#
# Makefile to generate release tarballs and other administrative tasks
# provided by Daniel Hermann
#

#
# Generation of a release tarball:
#   - all directories in DISTDIRS are included
#   - all files in DISTFILES are included
#   - all files in KERNELFILES are included as copies in the kernel/
#     subdirectory
#   - a file DISTVERSION is included containing the release version
#
# The generated tarball gets a version determined by DISTVERSION,
# which is either specified as a command line parameter
#      $ make -f Makefile.dist DISTVERSION=1.2.3
# or is set to a "reasonable" default (e.g. 0.0.0.X, see below).
# A file DISTVERSION is generated containing that version.
#
# Note: The DISTVERSION file is also included in KERNELFILES so that it
#       gets copied into the kernel/ subdirectory
#

KERNELFILES := DISTVERSION
DISTDIRS := kernel userspace scripts docu pre-patches
DISTFILES := AUTHORS ChangeLog COPYING INSTALL NEWS README DISTVERSION
DISTVERSION := 0.0.0.$(shell date +%Y%m%d)
GITHEAD := $(shell git rev-parse --short HEAD )
DISTTMPDIR := disttmp

TARBALL := mars-$(DISTVERSION).tar.bz2
GENFILES := DISTVERSION


default: dist

clean:
	@echo "Cleaning up (clean)"
	@rm -f *~ $(GENFILES)

distclean: clean
	@echo "Cleaning up (distclean)"
	@rm -rf $(DISTTMPDIR)/
	@rm -f mars-*.tar.bz2

# Copy files to subdir $(DISTTMPDIR)/ and create a distribution tarball
dist: distclean $(GENFILES)
	@echo "Copying files and creating tarball"
	@set -e; \
	mkdir -p $(DISTTMPDIR)/kernel; \
	cp -a $(DISTFILES) $(DISTTMPDIR)/; \
	cp -a $(DISTDIRS) $(DISTTMPDIR)/; \
	cp -a $(KERNELFILES) $(DISTTMPDIR)/kernel/; \
	tar --owner=0 --group=0 --transform='s#^$(DISTTMPDIR)#mars-$(DISTVERSION)#' \
	    -cjf $(TARBALL) $(DISTTMPDIR)/

DISTVERSION:
	@echo "Generating $@ ($(DISTVERSION))"
	/bin/echo "$(DISTVERSION)-$(GITHEAD)" > $@


.PHONY: default clean distclean dist DISTVERSION