use local .venv, manage venv via makefile

.flake8

@@ -1,2 +1,3 @@
 [flake8]
 ignore = E501, W503
+exclude = .venv

.github/workflows/test.yml

@@ -29,7 +29,7 @@ jobs:
         run: make lint
 
       - name: Ensure package builds
-        run: flit build
+        run: make build
 
       - name: Upload coverage report to codecov
         uses: codecov/codecov-action@v3

.gitignore

@@ -10,3 +10,6 @@ pip_abandoned.egg-info/
 # test coverage
 .coverage
 coverage.xml
+
+# venv
+.venv

CONTRIBUTING.md

@@ -13,3 +13,8 @@ Development Tasks:
 * Run the test suite: `make test`
 * Run lint checks: `make lint`
 * Auto-format: `make format`
+
+Virtual Env Management:
+
+* `source .venv/bin/activate`
+* `deactivate`

Makefile

@@ -1,28 +1,41 @@
 SHELL := /bin/bash
-.PHONY: help format install lint test release
+.PHONY: build help format install lint test release venv
 
 help:
 	@grep '^\.PHONY' Makefile | cut -d' ' -f2- | tr ' ' '\n'
 
+venv:
+	python3 -m venv .venv
+
 format:
-	isort --profile black .
+	source .venv/bin/activate && \
+	isort --profile black . && \
 	black .
 
 install:
+	python3 -m venv .venv
+	source .venv/bin/activate && \
 	pip install -e .[dev]
 
 lint:
-	isort --profile black -c --diff .
-	black --check .
+	source .venv/bin/activate && \
+	isort --profile black -c --diff . && \
+	black --check . && \
 	flake8 .
 
 test:
+	source .venv/bin/activate && \
 	pytest --cov=pip_abandoned --cov-report term --cov-report xml ./tests
 
+build:
+	source .venv/bin/activate && \
+	flit build
+
 release:
 	# usage: `make release version=0.0.0`
 	make test
 	@echo ""
 	make lint
 	@echo ""
+	source .venv/bin/activate && \
 	./release.sh "$(version)"