SHELL = /bin/sh
.SUFFIXES:

INSTALL = /usr/bin/install

MNAME := octoprint
MACHINES_DIR := /var/lib/machines
MDIR := $(MACHINES_DIR)/$(MNAME)
TDIR := $(MACHINES_DIR)/$(MNAME)-template
DEVPTN := '/dev/ttyUSB*'

OP = systemd-nspawn --machine=$(MNAME) --hostname=$(MNAME) --directory="$(MDIR)" --tmpfs=/run --tmpfs=/run/lock

all:
	@echo Nothing to do.
	@echo run 'sudo make install'
.PHONY: all

/usr/bin/systemd-nspawn:
	apt install -y systemd-container

/etc/cron-apt/action.d /usr/sbin/cron-apt:
	apt install -y cron-apt

/etc/cron-apt/action.d/6-upgrade: /etc/cron-apt/action.d

/etc/cron-apt/action.d/6-upgrade $(MDIR)/etc/cron-apt/action.d/6-upgrade: src/cron-apt-6-upgrade
	$(INSTALL) -o root -g root -m 644 $< $@

/usr/sbin/debootstrap:
	apt install -y debootstrap
	touch "$@"

/etc/systemd/system/octoprint-container@.service: src/octoprint-container@.service
	$(INSTALL) -o root -g root -m 0644 $< $@
/etc/systemd/system/multi-user.target.wants/octoprint-container@.service: /etc/systemd/system/octoprint-container@.service
	ln -fs $< $@

$(MDIR): /usr/sbin/debootstrap
	rm -rf "$@".tmp
	debootstrap --include=systemd-container stable "$@".tmp
	touch "$@".tmp
	mv "$@".tmp "$@"

$(MDIR)/usr/bin/pip3: $(MDIR)
	$(OP) apt install -y python3-pip
	touch "$@"
$(MDIR)/usr/bin/ffmpeg: $(MDIR)
	$(OP) apt install -y ffmpeg
	touch "$@"
$(MDIR)/usr/sbin/cron-apt: $(MDIR)
	$(OP) apt install -y cron-apt
	touch "$@"
$(MDIR)/usr/bin/nullmailer-send: $(MDIR)
	$(OP) apt install -y nullmailer
	touch "$@"
$(MDIR)/usr/local/bin/octoprint: $(MDIR)/usr/bin/pip3
	$(OP) pip3 install octoprint
	touch "$@"

install_octoprint: $(MDIR) /usr/bin/systemd-nspawn $(addprefix $(MDIR),/usr/bin/pip3 /usr/bin/ffmpeg /usr/local/bin/octoprint)
	$(OP) sh -c 'getent passwd octoprint >/dev/null || useradd -mrUd /var/lib/octoprint -G dialout octoprint'
.PHONY: install_octoprint

$(MDIR)/usr/local/libexec/octoprint-init: src/octoprint-init $(MDIR)/usr/local/libexec
	$(INSTALL) -o root -g root -m 0755 $< $@
$(MDIR)/etc/systemd/system/octoprint-init.service: src/octoprint-init.service $(MDIR)
	$(INSTALL) -o root -g root -m 0755 $< $@
$(MDIR)/etc/systemd/system/multi-user.target.wants/octoprint-init.service: $(MDIR)/etc/systemd/system/octoprint-init.service
	ln -fs $< $@

$(MDIR)/etc/systemd/system/octoprint.service: src/octoprint.service
	$(INSTALL) -o root -g root -m 0644 $< $@

TDIR_DIRS = $(addprefix $(TDIR),/dev /media /opt /etc /mnt /usr /usr/lib \
	/local /home /srv /run /boot /tmp /root /var /var/backups /var/opt \
	/var/lib /var/local /var/spool /var/spool/cron /var/spool/rsyslog \
	/var/spool/mail /var/log /var/cache /var/tmp /var/mail /proc /sys)

$(TDIR_DIRS): $(dir $@)
	$(INSTALL) -o root -g root -m 0755 -d $@
$(MDIR)/usr/local/libexec:
	$(INSTALL) -o root -g root -m 0755 -d $@
$(TDIR):
	$(INSTALL) -o root -g root -m 0755 -d $@

##### install*: #####

install_system: /usr/bin/systemd-nspawn /usr/sbin/cron-apt /etc/cron-apt/action.d/6-upgrade
.PHONY: install_system
install_container: install_octoprint \
	/etc/systemd/system/octoprint-container@.service \
	$(MDIR)/usr/local/libexec/octoprint-init \
	$(MDIR)/etc/systemd/system/octoprint-init.service \
	$(MDIR)/etc/systemd/system/multi-user.target.wants/octoprint-init.service \
	$(MDIR)/etc/systemd/system/octoprint.service \
	$(MDIR)/etc/cron-apt/action.d/6-upgrade
.PHONY: install_container
install_template: $(TDIR_DIRS)
.PHONY: install_template
install: install_system install_container install_template
	systemctl daemon-reload
.PHONY: install