# 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.

DEPENDS =
ARCH = x86_64
URL = https://www.kernel.org/
DESC = Linux is a clone of the operating system Unix, written from scratch \
by Linus Torvalds with assistance from a loosely-knit team of hackers \
across the Net.
SNAPVER = sr0

ARCHIVE := $(PWD)/SRC/$(shell ls SRC|egrep '(bz2|gz|tar|xz)$$'|tail -1)
TYPE := $(shell file -ib $(ARCHIVE)|cut -d';' -f1|tr -d '\n')
SRCDIR := $(shell tar -tf $(ARCHIVE)|head -1|sed 's/\/.*//')
PATCHDIR := $(PWD)/SRC/patches
KERNVER := $(shell echo $(SRCDIR)|egrep -o '\-[0-9].*'|sed 's/^-//')
VERSION := $(SNAPVER)

MAKE = make
MAKEINST = make install

include /usr/share/snap/Makefile.snaplinux

$(SRCDIR)/Makefile: $(ARCHIVE)
	@if [ '$(TYPE)' == 'application/x-bzip2' ]; then \
		tar -jxf $(ARCHIVE); \
	elif [ '$(TYPE)' == 'application/x-gzip' ]; then \
		tar -zxf $(ARCHIVE); \
	elif [ '$(TYPE)' == 'application/x-tar' ]; then \
		tar -xf $(ARCHIVE); \
	elif [ '$(TYPE)' == 'application/x-xz' ]; then \
		tar -xf $(ARCHIVE); \
	else \
		echo 'Unable to determine archive type'; \
		exit 1; \
	fi
	@touch $(SRCDIR)/Makefile

$(SRCDIR)/arch/x86_64/boot/bzImage: $(SRCDIR)/Makefile
	@cd $(SRCDIR); \
	make mrproper
	@cp SNAP/config-$(KERNVER)-$(VERSION) $(SRCDIR)/.config
	@cd $(SRCDIR); \
	make

$(ROOT): $(SRCDIR)/arch/x86_64/boot/bzImage
	@if [ -d $(ROOT) ]; then \
		touch $(ROOT); \
	else \
		mkdir -v $(ROOT); \
	fi

	@cd $(SRCDIR); \
	make modules_install INSTALL_MOD_PATH=$(ROOT) && \
	make headers_install INSTALL_HDR_PATH=$(ROOT)/usr && \
	install -d -m 755 $(ROOT)/boot && \
	install -d -m 755 $(ROOT)/etc/modprobe.d && \
	install -d -m 755 $(ROOT)/usr/share/doc/linux && \
	install -m 644 .config $(ROOT)/boot/config-$(KERNVER)-$(VERSION) && \
	install -m 644 System.map \
		$(ROOT)/boot/System.map-$(KERNVER)-$(VERSION) && \
	install -m 644 arch/x86_64/boot/bzImage \
		$(ROOT)/boot/vmlinuz-$(KERNVER)-$(VERSION) && \
	install -m 644 ../SNAP/usb.conf $(ROOT)/etc/modprobe.d/usb.conf && \
	cd Documentation; for thing in `find`; do \
		if [ -d $$thing ]; then \
			install -d -m 755 $(ROOT)/usr/share/doc/linux/$$thing; \
		else \
			install -m 644 $$thing $(ROOT)/usr/share/doc/linux; \
		fi; \
	done

test: $(ROOT)
	@cd $(SRCDIR); \
	make test

clean:
	@rm -rvf $(ROOT) \
		$(SNAPINFO) \
		$(MANIFEST) \
		$(FILES) \
		$(SRCDIR)