# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as 
# published by the Free Software Foundation here:
# (http://www.gnu.org/licenses/gpl-2.0.html)
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

PWD := $(shell pwd)
PACKAGE := $(shell echo $(PWD)|sed 's/.*\///')
SNAPDIR = $(PWD)/SNAP
ROOT = $(PWD)/ROOT

BYTES = 0
SNAP = $(PACKAGE)-$(VERSION).snap
SNAPINFO = $(SNAPDIR)/snapinfo
MANIFEST = $(SNAPDIR)/manifest
USHER = $(SNAPDIR)/usher
FILES = $(SNAPDIR)/files.tar.gz

# The following values must be set in the Makefile for the package

ifndef ARCHIVE
$(error ARCHIVE is not set)
endif

ifndef SRCDIR
$(error SRCDIR is not set)
endif

ifndef VERSION
$(error VERSION is not set)
endif

$(SNAP): $(SNAPINFO) $(FILES)
	@if [ -f $(SNAP) ]; then \
		rm -v $(SNAP); \
	fi

	@ar cvr $(SNAP) $(SNAPINFO) $(MANIFEST); \
	if [ -f $(USHER) ]; then \
		chmod +x $(USHER); \
		ar cvr $(SNAP) $(USHER); \
	fi; \
	ar cvr $(SNAP) $(FILES)

	@echo "Successfully built $(SNAP)"

$(SNAPINFO): $(MANIFEST)
	@>$(SNAPINFO)
	$(eval BYTES := $(shell du -sB1 $(ROOT)|awk '{print $$1}'))

	@printf "package: $(PACKAGE)\nversion: $(VERSION)\n" > $(SNAPINFO); \
	printf "depends: $(DEPENDS)\narch: $(ARCH)\nbytes: $(BYTES)\n" \
		>> $(SNAPINFO); \
	printf "url: $(URL)\ndescription: $(DESC)\n" >> $(SNAPINFO)

$(MANIFEST): $(FILES)
	@>$(MANIFEST)

	@bytes=0; \
	rootfiles=`cd $(ROOT) && find ! -path .|sed 's/^\.\///'|sort -r`; \
	while read -r file; do \
		info=`ls -ld "$(ROOT)/$$file"`; \
		perm=`echo $$info|awk '{print $$1}'`; \
		type=`echo $$perm|head -c1`; \
		sha='________________________________________'; \
		if [ $$type = 'c' ]; then \
			size=0; \
		fi; \
		if [ -f "$(ROOT)/$$file" ]; then \
			sha=`sha1sum "$(ROOT)/$$file"|awk '{print $$1}'`; \
		fi; \
		printf "$$sha\t$$perm\t$$file\n" >> $(MANIFEST); \
	done <<< "$$rootfiles"

$(FILES): $(ROOT)
# Remove any perllocal.pod to avoid conflicts
# Should try to properly fix this some time...

	@find $(ROOT) -name perllocal.pod -exec rm {} \;

	@files=`find $(ROOT) -type f -exec file -i '{}' \;| grep \
		'application/x-\(executable\|object\|sharedlib\);' | \
		grep ' charset=binary'`; \
	while read -r line; do \
		file=`echo $$line|sed 's/: application\/x-.*//'`; \
		if [ "$$file" != '' ]; then \
			strip --strip-unneeded $$file; \
		fi; \
	done <<< "$$files"
	@cd $(ROOT) && tar cvzf $(FILES) *