# @configure_input@
#
# $Id$
#
# Written by Keith Marshall <keithmarshall@users.sourceforge.net>
# Copyright (C) 2010, 2011, MinGW Project
#
#
# Makefile template for generating mingw-get distribution manifests.
#
#   Project: @PACKAGE_TARNAME@
#   Version: @PACKAGE_VERSION@
#
#
# This is free software.  Permission is granted to copy, modify and
# redistribute this software, under the provisions of the GNU General
# Public License, Version 3, (or, at your option, any later version),
# as published by the Free Software Foundation; see the file COPYING
# for licensing details.
#
# Note, in particular, that this software is provided "as is", in the
# hope that it may prove useful, but WITHOUT WARRANTY OF ANY KIND; not
# even an implied WARRANTY OF MERCHANTABILITY, nor of FITNESS FOR ANY
# PARTICULAR PURPOSE.  Under no circumstances will the author, or the
# MinGW Project, accept liability for any damages, however caused,
# arising from the use of this software.
#
VPATH = ${srcdir}

# Define hooks for invoking system tools.
#
LN_S = @LN_S@

all: all-distfiles

# To accommodate a top-level make on just a single subdirectory, we list
# each of the managed subdirectories as an independent goal, invoking the
# "all" action for the target subdirectory.
#
@mingw_ac_subdirs@: all

# We use an automatically generated Makefile.sub to manage the list
# of distributable files, ensuring that we automatically capture all
# XML files in the source directory, and converting them to serialised
# LZMA compressed format for upload to the repository server.
#
Makefile.sub: ${srcdir}/*.xml
	echo "auto-distfiles = \\" > $@
	for file in $^; do echo "$$file.lzma \\" | sed 's,.*/,  ,' >> $@; done
	echo '  $$(EXTRA_DISTFILES)' >> $@

include Makefile.sub
all-distfiles: unpublished $(DISTFILES) $(auto-distfiles)

# Distributed manifests are serialised by incorporating a date-stamped
# issue number, of the form YYYYMMDDNN; we track issue numbers using the
# issue.log file, (which we keep in CVS to ensure that all maintainers
# can share a common issue number registry).
#
issue_number = YYYYMMDDNN
issue_key = awk '$$3 == "$*.xml" { print $$1 }' issue.new
issue_log = ${srcdir}/issue.log

# We use SHA1 hashes to determine when source files have been changed
# from the last published version, as recorded in `issue.log'; the hash
# is computed by openssl, after filtering the source through awk; (this
# ensures that the computed hash is not influenced by any unintentional
# pollution due to accidental insertion of CRLF line endings).
#
sha1hash = awk '{ sub( "\r$$", "" ); print }' $< | $(sha1sum)
sha1sum = openssl sha1 | awk '{print $$NF}'

# Formatting within issue.log is controlled by PAD and TAB settings.
#
TAB = [	 ]
PAD = "  "

# The following generic rule processes an XML source template, inserting
# the appropriate issue number, and compressing to yield the required LZMA
# distribution manifest.  The generated issue number which gets applied is
# appropriately serialised relative to the original record for the  source
# XML file being processed, as noted in the local copy of issue.log, which
# is then updated to record the new issue number; to avoid any regression
# of issue numbers, all maintainers are advised to update issue.log from
# CVS immediately prior manifest generation, and to commit back as soon
# as possible thereafter; any ensuing conflict must be resolved before
# any updated manifest is uploaded to the repository server.
#
%.xml.lzma: %.xml
	>> $(issue_log)
	rm -f issue.new issue.tmp
	sed '/^$(TAB)*$$/d;/^$(TAB)*#/d' $(issue_log) > issue.new
	issue=`awk '$$3 == "$*.xml" { print $$2 }' issue.new`; \
	if test x$${hash="`$(sha1hash)`"} != x"`$(issue_key)`"; then \
	  test -n "$$issue" || issue=0; \
	  test $$issue -lt $${mark="`date -u +%Y%m%d`00"} && \
	    issue=$$mark || issue=`expr $$issue + 1`; \
	  awk '$$3 != "$*.xml"' issue.new > issue.tmp; \
	  echo $(PAD)$$hash $$issue $*.xml >> issue.tmp; \
	  fi; \
	sed "s/@$(issue_number)@/$$issue/" $< | lzma -c > $@
	if test -f issue.tmp; then \
	  sed -n '/^$(TAB)*$$/q;/^$(TAB)*[^#]/q;p' $(issue_log) > issue.new; \
	  LC_COLLATE=POSIX sort -k3 issue.tmp >> issue.new; \
	  sed -n 's/^$(TAB)*$$/break/;1,/^$(TAB)*[^#]/d;/^$(TAB)*#/p' \
	    $(issue_log) >> issue.new; \
	  rm -f $(issue_log) && mv issue.new $(issue_log); \
	  cd unpublished && $(LN_S) -f ../$@ .; \
	  fi
	rm -f issue.new issue.tmp

.PHONY: FORCE
# An internal target, to specify a dependency which must always be updated.
FORCE:

# Create a local directory in which to collect files which we have generated,
# but we have not yet published; (we make this a prerequisite of all sources,
# to ensure that it is created when the source directory is scanned to create
# Makefile.sub, so that will always exist when any individual source file is
# processed, even on explicit file-by-file request).
#
${srcdir}/*.xml: unpublished
unpublished: FORCE
	test -d unpublished || mkdir unpublished

# $RCSfile$: end of file