#!/usr/bin/make
#
# Make a schooltool livecd
#

# Bandwidth in kbps (I can't go any faster - jinty)
upkbps=5
downkbps=10

# Options to put the created cd-image somewhere
uploadhost=ftp.schooltool.org
uploadtestdir=/home/jinty/live-cd
uploaddir=/home/ftp/pub/schooltool/live-cd
rsyncopts=-zvPr --include=$(targetfile) --exclude='*.iso' --exclude='MD5SUMS' --bwlimit $(upkbps)

# where to put stuff on the filesystem
targetdir=$(release)/$(subrelease)
targetfile=schooltool-$(iniso)
target=$(targetdir)/$(targetfile)

# Options to get the cd
release=hoary
subrelease=array-7
iniso=$(release)-live-i386.iso
source=http://cdimage.ubuntu.com/releases/$(release)/$(subrelease)

# Apt sources to use fro downloading packages
aptsources="deb ftp://archive.ubuntu.com/ubuntu breezy main universe" "\#deb ftp://archive.schooltool.org/ubuntu breezy main universe"

# Run control
cloop=filesystem.cloop
cloopiniso=/casper/$(cloop)
rootcmd=sudo
nice=nice -20
# this leaves temp dirs lying around, ya well no fine
export MOUNTDIR?=$(shell mktemp -d)
chrootcmd=$(rootcmd) chroot $(MOUNTDIR)

export LANG=

.PHONY: all
all: $(target)


$(targetdir)/MD5SUMS:
	mkdir -p $(targetdir)
	cd $(targetdir) && wget -c --limit-rate=$(downbps)k $(source)/MD5SUMS


$(targetdir)/$(iniso): $(targetdir)/MD5SUMS
	-mkdir get
	cd get && wget -c --limit-rate=10k $(source)/$(iniso)

	# Check MD5 sum
	theremd5=`cat $(targetdir)/MD5SUMS | grep $(iniso)`\
		  && cd get\
		  && heremd5=`md5sum $(iniso)`\
		  && echo "theremd5: $$theremd5"\
		  && echo "heremd5:  $$heremd5"\
		  && [ "$$theremd5" == "$$heremd5" ]
	mv get/$(iniso) $(targetdir)
	touch $(targetdir)/$(iniso)

.PHONY: mount
mount:
	$(rootcmd) mount $(MOUNTED) $(MOUNTDIR) -o loop


.PHONY: umount
umount:
	$(rootcmd) umount $(MOUNTDIR)


.PHONY: inmount
inmount:
	$(rootcmd) mount $(MOUNTED) $(MOUNTDIR) -o loop
	$(MAKE) $(INMOUNT)
	$(rootcmd) umount $(MOUNTDIR)


.PHONY: extractcd
extractcd:
	-$(rootcmd) rm -rf extracted_cd
	mkdir extracted_cd
	$(nice) $(rootcmd) tar -c --exclude=$(cloop) -C $(MOUNTDIR) . | \
	    $(nice) $(rootcmd) tar --strip-path=1 -x -C extracted_cd


extracted_cd: $(targetdir)/$(iniso)
	$(MAKE) INMOUNT=extractcd MOUNTED=$< inmount


.PHONY: extractfs
extractfs:
	$(nice) extract_compressed_fs $(MOUNTDIR)/$(cloopiniso) > extracted_fs 2>/dev/null


extracted_fs: $(targetdir)/$(iniso)
	$(MAKE) INMOUNT=extractfs MOUNTED=$< inmount


.PHONY: extractsources
extractsources:
	cp $(MOUNTDIR)/etc/apt/sources.list sources.list.orig


sources.list.orig: extracted_fs
	$(MAKE) INMOUNT=extractsources MOUNTED=$< inmount


.PHONY: customizefs
customizefs:
	### Setup
	$(rootcmd) mount -t proc proc $(MOUNTDIR)/proc
	set -e; for i in $(aptsources); do \
		echo $$i; \
	    done | $(rootcmd) tee $(MOUNTDIR)/etc/apt/sources.list >/dev/null
	$(chrootcmd) apt-get update

	### Customize
	set -e; for i in `cat packages_remove |tr "\n" " "`;do\
	    $(chrootcmd) apt-get -y remove$$i;\
	done
	cat preseed | $(chrootcmd) debconf-set-selections
	cd files && $(rootcmd) find . -name '.svn' -prune -o -not -type d \
	    -exec install -D -p {} $(MOUNTDIR)/{} \;
	set -e; for i in `cat packages_add| tr "\n" " "`;do\
	    $(chrootcmd) apt-get -y --allow-unauthenticated install $$i;\
	done
	cat postscript | $(chrootcmd) bash
	$(chrootcmd) dpkg-query -W --showformat='${Package} ${Version}\n' \
	    | sudo tee extracted_cd/casper/filesystem.manifest > /dev/null
	$(rootcmd) cp isolinux.txt extracted_cd/isolinux/isolinux.txt

	### Cleanup
	$(rootcmd) apt-get clean
	$(rootcmd) cp sources.list.orig $(MOUNTDIR)/etc/apt/sources.list
	$(rootcmd) umount $(MOUNTDIR)/proc


customized_fs: extracted_fs sources.list.orig extracted_cd
	-rm $@
	cp $< $@.tmp
	$(MAKE) INMOUNT=customizefs MOUNTED=$@.tmp inmount
	mv $@.tmp $@


extracted_cd/$(cloopiniso): customized_fs extracted_cd
	-$(rootcmd) rm -f $@
	create_compressed_fs customized_fs 65536 > cloop.tmp 2>/dev/null
	$(rootcmd) mv cloop.tmp $@

$(target): extracted_cd extracted_cd/$(cloopiniso)
	-mkdir -p $(targetdir)
	cd extracted_cd && $(rootcmd) mkisofs -r -V "SchoolTool / SchoolBell LiveCD" \
	    -cache-inodes \
	    -J -l -b isolinux/isolinux.bin \
	    -c isolinux/boot.cat -no-emul-boot \
	    -boot-load-size 4 -boot-info-table . > ../$@


.PHONY: clean
clean:
	# Clean extract
	$(rootcmd) rm -rf extracted_cd
	$(rootcmd) rm -rf extracted_fs
	$(rootcmd) rm -rf customized_fs
	# Clean customization
	rm -f sources.list.orig
	# Clean target
	-rm -rf $(release)


.PHONY: realclean
realclean: clean
	# Clean download
	-rm -rf get


upload-stamp: $(target)
	rsync $(rsyncopts) $(release) $(uploadhost):$(uploadtestdir)
	theremd5=`ssh $(uploadhost) 'cd $(uploadtestdir)/$(targetdir); md5sum $(targetfile)'`\
		  && cd $(targetdir)\
		  && heremd5=`md5sum $(targetfile)`\
		  && echo "theremd5: $$theremd5"\
		  && echo "heremd5:  $$heremd5"\
		  && [ "$$theremd5" == "$$heremd5" ]
	ssh $(uploadhost) mv $(uploadtestdir)/$(targetdir)/$(targetfile) $(uploaddir)
	touch upload-stamp