata.files]
@@ -1244,11 +1245,6 @@ markupsafe = [
     {file = "MarkupSafe-1.1.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win32.whl", hash = "sha256:b00c1de48212e4cc9603895652c5c410df699856a2853135b3967591e4beebc2"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win_amd64.whl", hash = "sha256:9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_i686.whl", hash = "sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-win32.whl", hash = "sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b"},
-    {file = "MarkupSafe-1.1.1-cp38-cp38-win_amd64.whl", hash = "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"},
     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
 mccabe = [
@@ -1333,7 +1329,7 @@ pyflakes = [
     {file = "pyflakes-2.2.0.tar.gz", hash = "sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8"},
 ]
 pygments = [
-    {file = "Pygments-2.6.1-py3-none-any.whl", hash = "sha256:ff7a40b4860b727ab48fad6360eb351cc1b33cbf9b15a0f689ca5353e9463324"},
+    {file = "Pygments-2.6.1-py2.py3-none-any.whl", hash = "sha256:aa931c0bd5daa25c475afadb2147115134cfe501f0656828cbe7cb566c7123bc"},
     {file = "Pygments-2.6.1.tar.gz", hash = "sha256:647344a061c249a3b74e230c739f434d7ea4d8b1d5f3721bc0f3558049b38f44"},
 ]
 pyparsing = [

From 72e9537506485726c876c4681aa7a0bc24d7c956 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Thu, 21 May 2020 05:46:24 +0200
Subject: [PATCH 05/17] Add implementation

---
 src/nox_poetry/__init__.py | 97 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 96 insertions(+), 1 deletion(-)

diff --git a/src/nox_poetry/__init__.py b/src/nox_poetry/__init__.py
index 0f0596ca..59c861a2 100644
--- a/src/nox_poetry/__init__.py
+++ b/src/nox_poetry/__init__.py
@@ -1 +1,96 @@
-"""nox-poetry."""
+"""Using Poetry in Nox sessions."""
+import contextlib
+import tempfile
+from pathlib import Path
+from typing import Iterator
+
+from nox.sessions import Session
+
+
+class _Poetry:
+    """Helper class for invoking Poetry inside a Nox session.
+
+    Attributes:
+        session: The Session object.
+    """
+
+    def __init__(self, session: Session) -> None:
+        """Constructor."""
+        self.session = session
+
+    def install(self, *args: str) -> None:
+        """Install the dependencies."""
+        self.session.run("poetry", "install", *args, external=True)
+
+    @contextlib.contextmanager
+    def export(self, *args: str) -> Iterator[Path]:
+        """Export the lock file to requirements format.
+
+        Args:
+            args: Command-line arguments for ``poetry export``.
+
+        Yields:
+            The path to the requirements file.
+        """
+        with tempfile.TemporaryDirectory() as directory:
+            requirements = Path(directory) / "requirements.txt"
+            self.session.run(
+                "poetry",
+                "export",
+                *args,
+                "--format=requirements.txt",
+                f"--output={requirements}",
+                external=True,
+            )
+            yield requirements
+
+    def build(self, *args: str) -> str:
+        """Build the package.
+
+        Args:
+            args: Command-line arguments for ``poetry build``.
+
+        Returns:
+            The basename of the wheel built by Poetry.
+        """
+        output = self.session.run(
+            "poetry", "build", *args, external=True, silent=True, stderr=None
+        )
+        assert isinstance(output, str)  # noqa: S101
+        return output.split()[-1]
+
+
+def install_package(session: Session) -> None:
+    """Build and install the package.
+
+    Build a wheel from the package, and install it into the virtual environment
+    of the specified Nox session.
+
+    The package requirements are installed using the versions specified in
+    Poetry's lock file.
+
+    Args:
+        session: The Session object.
+    """
+    poetry = _Poetry(session)
+
+    poetry.install("--no-root")
+    wheel = poetry.build("--format=wheel")
+
+    session.install("--no-deps", "--force-reinstall", f"dist/{wheel}")
+
+
+def install(session: Session, *args: str) -> None:
+    """Install development dependencies into the session's virtual environment.
+
+    This function is a wrapper for nox.sessions.Session.install.
+
+    The packages must be managed as development dependencies in Poetry.
+
+    Args:
+        session: The Session object.
+        args: Command-line arguments for ``pip install``.
+    """
+    poetry = _Poetry(session)
+    with poetry.export("--dev") as requirements:
+        session.install(f"--constraint={requirements}", *args)

From 66bee11d748b4c74f6c539edf112986a094e6426 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Thu, 21 May 2020 05:46:35 +0200
Subject: [PATCH 06/17] Use this project in its own noxfile.py

---
 noxfile.py | 106 ++++-------------------------------------------------
 1 file changed, 7 insertions(+), 99 deletions(-)

diff --git a/noxfile.py b/noxfile.py
index 676b307c..ba239c1b 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -1,116 +1,24 @@
 """Nox sessions."""
-import contextlib
 import shutil
 import sys
-import tempfile
 from pathlib import Path
 from textwrap import dedent
-from typing import cast
-from typing import Iterator
 
 import nox
 from nox.sessions import Session
 
+sys.path.insert(0, "src")
+
+from nox_poetry import _Poetry
+from nox_poetry import install
+from nox_poetry import install_package
+
 
 package = "nox_poetry"
 python_versions = ["3.8", "3.7", "3.6"]
 nox.options.sessions = "pre-commit", "safety", "mypy", "tests", "typeguard"
 
 
-class Poetry:
-    """Helper class for invoking Poetry inside a Nox session.
-
-    Attributes:
-        session: The Session object.
-    """
-
-    def __init__(self, session: Session) -> None:
-        """Constructor."""
-        self.session = session
-
-    @contextlib.contextmanager
-    def export(self, *args: str) -> Iterator[Path]:
-        """Export the lock file to requirements format.
-
-        Args:
-            args: Command-line arguments for ``poetry export``.
-
-        Yields:
-            The path to the requirements file.
-        """
-        with tempfile.TemporaryDirectory() as directory:
-            requirements = Path(directory) / "requirements.txt"
-            self.session.run(
-                "poetry",
-                "export",
-                *args,
-                "--format=requirements.txt",
-                f"--output={requirements}",
-                external=True,
-            )
-            yield requirements
-
-    def version(self) -> str:
-        """Retrieve the package version.
-
-        Returns:
-            The package version.
-        """
-        output = self.session.run(
-            "poetry", "version", external=True, silent=True, stderr=None
-        )
-        return cast(str, output).split()[1]
-
-    def build(self, *args: str) -> None:
-        """Build the package.
-
-        Args:
-            args: Command-line arguments for ``poetry build``.
-        """
-        self.session.run("poetry", "build", *args, external=True)
-
-
-def install_package(session: Session) -> None:
-    """Build and install the package.
-
-    Build a wheel from the package, and install it into the virtual environment
-    of the specified Nox session.
-
-    The package requirements are installed using the versions specified in
-    Poetry's lock file.
-
-    Args:
-        session: The Session object.
-    """
-    poetry = Poetry(session)
-
-    with poetry.export() as requirements:
-        session.install(f"--requirement={requirements}")
-
-    poetry.build("--format=wheel")
-
-    version = poetry.version()
-    session.install(
-        "--no-deps", "--force-reinstall", f"dist/{package}-{version}-py3-none-any.whl"
-    )
-
-
-def install(session: Session, *args: str) -> None:
-    """Install development dependencies into the session's virtual environment.
-
-    This function is a wrapper for nox.sessions.Session.install.
-
-    The packages must be managed as development dependencies in Poetry.
-
-    Args:
-        session: The Session object.
-        args: Command-line arguments for ``pip install``.
-    """
-    poetry = Poetry(session)
-    with poetry.export("--dev") as requirements:
-        session.install(f"--constraint={requirements}", *args)
-
-
 def activate_virtualenv_in_precommit_hooks(session: Session) -> None:
     """Activate virtualenv in hooks installed by pre-commit.
 
@@ -188,7 +96,7 @@ def precommit(session: Session) -> None:
 @nox.session(python="3.8")
 def safety(session: Session) -> None:
     """Scan dependencies for insecure packages."""
-    poetry = Poetry(session)
+    poetry = _Poetry(session)
     with poetry.export("--dev", "--without-hashes") as requirements:
         install(session, "safety")
         session.run("safety", "check", f"--file={requirements}", "--bare")

From 1daf8e9db837834df98040405955b8f5cd6e43fe Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Sat, 1 Aug 2020 23:46:48 +0200
Subject: [PATCH 07/17] Ignore E402

---
 noxfile.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/noxfile.py b/noxfile.py
index ba239c1b..9b8d0000 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -9,9 +9,9 @@
 
 sys.path.insert(0, "src")
 
-from nox_poetry import _Poetry
-from nox_poetry import install
-from nox_poetry import install_package
+from nox_poetry import _Poetry  # noqa: E402
+from nox_poetry import install  # noqa: E402
+from nox_poetry import install_package  # noqa: E402
 
 
 package = "nox_poetry"

From c628fc592acc7b4a632752b76f01ee36224cb483 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Sat, 1 Aug 2020 23:49:35 +0200
Subject: [PATCH 08/17] Add nox 2020.5.24

---
 poetry.lock    | 82 +++++++++++++++++++++++++++++++++++++++++++-------
 pyproject.toml |  1 +
 2 files changed, 72 insertions(+), 11 deletions(-)

diff --git a/poetry.lock b/poetry.lock
index 7f724d18..9a2db849 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -7,13 +7,29 @@ python-versions = "*"
 version = "0.7.12"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
 name = "appdirs"
 optional = false
 python-versions = "*"
 version = "1.4.4"
 
+[[package]]
+category = "main"
+description = "Bash tab completion for argparse"
+name = "argcomplete"
+optional = false
+python-versions = "*"
+version = "1.12.0"
+
+[package.dependencies]
+[package.dependencies.importlib-metadata]
+python = ">=3.6,<3.7"
+version = ">=0.23,<2"
+
+[package.extras]
+test = ["coverage", "flake8", "pexpect", "wheel"]
+
 [[package]]
 category = "dev"
 description = "An unobtrusive argparse wrapper with natural syntax"
@@ -143,7 +159,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 version = "7.1.2"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Cross-platform colored terminal text."
 marker = "sys_platform == \"win32\" or platform_system == \"Windows\""
 name = "colorama"
@@ -151,6 +167,17 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 version = "0.4.3"
 
+[[package]]
+category = "main"
+description = "Log formatting with colors!"
+name = "colorlog"
+optional = false
+python-versions = "*"
+version = "4.2.1"
+
+[package.dependencies]
+colorama = "*"
+
 [[package]]
 category = "dev"
 description = "Code coverage measurement for Python"
@@ -176,7 +203,7 @@ python-versions = ">=3.5,<4.0"
 version = "1.5.1"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Distribution utilities"
 name = "distlib"
 optional = false
@@ -208,7 +235,7 @@ toml = "*"
 pipenv = ["pipenv"]
 
 [[package]]
-category = "dev"
+category = "main"
 description = "A platform independent file lock."
 name = "filelock"
 optional = false
@@ -343,7 +370,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "1.2.0"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Read metadata from Python packages"
 marker = "python_version < \"3.8\""
 name = "importlib-metadata"
@@ -359,7 +386,7 @@ docs = ["sphinx", "rst.linker"]
 testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Read resources from Python packages"
 marker = "python_version < \"3.7\""
 name = "importlib-resources"
@@ -460,6 +487,27 @@ optional = false
 python-versions = "*"
 version = "1.4.0"
 
+[[package]]
+category = "main"
+description = "Flexible test automation."
+name = "nox"
+optional = false
+python-versions = ">=3.5"
+version = "2020.5.24"
+
+[package.dependencies]
+argcomplete = ">=1.9.4,<2.0"
+colorlog = ">=2.6.1,<5.0.0"
+py = ">=1.4.0,<2.0.0"
+virtualenv = ">=14.0.0"
+
+[package.dependencies.importlib-metadata]
+python = "<3.8"
+version = "*"
+
+[package.extras]
+tox_to_nox = ["jinja2", "tox"]
+
 [[package]]
 category = "dev"
 description = "Core utilities for Python packages"
@@ -568,7 +616,7 @@ version = "3.1.0"
 toml = "*"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
 optional = false
@@ -750,7 +798,7 @@ requests = "*"
 setuptools = "*"
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Python 2 and 3 compatibility utilities"
 name = "six"
 optional = false
@@ -962,7 +1010,7 @@ secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0
 socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Virtual Python Environment builder"
 name = "virtualenv"
 optional = false
@@ -1026,7 +1074,7 @@ optional = ["pygments", "colorama"]
 tests = ["pytest", "pytest-cov", "codecov", "scikit-build", "cmake", "ninja", "pybind11"]
 
 [[package]]
-category = "dev"
+category = "main"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 marker = "python_version < \"3.8\""
 name = "zipp"
@@ -1039,7 +1087,7 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
-content-hash = "0d41a1a996c60640d9435378d254d27f8b88b7769ceebabde9381e8dbd638d77"
+content-hash = "2b609d88ef1aeee1d48d8f4d337013a72cfe3aaa7aab305858350082d53bf894"
 lock-version = "1.0"
 python-versions = "^3.6.1"
 
@@ -1052,6 +1100,10 @@ appdirs = [
     {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
     {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
 ]
+argcomplete = [
+    {file = "argcomplete-1.12.0-py2.py3-none-any.whl", hash = "sha256:91dc7f9c7f6281d5a0dce5e73d2e33283aaef083495c13974a7dd197a1cdc949"},
+    {file = "argcomplete-1.12.0.tar.gz", hash = "sha256:2fbe5ed09fd2c1d727d4199feca96569a5b50d44c71b16da9c742201f7cc295c"},
+]
 argh = [
     {file = "argh-0.26.2-py2.py3-none-any.whl", hash = "sha256:a9b3aaa1904eeb78e32394cd46c6f37ac0fb4af6dc488daa58971bdc7d7fcaf3"},
     {file = "argh-0.26.2.tar.gz", hash = "sha256:e9535b8c84dc9571a48999094fda7f33e63c3f1b74f3e5f3ac0105a58405bb65"},
@@ -1104,6 +1156,10 @@ colorama = [
     {file = "colorama-0.4.3-py2.py3-none-any.whl", hash = "sha256:7d73d2a99753107a36ac6b455ee49046802e59d9d076ef8e47b61499fa29afff"},
     {file = "colorama-0.4.3.tar.gz", hash = "sha256:e96da0d330793e2cb9485e9ddfd918d456036c7149416295932478192f4436a1"},
 ]
+colorlog = [
+    {file = "colorlog-4.2.1-py2.py3-none-any.whl", hash = "sha256:43597fd822ce705190fc997519342fdaaf44b9b47f896ece7aa153ed4b909c74"},
+    {file = "colorlog-4.2.1.tar.gz", hash = "sha256:75e55822c3a3387d721579241e776de2cf089c9ef9528b1f09e8b04d403ad118"},
+]
 coverage = [
     {file = "coverage-5.2-cp27-cp27m-macosx_10_13_intel.whl", hash = "sha256:d9ad0a988ae20face62520785ec3595a5e64f35a21762a57d115dae0b8fb894a"},
     {file = "coverage-5.2-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:4bb385a747e6ae8a65290b3df60d6c8a692a5599dc66c9fa3520e667886f2e10"},
@@ -1278,6 +1334,10 @@ mypy-extensions = [
 nodeenv = [
     {file = "nodeenv-1.4.0-py2.py3-none-any.whl", hash = "sha256:4b0b77afa3ba9b54f4b6396e60b0c83f59eaeb2d63dc3cc7a70f7f4af96c82bc"},
 ]
+nox = [
+    {file = "nox-2020.5.24-py3-none-any.whl", hash = "sha256:c4509621fead99473a1401870e680b0aadadce5c88440f0532863595176d64c1"},
+    {file = "nox-2020.5.24.tar.gz", hash = "sha256:61a55705736a1a73efbd18d5b262a43d55a1176546e0eb28b29064cfcffe26c0"},
+]
 packaging = [
     {file = "packaging-20.4-py2.py3-none-any.whl", hash = "sha256:998416ba6962ae7fbd6596850b80e17859a5753ba17c32284f67bfff33784181"},
     {file = "packaging-20.4.tar.gz", hash = "sha256:4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8"},
diff --git a/pyproject.toml b/pyproject.toml
index b73391ec..fe1e01a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,6 +19,7 @@ Changelog = "https://github.com/cjolowicz/nox-poetry/releases"
 
 [tool.poetry.dependencies]
 python = "^3.6.1"
+nox = "^2020.5.24"
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.4.3"

From 121752a10f956425eaf71e5e072d047cfe3a0e14 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Sat, 1 Aug 2020 23:52:49 +0200
Subject: [PATCH 09/17] Import nox_poetry from the Nox installation

---
 noxfile.py | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/noxfile.py b/noxfile.py
index 9b8d0000..b696f4c5 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -7,11 +7,9 @@
 import nox
 from nox.sessions import Session
 
-sys.path.insert(0, "src")
-
-from nox_poetry import _Poetry  # noqa: E402
-from nox_poetry import install  # noqa: E402
-from nox_poetry import install_package  # noqa: E402
+from nox_poetry import _Poetry
+from nox_poetry import install
+from nox_poetry import install_package
 
 
 package = "nox_poetry"

From 5fd3b9080d8903180a59cbb0fb365d58a716b23b Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Sat, 1 Aug 2020 23:55:33 +0200
Subject: [PATCH 10/17] Install nox-poetry in Tests workflow

---
 .github/workflows/tests.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a2c2994e..41d3b01f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -52,6 +52,10 @@ jobs:
           pip install --constraint=.github/workflows/constraints.txt nox
           nox --version
 
+      - name: Install nox-poetry
+        run: |
+          pip install .
+
       - name: Compute pre-commit cache key
         if: matrix.session == 'pre-commit'
         id: pre-commit-cache

From de65743e5bf299c13d25f4d21ba1094adb75e163 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Sun, 2 Aug 2020 00:11:16 +0200
Subject: [PATCH 11/17] Add fake tests

---
 tests/test_nox_poetry.py | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 tests/test_nox_poetry.py

diff --git a/tests/test_nox_poetry.py b/tests/test_nox_poetry.py
new file mode 100644
index 00000000..eb647458
--- /dev/null
+++ b/tests/test_nox_poetry.py
@@ -0,0 +1,32 @@
+"""Tests."""
+from typing import Any
+from typing import cast
+
+from nox.sessions import Session
+
+from nox_poetry import install
+from nox_poetry import install_package
+
+
+class FakeSession:
+    """Fake session."""
+
+    def run(self, *args: str, **kargs: Any) -> str:
+        """Run."""
+        return "example.whl"
+
+    def install(self, *args: str, **kargs: Any) -> None:
+        """Install."""
+        pass
+
+
+def test_install() -> None:
+    """It installs."""
+    session = cast(Session, FakeSession())
+    install(session, "pip")
+
+
+def test_install_package() -> None:
+    """It installs."""
+    session = cast(Session, FakeSession())
+    install_package(session)

From 34597da1ce6ef2639cfeed420a6da82f2f42aa56 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Fri, 25 Sep 2020 16:33:57 +0200
Subject: [PATCH 12/17] Update cookiecutter-hypermodern-python to 2020.9.15

---
 .flake8                           |   2 +-
 .github/workflows/constraints.txt |   8 +-
 .github/workflows/release.yml     |   4 +-
 .github/workflows/tests.yml       |  10 +-
 .pre-commit-config.yaml           |   2 +-
 CONTRIBUTING.rst                  |   5 +-
 docs/requirements.txt             |   2 +-
 mypy.ini                          |   6 +-
 noxfile.py                        |  47 ++++--
 poetry.lock                       | 260 +++++++++++++-----------------
 pyproject.toml                    |  20 +--
 src/nox_poetry/__init__.py        |  73 +++++----
 tests/test_nox_poetry.py          |   4 +
 13 files changed, 220 insertions(+), 223 deletions(-)

diff --git a/.flake8 b/.flake8
index 8295d18d..9b47ccb6 100644
--- a/.flake8
+++ b/.flake8
@@ -1,6 +1,6 @@
 [flake8]
 select = B,B9,C,D,DAR,E,F,N,RST,S,W
-ignore = E203,E501,W503
+ignore = E203,E501,RST203,RST301,W503
 max-line-length = 80
 max-complexity = 10
 docstring-convention = google
diff --git a/.github/workflows/constraints.txt b/.github/workflows/constraints.txt
index 80c9f8dc..ce409116 100644
--- a/.github/workflows/constraints.txt
+++ b/.github/workflows/constraints.txt
@@ -1,4 +1,4 @@
-pip==20.1.1
-nox==2020.5.24
-poetry==1.0.9
-virtualenv==20.0.26
+pip==20.2.3
+nox==2020.8.22
+poetry==1.0.10
+virtualenv==20.0.31
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 182ef749..bd64a241 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,12 +11,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v2.3.1
+        uses: actions/checkout@v2.3.2
         with:
           fetch-depth: 2
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v2.1.2
         with:
           python-version: "3.8"
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 41d3b01f..3c83994d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -23,17 +23,17 @@ jobs:
           - { python-version: 3.8, os: windows-latest, session: "tests" }
           - { python-version: 3.8, os: macos-latest, session: "tests" }
           - { python-version: 3.8, os: ubuntu-latest, session: "typeguard" }
-          - { python-version: 3.8, os: ubuntu-latest, session: "docs" }
+          - { python-version: 3.8, os: ubuntu-latest, session: "docs-build" }
 
     env:
       NOXSESSION: ${{ matrix.session }}
 
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v2.3.1
+        uses: actions/checkout@v2.3.2
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v2.1.2
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -85,7 +85,7 @@ jobs:
           nox --force-color --python=${{ matrix.python-version }}
 
       - name: Upload documentation
-        if: matrix.session == 'docs'
+        if: matrix.session == 'docs-build'
         uses: actions/upload-artifact@v2
         with:
           name: docs
@@ -98,4 +98,4 @@ jobs:
 
       - name: Upload coverage report
         if: always() && matrix.session == 'tests'
-        uses: codecov/codecov-action@v1.0.10
+        uses: codecov/codecov-action@v1.0.13
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 76a22c8a..7081d5e6 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -46,6 +46,6 @@ repos:
         types: [text]
         stages: [commit, push, manual]
   - repo: https://github.com/prettier/prettier
-    rev: 2.0.5
+    rev: 2.1.1
     hooks:
       - id: prettier
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index c591ffa1..91549456 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -107,16 +107,15 @@ Your pull request needs to meet the following guidelines for acceptance:
 
 Feel free to submit early, though—we can always iterate on this.
 
-You can ensure that your changes adhere to the code style by reformatting with Black_:
+To run linting and code formatting checks before commiting your change, you can install pre-commit as a Git hook by running the following command:
 
 .. code:: console
 
-   $ nox --session=black
+   $ nox --session=pre-commit -- install
 
 It is recommended to open an issue before starting work on anything.
 This will allow a chance to talk it over with the owners and validate your approach.
 
 .. _pull request: https://github.com/cjolowicz/nox-poetry/pulls
-.. _Black: https://black.readthedocs.io/
 .. github-only
 .. _Code of Conduct: CODE_OF_CONDUCT.rst
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 96451c97..89eb0be0 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-sphinx==3.1.2
+sphinx==3.2.1
diff --git a/mypy.ini b/mypy.ini
index dfca56c1..01202bca 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -19,8 +19,8 @@ warn_unreachable = True
 warn_unused_configs = True
 warn_unused_ignores = True
 
-[mypy-tests.*]
-disallow_untyped_decorators = False
-
 [mypy-pytest]
 ignore_missing_imports = True
+
+[mypy-tests.*]
+disallow_untyped_decorators = False
diff --git a/noxfile.py b/noxfile.py
index b696f4c5..a43acebc 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -7,14 +7,21 @@
 import nox
 from nox.sessions import Session
 
-from nox_poetry import _Poetry
+from nox_poetry import export_requirements
 from nox_poetry import install
 from nox_poetry import install_package
 
 
 package = "nox_poetry"
 python_versions = ["3.8", "3.7", "3.6"]
-nox.options.sessions = "pre-commit", "safety", "mypy", "tests", "typeguard"
+nox.options.sessions = (
+    "pre-commit",
+    "safety",
+    "mypy",
+    "tests",
+    "typeguard",
+    "docs-build",
+)
 
 
 def activate_virtualenv_in_precommit_hooks(session: Session) -> None:
@@ -94,10 +101,9 @@ def precommit(session: Session) -> None:
 @nox.session(python="3.8")
 def safety(session: Session) -> None:
     """Scan dependencies for insecure packages."""
-    poetry = _Poetry(session)
-    with poetry.export("--dev", "--without-hashes") as requirements:
-        install(session, "safety")
-        session.run("safety", "check", f"--file={requirements}", "--bare")
+    install(session, "safety")
+    requirements = export_requirements(session, dev=True)
+    session.run("safety", "check", f"--file={requirements}", "--bare")
 
 
 @nox.session(python=python_versions)
@@ -154,22 +160,29 @@ def xdoctest(session: Session) -> None:
     session.run("python", "-m", "xdoctest", package, *args)
 
 
-@nox.session(python="3.8")
-def docs(session: Session) -> None:
+@nox.session(name="docs-build", python="3.8")
+def docs_build(session: Session) -> None:
     """Build the documentation."""
     args = session.posargs or ["docs", "docs/_build"]
+    install_package(session)
+    install(session, "sphinx")
+
+    build_dir = Path("docs", "_build")
+    if build_dir.exists():
+        shutil.rmtree(build_dir)
 
-    if session.interactive and not session.posargs:
-        args.insert(0, "--open-browser")
+    session.run("sphinx-build", *args)
 
-    builddir = Path("docs", "_build")
-    if builddir.exists():
-        shutil.rmtree(builddir)
 
+@nox.session(python="3.8")
+def docs(session: Session) -> None:
+    """Build and serve the documentation with live reloading on file changes."""
+    args = session.posargs or ["--open-browser", "docs", "docs/_build"]
     install_package(session)
     install(session, "sphinx", "sphinx-autobuild")
 
-    if session.interactive:
-        session.run("sphinx-autobuild", *args)
-    else:
-        session.run("sphinx-build", *args)
+    build_dir = Path("docs", "_build")
+    if build_dir.exists():
+        shutil.rmtree(build_dir)
+
+    session.run("sphinx-autobuild", *args)
diff --git a/poetry.lock b/poetry.lock
index 9a2db849..1803f730 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -30,14 +30,6 @@ version = ">=0.23,<2"
 [package.extras]
 test = ["coverage", "flake8", "pexpect", "wheel"]
 
-[[package]]
-category = "dev"
-description = "An unobtrusive argparse wrapper with natural syntax"
-name = "argh"
-optional = false
-python-versions = "*"
-version = "0.26.2"
-
 [[package]]
 category = "dev"
 description = "Utilities for refactoring imports in python-like syntax."
@@ -104,18 +96,24 @@ description = "The uncompromising code formatter."
 name = "black"
 optional = false
 python-versions = ">=3.6"
-version = "19.10b0"
+version = "20.8b1"
 
 [package.dependencies]
 appdirs = "*"
-attrs = ">=18.1.0"
-click = ">=6.5"
+click = ">=7.1.2"
+mypy-extensions = ">=0.4.3"
 pathspec = ">=0.6,<1"
-regex = "*"
-toml = ">=0.9.4"
+regex = ">=2020.1.8"
+toml = ">=0.10.1"
 typed-ast = ">=1.4.0"
+typing-extensions = ">=3.7.4"
+
+[package.dependencies.dataclasses]
+python = "<3.7"
+version = ">=0.6"
 
 [package.extras]
+colorama = ["colorama (>=0.4.3)"]
 d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
 [[package]]
@@ -184,7 +182,7 @@ description = "Code coverage measurement for Python"
 name = "coverage"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "5.2"
+version = "5.3"
 
 [package.dependencies]
 [package.dependencies.toml]
@@ -200,7 +198,16 @@ description = "A utility for ensuring Google-style docstrings stay up to date wi
 name = "darglint"
 optional = false
 python-versions = ">=3.5,<4.0"
-version = "1.5.1"
+version = "1.5.4"
+
+[[package]]
+category = "dev"
+description = "A backport of the dataclasses module for Python 3.6"
+marker = "python_version < \"3.7\""
+name = "dataclasses"
+optional = false
+python-versions = "*"
+version = "0.6"
 
 [[package]]
 category = "main"
@@ -402,6 +409,14 @@ version = ">=0.4"
 [package.extras]
 docs = ["sphinx", "rst.linker", "jaraco.packaging"]
 
+[[package]]
+category = "dev"
+description = "iniconfig: brain-dead simple config-ini parsing"
+name = "iniconfig"
+optional = false
+python-versions = "*"
+version = "1.0.1"
+
 [[package]]
 category = "dev"
 description = "A very fast and expressive template engine."
@@ -528,14 +543,6 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 version = "0.8.0"
 
-[[package]]
-category = "dev"
-description = "File system general utilities"
-name = "pathtools"
-optional = false
-python-versions = "*"
-version = "0.1.2"
-
 [[package]]
 category = "dev"
 description = "Python Build Reasonableness"
@@ -571,21 +578,13 @@ version = ">=0.12"
 [package.extras]
 dev = ["pre-commit", "tox"]
 
-[[package]]
-category = "dev"
-description = "Utility that helps with local TCP ports managment. It can find an unused TCP localhost port and remember the association."
-name = "port-for"
-optional = false
-python-versions = "*"
-version = "0.3.1"
-
 [[package]]
 category = "dev"
 description = "A framework for managing and maintaining multi-language pre-commit hooks."
 name = "pre-commit"
 optional = false
 python-versions = ">=3.6.1"
-version = "2.6.0"
+version = "2.7.1"
 
 [package.dependencies]
 cfgv = ">=2.0.0"
@@ -609,7 +608,7 @@ description = "Some out-of-the-box hooks for pre-commit."
 name = "pre-commit-hooks"
 optional = false
 python-versions = ">=3.6.1"
-version = "3.1.0"
+version = "3.2.0"
 
 [package.dependencies]
 "ruamel.yaml" = ">=0.15"
@@ -672,24 +671,25 @@ description = "pytest: simple powerful testing with Python"
 name = "pytest"
 optional = false
 python-versions = ">=3.5"
-version = "5.4.3"
+version = "6.0.2"
 
 [package.dependencies]
 atomicwrites = ">=1.0"
 attrs = ">=17.4.0"
 colorama = "*"
+iniconfig = "*"
 more-itertools = ">=4.0.0"
 packaging = "*"
 pluggy = ">=0.12,<1.0"
-py = ">=1.5.0"
-wcwidth = "*"
+py = ">=1.8.2"
+toml = "*"
 
 [package.dependencies.importlib-metadata]
 python = "<3.8"
 version = ">=0.12"
 
 [package.extras]
-checkqa-mypy = ["mypy (v0.761)"]
+checkqa_mypy = ["mypy (0.780)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
@@ -722,7 +722,7 @@ description = "Tool for reordering python imports"
 name = "reorder-python-imports"
 optional = false
 python-versions = ">=3.6.1"
-version = "2.3.1"
+version = "2.3.5"
 
 [package.dependencies]
 "aspy.refactor-imports" = ">=2.1.0"
@@ -827,7 +827,7 @@ description = "Python documentation generator"
 name = "sphinx"
 optional = false
 python-versions = ">=3.5"
-version = "3.1.2"
+version = "3.2.1"
 
 [package.dependencies]
 Jinja2 = ">=2.3"
@@ -855,20 +855,18 @@ test = ["pytest", "pytest-cov", "html5lib", "typed-ast", "cython"]
 
 [[package]]
 category = "dev"
-description = "Watch a Sphinx directory and rebuild the documentation when a change is detected. Also includes a livereload enabled web server."
+description = "Rebuild Sphinx documentation on changes, with live-reload in the browser."
 name = "sphinx-autobuild"
 optional = false
-python-versions = "*"
-version = "0.7.1"
+python-versions = ">=3.6"
+version = "2020.9.1"
 
 [package.dependencies]
-PyYAML = ">=3.10"
-argh = ">=0.24.1"
-livereload = ">=2.3.0"
-pathtools = ">=0.1.2"
-port-for = "0.3.1"
-tornado = ">=3.2"
-watchdog = ">=0.7.1"
+livereload = "*"
+sphinx = "*"
+
+[package.extras]
+test = ["pytest", "pytest-cov"]
 
 [[package]]
 category = "dev"
@@ -963,6 +961,7 @@ version = "0.10.1"
 [[package]]
 category = "dev"
 description = "Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed."
+marker = "python_version > \"2.7\""
 name = "tornado"
 optional = false
 python-versions = ">= 3.5"
@@ -1035,43 +1034,23 @@ version = ">=1.0"
 docs = ["sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)", "proselint (>=0.10.2)"]
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-[[package]]
-category = "dev"
-description = "Filesystem events monitoring"
-name = "watchdog"
-optional = false
-python-versions = "*"
-version = "0.10.3"
-
-[package.dependencies]
-pathtools = ">=0.1.1"
-
-[package.extras]
-watchmedo = ["PyYAML (>=3.10)", "argh (>=0.24.1)"]
-
-[[package]]
-category = "dev"
-description = "Measures the displayed width of unicode strings in a terminal"
-name = "wcwidth"
-optional = false
-python-versions = "*"
-version = "0.2.5"
-
 [[package]]
 category = "dev"
 description = "A rewrite of the builtin doctest module"
 name = "xdoctest"
 optional = false
 python-versions = "*"
-version = "0.13.0"
+version = "0.15.0"
 
 [package.dependencies]
 six = "*"
 
 [package.extras]
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-optional = ["pygments", "colorama"]
-tests = ["pytest", "pytest-cov", "codecov", "scikit-build", "cmake", "ninja", "pybind11"]
+all = ["six", "pytest", "pytest-cov", "codecov", "scikit-build", "cmake", "ninja", "pybind11", "pygments", "colorama", "nbformat", "nbconvert", "jupyter-client", "ipython", "ipykernel"]
+colors = ["pygments", "colorama"]
+jupyter = ["nbformat", "nbconvert", "jupyter-client", "ipython", "ipykernel"]
+optional = ["pygments", "colorama", "nbformat", "nbconvert", "jupyter-client", "ipython", "ipykernel"]
+tests = ["pytest", "pytest-cov", "codecov", "scikit-build", "cmake", "ninja", "pybind11", "nbformat", "nbconvert", "jupyter-client", "ipython", "ipykernel"]
 
 [[package]]
 category = "main"
@@ -1087,8 +1066,7 @@ docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools", "func-timeout"]
 
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-lock-version = "1.0"
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 python-versions = "^3.6.1"
 
 [metadata.files]
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 ]
+iniconfig = [
+    {file = "iniconfig-1.0.1-py3-none-any.whl", hash = "sha256:80cf40c597eb564e86346103f609d74efce0f6b4d4f30ec8ce9e2c26411ba437"},
+    {file = "iniconfig-1.0.1.tar.gz", hash = "sha256:e5f92f89355a67de0595932a6c6c02ab4afddc6fcdc0bfc5becd0d60884d3f69"},
+]
 jinja2 = [
     {file = "Jinja2-2.11.2-py2.py3-none-any.whl", hash = "sha256:f0a4641d3cf955324a89c04f3d94663aa4d638abe8f733ecd3582848e1c37035"},
     {file = "Jinja2-2.11.2.tar.gz", hash = "sha256:89aab215427ef59c34ad58735269eb58b1a5808103067f7bb9d5836c651b3bb0"},
@@ -1346,9 +1327,6 @@ pathspec = [
     {file = "pathspec-0.8.0-py2.py3-none-any.whl", hash = "sha256:7d91249d21749788d07a2d0f94147accd8f845507400749ea19c1ec9054a12b0"},
     {file = "pathspec-0.8.0.tar.gz", hash = "sha256:da45173eb3a6f2a5a487efba21f050af2b41948be6ab52b6a1e3ff22bb8b7061"},
 ]
-pathtools = [
-    {file = "pathtools-0.1.2.tar.gz", hash = "sha256:7c35c5421a39bb82e58018febd90e3b6e5db34c5443aaaf742b3f33d4655f1c0"},
-]
 pbr = [
     {file = "pbr-5.4.5-py2.py3-none-any.whl", hash = "sha256:579170e23f8e0c2f24b0de612f71f648eccb79fb1322c814ae6b3c07b5ba23e8"},
     {file = "pbr-5.4.5.tar.gz", hash = "sha256:07f558fece33b05caf857474a366dfcc00562bca13dd8b47b2b3e22d9f9bf55c"},
@@ -1361,16 +1339,13 @@ pluggy = [
     {file = "pluggy-0.13.1-py2.py3-none-any.whl", hash = "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"},
     {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
 ]
-port-for = [
-    {file = "port-for-0.3.1.tar.gz", hash = "sha256:b16a84bb29c2954db44c29be38b17c659c9c27e33918dec16b90d375cc596f1c"},
-]
 pre-commit = [
-    {file = "pre_commit-2.6.0-py2.py3-none-any.whl", hash = "sha256:e8b1315c585052e729ab7e99dcca5698266bedce9067d21dc909c23e3ceed626"},
-    {file = "pre_commit-2.6.0.tar.gz", hash = "sha256:1657663fdd63a321a4a739915d7d03baedd555b25054449090f97bb0cb30a915"},
+    {file = "pre_commit-2.7.1-py2.py3-none-any.whl", hash = "sha256:810aef2a2ba4f31eed1941fc270e72696a1ad5590b9751839c90807d0fff6b9a"},
+    {file = "pre_commit-2.7.1.tar.gz", hash = "sha256:c54fd3e574565fe128ecc5e7d2f91279772ddb03f8729645fa812fe809084a70"},
 ]
 pre-commit-hooks = [
-    {file = "pre_commit_hooks-3.1.0-py2.py3-none-any.whl", hash = "sha256:32e07d6bd511e26ac3d7b7aafdd2e49d0f1efdb7fc772156386004b9e6f66dbe"},
-    {file = "pre_commit_hooks-3.1.0.tar.gz", hash = "sha256:78642bdda65d524a6c91faaf4b322f18fc561e4377e8651d8502c6073e4a19d9"},
+    {file = "pre_commit_hooks-3.2.0-py2.py3-none-any.whl", hash = "sha256:8a174237326576c5f2279eba18ccbf2ca2a19fcaab8844db80f576c8fe76c2c2"},
+    {file = "pre_commit_hooks-3.2.0.tar.gz", hash = "sha256:917bce8feb048f8271e3a4a900c6d780118d23e8ddf4557ddec9384c0d1dba79"},
 ]
 py = [
     {file = "py-1.9.0-py2.py3-none-any.whl", hash = "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2"},
@@ -1397,8 +1372,8 @@ pyparsing = [
     {file = "pyparsing-2.4.7.tar.gz", hash = "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1"},
 ]
 pytest = [
-    {file = "pytest-5.4.3-py3-none-any.whl", hash = "sha256:5c0db86b698e8f170ba4582a492248919255fcd4c79b1ee64ace34301fb589a1"},
-    {file = "pytest-5.4.3.tar.gz", hash = "sha256:7979331bfcba207414f5e1263b5a0f8f521d0f457318836a7355531ed1a4c7d8"},
+    {file = "pytest-6.0.2-py3-none-any.whl", hash = "sha256:0e37f61339c4578776e090c3b8f6b16ce4db333889d65d0efb305243ec544b40"},
+    {file = "pytest-6.0.2.tar.gz", hash = "sha256:c8f57c2a30983f469bf03e68cdfa74dc474ce56b8f280ddcb080dfd91df01043"},
 ]
 pytz = [
     {file = "pytz-2020.1-py2.py3-none-any.whl", hash = "sha256:a494d53b6d39c3c6e44c3bec237336e14305e4f29bbf800b599253057fbb79ed"},
@@ -1441,8 +1416,8 @@ regex = [
     {file = "regex-2020.6.8.tar.gz", hash = "sha256:e9b64e609d37438f7d6e68c2546d2cb8062f3adb27e6336bc129b51be20773ac"},
 ]
 reorder-python-imports = [
-    {file = "reorder_python_imports-2.3.1-py2.py3-none-any.whl", hash = "sha256:c0a9d60d84db9e6425d9379296d296cce78699967a6012972b8f4f074e22c3f5"},
-    {file = "reorder_python_imports-2.3.1.tar.gz", hash = "sha256:e2a4712866aee291c1c019aa67f95a3be2fffa5ebd801cab5d98ab2b66cfd512"},
+    {file = "reorder_python_imports-2.3.5-py2.py3-none-any.whl", hash = "sha256:6e8d3baba68c409ec87242757cf579a7ad2b133d1efed498be987b97ee385ac3"},
+    {file = "reorder_python_imports-2.3.5.tar.gz", hash = "sha256:7c46593d39899e3fb249248b448bde93ee7417889904f015c0c5a738c23fd0e0"},
 ]
 requests = [
     {file = "requests-2.24.0-py2.py3-none-any.whl", hash = "sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898"},
@@ -1493,12 +1468,12 @@ snowballstemmer = [
     {file = "snowballstemmer-2.0.0.tar.gz", hash = "sha256:df3bac3df4c2c01363f3dd2cfa78cce2840a79b9f1c2d2de9ce8d31683992f52"},
 ]
 sphinx = [
-    {file = "Sphinx-3.1.2-py3-none-any.whl", hash = "sha256:97dbf2e31fc5684bb805104b8ad34434ed70e6c588f6896991b2fdfd2bef8c00"},
-    {file = "Sphinx-3.1.2.tar.gz", hash = "sha256:b9daeb9b39aa1ffefc2809b43604109825300300b987a24f45976c001ba1a8fd"},
+    {file = "Sphinx-3.2.1-py3-none-any.whl", hash = "sha256:ce6fd7ff5b215af39e2fcd44d4a321f6694b4530b6f2b2109b64d120773faea0"},
+    {file = "Sphinx-3.2.1.tar.gz", hash = "sha256:321d6d9b16fa381a5306e5a0b76cd48ffbc588e6340059a729c6fdd66087e0e8"},
 ]
 sphinx-autobuild = [
-    {file = "sphinx-autobuild-0.7.1.tar.gz", hash = "sha256:66388f81884666e3821edbe05dd53a0cfb68093873d17320d0610de8db28c74e"},
-    {file = "sphinx_autobuild-0.7.1-py2-none-any.whl", hash = "sha256:e60aea0789cab02fa32ee63c7acae5ef41c06f1434d9fd0a74250a61f5994692"},
+    {file = "sphinx-autobuild-2020.9.1.tar.gz", hash = "sha256:4b184a7db893f2100bbd831991ae54ca89167a2b9ce68faea71eaa9e37716aed"},
+    {file = "sphinx_autobuild-2020.9.1-py3-none-any.whl", hash = "sha256:df5c72cb8b8fc9b31279c4619780c4e95029be6de569ff60a8bb2e99d20f63dd"},
 ]
 sphinxcontrib-applehelp = [
     {file = "sphinxcontrib-applehelp-1.0.2.tar.gz", hash = "sha256:a072735ec80e7675e3f432fcae8610ecf509c5f1869d17e2eecff44389cdbc58"},
@@ -1583,16 +1558,9 @@ virtualenv = [
     {file = "virtualenv-20.0.26-py2.py3-none-any.whl", hash = "sha256:c11a475400e98450403c0364eb3a2d25d42f71cf1493da64390487b666de4324"},
     {file = "virtualenv-20.0.26.tar.gz", hash = "sha256:e10cc66f40cbda459720dfe1d334c4dc15add0d80f09108224f171006a97a172"},
 ]
-watchdog = [
-    {file = "watchdog-0.10.3.tar.gz", hash = "sha256:4214e1379d128b0588021880ccaf40317ee156d4603ac388b9adcf29165e0c04"},
-]
-wcwidth = [
-    {file = "wcwidth-0.2.5-py2.py3-none-any.whl", hash = "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784"},
-    {file = "wcwidth-0.2.5.tar.gz", hash = "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"},
-]
 xdoctest = [
-    {file = "xdoctest-0.13.0-py2.py3-none-any.whl", hash = "sha256:de861fd5230a46bd26c054b4981169dd963f813768cb62b62e104e4d2644ac94"},
-    {file = "xdoctest-0.13.0.tar.gz", hash = "sha256:4f113a430076561a9d7f31af65b5d5acda62ee06b05cb6894264cb9efb8196ac"},
+    {file = "xdoctest-0.15.0-py2.py3-none-any.whl", hash = "sha256:695ea04303a48cbb319709270d43f7bae7f3de3701aec73f09d90a216499992e"},
+    {file = "xdoctest-0.15.0.tar.gz", hash = "sha256:7f0a184d403b69b166ebec1aadb13c98c96c59101e974ae2e4db4c3a803ec371"},
 ]
 zipp = [
     {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
diff --git a/pyproject.toml b/pyproject.toml
index fe1e01a4..1c75c904 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,25 +22,25 @@ python = "^3.6.1"
 nox = "^2020.5.24"
 
 [tool.poetry.dev-dependencies]
-pytest = "^5.4.3"
-coverage = {extras = ["toml"], version = "^5.2"}
+pytest = "^6.0.2"
+coverage = {extras = ["toml"], version = "^5.3"}
 safety = "^1.9.0"
 mypy = "^0.782"
 typeguard = "^2.9.1"
-xdoctest = "^0.13.0"
-sphinx = "^3.1.2"
-sphinx-autobuild = "^0.7.1"
-pre-commit = "^2.6.0"
+xdoctest = "^0.15.0"
+sphinx = "^3.2.1"
+sphinx-autobuild = "^2020.9.1"
+pre-commit = "^2.7.1"
 flake8 = "^3.8.3"
-black = "^19.10b0"
+black = "^20.8b1"
 flake8-bandit = "^2.1.2"
 flake8-bugbear = "^20.1.4"
 flake8-docstrings = "^1.5.0"
 flake8-rst-docstrings = "^0.0.13"
 pep8-naming = "^0.11.1"
-darglint = "^1.5.1"
-reorder-python-imports = "^2.3.1"
-pre-commit-hooks = "^3.1.0"
+darglint = "^1.5.4"
+reorder-python-imports = "^2.3.5"
+pre-commit-hooks = "^3.2.0"
 
 [tool.coverage.paths]
 source = ["src", "*/site-packages"]
diff --git a/src/nox_poetry/__init__.py b/src/nox_poetry/__init__.py
index 59c861a2..27bc4e49 100644
--- a/src/nox_poetry/__init__.py
+++ b/src/nox_poetry/__init__.py
@@ -1,8 +1,6 @@
 """Using Poetry in Nox sessions."""
-import contextlib
-import tempfile
+import hashlib
 from pathlib import Path
-from typing import Iterator
 
 from nox.sessions import Session
 
@@ -15,34 +13,25 @@ class _Poetry:
     """
 
     def __init__(self, session: Session) -> None:
-        """Constructor."""
+        """Initialize."""
         self.session = session
 
-    def install(self, *args: str) -> None:
-        """Install the dependencies."""
-        self.session.run("poetry", "install", *args, external=True)
-
-    @contextlib.contextmanager
-    def export(self, *args: str) -> Iterator[Path]:
+    def export(self, path: Path, *, dev: bool) -> None:
         """Export the lock file to requirements format.
 
         Args:
-            args: Command-line arguments for ``poetry export``.
-
-        Yields:
-            The path to the requirements file.
+            path: The destination path.
+            dev: If True, include development dependencies.
         """
-        with tempfile.TemporaryDirectory() as directory:
-            requirements = Path(directory) / "requirements.txt"
-            self.session.run(
-                "poetry",
-                "export",
-                *args,
-                "--format=requirements.txt",
-                f"--output={requirements}",
-                external=True,
-            )
-            yield requirements
+        options = ["--dev"] if dev else []
+        self.session.run(
+            "poetry",
+            "export",
+            "--format=requirements.txt",
+            f"--output={path}",
+            *options,
+            external=True,
+        )
 
     def build(self, *args: str) -> str:
         """Build the package.
@@ -60,6 +49,31 @@ def build(self, *args: str) -> str:
         return output.split()[-1]
 
 
+def export_requirements(session: Session, *, dev: bool) -> Path:
+    """Export the lock file to requirements format.
+
+    Args:
+        session: The Session object.
+        dev: If True, include development dependencies.
+
+    Returns:
+        The path to the requirements file.
+    """
+    tmpdir = Path(session.create_tmp())
+    name = "dev-requirements.txt" if dev else "requirements.txt"
+    path = tmpdir / name
+    hashfile = tmpdir / f"{name}.hash"
+
+    lockdata = Path("poetry.lock").read_bytes()
+    digest = hashlib.blake2b(lockdata).hexdigest()
+
+    if not hashfile.is_file() or hashfile.read_text() != digest:
+        _Poetry(session).export(path, dev=dev)
+        hashfile.write_text(digest)
+
+    return path
+
+
 def install_package(session: Session) -> None:
     """Build and install the package.
 
@@ -73,10 +87,10 @@ def install_package(session: Session) -> None:
         session: The Session object.
     """
     poetry = _Poetry(session)
-
-    poetry.install("--no-root")
     wheel = poetry.build("--format=wheel")
+    requirements = export_requirements(session, dev=False)
 
+    session.install(f"--requirement={requirements}")
     session.install("--no-deps", "--force-reinstall", f"dist/{wheel}")
 
 
@@ -91,6 +105,5 @@ def install(session: Session, *args: str) -> None:
         session: The Session object.
         args: Command-line arguments for ``pip install``.
     """
-    poetry = _Poetry(session)
-    with poetry.export("--dev") as requirements:
-        session.install(f"--constraint={requirements}", *args)
+    requirements = export_requirements(session, dev=True)
+    session.install(f"--constraint={requirements}", *args)
diff --git a/tests/test_nox_poetry.py b/tests/test_nox_poetry.py
index eb647458..d9fb28f0 100644
--- a/tests/test_nox_poetry.py
+++ b/tests/test_nox_poetry.py
@@ -19,6 +19,10 @@ def install(self, *args: str, **kargs: Any) -> None:
         """Install."""
         pass
 
+    def create_tmp(self, *args: str, **kargs: Any) -> None:
+        """Create temporary directory."""
+        pass
+
 
 def test_install() -> None:
     """It installs."""

From 9b6c11a2c670dafbafed0d9fe5746787e5ab56a8 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Fri, 25 Sep 2020 16:50:55 +0200
Subject: [PATCH 13/17] Update tests

---
 tests/test_nox_poetry.py | 34 ++++++++++++++++++++++++++--------
 1 file changed, 26 insertions(+), 8 deletions(-)

diff --git a/tests/test_nox_poetry.py b/tests/test_nox_poetry.py
index d9fb28f0..404c8338 100644
--- a/tests/test_nox_poetry.py
+++ b/tests/test_nox_poetry.py
@@ -1,9 +1,12 @@
 """Tests."""
+from pathlib import Path
 from typing import Any
 from typing import cast
 
+import pytest
 from nox.sessions import Session
 
+from nox_poetry import export_requirements
 from nox_poetry import install
 from nox_poetry import install_package
 
@@ -11,6 +14,10 @@
 class FakeSession:
     """Fake session."""
 
+    def __init__(self, tmpdir: Path) -> None:
+        """Initialize."""
+        self.tmpdir = tmpdir
+
     def run(self, *args: str, **kargs: Any) -> str:
         """Run."""
         return "example.whl"
@@ -19,18 +26,29 @@ def install(self, *args: str, **kargs: Any) -> None:
         """Install."""
         pass
 
-    def create_tmp(self, *args: str, **kargs: Any) -> None:
+    def create_tmp(self, *args: str, **kargs: Any) -> str:
         """Create temporary directory."""
-        pass
+        return str(self.tmpdir)
+
 
+@pytest.fixture
+def session(tmp_path: Path) -> Session:
+    """Return a fake Nox session."""
+    session = FakeSession(tmp_path)
+    return cast(Session, session)
 
-def test_install() -> None:
-    """It installs."""
-    session = cast(Session, FakeSession())
+
+def test_install(session: Session) -> None:
+    """It installs the dependencies."""
     install(session, "pip")
 
 
-def test_install_package() -> None:
-    """It installs."""
-    session = cast(Session, FakeSession())
+def test_install_package(session: Session) -> None:
+    """It installs the package."""
     install_package(session)
+
+
+def test_export_requirements(session: Session) -> None:
+    """It exports the requirements."""
+    export_requirements(session, dev=True).touch()
+    export_requirements(session, dev=True)

From 53b7baeeab72bc8e9b57941098801ff526bf14ad Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Fri, 25 Sep 2020 17:53:31 +0200
Subject: [PATCH 14/17] Use package instead of __init__ in API reference

---
 docs/reference.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/reference.rst b/docs/reference.rst
index 794571b7..a4078e5b 100644
--- a/docs/reference.rst
+++ b/docs/reference.rst
@@ -6,8 +6,8 @@ Reference
     :backlinks: none
 
 
-nox_poetry.__init__
--------------------
+nox_poetry
+----------
 
-.. automodule:: nox_poetry.__init__
+.. automodule:: nox_poetry
    :members:

From c89f6f4683df0f51abcfd0f485a3bc49683b419c Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Fri, 25 Sep 2020 17:54:01 +0200
Subject: [PATCH 15/17] Do not run typeguard by default

---
 noxfile.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/noxfile.py b/noxfile.py
index a43acebc..9d996de3 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -19,7 +19,6 @@
     "safety",
     "mypy",
     "tests",
-    "typeguard",
     "docs-build",
 )
 

From 6812ace89970304941ce45324e56a705c5f8bc31 Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Fri, 25 Sep 2020 17:56:53 +0200
Subject: [PATCH 16/17] Do not run typeguard in CI

---
 .github/workflows/tests.yml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3c83994d..4f9448be 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -22,7 +22,6 @@ jobs:
           - { python-version: 3.6, os: ubuntu-latest, session: "tests" }
           - { python-version: 3.8, os: windows-latest, session: "tests" }
           - { python-version: 3.8, os: macos-latest, session: "tests" }
-          - { python-version: 3.8, os: ubuntu-latest, session: "typeguard" }
           - { python-version: 3.8, os: ubuntu-latest, session: "docs-build" }
 
     env:

From 1db2324180bcfc9562b332f44ba94d7c9c5ba73c Mon Sep 17 00:00:00 2001
From: Claudio Jolowicz <claudio.jolowicz@cyren.com>
Date: Fri, 25 Sep 2020 18:43:43 +0200
Subject: [PATCH 17/17] Update README.rst

---
 README.rst | 139 +++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 124 insertions(+), 15 deletions(-)

diff --git a/README.rst b/README.rst
index ca864783..6196c9ef 100644
--- a/README.rst
+++ b/README.rst
@@ -33,32 +33,135 @@ nox-poetry
    :alt: Black
 
 
-Features
---------
+Helper functions for using Poetry_ inside Nox_ sessions
 
-* TODO
 
-
-Requirements
+Installation
 ------------
 
-* TODO
+You can install ``nox-poetry`` via pip_ from the Python Package Index:
 
+.. code:: console
+
+   $ pip install nox-poetry
 
-Installation
-------------
 
-You can install *nox-poetry* via pip_ from PyPI_:
+**Important:**
+This package must be installed into the same environment that Nox is run from.
+If you installed Nox using pipx_,
+use the following command to install this package into the same environment:
 
 .. code:: console
 
-   $ pip install nox-poetry
+   $ pipx inject nox nox-poetry
 
 
 Usage
 -----
 
-* TODO
+- Use ``nox_poetry.install_package(session)`` to install your own package.
+- Use ``nox_poetry.install(session, *args)`` to install third-party packages.
+- Packages installed like this must be declared as development dependencies using Poetry.
+
+For example, the following Nox session runs your test suite:
+
+.. code:: python
+
+   # noxfile.py
+   import nox
+   from nox.sessions import Session
+   from nox_poetry import install, install_package
+
+   @nox.session
+   def tests(session: Session) -> None:
+       """Run the test suite."""
+       install_package(session)
+       install(session, "pytest")
+       session.run("pytest", *session.posargs)
+
+
+Why?
+----
+
+Compare the session above to one written without this package:
+
+.. code:: python
+
+   @nox.session
+   def tests(session: Session) -> None:
+       """Run the test suite."""
+       session.install(".")
+       session.install("pytest")
+       session.run("pytest", *session.posargs)
+
+This session has several problems:
+
+- Poetry is installed as a build backend every time.
+- Package dependencies are only constrained by the wheel metadata, not by the lock file (*pinned*).
+- The ``pytest`` dependency is not constrained at all.
+
+You can solve these issues by declaring ``pytest`` as a development dependency,
+and installing your package and its dependencies using ``poetry install``:
+
+.. code:: python
+
+   @nox.session
+   def tests(session: Session) -> None:
+       """Run the test suite."""
+       session.run("poetry", "install", external=True)
+       session.run("pytest", *session.posargs)
+
+Unfortunately, this approach creates problems of its own:
+
+- Checks run against an editable installation of your package,
+  i.e. your local copy of the code, instead of the installed wheel your users see.
+- The package is installed, as well as all of its core and development dependencies.
+  This is wasteful when you only need to run ``black`` or ``flake8``.
+  It also goes against the idea of running checks in isolated environments.
+- Poetry may decide to install packages into its own virtual environment instead of the one provided by Nox.
+
+``nox-poetry`` uses a third approach.
+Third-party packages are installed by exporting the lock file in ``requirements.txt`` format,
+and passing it as a `constraints file`_ to pip.
+When installing your own package, Poetry is used to build a wheel, which is then installed by pip.
+This approach has some advantages:
+
+- You can declare tools like ``pytest`` as development dependencies in Poetry.
+- Dependencies are pinned by Poetry's lock file, making checks predictable and deterministic.
+- You can run checks against an installed wheel, instead of your local copy of the code.
+- Every tool can run in an isolated environment with minimal dependencies.
+- No need to install your package with all its dependencies if all you need is some linter.
+
+For more details, take a look at `this article`__.
+
+__ https://cjolowicz.github.io/posts/hypermodern-python-03-linting/#managing-dependencies-in-nox-sessions-with-poetry
+
+
+API
+---
+
+``nox_poetry.install(session, *args)``:
+   Install development dependencies into a Nox session using Poetry.
+
+   The ``nox_poetry.install`` function
+   installs development dependencies into a Nox session,
+   using the versions specified in Poetry's lock file.
+   The function arguments are the same as those for `nox.sessions.Session.install`_:
+   The first argument is the ``Session`` object,
+   and the remaining arguments are command-line arguments for `pip install`_,
+   typically just the package or packages to be installed.
+
+``nox_poetry.install_package(session)``:
+   Install the package into a Nox session using Poetry.
+
+   The ``nox_poetry.install_package`` function
+   installs your package into a Nox session,
+   including the core dependencies as specified in Poetry's lock file.
+   This is done by building a wheel from the package,
+   and installing it using pip_.
+   Dependencies are installed in the same way as in the ``nox_poetry.install`` function,
+   i.e. using a constraints file.
+   Its only argument is the ``Session`` object from Nox.
 
 
 Contributing
@@ -71,8 +174,8 @@ To learn more, see the `Contributor Guide`_.
 License
 -------
 
-Distributed under the terms of the MIT_ license,
-*nox-poetry* is free and open source software.
+``nox-poetry`` is free and open source software,
+distributed under the terms of the MIT_ license.
 
 
 Issues
@@ -90,10 +193,16 @@ This project was generated from `@cjolowicz`_'s `Hypermodern Python Cookiecutter
 
 .. _@cjolowicz: https://github.com/cjolowicz
 .. _Cookiecutter: https://github.com/audreyr/cookiecutter
-.. _MIT: http://opensource.org/licenses/MIT
-.. _PyPI: https://pypi.org/
 .. _Hypermodern Python Cookiecutter: https://github.com/cjolowicz/cookiecutter-hypermodern-python
+.. _MIT: http://opensource.org/licenses/MIT
+.. _Nox: https://nox.thea.codes/
+.. _Poetry: https://python-poetry.org/
+.. _constraints file: https://pip.pypa.io/en/stable/user_guide/#constraints-files
 .. _file an issue: https://github.com/cjolowicz/nox-poetry/issues
+.. _nox.sessions.Session.install: https://nox.thea.codes/en/stable/config.html#nox.sessions.Session.install
+.. _nox.sessions.Session.run: https://nox.thea.codes/en/stable/config.html#nox.sessions.Session.run
+.. _pip install: https://pip.pypa.io/en/stable/reference/pip_install/
 .. _pip: https://pip.pypa.io/
+.. _pipx: https://pipxproject.github.io/pipx/
 .. github-only
 .. _Contributor Guide: CONTRIBUTING.rst