###
###  More fundamental definitions at the top, big "user"-level
###  definitions at the end, and .ISO-like targets in the middle
###


################################
### build tracking variables
################################

# keep in sync with "./build" script
prevbuild := $(shell cat < lastbuild)
buildstem := $(shell python -c "print '$(prevbuild)'.split('.')[0][:-2];")
nextbuild := $(shell python -c "print '%0.2d' % (int('$(prevbuild)'.split('.')[0][-2:]) + 1);")
buildname := $(buildstem)$(nextbuild)


################################
### Fundamental rules
################################

create.%: sized.% %.sha1sum
	echo $@ done

sized.%: % %.size.txt
	echo $@ done

%.size.txt: %
	du -sk $^ | cut -f 1 > $@
%.sha1sum: %
	sha1sum $^ > $@
%.tree.tar: %.tree
	tar -c -C $^ . > $@
%.tree.tar.lzma: %.tree.tar
	lzma -1kf $^
%.tar.lzma: %
	tar -c $^ | lzma -1 > $@


################################
### The Really Interesting Artifacts: .ISOs, .IMG files, VMDK
################################

soas%xo.iso:
	livecd-creator --cache=../cache --fslabel soas$*xo -c ../soas-xo.ks
soas%.iso:
	livecd-creator --cache=../cache --fslabel soas$* -c ../soas.ks
soas%.vmdk:
	appliance-creator --cache=../cache -n soas$* -f vmdk --checksum -p zip -c ../soas-appliance.ks
soas%.vmdk.zip: soas%.vmdk
	echo "created $@"

soas%.tree: soas%.iso
	../livecd-iso-to-bootable-tree.sh $^ $@
	touch $@
	chroot $@ rpm -qa | sort > $@.packages.txt
	chroot $@ rpm -qa --queryformat="%10{SIZE}\t%{NAME}\n" | sort -k1,1n > $@.packages-sizes.txt

soas%.fulldisk.img: soas%.tree
	../bootable-tree-to-fulldisk-img.sh $^ $@

soas%xo.img: soas%xo.tree
	../bootable-tree-to-xo.sh $^ $@
soas%xo.plc: soas%xo.img
	../image-digestor.sh $^



################################
### Announcements, size changes, xdeltas, and other .txt files
################################

exts := .tree .fulldisk.img.tar.lzma xo.tree xo.img
sized_names = soas$(nextbuild)$(ext).size-change.txt
sized_changes := $(foreach ext,$(exts),$(sized_names))

soas%.announcement.txt: $(sized_changes) soas%.tree.package-changes.txt
	../announce . soas$*

soas$(nextbuild)%.size-change.txt: soas$(nextbuild)%.size.txt $(prevbuild)%.size.txt
	cat $^ | python -c "import sys; oldk, newk = [int(l.strip()) for l in sys.stdin.readlines()] ; print '%0.2fM / %dK' % (newk / 1024.0, newk - oldk)" > $@

soas%.tree.tar.xdelta: soas%.tree.tar
	-xdelta delta $(prevbuild).tree.tar $^ $@

soas$(nextbuild)fulldisk.img.xdelta: soas$(nextbuild)fulldisk.img
	-xdelta delta $(prevbuild)fulldisk.img $^ $@

soas$(nextbuild).tree.package-changes.txt: $(prevbuild).tree.packages.txt soas$(nextbuild).tree.packages.txt
	diff -U 1 $^ | grep -v ^@@ > $@ || echo "[No changes]" > $@


################################
### Big XXXX.done target and make-isms like .PRECIOUS
################################

.PRECIOUS: soas%.iso soas%.tree soas%.tree.tar soas%.tree.tar.lzma \
			soas%.fulldisk.img soas%.fulldisk.img.tar.lzma soas%.fulldisk.img.tar.lzma.size-change.txt \
			soas%xo.fulldisk.img soas%xo.fulldisk.img.tar.lzma soas%xo.fulldisk.img.tar.lzma.size-change.txt \
			soas%xo.iso soas%xo.tree soas%xo.tree.tar soas%xo.tree.tar.lzma \
			soas%xo.img soas%xo.plc \
			soas%xo.tree.size-change.txt \
			soas%xo.img.size-change.txt \
			soas%.tree.size-change.txt \
			%.size.txt %.sha1sum \
			soas%.vmdk soas%.vmdk.zip \
			soas%.announcement.txt

soas%.done: create.soas%.iso sized.soas%.tree \
			create.soas%.tree.tar.lzma soas%.tree.tar.xdelta \
			create.soas%.fulldisk.img.tar.lzma \
			create.soas%xo.iso sized.soas%xo.tree \
			create.soas%xo.tree.tar.lzma soas%xo.tree.tar.xdelta \
			create.soas%xo.fulldisk.img.tar.lzma \
			create.soas%xo.img soas%xo.plc \
			create.soas%.vmdk.zip
	touch $@


################################
### high-level targets like "all" and "clean"
################################

all: soas$(nextbuild).done soas$(nextbuild).announcement.txt
	echo soas$(nextbuild) > lastbuild

artifacts = $(wildcard *.txt) $(wildcard *.tree) $(wildcard *.tar)		\
			$(wildcard *.img) $(wildcard *.iso) $(wildcard *.plc)		\
			$(wildcard *.crc) $(wildcard *.lzma) $(wildcard *.sha1sum)  \
			$(wildcard *.done)

clean:
	rm -rf $(filter-out soas$(nextbuild)% $(prevbuild)%,$(artifacts))

.PHONY: create.% sized.% all clean