Merge pull request #16 from enpaul/enp/fix

Fix support for extras installation

.github/workflows/ci.yaml

@@ -0,0 +1,41 @@
+---
+name: CI
+on:
+  pull_request:
+    types: ["opened", "synchronize"]
+  push:
+    branches: ["devel"]
+jobs:
+  Test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python:
+          - version: 3.6
+            toxenv: py36
+          - version: 3.7
+            toxenv: py37
+          - version: 3.8
+            toxenv: py38
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python.version }}
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{ matrix.python.version }}
+      - name: Install tox
+        run: pip install "tox>=3.20.0,<3.21.0" --upgrade
+      - name: Run tests via ${{ matrix.python.toxenv }}
+        run: tox -e ${{ matrix.python.toxenv }}
+  Check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.8
+      - name: Install tox requirements
+        run: pip install "tox>=3.20.0,<3.21.0" --upgrade
+      - name: Run meta checks
+        run: tox -e static -e static-tests -e security

.pre-commit-config.yaml

@@ -4,14 +4,14 @@ repos:
     rev: 20.8b1
     hooks:
       - id: black
-        language_version: python3.7
+        language_version: python3
 
   - repo: https://github.com/asottile/blacken-docs
     rev: v0.5.0
     hooks:
       - id: blacken-docs
         additional_dependencies: [black==20.8b1]
-        language_version: python3.7
+        language_version: python3
 
   - repo: https://github.com/asottile/reorder_python_imports
     rev: v2.3.5

README.md

@@ -1,19 +1,21 @@
 # tox-poetry-installer
 
 A plugin for [Tox](https://tox.readthedocs.io/en/latest/) that allows test environment
-dependencies to be installed using [Poetry](https://python-poetry.org/) using its lockfile.
+dependencies to be installed using [Poetry](https://python-poetry.org/) from its lockfile.
 
-⚠️ **This project is alpha software and should not be used in a production capacity** ⚠️
+⚠️ **This project is alpha software and should not be used in production environments** ⚠️
 
-![image](https://img.shields.io/pypi/l/tox-poetry-installer)
-![image](https://img.shields.io/pypi/v/tox-poetry-installer)
-![image](https://img.shields.io/pypi/pyversions/tox-poetry-installer)
+[![ci-status](https://github.com/enpaul/tox-poetry-installer/workflows/CI/badge.svg?event=push)](https://github.com/enpaul/tox-poetry-installer/actions)
+[![license](https://img.shields.io/pypi/l/tox-poetry-installer)](https://opensource.org/licenses/MIT)
+[![pypi-version](https://img.shields.io/pypi/v/tox-poetry-installer)](https://pypi.org/project/tox-poetry-installer/)
+[![python-versions](https://img.shields.io/pypi/pyversions/tox-poetry-installer)](https://www.python.org)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
 **Documentation**
 
 * [Installation](#installation)
 * [Quick Start](#quick-start)
-* [Usage](#usage)
+* [Usage Examples](#usage-examples)
 * [Known Drawbacks and Problems](#known-drawbacks-and-problems)
 * [Why would I use this?](#why-would-i-use-this) (What problems does this solve?)
 * [Developing](#developing)
@@ -25,12 +27,14 @@ dependencies to be installed using [Poetry](https://python-poetry.org/) using it
 Related resources:
 * [Poetry Python Project Manager](https://python-poetry.org/)
 * [Tox Automation Project](https://tox.readthedocs.io/en/latest/)
-* [Tox plugins](https://tox.readthedocs.io/en/latest/plugins.html)
+* [Poetry Dev-Dependencies Tox Plugin](https://github.com/sinoroc/tox-poetry-dev-dependencies)
+* [Poetry Tox Plugin](https://github.com/tkukushkin/tox-poetry)
+* [Other Tox plugins](https://tox.readthedocs.io/en/latest/plugins.html)
 
 
 ## Installation
 
-Add the plugin as a development dependency a project using Poetry:
+Add the plugin as a development dependency of a Poetry project:
 
 ```
 ~ $: poetry add tox-poetry-installer --dev
@@ -42,11 +46,10 @@ Confirm that the plugin is installed, and Tox recognizes it, by checking the Tox
 ~ $: poetry run tox --version
 3.20.0 imported from .venv/lib64/python3.8/site-packages/tox/__init__.py
 registered plugins:
-    tox-poetry-installer-0.2.0 at .venv/lib64/python3.8/site-packages/tox_poetry_installer.py
+    tox-poetry-installer-0.2.2 at .venv/lib64/python3.8/site-packages/tox_poetry_installer.py
 ```
 
-If using in a CI/automation environment using Pip, ensure that the plugin is installed to the
-same environment as Tox:
+If using Pip, ensure that the plugin is installed to the same environment as Tox:
 
 ```
 # Calling the virtualenv's 'pip' binary directly will cause pip to install to that virtualenv
@@ -76,8 +79,8 @@ commands = ...
 ```
 
 To require specific dependencies be installed from the Poetry lockfile, and let the rest be
-installed using the default Tox installation method, add the suffix `@poetry` to the dependencies.
-In the example below the `pytest`, `pytest-cov`, and `black` dependencies will be installed using
+installed using the default Tox installation backend, add the suffix `@poetry` to the dependencies.
+In the example below the `pytest`, `pytest-cov`, and `black` dependencies will be installed from
 the lockfile while `pylint` and `mypy` will be installed using the versions specified here:
 
 ```ini
@@ -97,9 +100,9 @@ commands = ...
 one Tox is testing) will always be installed from the lockfile.
 
 
-## Usage
+## Usage Examples
 
-After installing the plugin to a project, your Tox automation is already benefiting from the
+After installing the plugin to a project your Tox automation is already benefiting from the
 lockfile: when Tox installs your project package to one of your environments, all the dependencies
 of your project package will be installed using the versions specified in the lockfile. This
 happens automatically and requires no configuration changes.
@@ -107,7 +110,7 @@ happens automatically and requires no configuration changes.
 But what about the rest of your Tox environment dependencies?
 
 Let's use an example `tox.ini` file, below, that defines two environments: the main `testenv` for
-running the project tests and `testenv:check` for running some other helpful checks:
+running the project tests and `testenv:check` for running some other helpful tools:
 
 ```ini
 [tox]
@@ -151,9 +154,9 @@ Running Tox using this config gives us this error:
 tox_poetry_installer.LockedDepVersionConflictError: Locked dependency 'pylint >=2.4.4,<2.6.0' cannot include version specifier
 ```
 
-This is because we told the Tox environment to require all dependencies to be locked, but then also
+This is because we told the Tox environment to require all dependencies be locked, but then also
 specified a specific version constraint for Pylint. With the `require_locked_deps = true` setting
-Tox expects all dependencies to take their version from the lockfile, so when it got conflicting
+Tox expects all dependencies to take their version from the lockfile, so when it gets conflicting
 information it errors. We can fix this by simply removing all version specifiers from the
 environment dependency list:
 
@@ -174,9 +177,9 @@ recreated.
 
 Now let's look at the `testenv` environment. Let's make the same changes to the `testenv`
 environment that we made to `testenv:check` above; remove the PyTest version and add
-`require_locked_deps = true`. Then imagine that we want to add a new (made up) tool the test
-environment called `crash_override` to the environment: we can add `crash-override` as a dependency
-of the test environment, but this will cause an error:
+`require_locked_deps = true`. Then imagine that we want to add the
+[Requests](https://requests.readthedocs.io/en/master/) library to the test environment: we
+can add `requests` as a dependency of the test environment, but this will cause an error:
 
 ```ini
 [testenv]
@@ -184,30 +187,29 @@ description = Run the tests
 require_locked_deps = true
 deps =
     pytest
-    crash-override
+    requests
 commands = ...
 ```
 
 Running Tox with this config gives us this error:
 
 ```
-tox_poetry_installer.LockedDepNotFoundError: No version of locked dependency 'crash-override' found in the project lockfile
+tox_poetry_installer.LockedDepNotFoundError: No version of locked dependency 'requests' found in the project lockfile
 ```
 
-This is because `crash-override` is not in our lockfile. Tox will refuse to install a dependency
+This is because `requests` is not in our lockfile yet. Tox will refuse to install a dependency
 that isn't in the lockfile to an an environment that specifies `require_locked_deps = true`. We
-could fix this (if `crash-override` was a real package) by running
-`poetry add crash-override --dev` to add it to the lockfile.
+can fix this by running `poetry add requests --dev` to add it to the lockfile.
 
-Now let's combine dependencies from the lockfile ("locked dependencies") with dependencies that are
-specified inline in the environment configuration ("unlocked dependencies").
-[This isn't generally recommended of course](#why-would-i-use-this), but it's a valid use case and
-fully supported by this plugin. Let's modify the `testenv` configuration to install PyTest from the
-lockfile but then install an older version of the
-[Requests](https://requests.readthedocs.io/en/master/) library.
+Now let's combine dependencies from the lockfile with dependencies that are
+specified in-line in the Tox environment configuration.
+[This isn't generally recommended](#why-would-i-use-this), but it is a valid use case and
+fully supported by this plugin. Let's modify the `testenv` configuration to install PyTest
+from the lockfile but then install an older version of the Requests library.
 
 The first thing to do is remove the `require_locked_deps = true` setting so that we can install
-Requests as an unlocked dependency. Then we can add our version of requests to the dependency list:
+Requests as an unlocked dependency. Then we can add our version specifier to the `requests`
+entry in the dependency list:
 
 ```ini
 [testenv]
@@ -219,7 +221,8 @@ commands = ...
 ```
 
 However we still want `pytest` to be installed from the lockfile, so the final step is to tell Tox
-to install it from the lockfile by adding the suffix `@poetry` to it:
+to install it from the lockfile by adding the suffix `@poetry` to the `pytest` entry in the
+dependency list:
 
 ```ini
 [testenv]
@@ -232,7 +235,7 @@ commands = ...
 
 Now when the `testenv` environment is created it will install PyTest (and all of its dependencies)
 from the lockfile while it will install Requests (and all of its dependencies) using the default
-Tox installation backend using Pip.
+Tox installation backend.
 
 
 ## Known Drawbacks and Problems
@@ -246,12 +249,11 @@ Tox installation backend using Pip.
   * [`indexserver`](https://tox.readthedocs.io/en/latest/config.html#conf-indexserver)
   * [`usedevelop`](https://tox.readthedocs.io/en/latest/config.html#conf-indexserver)
 
-* The [`extras`](https://tox.readthedocs.io/en/latest/config.html#conf-extras) setting in `tox.ini`
-  does not work. Optional dependencies of the project package will not be installed to Tox
-  environments. (See the [road map](#roadmap))
-
-* The plugin currently depends on `poetry<1.1.0`. This can be a different version than Poetry being
-  used for actual project development. (See the [road map](#roadmap))
+* Tox environments automatically inherit their settings from the main `testenv` environment. This
+  means that if the `require_locked_deps = true` is specified for the `testenv` environment then
+  all environments will also require locked dependencies. This can be overwritten by explicitly
+  specifying `require_locked_deps = false` on child environments where unlocked dependencies are
+  needed.
 
 * There are a handful of packages that cannot be installed from the lockfile, whether as specific
   dependencies or as transient dependencies (dependencies of dependencies). This is due to
@@ -265,20 +267,20 @@ Tox installation backend using Pip.
 
 **Introduction**
 
-The lockfile is a file generated by a package manager for a project that lists what
-dependencies are installed, the versions of those dependencies, and additional metadata that
-the package manager can use to recreate the local project environment. This allows developers
+The lockfile is a file generated by a package manager for a project that records what
+dependencies are installed, the versions of those dependencies, and any additional metadata that
+the package manager needs to recreate the local project environment. This allows developers
 to have confidence that a bug they are encountering that may be caused by one of their
 dependencies will be reproducible on another device. In addition, installing a project
 environment from a lockfile gives confidence that automated systems running tests or performing
-builds are using the same environment that a developer is.
+builds are using the same environment as a developer.
 
 [Poetry](https://python-poetry.org/) is a project dependency manager for Python projects, and
-as such it creates and manages a lockfile so that its users can benefit from all the features
+so it creates and manages a lockfile so that its users can benefit from all the features
 described above. [Tox](https://tox.readthedocs.io/en/latest/#what-is-tox) is an automation tool
 that allows Python developers to run tests suites, perform builds, and automate tasks within
-self contained [Python virtual environments](https://docs.python.org/3/tutorial/venv.html).
-To make these environments useful, Tox supports installing per-environment dependencies.
+self-contained [Python virtual environments](https://docs.python.org/3/tutorial/venv.html).
+To make these environments useful Tox supports installing dependencies in each environment.
 However, since these environments are created on the fly and Tox does not maintain a lockfile,
 there can be subtle differences between the dependencies a developer is using and the
 dependencies Tox uses.
@@ -286,19 +288,17 @@ dependencies Tox uses.
 This is where this plugin comes into play.
 
 By default Tox uses [Pip](https://docs.python.org/3/tutorial/venv.html) to install the
-PEP-508 compliant dependencies to a test environment. A more robust way to do this is to
-install dependencies directly from the lockfile so that the version installed to the Tox
-environment always matches the version Poetry specifies. This plugin overwrites the default
-Tox dependency installation behavior and replaces it with a Poetry-based installation using
-the dependency metadata from the lockfile.
+PEP-508 compliant dependencies to a test environment. This plugin extends the default
+Tox dependency installation behavior to support installing dependencies using a Poetry-based
+installation method that makes use of the dependency metadata from Poetry's lockfile.
 
 **The Problem**
 
-Environment dependencies for a Tox environment are usually done in PEP-508 format like the
-below example
+Environment dependencies for a Tox environment are usually specified in PEP-508 format, like
+the below example:
 
 ```ini
-# tox.ini
+# from tox.ini
 ...
 
 [testenv]
@@ -311,31 +311,35 @@ deps =
 ...
 ```
 
-Perhaps these dependencies are also useful during development, so they can be added to the
+Let's assume these dependencies are also useful during development, so they can be added to the
 Poetry environment using this command:
 
  ```
- poetry add foo==1.2.3 bar>=1.3,<2.0 baz --dev
+ poetry add --dev \
+    foo==1.2.3 \
+    bar>=1.3,<2.0 \
+    baz
  ```
 
- However there are three potential problems that could arise from each of these environment
+ However there is a potential problem that could arise from each of these environment
  dependencies that would _only_ appear in the Tox environment and not in the Poetry
- environment:
+ environment in use by a developer:
 
  * **The `foo` dependency is pinned to a specific version:** let's imagine a security
    vulnerability is discovered in `foo` and the maintainers release version `1.2.4` to fix
-   it. A developer can run `poetry remove foo && poetry add foo^1.2` to get the new version,
-   but the Tox environment is left unchanged. The developer environment specified by the
-   lockfile is now patched against the vulnerability, but the Tox environment is not.
+   it. A developer can run `poetry remove foo` and then `poetry add foo^1.2` to get the new
+   version, but the Tox environment is left unchanged. The development environment, as defined by
+   the lockfile, is now patched against the vulnerability but the Tox environment is not.
 
 * **The `bar` dependency specifies a dynamic range:** a dynamic range allows a range of
   versions to be installed, but the lockfile will have an exact version specified so that
   the Poetry environment is reproducible; this allows versions to be updated with
-  `poetry update` rather than with the `remove` and `add` used above. If the maintainers of
-  `bar` release version `1.6.0` then the Tox environment will install it because it is valid
-  for the specified version range, meanwhile the Poetry environment will continue to install
-  the version from the lockfile until `poetry update bar` explicitly updates it. The
-  development environment is now has a different version of `bar` than the Tox environment.
+  `poetry update` rather than with the `remove` and `add` commands used above. If the
+  maintainers of `bar` release version `1.6.0` then the Tox environment will install it
+  because it is valid for the specified version range. Meanwhile the Poetry environment will
+  continue to install the version from the lockfile until `poetry update bar` explicitly
+  updates it. The development environment is now has a different version of `bar` than the Tox
+  environment.
 
 * **The `baz` dependency is unpinned:** unpinned dependencies are
   [generally a bad idea](https://python-poetry.org/docs/faq/#why-are-unbound-version-constraints-a-bad-idea),
@@ -344,27 +348,26 @@ Poetry environment using this command:
   but Pip (via Tox) will interpret it as a wildcard. If the latest version of `baz` is `1.0.0`
   then `poetry add baz` will result in a constraint of `baz>=1.0.0,<2.0.0` while the Tox
   environment will have a constraint of `baz==*`. The Tox environment can now install an
-  incompatible version of `baz` that cannot be easily caught using `poetry update`.
+  incompatible version of `baz` and any errors that causes cannot be replicated using `poetry update`.
 
 All of these problems can apply not only to the dependencies specified for a Tox environment,
-but also to the dependencies of those dependencies, and so on.
+but also to the dependencies of those dependencies, those dependencies' dependencies, and so on.
 
 **The Solution**
 
-This plugin requires that all dependencies specified for all Tox environments be unbound
-with no version constraint specified at all. This seems counter-intuitive given the problems
-outlined above, but what it allows the plugin to do is offload all version management to
-Poetry.
-
-On initial inspection, the environment below appears less stable than the one presented above
-because it does not specify any versions for its dependencies:
+This plugin allows dependencies specified in Tox environment take their version directly from
+the Poetry lockfile without needing an independent version to be specified in the Tox
+environment configuration. The modified version of the example environment given below appears
+less stable than the one presented above because it does not specify any versions for its
+dependencies:
 
 ```ini
-# tox.ini
+# from tox.ini
 ...
 
 [testenv]
 description = Some very cool tests
+require_locked_deps = true
 deps =
     foo
     bar
@@ -373,19 +376,17 @@ deps =
 ...
 ```
 
-However with the `tox-poetry-installer` plugin installed this instructs Tox to install these
-dependencies using the Poetry lockfile so that the version installed to the Tox environment
-exactly matches the version Poetry is managing. When `poetry update` updates the lockfile
-with new dependency versions, Tox will automatically install these new versions without needing
-any changes to the configuration.
-
-All dependencies are specified in one place (the lockfile) and dependency version management is
-handled by a tool dedicated to that task (Poetry).
+However with the `tox-poetry-installer` plugin installed the `require_locked_deps = true`
+setting means that Tox will install these dependencies from the Poetry lockfile so that the
+version installed to the Tox environment exactly matches the version Poetry is managing. When
+`poetry update` updates the lockfile with new versions of these dependencies, Tox will
+automatically install these new versions without needing any changes to the configuration.
 
 
 ## Developing
 
-This project requires Poetry-1.0+, see the [installation instructions here](https://python-poetry.org/docs/#installation).
+This project requires a developer to have Poetry version 1.0+ installed on their workstation, see
+the [installation instructions here](https://python-poetry.org/docs/#installation).
 
 ```bash
 # Clone the repository...
@@ -428,7 +429,7 @@ releases on PyPI.
 ## Roadmap
 
 This project is under active development and is classified as alpha software, not yet ready
-usage in production systems.
+for usage in production environments.
 
 * Beta classification will be assigned when the initial feature set is finalized
 * Stable classification will be assigned when the test suite covers an acceptable number of
@@ -438,20 +439,21 @@ usage in production systems.
 
 - [X] Verify that primary package dependencies (from the `.package` env) are installed
       correctly using the Poetry backend.
-- [ ] Support the [`extras`](https://tox.readthedocs.io/en/latest/config.html#conf-extras)
-      Tox configuration option
+- [X] Support the [`extras`](https://tox.readthedocs.io/en/latest/config.html#conf-extras)
+      Tox configuration option ([#4](https://github.com/enpaul/tox-poetry-installer/issues/4))
 - [X] Add per-environment Tox configuration option to fall back to default installation
       backend.
-- [ ] Add detection of a changed lockfile to automatically trigger a rebuild of Tox
-      environments when necessary.
 - [ ] Add warnings when an unsupported Tox configuration option is detected while using the
-      Poetry backend.
+      Poetry backend. ([#5](https://github.com/enpaul/tox-poetry-installer/issues/5))
 - [X] Add trivial tests to ensure the project metadata is consistent between the pyproject.toml
       and the module constants.
-- [ ] Update to use [poetry-core](https://github.com/python-poetry/poetry-core)
-      Tox configuration option) and improve robustness of the Tox and Poetry module imports
-      to avoid potentially breaking API changes in upstream packages.
-- [ ] Find and implement a way to mitigate the [Poetry UNSAFE_DEPENDENCIES bug](https://github.com/python-poetry/poetry/issues/1584).
+- [X] Update to use [poetry-core](https://github.com/python-poetry/poetry-core) and
+      improve robustness of the Tox and Poetry module imports
+      to avoid potentially breaking API changes in upstream packages. ([#2](https://github.com/enpaul/tox-poetry-installer/issues/2))
+- [ ] Find and implement a way to mitigate the [UNSAFE_DEPENDENCIES issue](https://github.com/python-poetry/poetry/issues/1584) in Poetry.
+      ([#6](https://github.com/enpaul/tox-poetry-installer/issues/6))
+- [ ] Fix logging to make proper use of Tox's logging reporter infrastructure ([#3](https://github.com/enpaul/tox-poetry-installer/issues/3))
+- [ ] Add configuration option for installing all dev-dependencies to a testenv ([#14](https://github.com/enpaul/tox-poetry-installer/issues/14))
 
 ### Path to Stable
 
@@ -459,6 +461,6 @@ Everything in Beta plus...
 
 - [ ] Add tests for each feature version of Tox between 2.3 and 3.20
 - [ ] Add tests for Python-3.6, 3.7, and 3.8
-- [ ] Add Github Actions based CI
+- [X] Add Github Actions based CI
 - [ ] Add CI for CPython, PyPy, and Conda
 - [ ] Add CI for Linux and Windows

pyproject.toml

@@ -1,11 +1,14 @@
 [tool.poetry]
 name = "tox-poetry-installer"
-version = "0.2.1"
+version = "0.3.1"
 license = "MIT"
 authors = ["Ethan Paul <24588726+enpaul@users.noreply.github.com>"]
 description = "Tox plugin to install Tox environment dependencies using the Poetry backend and lockfile"
 repository = "https://github.com/enpaul/tox-poetry-installer/"
-packages = [{include = "tox_poetry_installer.py"}]
+packages = [
+  {include = "tox_poetry_installer.py"},
+  {include = "tests/*.py", format = "sdist"}
+]
 keywords = ["tox", "poetry", "plugin"]
 readme = "README.md"
 classifiers = [
@@ -27,7 +30,8 @@ poetry_installer = "tox_poetry_installer"
 
 [tool.poetry.dependencies]
 python = "^3.6"
-poetry = ">=1.0.0, <1.1.0"
+poetry = "^1.0.0"
+poetry-core = "^1.0.0"
 tox = "^2.3.0 || ^3.0.0"
 
 [tool.poetry.dev-dependencies]

tox.ini

@@ -45,8 +45,8 @@ allowlist_externals =
 commands =
     black {toxinidir}/tests/
     bash -c "reorder-python-imports {toxinidir}/tests/*.py --unclassifiable-application-module tox_poetry_installer"
-    pylint --rcfile {toxinidir}/.pylintrc {toxinidir}/tests/
-    mypy --ignore-missing-imports --no-strict-optional {toxinidir}/tests/
+    bash -c "pylint --rcfile {toxinidir}/.pylintrc {toxinidir}/tests/*.py"
+    bash -c "mypy --ignore-missing-imports --no-strict-optional {toxinidir}/tests/*.py"
 
 [testenv:security]
 description = Security checks

tox_poetry_installer.py

@@ -1,9 +1,24 @@
 """Tox plugin for installing environments using Poetry
 
-This plugin makes use of the ``tox_testenv_install_deps`` Tox plugin hook to replace the default
+This plugin makes use of the ``tox_testenv_install_deps`` Tox plugin hook to augment the default
 installation functionality to install dependencies from the Poetry lockfile for the project. It
 does this by using ``poetry`` to read in the lockfile, identify necessary dependencies, and then
 use Poetry's ``PipInstaller`` class to install those packages into the Tox environment.
+
+Quick definition of terminology:
+
+* "project package" - the package that Tox is testing, usually the one the current project is
+  is developing; definitionally, this is the package that is built by Tox in the ``.package`` env.
+* "project package dependency" or "project dependency" - a dependency required by the project
+  package for installation; i.e. a package that would be installed when running
+  ``pip install <project package>``.
+* "environment dependency" - a dependency specified for a given testenv in the Tox configuration.
+* "locked dependency" - a package that is present in the Poetry lockfile and will be installed
+  according to the metadata in the lockfile.
+* "unlocked dependency" - a package that is either not present in the Poetry lockfile or is not
+  specified to be installed according to the metadata in the lockfile.
+* "transiety dependency" - a package not explicitly specified for installation, but required by a
+  package that is explicitly specified.
 """
 from pathlib import Path
 from typing import Dict
@@ -13,11 +28,11 @@ from typing import Sequence
 from typing import Set
 from typing import Tuple
 
+from poetry.core.packages import Package as PoetryPackage
 from poetry.factory import Factory as PoetryFactory
-from poetry.factory import Poetry
 from poetry.installation.pip_installer import PipInstaller as PoetryPipInstaller
 from poetry.io.null_io import NullIO as PoetryNullIO
-from poetry.packages import Package as PoetryPackage
+from poetry.poetry import Poetry
 from poetry.puzzle.provider import Provider as PoetryProvider
 from poetry.utils.env import VirtualEnv as PoetryVirtualEnv
 from tox import hookimpl
@@ -30,7 +45,7 @@ from tox.venv import VirtualEnv as ToxVirtualEnv
 
 __title__ = "tox-poetry-installer"
 __summary__ = "Tox plugin to install Tox environment dependencies using the Poetry backend and lockfile"
-__version__ = "0.2.1"
+__version__ = "0.3.1"
 __url__ = "https://github.com/enpaul/tox-poetry-installer/"
 __license__ = "MIT"
 __authors__ = ["Ethan Paul <24588726+enpaul@users.noreply.github.com>"]
@@ -52,6 +67,10 @@ _REPORTER_PREFIX = f"[{__title__}]:"
 _MAGIC_SUFFIX_MARKER = "@poetry"
 
 
+# Map of package names to the package object
+PackageMap = Dict[str, PoetryPackage]
+
+
 class _SortedEnvDeps(NamedTuple):
     unlocked_deps: List[ToxDepConfig]
     locked_deps: List[ToxDepConfig]
@@ -69,6 +88,10 @@ class LockedDepNotFoundError(ToxPoetryInstallerException):
     """Locked dependency was not found in the lockfile"""
 
 
+class ExtraNotFoundError(ToxPoetryInstallerException):
+    """Project package extra not defined in project's pyproject.toml"""
+
+
 def _sort_env_deps(venv: ToxVirtualEnv) -> _SortedEnvDeps:
     """Sorts the environment dependencies by lock status
 
@@ -111,10 +134,10 @@ def _sort_env_deps(venv: ToxVirtualEnv) -> _SortedEnvDeps:
                 unlocked_deps.append(dep)
 
     reporter.verbosity1(
-        f"{_REPORTER_PREFIX} identified {len(locked_deps)} locked env dependencies for installation from poetry lockfile: {[item.name for item in locked_deps]}"
+        f"{_REPORTER_PREFIX} identified {len(locked_deps)} locked env dependencies: {[item.name for item in locked_deps]}"
     )
     reporter.verbosity1(
-        f"{_REPORTER_PREFIX} identified {len(unlocked_deps)} unlocked env dependencies for installation using default backend: {[item.name for item in unlocked_deps]}"
+        f"{_REPORTER_PREFIX} identified {len(unlocked_deps)} unlocked env dependencies: {[item.name for item in unlocked_deps]}"
     )
 
     return _SortedEnvDeps(locked_deps=locked_deps, unlocked_deps=unlocked_deps)
@@ -129,6 +152,11 @@ def _install_to_venv(
     :param venv: Tox virtual environment to install the packages to
     :param packages: List of packages to install to the virtual environment
     """
+
+    reporter.verbosity1(
+        f"{_REPORTER_PREFIX} Installing {len(packages)} packages to environment at {venv.envconfig.envdir}"
+    )
+
     installer = PoetryPipInstaller(
         env=PoetryVirtualEnv(path=Path(venv.envconfig.envdir)),
         io=PoetryNullIO(),
@@ -140,7 +168,7 @@ def _install_to_venv(
         installer.install(dependency)
 
 
-def _find_transients(poetry: Poetry, dependency_name: str) -> Set[PoetryPackage]:
+def _find_transients(packages: PackageMap, dependency_name: str) -> Set[PoetryPackage]:
     """Using a poetry object identify all dependencies of a specific dependency
 
     :param poetry: Populated poetry object which can be used to build a populated locked
@@ -152,10 +180,6 @@ def _find_transients(poetry: Poetry, dependency_name: str) -> Set[PoetryPackage]
     .. note:: The package corresponding to the dependency named by ``dependency_name`` is included
               in the list of returned packages.
     """
-    packages: Dict[str, PoetryPackage] = {
-        package.name: package
-        for package in poetry.locker.locked_repository(True).packages
-    }
 
     try:
         top_level = packages[dependency_name]
@@ -163,7 +187,7 @@ def _find_transients(poetry: Poetry, dependency_name: str) -> Set[PoetryPackage]
         def find_deps_of_deps(name: str) -> List[PoetryPackage]:
             if name in PoetryProvider.UNSAFE_PACKAGES:
                 reporter.warning(
-                    f"{_REPORTER_PREFIX} installing '{name}' using Poetry is not supported; skipping"
+                    f"{_REPORTER_PREFIX} installing package '{name}' using Poetry is not supported; skipping installation of package '{name}'"
                 )
                 return []
             transients = [packages[name]]
@@ -185,20 +209,31 @@ def _find_transients(poetry: Poetry, dependency_name: str) -> Set[PoetryPackage]
         ) from None
 
 
-def _install_env_dependencies(venv: ToxVirtualEnv, poetry: Poetry):
+def _install_env_dependencies(
+    venv: ToxVirtualEnv, poetry: Poetry, packages: PackageMap
+):
+    """Install the packages for a specified testenv
+
+    Processes the tox environment config, identifies any locked environment dependencies, pulls
+    them from the lockfile, and installs them to the virtual environment.
+
+    :param venv: Tox virtual environment to install the packages to
+    :param poetry: Poetry object the packages were sourced from
+    :param packages: Mapping of package names to the corresponding package object
+    """
     env_deps = _sort_env_deps(venv)
 
     dependencies: List[PoetryPackage] = []
     for dep in env_deps.locked_deps:
         try:
-            dependencies += _find_transients(poetry, dep.name)
+            dependencies += _find_transients(packages, dep.name.lower())
         except ToxPoetryInstallerException as err:
             venv.status = "lockfile installation failed"
             reporter.error(f"{_REPORTER_PREFIX} {err}")
             raise err
 
     reporter.verbosity1(
-        f"{_REPORTER_PREFIX} identified {len(dependencies)} actual dependencies from {len(venv.envconfig.deps)} specified env dependencies"
+        f"{_REPORTER_PREFIX} identified {len(dependencies)} total dependencies from {len(env_deps.locked_deps)} locked env dependencies"
     )
 
     reporter.verbosity1(
@@ -212,21 +247,55 @@ def _install_env_dependencies(venv: ToxVirtualEnv, poetry: Poetry):
     _install_to_venv(poetry, venv, dependencies)
 
 
-def _install_package_dependencies(venv: ToxVirtualEnv, poetry: Poetry):
+def _install_project_dependencies(
+    venv: ToxVirtualEnv, poetry: Poetry, packages: PackageMap
+):
+    """Install the dependencies of the project package
+
+    Install all primary dependencies of the project package.
+
+    :param venv: Tox virtual environment to install the packages to
+    :param poetry: Poetry object the packages were sourced from
+    :param packages: Mapping of package names to the corresponding package object
+    """
     reporter.verbosity1(
         f"{_REPORTER_PREFIX} performing installation of project dependencies"
     )
 
-    primary_dependencies = poetry.locker.locked_repository(False).packages
+    base_dependencies: List[PoetryPackage] = [
+        packages[item.name]
+        for item in poetry.package.requires
+        if not item.is_optional()
+    ]
+
+    extra_dependencies: List[PoetryPackage] = []
+    for extra in venv.envconfig.extras:
+        try:
+            extra_dependencies += [
+                packages[item.name] for item in poetry.package.extras[extra]
+            ]
+        except KeyError:
+            raise ExtraNotFoundError(
+                f"Environment '{venv.name}' specifies project extra '{extra}' which was not found in the lockfile"
+            ) from None
+
+    dependencies: List[PoetryPackage] = []
+    for dep in base_dependencies + extra_dependencies:
+        try:
+            dependencies += _find_transients(packages, dep.name.lower())
+        except ToxPoetryInstallerException as err:
+            venv.status = "lockfile installation failed"
+            reporter.error(f"{_REPORTER_PREFIX} {err}")
+            raise err
 
     reporter.verbosity1(
-        f"{_REPORTER_PREFIX} identified {len(primary_dependencies)} dependencies of project '{poetry.package.name}'"
+        f"{_REPORTER_PREFIX} identified {len(dependencies)} total dependencies from {len(poetry.package.requires)} project dependencies"
     )
 
     reporter.verbosity0(
-        f"{_REPORTER_PREFIX} ({venv.name}) installing {len(primary_dependencies)} project dependencies from lockfile"
+        f"{_REPORTER_PREFIX} ({venv.name}) installing {len(dependencies)} project dependencies from lockfile"
     )
-    _install_to_venv(poetry, venv, primary_dependencies)
+    _install_to_venv(poetry, venv, dependencies)
 
 
 @hookimpl
@@ -266,25 +335,43 @@ def tox_testenv_install_deps(venv: ToxVirtualEnv, action: ToxAction):
         )
         return
 
-    poetry = PoetryFactory().create_poetry(venv.envconfig.config.toxinidir)
+    try:
+        poetry = PoetryFactory().create_poetry(venv.envconfig.config.toxinidir)
+    except RuntimeError:
+        # Support running the plugin when the current tox project does not use Poetry for its
+        # environment/dependency management.
+        #
+        # ``RuntimeError`` is dangerous to blindly catch because it can be (and in Poetry's case,
+        # is) raised in many different places for different purposes.
+        reporter.verbosity1(
+            f"{_REPORTER_PREFIX} project does not use Poetry for env management, skipping installation of locked dependencies"
+        )
+        return
 
     reporter.verbosity1(
         f"{_REPORTER_PREFIX} loaded project pyproject.toml from {poetry.file}"
     )
 
+    package_map: PackageMap = {
+        package.name: package
+        for package in poetry.locker.locked_repository(True).packages
+    }
+
     # Handle the installation of any locked env dependencies from the lockfile
-    _install_env_dependencies(venv, poetry)
+    _install_env_dependencies(venv, poetry, package_map)
 
     # Handle the installation of the package dependencies from the lockfile if the package is
     # being installed to this venv; otherwise skip installing the package dependencies
-    if not venv.envconfig.skip_install and not venv.envconfig.config.skipsdist:
-        _install_package_dependencies(venv, poetry)
-    else:
-        if venv.envconfig.skip_install:
-            reporter.verbosity1(
-                f"{_REPORTER_PREFIX} env specifies 'skip_install = true', skipping installation of project package"
-            )
-        elif venv.envconfig.config.skipsdist:
-            reporter.verbosity1(
-                f"{_REPORTER_PREFIX} config specifies 'skipsdist = true', skipping installation of project package"
-            )
+    if venv.envconfig.skip_install:
+        reporter.verbosity1(
+            f"{_REPORTER_PREFIX} env specifies 'skip_install = true', skipping installation of project package"
+        )
+        return
+
+    if venv.envconfig.config.skipsdist:
+        reporter.verbosity1(
+            f"{_REPORTER_PREFIX} config specifies 'skipsdist = true', skipping installation of project package"
+        )
+        return
+
+    _install_project_dependencies(venv, poetry, package_map)