drop support for python 3.7

Author: dimbleby

.cirrus.yml

@@ -12,7 +12,6 @@ test_task:
     # avoid failures on tests that depend on it.
     SHELL: sh
     matrix:
-      - PYTHON: python3.7
       - PYTHON: python3.8
       - PYTHON: python3.9
       - PYTHON: python3.10

.github/workflows/main.yml

@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os: [Ubuntu, macOS, Windows]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
         include:
           - os: Ubuntu
             image: ubuntu-22.04

.github/workflows/skip.yml

@@ -28,6 +28,6 @@ jobs:
     strategy:
       matrix:
         os: [Ubuntu, macOS, Windows]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
     steps:
       - run: exit 0

.pre-commit-config.yaml

@@ -31,7 +31,7 @@ repos:
     rev: v3.3.2
     hooks:
       - id: pyupgrade
-        args: [--py37-plus]
+        args: [--py38-plus]
         exclude: ^install-poetry.py$
 
   - repo: https://github.com/hadialqattan/pycln

docs/_index.md

@@ -18,7 +18,7 @@ Poetry offers a lockfile to ensure repeatable installs, and can build your proje
 
 ## System requirements
 
-Poetry requires **Python 3.7+**. It is multi-platform and the goal is to make it work equally well
+Poetry requires **Python 3.8+**. It is multi-platform and the goal is to make it work equally well
 on Linux, macOS and Windows.
 
 ## Installation

poetry.lock

@@ -45,11 +45,10 @@ generate-setup-file = false
 
 # Requirements
 [tool.poetry.dependencies]
-python = "^3.7"
+python = "^3.8"
 
 poetry-core = "1.5.2"
 poetry-plugin-export = "^1.3.1"
-"backports.cached-property" = { version = "^1.0.2", python = "<3.8" }
 build = "^0.10.0"
 cachecontrol = { version = "^0.12.9", extras = ["filecache"] }
 cleo = "^2.0.0"
@@ -97,14 +96,12 @@ pytest-cov = "^4.0"
 pytest-mock = "^3.9"
 pytest-randomly = "^3.12"
 pytest-xdist = { version = "^3.1", extras = ["psutil"] }
-zipp = { version = "^3.4", python = "<3.8" }
 
 [tool.poetry.group.typing.dependencies]
 mypy = ">=1.0"
 types-html5lib = ">=1.1.9"
 types-jsonschema = ">=4.9.0"
 types-requests = ">=2.28.8"
-typing-extensions = { version = "^4.0.0", python = "<3.8" }
 
 # only used in github actions
 [tool.poetry.group.github-actions]
@@ -127,7 +124,7 @@ fix = true
 unfixable = [
     "ERA",  # do not autoremove commented out code
 ]
-target-version = "py37"
+target-version = "py38"
 line-length = 88
 extend-select = [
     "B",  # flake8-bugbear
@@ -158,7 +155,7 @@ ban-relative-imports = "all"
 
 
 [tool.isort]
-py_version = 37
+py_version = 38
 profile = "black"
 force_single_line = true
 combine_as_imports = true
@@ -170,7 +167,7 @@ known_third_party = ["poetry.core"]
 
 
 [tool.black]
-target-version = ['py37']
+target-version = ['py38']
 preview = true
 force-exclude = '''
 .*/setup\.py$
@@ -195,9 +192,9 @@ exclude = [
   "tests/utils/fixtures"
 ]
 
-# use of importlib-metadata backport at python3.7 makes it impossible to
-# satisfy mypy without some ignores: but we get a different set of ignores at
-# different python versions.
+# use of importlib-metadata backport makes it impossible to satisfy mypy
+# without some ignores: but we get a different set of ignores at different
+# python versions.
 #
 # <https://github.com/python/mypy/issues/8823>, meanwhile suppress that
 # warning.

pyproject.toml

@@ -3,6 +3,7 @@
 import logging
 import re
 
+from functools import cached_property
 from typing import TYPE_CHECKING
 from typing import DefaultDict
 from typing import List
@@ -11,7 +12,6 @@
 from poetry.core.packages.package import Package
 from poetry.core.version.exceptions import InvalidVersion
 
-from poetry.utils._compat import cached_property
 from poetry.utils.patterns import sdist_file_re
 from poetry.utils.patterns import wheel_file_re
 

src/poetry/repositories/link_sources/base.py

@@ -4,13 +4,13 @@
 import warnings
 
 from collections import defaultdict
+from functools import cached_property
 from html import unescape
 from typing import TYPE_CHECKING
 
 from poetry.core.packages.utils.link import Link
 
 from poetry.repositories.link_sources.base import LinkSource
-from poetry.utils._compat import cached_property
 
 
 if TYPE_CHECKING:

src/poetry/repositories/link_sources/html.py

@@ -1,13 +1,13 @@
 from __future__ import annotations
 
 from collections import defaultdict
+from functools import cached_property
 from typing import TYPE_CHECKING
 from typing import Any
 
 from poetry.core.packages.utils.link import Link
 
 from poetry.repositories.link_sources.base import LinkSource
-from poetry.utils._compat import cached_property
 
 
 if TYPE_CHECKING: