Introduce idempotent Makefile to run basic.sh in docker

.gitignore

@@ -2,3 +2,4 @@
 BaseSystem.img
 BaseSystem.dmg
 BaseSystem.chunklist
+MyDisk.qcow2

Makefile

@@ -0,0 +1,80 @@
+SELF := $(patsubst %/,%,$(dir $(abspath $(firstword $(MAKEFILE_LIST)))))
+
+# Make sure fully-featured BASH shell is used by this Makefile
+SHELL := $(shell which bash)
+
+IMAGE := macos-simple-kvm
+
+DISK_NAME ?= MyDisk
+DISK_SIZE ?= 64G
+
+# Embed helper Dockerfile here for simplicity
+define DOCKERFILE
+FROM ubuntu:rolling
+
+ENV LC_ALL=C.UTF-8 LANG=C.UTF-8
+
+RUN export DEBIAN_FRONTEND=noninteractive \
+ && apt-get -q update -y \
+ && apt-get -q install -y \
+    qemu-system \
+    qemu-utils \
+    python3 \
+    python3-pip \
+ && apt-get -q autoremove -y \
+ && apt-get -q clean -y \
+ && rm -rf /var/lib/apt/lists/*
+
+WORKDIR $(SELF)/
+
+ENTRYPOINT []
+CMD /bin/bash
+endef
+
+# Define helper docker-run macro to simplify rest of the Makefile
+define RUN
+docker run --rm \
+    --network="host" \
+    --privileged="true" \
+    --device="/dev/dri/" \
+    -e DISPLAY="$$DISPLAY" \
+    -v $(SELF)/:$(SELF)/ \
+    -i $(IMAGE)
+endef
+
+# Append audio and hard disk device configuration
+define BASIC_SH
+$(file < $(SELF)/basic.sh)
+-audiodev driver=pa,id=sound1,server=localhost \
+-drive id=SystemDisk,if=none,file=MyDisk.qcow2 \
+-device ide-hd,bus=sata.4,drive=SystemDisk
+endef
+
+export
+
+.PHONY: all
+
+all: basic
+
+.PHONY: build
+
+build:
+	docker build -t $(IMAGE) - <<< "$$DOCKERFILE"
+
+.PHONY: jumpstart
+
+jumpstart-%: build
+	[[ -f $(SELF)/BaseSystem.img ]] || $(call RUN) ./jumpstart.sh --$*
+
+jumpstart: jumpstart-catalina
+
+.PHONY: basic
+
+basic: build $(SELF)/BaseSystem.img $(SELF)/MyDisk.qcow2
+	$(call RUN) bash -s <<< "$$BASIC_SH"
+
+$(SELF)/BaseSystem.img:
+	@echo "Please run one of the 'jumpstart' variants first!" && exit 1
+
+$(SELF)/$(DISK_NAME).qcow2:
+	$(call RUN) qemu-img create -f qcow2 $@ $(DISK_SIZE)