Small updates to build and docs.

.coveragerc

@@ -1,7 +1,7 @@
 [run]
 omit =
     devserver.py
-    .venv/**
+    venv/**
     */tests/**
     */lib/**
 

.gitignore

@@ -2,7 +2,7 @@
 .idea/
 *.iml
 *.zip
-.venv
+venv
 .env
 .env.dev
 lib

Makefile

@@ -1,22 +1,22 @@
-.PHONY: all env virtualenv install nopyc clean test run-devserver
+.PHONY: all env install nopyc clean test run-devserver
 
 SHELL := /usr/bin/env bash
+PYTHON_BIN ?= python
+PROJECT_VENV ?= venv
 
-all: env virtualenv install
+all: test
 
 env:
 	cp -n .env.example .env | true
 	cp -n .env.dev.example .env.dev | true
 
-virtualenv:
-	@if [ ! -d ".venv" ]; then \
-		python3 -m pip install virtualenv --user; \
-		python3 -m virtualenv .venv; \
-	fi
+venv:
+	python -m pip install virtualenv --user
+	python -m virtualenv $(PROJECT_VENV)
 
-install: env virtualenv
+install: env venv
 	@( \
-		source .venv/bin/activate; \
+		source $(PROJECT_VENV)/bin/activate; \
 		python -m pip install -r requirements.txt -t ./lib; \
 		python -m pip install -r requirements.txt -r requirements-dev.txt; \
 	)
@@ -26,16 +26,16 @@ nopyc:
 	find . -name __pycache__ | xargs rm -rf || true
 
 clean: nopyc
-	rm -rf build .venv
+	rm -rf build $(PROJECT_VENV)
 
 test: install
 	@( \
-		source .venv/bin/activate; \
+		source $(PROJECT_VENV)/bin/activate; \
 		coverage run -m unittest discover -v -b && coverage report && coverage xml && coverage html; \
 	)
 
 run-devserver: install
 	@( \
-		source .venv/bin/activate; \
+		source $(PROJECT_VENV)/bin/activate; \
 		FLASK_SKIP_DOTENV=1 FLASK_ENV=development FLASK_APP=devserver.py flask run; \
 	)