Merge pull request #75 from enpaul/enp/bugfix

Fix poetry dependency spec to <1.2 for last 0.8 release

.pylintrc

@@ -1,46 +1,5 @@
-[MASTER]
-
-# A comma-separated list of package or module names from where C extensions may
-# be loaded. Extensions are loading into the active Python interpreter and may
-# run arbitrary code
-extension-pkg-whitelist=
-
-# Add files or directories to the blacklist. They should be base names, not
-# paths.
-ignore=
-
-# Add files or directories matching the regex patterns to the blacklist. The
-# regex matches against base names, not paths.
-ignore-patterns=
-
-# Python code to execute, usually for sys.path manipulation such as
-# pygtk.require().
-#init-hook=
-
-# Use multiple processes to speed up Pylint.
-jobs=1
-
-# List of plugins (as comma separated values of python modules names) to load,
-# usually to register additional checkers.
-load-plugins=
-
-# Pickle collected data for later comparisons.
-persistent=yes
-
-# Specify a configuration file.
-#rcfile=
-
-# Allow loading of arbitrary C extensions. Extensions are imported into the
-# active Python interpreter and may run arbitrary code.
-unsafe-load-any-extension=no
-
-
 [MESSAGES CONTROL]
 
-# Only show warnings with the listed confidence levels. Leave empty to show
-# all. Valid levels: HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED
-confidence=
-
 # Disable the message, report, category or checker with the given id(s). You
 # can either give multiple identifiers separated by comma (,) or put this
 # option multiple times (only on the command line, not in the configuration
@@ -50,378 +9,47 @@ confidence=
 # --enable=similarities". If you want to run only the classes checker, but have
 # no Warning level messages displayed, use"--disable=all --enable=classes
 # --disable=W"
-disable=logging-fstring-interpolation, logging-format-interpolation, bad-continuation, line-too-long
+disable=logging-fstring-interpolation
-#print-statement,parameter-unpacking,unpacking-in-except,old-raise-syntax,backtick,long-suffix,old-ne-operator,old-octal-literal,import-star-module-level,raw-checker-failed,bad-inline-option,locally-disabled,locally-enabled,file-ignored,suppressed-message,useless-suppression,deprecated-pragma,apply-builtin,basestring-builtin,buffer-builtin,cmp-builtin,coerce-builtin,execfile-builtin,file-builtin,long-builtin,raw_input-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,no-absolute-import,old-division,dict-iter-method,dict-view-method,next-method-called,metaclass-assignment,indexing-exception,raising-string,reload-builtin,oct-method,hex-method,nonzero-method,cmp-method,input-builtin,round-builtin,intern-builtin,unichr-builtin,map-builtin-not-iterating,zip-builtin-not-iterating,range-builtin-not-iterating,filter-builtin-not-iterating,using-cmp-argument,eq-without-hash,div-method,idiv-method,rdiv-method,exception-message-attribute,invalid-str-codec,sys-max-int,bad-python3-import,deprecated-string-function,deprecated-str-translate-call,
+        ,logging-format-interpolation
-
+        ,bad-continuation
-# Enable the message, report, category or checker with the given id(s). You can
+        ,line-too-long
-# either give multiple identifier separated by comma (,) or put this option
+        ,ungrouped-imports
-# multiple time (only on the command line, not in the configuration file where
+        ,typecheck
-# it should appear only once). See also the "--disable" option for examples.
+        ,wrong-import-order
-enable=
+        ,wrong-import-position
 
 
 [REPORTS]
 
-# Python expression which should return a note less than 10 (10 is the highest
-# note). You have access to the variables errors warning, statement which
-# respectively contain the number of errors / warnings messages and the total
-# number of statements analyzed. This is used by the global evaluation report
-# (RP0004).
-evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)
-
-# Template used to display messages. This is a python new-style format string
-# used to format the message information. See doc for all details
-#msg-template=
-
 # Set the output format. Available formats are text, parseable, colorized, json
 # and msvs (visual studio).You can also give a reporter class, eg
 # mypackage.mymodule.MyReporterClass.
-output-format=text
+output-format=colorized
-
-# Tells whether to display a full report or only the messages
-reports=no
-
-# Activate the evaluation score.
-score=yes
-
-
-[REFACTORING]
-
-# Maximum number of nested blocks for function / method body
-max-nested-blocks=5
 
 
 [BASIC]
 
-# Naming hint for argument names
-argument-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
-# Regular expression matching correct argument names
-argument-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
-# Naming hint for attribute names
-attr-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
-# Regular expression matching correct attribute names
-attr-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
-# Bad variable names which should always be refused, separated by a comma
-bad-names=foo,bar,baz,toto,tutu,tata
-
-# Naming hint for class attribute names
-class-attribute-name-hint=([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$
-
-# Regular expression matching correct class attribute names
-class-attribute-rgx=([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$
-
-# Naming hint for class names
-class-name-hint=[A-Z_][a-zA-Z0-9]+$
-
-# Regular expression matching correct class names
-class-rgx=[A-Z_][a-zA-Z0-9]+$
-
-# Naming hint for constant names
-const-name-hint=(([A-Z_][A-Z0-9_]*)|(__.*__))$
-
-# Regular expression matching correct constant names
-const-rgx=(([A-Z_][A-Z0-9_]*)|(__.*__))$
-
-# Minimum line length for functions/classes that require docstrings, shorter
-# ones are exempt.
-docstring-min-length=-1
-
-# Naming hint for function names
-function-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
-# Regular expression matching correct function names
-function-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
 # Good variable names which should always be accepted, separated by a comma
-good-names=_,ip,ap
+good-names=_,ip,T
-
-# Include a hint for the correct naming format with invalid-name
-include-naming-hint=no
-
-# Naming hint for inline iteration names
-inlinevar-name-hint=[A-Za-z_][A-Za-z0-9_]*$
-
-# Regular expression matching correct inline iteration names
-inlinevar-rgx=[A-Za-z_][A-Za-z0-9_]*$
-
-# Naming hint for method names
-method-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
-# Regular expression matching correct method names
-method-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
-# Naming hint for module names
-module-name-hint=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+))$
-
-# Regular expression matching correct module names
-module-rgx=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+))$
-
-# Colon-delimited sets of names that determine each other's naming style when
-# the name regexes allow several styles.
-name-group=
-
-# Regular expression which should only match function or class names that do
-# not require a docstring.
-no-docstring-rgx=^_
-
-# List of decorators that produce properties, such as abc.abstractproperty. Add
-# to this list to register other decorators that produce valid properties.
-property-classes=abc.abstractproperty
-
-# Naming hint for variable names
-variable-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
-
-# Regular expression matching correct variable names
-variable-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
 
 
 [MISCELLANEOUS]
-
+# Not FIXME or TODO
-# List of note tags to take in consideration, separated by a comma.
-#notes=FIXME,XXX,TODO
 notes=XXX
 
 
-[LOGGING]
-
-# Logging modules to check that the string format arguments are in logging
-# function parameter format
-logging-modules=logging
-
-
 [SIMILARITIES]
 
-# Ignore comments when computing similarities.
-ignore-comments=yes
-
-# Ignore docstrings when computing similarities.
-ignore-docstrings=yes
-
 # Ignore imports when computing similarities.
 ignore-imports=yes
 
+# Ignore function signatures when computing similarities.
+ignore-signatures=yes
+
 # Minimum lines number of a similarity.
 min-similarity-lines=10
 
-
-[VARIABLES]
-
-# List of additional names supposed to be defined in builtins. Remember that
-# you should avoid to define new builtins when possible.
-additional-builtins=
-
-# Tells whether unused global variables should be treated as a violation.
-allow-global-unused-variables=yes
-
-# List of strings which can identify a callback function by name. A callback
-# name must start or end with one of those strings.
-callbacks=cb_,_cb
-
-# A regular expression matching the name of dummy variables (i.e. expectedly
-# not used).
-dummy-variables-rgx=_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|dummy|^ignored_|^unused_
-
-# Argument names that match this expression will be ignored. Default to name
-# with leading underscore
-ignored-argument-names=_.*|^ignored_|^unused_|^fxt_
-
-# Tells whether we should check for unused import in __init__ files.
-init-import=no
-
-# List of qualified module names which can have objects that can redefine
-# builtins.
-redefining-builtins-modules=six.moves,future.builtins
-
-
-[SPELLING]
-
-# Spelling dictionary name. Available dictionaries: none. To make it working
-# install python-enchant package.
-spelling-dict=
-
-# List of comma separated words that should not be checked.
-spelling-ignore-words=
-
-# A path to a file that contains private dictionary; one word per line.
-spelling-private-dict-file=
-
-# Tells whether to store unknown words to indicated private dictionary in
-# --spelling-private-dict-file option instead of raising a message.
-spelling-store-unknown-words=no
-
-
-[FORMAT]
-
-# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
-expected-line-ending-format=
-
-# Regexp for a line that is allowed to be longer than the limit.
-ignore-long-lines=^\s*(# )?<?https?://\S+>?$
-
-# Number of spaces of indent required inside a hanging  or continued line.
-indent-after-paren=4
-
-# String used as indentation unit. This is usually "    " (4 spaces) or "\t" (1
-# tab).
-indent-string='    '
-
-# Maximum number of characters on a single line.
-max-line-length=100
-
-# Maximum number of lines in a module
-max-module-lines=1000
-
-# List of optional constructs for which whitespace checking is disabled. `dict-
-# separator` is used to allow tabulation in dicts, etc.: {1  : 1,\n222: 2}.
-# `trailing-comma` allows a space between comma and closing bracket: (a, ).
-# `empty-line` allows space-only lines.
-no-space-check=trailing-comma,dict-separator
-
-# Allow the body of a class to be on the same line as the declaration if body
-# contains single statement.
-single-line-class-stmt=no
-
-# Allow the body of an if to be on the same line as the test if there is no
-# else.
-single-line-if-stmt=no
-
-
-[TYPECHECK]
-
-# List of decorators that produce context managers, such as
-# contextlib.contextmanager. Add to this list to register other decorators that
-# produce valid context managers.
-contextmanager-decorators=contextlib.contextmanager
-
-# List of members which are set dynamically and missed by pylint inference
-# system, and so shouldn't trigger E1101 when accessed. Python regular
-# expressions are accepted.
-generated-members=
-
-# Tells whether missing members accessed in mixin class should be ignored. A
-# mixin class is detected if its name ends with "mixin" (case insensitive).
-ignore-mixin-members=yes
-
-# This flag controls whether pylint should warn about no-member and similar
-# checks whenever an opaque object is returned when inferring. The inference
-# can return multiple potential results while evaluating a Python object, but
-# some branches might not be evaluated, which results in partial inference. In
-# that case, it might be useful to still emit no-member and other checks for
-# the rest of the inferred objects.
-ignore-on-opaque-inference=yes
-
-# List of class names for which member attributes should not be checked (useful
-# for classes with dynamically set attributes). This supports the use of
-# qualified names.
-ignored-classes=optparse.Values,thread._local,_thread._local
-
-# List of module names for which member attributes should not be checked
-# (useful for modules/projects where namespaces are manipulated during runtime
-# and thus existing member attributes cannot be deduced by static analysis. It
-# supports qualified module names, as well as Unix pattern matching.
-ignored-modules=
-
-# Show a hint with possible names when a member name was not found. The aspect
-# of finding the hint is based on edit distance.
-missing-member-hint=yes
-
-# The minimum edit distance a name should have in order to be considered a
-# similar match for a missing member name.
-missing-member-hint-distance=1
-
-# The total number of similar names that should be taken in consideration when
-# showing a hint for a missing member.
-missing-member-max-choices=1
-
-
-[CLASSES]
-
-# List of method names used to declare (i.e. assign) instance attributes.
-defining-attr-methods=__init__,__new__,setUp
-
-# List of member names, which should be excluded from the protected access
-# warning.
-exclude-protected=_asdict,_fields,_replace,_source,_make
-
-# List of valid names for the first argument in a class method.
-valid-classmethod-first-arg=cls
-
-# List of valid names for the first argument in a metaclass class method.
-valid-metaclass-classmethod-first-arg=mcs
-
-
-[IMPORTS]
-
-# Allow wildcard imports from modules that define __all__.
-allow-wildcard-with-all=no
-
-# Analyse import fallback blocks. This can be used to support both Python 2 and
-# 3 compatible code, which means that the block might have code that exists
-# only in one or another interpreter, leading to false positives when analysed.
-analyse-fallback-blocks=no
-
-# Deprecated modules which should not be used, separated by a comma
-deprecated-modules=regsub,TERMIOS,Bastion,rexec
-
-# Create a graph of external dependencies in the given file (report RP0402 must
-# not be disabled)
-ext-import-graph=
-
-# Create a graph of every (i.e. internal and external) dependencies in the
-# given file (report RP0402 must not be disabled)
-import-graph=
-
-# Create a graph of internal dependencies in the given file (report RP0402 must
-# not be disabled)
-int-import-graph=
-
-# Force import order to recognize a module as part of the standard
-# compatibility libraries.
-known-standard-library=
-
-# Force import order to recognize a module as part of a third party library.
-known-third-party=enchant
-
-
 [DESIGN]
 
 # Maximum number of arguments for function / method
 max-args=7
-
-# Maximum number of attributes for a class (see R0902).
-max-attributes=7
-
-# Maximum number of boolean expressions in a if statement
-max-bool-expr=5
-
-# Maximum number of branch for function / method body
-max-branches=12
-
-# Maximum number of locals for function / method body
-max-locals=15
-
-# Maximum number of parents for a class (see R0901).
-max-parents=7
-
-# Maximum number of public methods for a class (see R0904).
-max-public-methods=20
-
-# Maximum number of return / yield for function / method body
-max-returns=6
-
-# Maximum number of statements in function / method body
-max-statements=50
-
-# Minimum number of public methods for a class (see R0903).
-min-public-methods=2
-
-
-[EXCEPTIONS]
-
-# Exceptions that will emit a warning when being caught. Defaults to
-# "Exception"
-overgeneral-exceptions=Exception

CHANGELOG.md

@@ -2,6 +2,23 @@
 
 See also: [Github Release Page](https://github.com/enpaul/tox-poetry-installer/releases).
 
+## Version 0.8.5
+
+View this release on:
+[Github](https://github.com/enpaul/tox-poetry-installer/releases/tag/0.8.5),
+[PyPI](https://pypi.org/project/tox-poetry-installer/0.8.5/)
+
+- Fix Poetry version specification supporting the incompatible Poetry-1.2.0 release
+
+## Version 0.8.4
+
+View this release on:
+[Github](https://github.com/enpaul/tox-poetry-installer/releases/tag/0.8.4),
+[PyPI](https://pypi.org/project/tox-poetry-installer/0.8.4/)
+
+- Fix issue where incompatible package versions were selected for installation when multiple
+  package versions were in the lockfile
+
 ## Version 0.8.3
 
 View this release on:

README.md

@@ -230,7 +230,7 @@ error will be set to one of the "Status" values below to indicate what the error
 | `LockedDepVersionConflictError` | Indicates that an item in the `locked_deps` config option includes a [PEP-508 version specifier](https://www.python.org/dev/peps/pep-0508/#grammar) (ex: `pytest >=6.0, <6.1`).                                                 |
 | `LockedDepNotFoundError`        | Indicates that an item specified in the `locked_deps` config option does not match the name of a package in the Poetry lockfile.                                                                                                |
 | `LockedDepsRequiredError`       | Indicates that a test environment with the `require_locked_deps` config option set to `true` also specified unlocked dependencies using the [`deps`](https://tox.readthedocs.io/en/latest/config.html#conf-deps) config option. |
-| `PoetryNotInstalledError`       | Indicates that the `poetry` module could not be imported under the current runtime environment, and the `--require-poetry` flag was provided.                                                                                   |
+| `PoetryNotInstalledError`       | Indicates that the `poetry` module could not be imported under the current runtime environment, and `require_poetry = true` was specified.                                                                                      |
 | `RequiresUnsafeDepError`        | Indicates that the package-under-test depends on a package that Poetry has classified as unsafe and cannot be installed.                                                                                                        |
 
 > **Note:** One or more of these errors can be caused by the `pyproject.toml` being out of

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "tox-poetry-installer"
-version = "0.8.3"
+version = "0.8.5"
 license = "MIT"
 authors = ["Ethan Paul <24588726+enpaul@users.noreply.github.com>"]
 description = "A plugin for Tox that lets you install test environment dependencies from the Poetry lockfile"
@@ -39,21 +39,21 @@ poetry = ["poetry"]
 
 [tool.poetry.dependencies]
 python = "^3.6.1"
-poetry = {version = "^1.0.0", optional = true}
+poetry = {version = ">=1.0.0,<1.2", optional = true}
 poetry-core = "^1.0.0"
 tox = "^3.8.0"
 
 [tool.poetry.dev-dependencies]
 bandit = "^1.6.2"
 black = { version = "^21.12b0", allow-prereleases = true, python = "^3.7" }
-blacken-docs = "^1.8.0"
+blacken-docs = { version = "^1.8.0", python = "^3.7" }
 ipython = { version = "^7.18.1", python = "^3.7" }
 mdformat = "^0.6"
 mdformat-gfm = "^0.2"
 mypy = "^0.930"
 pre-commit = "^2.7.1"
 pre-commit-hooks = "^3.3.0"
-pylint = "^2.4.4"
+pylint = { version = "^2.13.0", python = "^3.7" }
 pytest = "^6.0.2"
 pytest-cov = "^2.10.1"
 reorder-python-imports = "^2.3.5"

tests/fixtures.py

@@ -31,6 +31,10 @@ class MockVirtualEnv:
     def is_valid_for_marker(*args, **kwargs):
         return True
 
+    @staticmethod
+    def get_version_info():
+        return (1, 2, 3)
+
 
 class MockPipInstaller:
     """Mock class for the :class:`poetry.installation.pip_installer.PipInstaller`"""

tests/test_installer.py

@@ -6,14 +6,14 @@ from poetry.factory import Factory
 
 from .fixtures import mock_poetry_factory
 from .fixtures import mock_venv
-from tox_poetry_installer import datatypes
 from tox_poetry_installer import installer
+from tox_poetry_installer import utilities
 
 
 def test_deduplication(mock_venv, mock_poetry_factory):
     """Test that the installer does not install duplicate dependencies"""
     poetry = Factory().create_poetry(None)
-    packages: datatypes.PackageMap = {
+    packages: utilities.PackageMap = {
         item.name: item for item in poetry.locker.locked_repository(False).packages
     }
 
@@ -28,7 +28,7 @@ def test_deduplication(mock_venv, mock_poetry_factory):
 def test_parallelization(mock_venv, mock_poetry_factory):
     """Test that behavior is consistent between parallel and non-parallel usage"""
     poetry = Factory().create_poetry(None)
-    packages: datatypes.PackageMap = {
+    packages: utilities.PackageMap = {
         item.name: item for item in poetry.locker.locked_repository(False).packages
     }
 

tests/test_transients.py

@@ -7,7 +7,6 @@ from poetry.puzzle.provider import Provider
 from .fixtures import mock_poetry_factory
 from .fixtures import mock_venv
 from tox_poetry_installer import constants
-from tox_poetry_installer import datatypes
 from tox_poetry_installer import exceptions
 from tox_poetry_installer import utilities
 
@@ -58,17 +57,15 @@ def test_functional(mock_poetry_factory, mock_venv):
     is always the last in the returned list.
     """
     pypoetry = poetry.factory.Factory().create_poetry(None)
-    packages: datatypes.PackageMap = {
+    packages = utilities.build_package_map(pypoetry)
-        item.name: item for item in pypoetry.locker.locked_repository(False).packages
-    }
     venv = poetry.utils.env.VirtualEnv()  # pylint: disable=no-value-for-parameter
 
     requests_requires = [
-        packages["certifi"],
+        packages["certifi"][0],
-        packages["chardet"],
+        packages["chardet"][0],
-        packages["idna"],
+        packages["idna"][0],
-        packages["urllib3"],
+        packages["urllib3"][0],
-        packages["requests"],
+        packages["requests"][0],
     ]
 
     transients = utilities.identify_transients("requests", packages, venv)
@@ -76,7 +73,7 @@ def test_functional(mock_poetry_factory, mock_venv):
     assert all((item in requests_requires) for item in transients)
     assert all((item in transients) for item in requests_requires)
 
-    for package in [packages["requests"], packages["tox"], packages["flask"]]:
+    for package in [packages["requests"][0], packages["tox"][0], packages["flask"][0]]:
-        transients = utilities.identify_transients(package, packages, venv)
+        transients = utilities.identify_transients(package.name, packages, venv)
         assert transients[-1] == package
         assert len(transients) == len(set(transients))

tox_poetry_installer/__about__.py

@@ -1,7 +1,7 @@
 # pylint: disable=missing-docstring
 __title__ = "tox-poetry-installer"
 __summary__ = "A plugin for Tox that lets you install test environment dependencies from the Poetry lockfile"
-__version__ = "0.8.3"
+__version__ = "0.8.5"
 __url__ = "https://github.com/enpaul/tox-poetry-installer/"
 __license__ = "MIT"
 __authors__ = ["Ethan Paul <24588726+enpaul@users.noreply.github.com>"]

tox_poetry_installer/datatypes.py

@@ -1,8 +0,0 @@
-"""Definitions for typehints/containers used by the plugin"""
-from typing import Dict
-
-from poetry.core.packages import Package as PoetryPackage
-
-
-# Map of package names to the package object
-PackageMap = Dict[str, PoetryPackage]

tox_poetry_installer/hooks.py

@@ -17,7 +17,6 @@ from tox_poetry_installer import exceptions
 from tox_poetry_installer import installer
 from tox_poetry_installer import logger
 from tox_poetry_installer import utilities
-from tox_poetry_installer.datatypes import PackageMap
 
 
 def _postprocess_install_project_deps(
@@ -186,10 +185,7 @@ def tox_testenv_install_deps(venv: ToxVirtualEnv, action: ToxAction) -> Optional
                 f"Unlocked dependencies '{venv.envconfig.deps}' specified for environment '{venv.name}' which requires locked dependencies"
             )
 
-        packages: PackageMap = {
+        packages = utilities.build_package_map(poetry)
-            package.name: package
-            for package in poetry.locker.locked_repository(True).packages
-        }
 
         if venv.envconfig.install_dev_deps:
             dev_deps = utilities.find_dev_deps(packages, virtualenv, poetry)

tox_poetry_installer/utilities.py

@@ -2,12 +2,13 @@
 # Silence this one globally to support the internal function imports for the proxied poetry module.
 # See the docstring in 'tox_poetry_installer._poetry' for more context.
 # pylint: disable=import-outside-toplevel
+import collections
 import typing
 from pathlib import Path
+from typing import Dict
 from typing import List
 from typing import Sequence
 from typing import Set
-from typing import Union
 
 from poetry.core.packages import Dependency as PoetryDependency
 from poetry.core.packages import Package as PoetryPackage
@@ -17,12 +18,14 @@ from tox.venv import VirtualEnv as ToxVirtualEnv
 from tox_poetry_installer import constants
 from tox_poetry_installer import exceptions
 from tox_poetry_installer import logger
-from tox_poetry_installer.datatypes import PackageMap
 
 if typing.TYPE_CHECKING:
     from tox_poetry_installer import _poetry
 
 
+PackageMap = Dict[str, List[PoetryPackage]]
+
+
 def check_preconditions(venv: ToxVirtualEnv, action: ToxAction) -> "_poetry.Poetry":
     """Check that the local project environment meets expectations"""
     # Skip running the plugin for the provisioning environment. The provisioned environment,
@@ -82,15 +85,28 @@ def convert_virtualenv(venv: ToxVirtualEnv) -> "_poetry.VirtualEnv":
     return _poetry.VirtualEnv(path=Path(venv.envconfig.envdir))
 
 
+def build_package_map(poetry: "_poetry.Poetry") -> PackageMap:
+    """Build the mapping of package names to objects
+
+    :param poetry: Populated poetry object to load locked packages from
+    :returns: Mapping of package names to Poetry package objects
+    """
+    packages = collections.defaultdict(list)
+    for package in poetry.locker.locked_repository(True).packages:
+        packages[package.name].append(package)
+
+    return packages
+
+
 def identify_transients(
-    dep: Union[PoetryDependency, str],
+    dep_name: str,
     packages: PackageMap,
     venv: "_poetry.VirtualEnv",
     allow_missing: Sequence[str] = (),
 ) -> List[PoetryPackage]:
     """Using a pool of packages, identify all transient dependencies of a given package name
 
-    :param dep: Either the Poetry dependency or the dependency's bare package name to recursively
+    :param dep_name: Either the Poetry dependency or the dependency's bare package name to recursively
                      identify the transient dependencies of
     :param packages: All packages from the lockfile to use for identifying dependency relationships.
     :param venv: Poetry virtual environment to use for package compatibility checks
@@ -102,53 +118,64 @@ def identify_transients(
     .. note:: The package corresponding to the dependency specified by the ``dep`` parameter will
               be included in the returned list of packages.
     """
-    transients: List[PoetryPackage] = []
     searched: Set[str] = set()
 
-    def _deps_of_dep(transient: PoetryDependency):
+    def _transients(transient: PoetryDependency) -> List[PoetryPackage]:
         searched.add(transient.name)
 
-        if venv.is_valid_for_marker(transient.marker):
+        results: List[PoetryPackage] = []
-            for requirement in packages[transient.name].requires:
+        for option in packages[transient.name]:
+            if venv.is_valid_for_marker(option.to_dependency().marker):
+                for requirement in option.requires:
                     if requirement.name not in searched:
-                    _deps_of_dep(requirement)
+                        results += _transients(requirement)
-            logger.debug(f"Including {transient} for installation")
+                logger.debug(f"Including {option} for installation")
-            transients.append(packages[transient.name])
+                results.append(option)
+                break
         else:
-            logger.debug(f"Skipping {transient}: package requires {transient.marker}")
+            logger.debug(
+                f"Skipping {transient.name}: target python version is {'.'.join([str(item) for item in venv.get_version_info()])} but package requires {transient.marker}"
+            )
+
+        return results
 
     try:
-        if isinstance(dep, str):
+        for option in packages[dep_name]:
-            dep = packages[dep].to_dependency()
+            if venv.is_valid_for_marker(option.to_dependency().marker):
-
+                dep = option.to_dependency()
-        _deps_of_dep(dep)
+                break
-    except KeyError as err:
+        else:
-        dep_name = err.args[0]
-
-        if dep_name in constants.UNSAFE_PACKAGES:
             logger.warning(
-                f"Installing package '{dep_name}' using Poetry is not supported and will be skipped"
+                f"Skipping {dep_name}: no locked version found compatible with target python version {'.'.join([str(item) for item in venv.get_version_info()])}"
             )
-            logger.debug(f"Skipping {dep_name}: designated unsafe by Poetry")
             return []
 
-        if dep_name in allow_missing:
+        return _transients(dep)
-            logger.debug(f"Skipping {dep_name}: package is allowed to be unlocked")
+    except KeyError as err:
+        missing = err.args[0]
+
+        if missing in constants.UNSAFE_PACKAGES:
+            logger.warning(
+                f"Installing package '{missing}' using Poetry is not supported and will be skipped"
+            )
+            logger.debug(f"Skipping {missing}: designated unsafe by Poetry")
+            return []
+
+        if missing in allow_missing:
+            logger.debug(f"Skipping {missing}: package is allowed to be unlocked")
             return []
 
         if any(
-            delimiter in dep_name for delimiter in constants.PEP508_VERSION_DELIMITERS
+            delimiter in missing for delimiter in constants.PEP508_VERSION_DELIMITERS
         ):
             raise exceptions.LockedDepVersionConflictError(
-                f"Locked dependency '{dep_name}' cannot include version specifier"
+                f"Locked dependency '{missing}' cannot include version specifier"
             ) from None
 
         raise exceptions.LockedDepNotFoundError(
-            f"No version of locked dependency '{dep_name}' found in the project lockfile"
+            f"No version of locked dependency '{missing}' found in the project lockfile"
         ) from None
 
-    return transients
-
 
 def find_project_deps(
     packages: PackageMap,
@@ -171,26 +198,24 @@ def find_project_deps(
             f"Project package requires one or more unsafe dependencies ({', '.join(constants.UNSAFE_PACKAGES)}) which cannot be installed with Poetry"
         )
 
-    base_deps: List[PoetryPackage] = [
+    required_dep_names = [
-        packages[item.name]
+        item.name for item in poetry.package.requires if not item.is_optional()
-        for item in poetry.package.requires
-        if not item.is_optional()
     ]
 
-    extra_deps: List[PoetryPackage] = []
+    extra_dep_names: List[str] = []
     for extra in extras:
         logger.info(f"Processing project extra '{extra}'")
         try:
-            extra_deps += [packages[item.name] for item in poetry.package.extras[extra]]
+            extra_dep_names += [item.name for item in poetry.package.extras[extra]]
         except KeyError:
             raise exceptions.ExtraNotFoundError(
                 f"Environment specifies project extra '{extra}' which was not found in the lockfile"
             ) from None
 
     dependencies: List[PoetryPackage] = []
-    for dep in base_deps + extra_deps:
+    for dep_name in required_dep_names + extra_dep_names:
         dependencies += identify_transients(
-            dep.name.lower(), packages, venv, allow_missing=[poetry.package.name]
+            dep_name.lower(), packages, venv, allow_missing=[poetry.package.name]
         )
 
     return dependencies
@@ -212,13 +237,13 @@ def find_additional_deps(
     :param dep_names: Sequence of additional dependency names to recursively find the transient
                       dependencies for
     """
-    deps: List[PoetryPackage] = []
+    dependencies: List[PoetryPackage] = []
     for dep_name in dep_names:
-        deps += identify_transients(
+        dependencies += identify_transients(
             dep_name.lower(), packages, venv, allow_missing=[poetry.package.name]
         )
 
-    return deps
+    return dependencies
 
 
 def find_dev_deps(