build: Add all necessary files for the build system

All basic files for testing, building and distributing the project
are added here. The Makefile can set up the virtual environment and
create different package types from the project.

Makefile

@@ -0,0 +1,119 @@
+SHELL        := bash
+MAKEFLAGS     = --no-print-directory --no-builtin-rules
+.DEFAULT_GOAL = all
+
+# Variables
+PACKAGE       = revpi_middleware
+APP_NAME      = RevPiMiddleware
+APP_IDENT     = com.revolutionpi.revpi-middleware
+
+# Python interpreter to use for venv creation
+SYSTEM_PYTHON = python3
+
+# Set path to create the virtual environment with package name
+ifdef PYTHON3_VENV
+VENV_PATH = $(PYTHON3_VENV)/$(PACKAGE)
+else
+VENV_PATH = venv
+endif
+
+# Set targets for "all"-target
+all: test build
+.PHONY: all
+
+## Virtual environment creation with SYSTEM_PYTHON
+venv:
+	# Start with empty environment
+	"$(SYSTEM_PYTHON)" -m venv "$(VENV_PATH)"
+	"$(VENV_PATH)/bin/pip" install --upgrade pip
+	"$(VENV_PATH)/bin/pip" install --upgrade -r requirements.txt
+
+venv-ssp:
+	# Include system installed site-packages and add just missing modules
+	"$(SYSTEM_PYTHON)" -m venv --system-site-packages "$(VENV_PATH)"
+	"$(VENV_PATH)/bin/pip" install --upgrade pip
+	"$(VENV_PATH)/bin/pip" install --upgrade -r requirements.txt
+
+.PHONY: venv venv-ssp
+
+# Choose python interpreter from venv or system
+PYTHON = $(or $(wildcard $(VENV_PATH)/bin/python), $(SYSTEM_PYTHON))
+
+# Read app version from program
+APP_VERSION = $(shell "$(PYTHON)" src/$(PACKAGE) --version | cut -d ' ' -f 2)
+
+# Environment info
+venv-info:
+	@echo Environment for $(APP_NAME) $(APP_VERSION)
+	@echo Using path: "$(VENV_PATH)"
+
+.PHONY: venv-info
+
+## Build steps
+test:
+	PYTHONPATH=src "$(PYTHON)" -m pytest
+
+build:
+	"$(PYTHON)" -m setup sdist
+	"$(PYTHON)" -m setup bdist_wheel
+
+install: build
+	"$(PYTHON)" -m pip install dist/$(PACKAGE)-$(APP_VERSION)-*.whl
+
+uninstall:
+	"$(PYTHON)" -m pip uninstall --yes $(PACKAGE)
+
+.PHONY: test build install uninstall
+
+## PyInstaller
+app-licenses:
+	mkdir -p dist
+	# Create a list of all installed libraries, their versions and licenses
+	"$(PYTHON)" -m piplicenses \
+		--format=markdown \
+		--output-file dist/bundled-libraries.md
+	# Create a list of installed libraries with complete project information
+	"$(PYTHON)" -m piplicenses \
+		--with-authors \
+		--with-urls \
+		--with-description \
+		--with-license-file \
+		--no-license-path \
+		--format=json \
+		--output-file dist/open-source-licenses.json
+	"$(PYTHON)" -m piplicenses \
+		--with-authors \
+		--with-urls \
+		--with-description \
+		--with-license-file \
+		--no-license-path \
+		--format=plain-vertical \
+		--output-file dist/open-source-licenses.txt
+
+app: app-licenses
+	"$(PYTHON)" -m PyInstaller -n $(APP_NAME) \
+		--add-data="dist/bundled-libraries.md:$(PACKAGE)/open-source-licenses" \
+		--add-data="dist/open-source-licenses.*:$(PACKAGE)/open-source-licenses" \
+		--noconfirm \
+		--clean \
+		--onefile \
+		src/$(PACKAGE)/__main__.py
+
+.PHONY: app-licenses app
+
+## Clean
+clean:
+	# PyTest caches
+	rm -rf .pytest_cache
+	# Build artifacts
+	rm -rf build dist src/*.egg-info
+	# PyInstaller created files
+	rm -rf *.spec
+	# Pycaches
+	find . -type d -name '__pycache__' -exec rm -r {} \+
+
+distclean: clean
+	# Virtual environment
+	rm -rf "$(VENV_PATH)"
+
+.PHONY: clean distclean