Add support for Python 3.7

.cookiecutter/cookiecutter.json

@@ -7,7 +7,7 @@
     "package_name": "pip_sync_faster",
     "slug": "pip-sync-faster",
     "short_description": "A wrapper that makes pip-sync faster.",
-    "python_versions": "3.10.4, 3.9.12, 3.8.13",
+    "python_versions": "3.10.4, 3.9.12, 3.8.13, 3.7.13",
     "github_owner": "hypothesis",
     "copyright_holder": "Hypothesis",
     "public": "yes",

.cookiecutter/includes/setuptools/install_requires

@@ -1 +1,2 @@
 pip-tools
+importlib_metadata;python_version<"3.8."

.github/workflows/ci.yml

@@ -29,7 +29,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.10', '3.9', '3.8']
+        python-version: ['3.10', '3.9', '3.8', '3.7']
     name: Unit tests with Python ${{ matrix.python-version }}
     steps:
       - uses: actions/checkout@v3
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.10', '3.9', '3.8']
+        python-version: ['3.10', '3.9', '3.8', '3.7']
     name: Functional tests with Python ${{ matrix.python-version }}
     steps:
       - uses: actions/checkout@v3

.python-version

@@ -1,3 +1,4 @@
 3.10.4
 3.9.12
 3.8.13
+3.7.13

Makefile

@@ -46,6 +46,12 @@ coverage: test-py38
 test-py38: python
 	@pyenv exec tox -qe py38-tests
 
+.PHONY: test-py37
+$(call help,make test-py37,"run the unit tests in Python 3.7")
+coverage: test-py37
+test-py37: python
+	@pyenv exec tox -qe py37-tests
+
 .PHONY: coverage
 $(call help,make coverage,"run the tests and print the coverage report")
 coverage: python
@@ -66,11 +72,16 @@ $(call help,make functests-py38,"run the functional tests in Python 3.8")
 functests-py38: python
 	@pyenv exec tox -qe py38-functests
 
+.PHONY: functests-py37
+$(call help,make functests-py37,"run the functional tests in Python 3.7")
+functests-py37: python
+	@pyenv exec tox -qe py37-functests
+
 .PHONY: sure
 $(call help,make sure,"make sure that the formatting$(comma) linting and tests all pass")
 sure: python
 sure:
-	@pyenv exec tox --parallel -qe 'checkformatting,lint,tests,py{39,38}-tests,coverage,functests,py{39,38}-functests'
+	@pyenv exec tox --parallel -qe 'checkformatting,lint,tests,py{39,38,37}-tests,coverage,functests,py{39,38,37}-functests'
 
 .PHONY: template
 $(call help,make template,"update from the latest cookiecutter template")

README.md

@@ -1,6 +1,6 @@
 <a href="https://github.com/hypothesis/pip-sync-faster/actions/workflows/ci.yml?query=branch%3Amain"><img src="https://img.shields.io/github/workflow/status/hypothesis/pip-sync-faster/CI/main"></a>
 <a href="https://pypi.org/project/pip-sync-faster"><img src="https://img.shields.io/pypi/v/pip-sync-faster"></a>
-<a><img src="https://img.shields.io/badge/python-3.10 | 3.9 | 3.8-success"></a>
+<a><img src="https://img.shields.io/badge/python-3.10 | 3.9 | 3.8 | 3.7-success"></a>
 <a href="https://github.com/hypothesis/pip-sync-faster/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-BSD--2--Clause-success"></a>
 <a href="https://github.com/hypothesis/cookiecutters/tree/main/pypackage"><img src="https://img.shields.io/badge/cookiecutter-pypackage-success"></a>
 <a href="https://black.readthedocs.io/en/stable/"><img src="https://img.shields.io/badge/code%20style-black-000000"></a>

bin/make_python

@@ -8,7 +8,7 @@ if [ -n "${CI+x}" ]; then exit; fi
 
 pyenv_root=$(pyenv root)
 
-for python_version in 3.10.4 3.9.12 3.8.13; do
+for python_version in 3.10.4 3.9.12 3.8.13 3.7.13; do
     bin_dir=$pyenv_root/versions/$python_version/bin
     if [ ! -f "$bin_dir"/tox ]; then
         pyenv install --skip-existing "$python_version"

setup.cfg

@@ -16,9 +16,10 @@ classifiers =
 package_dir =
     = src
 packages = find:
-python_requires = >=3.8
+python_requires = >=3.7
 install_requires =
     pip-tools
+    importlib_metadata;python_version<"3.8."
 
 [options.packages.find]
 where = src

src/pip_sync_faster/cli.py

@@ -1,9 +1,13 @@
 from argparse import ArgumentParser
-from importlib.metadata import version
 from subprocess import CalledProcessError
 
 from pip_sync_faster.sync import sync
 
+try:
+    from importlib.metadata import version
+except ModuleNotFoundError:
+    from importlib_metadata import version
+
 
 def cli(_argv=None):  # pylint:disable=inconsistent-return-statements
     parser = ArgumentParser(

tests/unit/pip_sync_faster/cli_test.py

@@ -1,10 +1,14 @@
-from importlib.metadata import version
 from subprocess import CalledProcessError
 
 import pytest
 
 from pip_sync_faster.cli import cli
 
+try:
+    from importlib.metadata import version
+except ModuleNotFoundError:
+    from importlib_metadata import version
+
 
 def test_cli(sync):
     exit_code = cli(["requirements/dev.txt", "--foo", "bar"])

tox.ini

@@ -32,7 +32,7 @@ deps =
     lint,tests,functests: h-matchers
     lint,template: cookiecutter
 depends =
-    coverage: tests,py{39,38}-tests
+    coverage: tests,py{39,38,37}-tests
 commands =
     dev: {posargs:ipython --classic --no-banner --no-confirm-exit}
     format: black src tests bin