# Root file system for test environment.
#
# Copyright (c) 2021  Jacques de Laval <jacques@de-laval.se>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
#     all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

DEST		?= ../tenv-root
srcdir		?= ../

ARCH		?= x86_64

FINITBIN   ?= ./sbin/finit

BBVER ?= 1.31.0
BBBIN  = busybox-$(ARCH)
BBURL ?= https://www.busybox.net/downloads/binaries/$(BBVER)-defconfig-multiarch-musl/$(BBBIN)

binaries = $(DEST)/bin/cat \
	$(DEST)/bin/cp \
	$(DEST)/bin/date \
	$(DEST)/bin/echo \
	$(DEST)/bin/env \
	$(DEST)/bin/find \
	$(DEST)/bin/kill \
	$(DEST)/bin/ls \
	$(DEST)/bin/mkdir \
	$(DEST)/bin/mkfifo \
	$(DEST)/bin/mknod \
	$(DEST)/bin/mount \
	$(DEST)/bin/printf \
	$(DEST)/bin/pgrep \
	$(DEST)/bin/ps \
	$(DEST)/bin/rm \
	$(DEST)/bin/sh \
	$(DEST)/bin/sleep \
	$(DEST)/bin/top \
	$(DEST)/bin/touch

dirs = $(DEST)/bin \
	$(DEST)/dev \
	$(DEST)/etc \
	$(DEST)/proc \
	$(DEST)/sbin \
	$(DEST)/sys \
	$(DEST)/test_assets \
	$(DEST)/tmp

_libs_src = $(shell ldd $(FINITBIN) | grep -Eo '/[^ ]+')
libs = $(foreach path,$(_libs_src),$(abspath $(DEST))$(path))

all: $(dirs) $(binaries) $(libs) $(DEST)/bin/chrootsetup.sh

$(dirs):
	mkdir -p $@

$(DEST)/bin/$(BBBIN).md5:
	cp $(srcdir)/tenv/$(notdir $@) $@

$(DEST)/bin/$(BBBIN): $(DEST)/bin/$(BBBIN).md5
	wget -O $@ $(BBURL)
	chmod +x $@
	cd $(dir $@); \
	  md5sum -c $(BBBIN).md5

$(DEST)/bin/chrootsetup.sh:
	cp $(srcdir)/tenv/$(notdir $@) $@

$(binaries): $(DEST)/bin/$(BBBIN)
	cd $(DEST)/bin; \
	  rm -f $(notdir $@); \
	  ln -s $(BBBIN) $(notdir $@)

$(libs):
	mkdir -p $(dir $@)
	cp $(patsubst $(abspath $(DEST))%,%,$@) $@