Drop Python versions that are unsupported by core team

.coveragerc

@@ -10,6 +10,8 @@ source =
    .tox/pypy*/site-packages/
 
 [report]
+show_missing = true
+skip_covered = true
 omit =
    src/towncrier/__main__.py
    src/towncrier/test/*

.github/workflows/ci.yml

@@ -64,15 +64,9 @@ jobs:
             runs-on: ubuntu-latest
           - name: macOS
             runs-on: macos-latest
-          - name: Windows
+          - name: Win
             runs-on: windows-latest
         python:
-          - name: CPython 2.7
-            tox: py27
-            action: 2.7
-          - name: CPython 3.5
-            tox: py35
-            action: 3.5
           - name: CPython 3.7
             tox: py37
             action: 3.7
@@ -85,9 +79,6 @@ jobs:
           - name: CPython 3.10
             tox: py310
             action: '3.10'
-          - name: PyPy 2.7
-            tox: pypy27
-            action: pypy-2.7
           - name: PyPy 3.7
             tox: pypy37
             action: pypy-3.7

README.rst

@@ -36,9 +36,9 @@ Install from PyPI::
 
 .. note::
 
-   ``towncrier``, as a command line tool, works on Python 2.7 and 3.5+ only.
+   ``towncrier``, as a command line tool, works on Python 3.7+ only.
    It is usable by projects written in other languages, provided you specify the project version either in the configuration file or on the command line.
-   For Python 2/3 compatible projects, the version can be discovered automatically.
+   For Python-compatible projects, the version can be discovered automatically.
 
 In your project root, add a ``towncrier.toml`` or a ``pyproject.toml`` file (if both files exist, the first will take precedence).
 You can configure your project in two ways.
@@ -75,7 +75,7 @@ Using the above example, your news fragments would be ``src/myproject/newsfragme
 
 ``towncrier`` needs to know what version your project is, and there are three ways you can give it:
 
-- For Python 2/3 compatible projects, a ``__version__`` in the top level package.
+- For Python-compatible projects, a ``__version__`` in the top level package.
   This can be either a string literal, a tuple, or an `Incremental <https://github.com/hawkowl/incremental>`_ version.
 
 - Manually passing ``--version=<myversionhere>`` when interacting with ``towncrier``.

pyproject.toml

@@ -34,7 +34,7 @@
 
 
 [tool.black]
-target-version = ['py27']
+target-version = ['py37']
 exclude = '''
 
 (

setup.py

@@ -29,26 +29,23 @@
         "Operating System :: POSIX :: Linux",
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: Microsoft :: Windows",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
     ],
     use_incremental=True,
+    python_requires=">=3.7",
     install_requires=[
         "click",
         "click-default-group",
         "incremental",
         "jinja2",
         "setuptools",
-        "toml; python_version < '3.6'",
-        "tomli; python_version >= '3.6'",
+        "tomli",
     ],
     extras_require={"dev": ["packaging"]},
     package_dir={"": "src"},

src/towncrier/_builder.py

@@ -4,7 +4,6 @@
 from __future__ import absolute_import, division, print_function
 
 import os
-import sys
 import textwrap
 import traceback
 
@@ -90,14 +89,9 @@ def find_fragments(base_directory, sections, fragment_directory, definitions):
         else:
             section_dir = os.path.join(base_directory, val)
 
-        if sys.version_info >= (3,):
-            expected_exception = FileNotFoundError
-        else:
-            expected_exception = OSError
-
         try:
             files = os.listdir(section_dir)
-        except expected_exception as e:
+        except FileNotFoundError as e:
             message = "Failed to list the news fragment files.\n{}".format(
                 ''.join(traceback.format_exception_only(type(e), e)),
             )

src/towncrier/_settings/load.py

@@ -3,14 +3,9 @@
 
 import io
 import os
-import sys
 import pkg_resources
 
-if sys.version_info >= (3, 6):
-    import tomli
-else:
-    tomli = None
-    import toml
+import tomli
 
 from collections import OrderedDict
 from .._settings import fragment_types as ft
@@ -67,12 +62,8 @@ def load_config(directory):
 
 
 def load_config_from_file(directory, config_file):
-    if tomli:
-        with io.open(config_file, "rb") as conffile:
-            config = tomli.load(conffile)
-    else:
-        with io.open(config_file, "r", encoding="utf8", newline="") as conffile:
-            config = toml.load(conffile)
+    with io.open(config_file, "rb") as conffile:
+        config = tomli.load(conffile)
 
     return parse_toml(directory, config)
 

src/towncrier/check.py

@@ -34,9 +34,7 @@ def __main(comparewith, directory, config):
     # Use UTF-8 both when sys.stdout does not have .encoding (Python 2.7) and
     # when the attribute is present but set to None (explicitly piped output
     # and also some CI such as GitHub Actions).
-    encoding = getattr(sys.stdout, "encoding", None)
-    if encoding is None:
-        encoding = "utf8"
+    encoding = getattr(sys.stdout, "encoding", "utf8")
 
     try:
         files_changed = (

src/towncrier/newsfragments/378.removal.rst

@@ -0,0 +1 @@
+Support for all Python versions older than 3.7 has been dropped.

src/towncrier/test/test_project.py

@@ -43,12 +43,7 @@ def test_import_fails(self):
         """
         An exception is raised when getting the version failed due to missing Python package files.
         """
-        if sys.version_info >= (3, 6):
-            expected_exception = ModuleNotFoundError
-        else:
-            expected_exception = ImportError
-
-        with self.assertRaises(expected_exception):
+        with self.assertRaises(ModuleNotFoundError):
             get_version(".", "projectname_without_any_files")
 
     def test_already_installed_import(self):

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = cov-erase, flake8, {pypy27,pypy37,pypy38,py27,py35,py36,py37,py38,py39,py310}-{tests,flake8,check-manifest,check-newsfragment}, cov-report
+envlist = cov-erase, flake8, {pypy37,pypy38,py37,py38,py39,py310}-tests, flake8, check-manifest, check-newsfragment, cov-report
 isolated_build=true
 skip_missing_envs = true
 
@@ -14,6 +14,11 @@ commands =
 commands =
    python -m towncrier.check
 
+[testenv:check-manifest]
+deps = check-manifest
+skip_install = true
+commands = check-manifest
+
 [testenv]
 deps =
    Twisted