# Pastebin oPwDE5pt
# There must be an apt-cacher-ng installation on the host.
proxy_url=http://$(shell ip -br address show dev eth0 | awk '{print $$3}' | cut -d / -f 1):3142

# Packages that are not required for building snapd but are useful for interactive development.
packages=git sbuild mc devscripts avahi-daemon ssh vim-nox rsync

# Helpful function for running a command on the remote machine.
# Assumes that the target name ends with machine name, like below.
remote=multipass exec $* --

PHONY: help
help:
	@echo "Availale targets"
	@echo "  create-NAME: create a multipass virtual machine"
	@echo "  prepare-NAME: prepare a virtual machine for building packages"
	@echo "  destroy-NAME: destroy a multipass virtual machine"
	@echo "  build-on-NAME: copy a source package and build it on a virtual machine"
	@echo
	@echo "Available names are: debian-9 debian-10"
	@echo "NOTE: You must provide the source package yourself"

.PHONY: create-debian-9
create-debian-9:
	multipass launch -n debian-9 -c 8 -m 4G https://cdimage.debian.org/mirror/cdimage/openstack/current/debian-9.6.4-20190118-openstack-amd64.qcow2

.PHONY: create-debian-10
create-debian-10:
	multipass launch -n debian-10 -c 8 -m 4G https://cdimage.debian.org/mirror/cdimage/openstack/testing/debian-testing-openstack-amd64.qcow2

.PHONY: prepare-debian-9 prepare-debian-10
prepare-debian-9 prepare-debian-10: prepare-%:
	$(remote) sudo mkdir -p /etc/apt/apt.conf.d/
	$(remote) sudo sh -c 'echo "Acquire::HTTP::Proxy \"$(proxy_url)\";" > /etc/apt/apt.conf.d/00proxy'
	-$(remote) sudo apt-get update
	$(remote) sudo apt-get dist-upgrade -y
	$(remote) sudo apt-get install -y $(packages)
	$(remote) sudo apt-get autoremove -y
	$(remote) sudo sbuild-adduser $(shell $(remote) whoami)
	$(remote) cp /usr/share/doc/sbuild/examples/example.sbuildrc /home/multipass/.sbuildrc
	#$(remote) sudo rm -f /etc/schroot/chroot.d/sid-amd64-sbuild-*
	#$(remote) sudo rm -rf /srv/chroot/sid-amd64-sbuild
	# NOTE: the chroot is always for sid, this is mainly to test the impact of the kernel.
	$(remote) sudo sbuild-createchroot --include=eatmydata,ccache,gnupg sid /srv/chroot/sid-amd64-sbuild $(proxy_url)/debian

.PHONY: destroy-debian-9 destroy-debian-10
destroy-debian-9 destroy-debian-10: destroy-debian-%:
	multipass delete $*
	multipass purge

build-on-debian-9 build-on-debian-10: build-on-%:
	multipass copy-files snapd_*.debian.tar.xz snapd_*.dsc snapd_*.orig.tar.xz snapd-*.tar.gz $*:/home/multipass/
	$(remote) sbuild -d sid snapd_$(shell ls *.dsc | sort -r -n | head -n 1).dsc