[config-package-dev.git] / divert.mk

# -*- mode: makefile; coding: utf-8 -*-
# Copyright © 2007-2008 Anders Kaseorg <andersk@mit.edu> and
#                       Tim Abbott <tabbott@mit.edu>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2, or (at
# your option) any later version.
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307 USA.

# Don't include divert.mk in your rules files directly; instead use
# config-package.mk.

# divert.mk handles the low-level diversion logic.  It includes
# divert.sh.in in the postinst and prerm scripts, and adds 

ifndef _cdbs_rules_divert
_cdbs_rules_divert = 1

include /usr/share/cdbs/1/rules/debhelper.mk

CDBS_BUILD_DEPENDS := $(CDBS_BUILD_DEPENDS), config-package-dev (>= 4.5~)

# divert.sh.in is included in the postinst/prerm scripts of packages
# installing diversions using config-package-dev.
DEB_DIVERT_SCRIPT = /usr/share/config-package-dev/divert.sh.in
# script used to encode the path of a file uniquely in a valid virtual
# package name.
DEB_DIVERT_ENCODER = /usr/share/config-package-dev/encode

DEB_DIVERT_PACKAGES += $(foreach package,$(DEB_ALL_PACKAGES), \
    $(if $(DEB_TRANSFORM_FILES_$(package)),$(package), \
    $(if $(DEB_REMOVE_FILES_$(package)),$(package), \
    $(if $(DEB_UNREMOVE_FILES_$(package)),$(package), \
    $(if $(DEB_UNDIVERT_FILES_$(package)),$(package), \
    $(if $(DEB_DIVERT_FILES_$(package)),$(package)))))))

ifeq ($(DEB_DIVERT_EXTENSION),)
DEB_DIVERT_EXTENSION = .divert
endif

# Replace only the last instance of DEB_DIVERT_EXTENSION in the
# filename, to make it possible to divert /path/foo.divert to
# foo.divert.divert-orig
divert_files_replace_name = $(shell echo $(1) | perl -pe 's/(.*)\Q$(DEB_DIVERT_EXTENSION)\E/$$1$(2)/')

debian-divert/%: package = $(subst debian-divert/,,$@)
debian-divert/%: divert_files = $(DEB_DIVERT_FILES_$(package)) $(DEB_TRANSFORM_FILES_$(package))
debian-divert/%: divert_remove_files = $(DEB_REMOVE_FILES_$(package))
debian-divert/%: divert_undivert_files = $(DEB_UNDIVERT_FILES_$(package))
debian-divert/%: divert_unremove_files = $(DEB_UNREMOVE_FILES_$(package))
debian-divert/%: divert_files_all = $(strip $(divert_files) $(divert_remove_files) $(divert_undivert_files) $(divert_unremove_files))
debian-divert/%: divert_files_thispkg = $(strip $(divert_files) $(divert_remove_files))
$(patsubst %,debian-divert/%,$(DEB_DIVERT_PACKAGES)) :: debian-divert/%:
#   Writing shell scripts in makefiles sucks.  Remember to $$ shell
#   variables and include \ at the end of each line.
# Add code to postinst to add/remove diversions as appropriate
	set -e; \
	{ \
	    sed 's/#PACKAGE#/$(cdbs_curpkg)/g; s/#DEB_DIVERT_EXTENSION#/$(DEB_DIVERT_EXTENSION)/g' $(DEB_DIVERT_SCRIPT); \
	    $(if $(divert_files_all), \
		echo 'if [ "$$1" = "configure" ]; then'; \
		$(foreach file,$(divert_undivert_files), \
		    $(if $(DEB_UNDIVERT_VERSION_$(file)),,\
			echo "ERROR!  Missing undivert version for $(file)!">&2; exit 1;) \
		    echo -n "    if [ -n \"\$$2\" ] && dpkg --compare-versions \"\$$2\" '<<' "; \
		    echo "'$(DEB_UNDIVERT_VERSION_$(file))'; then"; \
		    echo "        undivert_unlink $(call divert_files_replace_name,$(file), )"; \
		    echo "    fi";) \
		$(foreach file,$(divert_unremove_files), \
		    $(if $(DEB_UNREMOVE_VERSION_$(file)),,\
			echo "ERROR!  Missing unremove version for $(file)!">&2; exit 1;) \
		    echo -n "    if [ -n \"\$$2\" ] && dpkg --compare-versions \"\$$2\" '<<' "; \
		    echo "'$(DEB_UNREMOVE_VERSION_$(file))'; then"; \
		    echo "        undivert_unremove $(file)"; \
		    echo "    fi";) \
		$(foreach file,$(divert_files), \
		    echo "    divert_link $(call divert_files_replace_name,$(file), )";) \
		$(foreach file,$(divert_remove_files), \
		    mkdir -p debian/$(cdbs_curpkg)/usr/share/$(cdbs_curpkg); \
		    echo "    divert_remove $(file) /usr/share/$(cdbs_curpkg)/`$(DEB_DIVERT_ENCODER) $(file)`";) \
		echo 'fi'; \
	    ) \
	} >> $(CURDIR)/debian/$(cdbs_curpkg).postinst.debhelper
# Add code to prerm script to undo diversions when package is removed.
	set -e; \
	{ \
	    sed 's/#PACKAGE#/$(cdbs_curpkg)/g; s/#DEB_DIVERT_EXTENSION#/$(DEB_DIVERT_EXTENSION)/g' $(DEB_DIVERT_SCRIPT); \
	    $(if $(divert_files_thispkg), \
		echo 'if [ "$$1" = "remove" ]; then'; \
		$(foreach file,$(divert_files), \
		    echo "    undivert_unlink $(call divert_files_replace_name,$(file), )";) \
		$(foreach file,$(divert_remove_files), \
		    echo "    undivert_unremove $(file) $(cdbs_curpkg)";) \
		echo 'fi'; \
	    ) \
	} >> $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper
# Add an encoding of the names of the diverted files to the Provides:
# and Conflicts: lists.  This prevents two packages diverting the same
# file from being installed simultaneously (it cannot work, and this
# produces a much less ugly error).  Requires in debian/control:
#   Provides: $(diverted-files)
#   Conflicts: $(diverted-files)
	set -e; \
	{ \
	    echo -n "diverted-files="; \
	    $(foreach file,$(divert_files_thispkg),\
		echo -n "diverts-"; \
		${DEB_DIVERT_ENCODER} "$(call divert_files_replace_name,$(file))"; \
		echo -n ", ";) \
	    echo; \
	} >> $(CURDIR)/debian/$(cdbs_curpkg).substvars

$(patsubst %,binary-post-install/%,$(DEB_DIVERT_PACKAGES)) :: binary-post-install/%: debian-divert/%

endif
Commit	Line	Data
ab8e2a67 TA	1	# -- mode: makefile; coding: utf-8 --
	2	# Copyright © 2007-2008 Anders Kaseorg <andersk@mit.edu> and
	3	# Tim Abbott <tabbott@mit.edu>
	4	#
	5	# This program is free software; you can redistribute it and/or
	6	# modify it under the terms of the GNU General Public License as
	7	# published by the Free Software Foundation; either version 2, or (at
	8	# your option) any later version.
	9	#
	10	# This program is distributed in the hope that it will be useful, but
	11	# WITHOUT ANY WARRANTY; without even the implied warranty of
	12	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	# General Public License for more details.
	14	#
	15	# You should have received a copy of the GNU General Public License
	16	# along with this program; if not, write to the Free Software
	17	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	18	# 02111-1307 USA.
	19
56709134 TA	20	# Don't include divert.mk in your rules files directly; instead use
	21	# config-package.mk.
	22
	23	# divert.mk handles the low-level diversion logic. It includes
	24	# divert.sh.in in the postinst and prerm scripts, and adds
	25
ab8e2a67 TA	26	ifndef _cdbs_rules_divert
	27	_cdbs_rules_divert = 1
	28
be43c288 TA	29	include /usr/share/cdbs/1/rules/debhelper.mk
be43c288 TA	30
02bde96f	31	CDBS_BUILD_DEPENDS := $(CDBS_BUILD_DEPENDS), config-package-dev (>= 4.5~)
ab8e2a67	32
56709134 TA	33	# divert.sh.in is included in the postinst/prerm scripts of packages
56709134 TA	34	# installing diversions using config-package-dev.
ab8e2a67	35	DEB_DIVERT_SCRIPT = /usr/share/config-package-dev/divert.sh.in
56709134 TA	36	# script used to encode the path of a file uniquely in a valid virtual
	37	# package name.
	38	DEB_DIVERT_ENCODER = /usr/share/config-package-dev/encode
ab8e2a67 TA	39
ab8e2a67 TA	40	DEB_DIVERT_PACKAGES += $(foreach package,$(DEB_ALL_PACKAGES), \
02bde96f	41	$(if $(DEB_TRANSFORM_FILES_$(package)),$(package), \
936cb21e TA	42	$(if $(DEB_REMOVE_FILES_$(package)),$(package), \
	43	$(if $(DEB_UNREMOVE_FILES_$(package)),$(package), \
	44	$(if $(DEB_UNDIVERT_FILES_$(package)),$(package), \
	45	$(if $(DEB_DIVERT_FILES_$(package)),$(package)))))))
ab8e2a67 TA	46
	47	ifeq ($(DEB_DIVERT_EXTENSION),)
	48	DEB_DIVERT_EXTENSION = .divert
	49	endif
	50
56709134 TA	51	# Replace only the last instance of DEB_DIVERT_EXTENSION in the
	52	# filename, to make it possible to divert /path/foo.divert to
	53	# foo.divert.divert-orig
936cb21e TA	54	divert_files_replace_name = $(shell echo $(1) \| perl -pe 's/(.*)\Q$(DEB_DIVERT_EXTENSION)\E/$$1$(2)/')
936cb21e TA	55
ab8e2a67	56	debian-divert/%: package = $(subst debian-divert/,,$@)
02bde96f	57	debian-divert/%: divert_files = $(DEB_DIVERT_FILES_$(package)) $(DEB_TRANSFORM_FILES_$(package))
936cb21e TA	58	debian-divert/%: divert_remove_files = $(DEB_REMOVE_FILES_$(package))
	59	debian-divert/%: divert_undivert_files = $(DEB_UNDIVERT_FILES_$(package))
	60	debian-divert/%: divert_unremove_files = $(DEB_UNREMOVE_FILES_$(package))
	61	debian-divert/%: divert_files_all = $(strip $(divert_files) $(divert_remove_files) $(divert_undivert_files) $(divert_unremove_files))
	62	debian-divert/%: divert_files_thispkg = $(strip $(divert_files) $(divert_remove_files))
ab8e2a67	63	$(patsubst %,debian-divert/%,$(DEB_DIVERT_PACKAGES)) :: debian-divert/%:
56709134 TA	64	# Writing shell scripts in makefiles sucks. Remember to $$ shell
	65	# variables and include \ at the end of each line.
	66	# Add code to postinst to add/remove diversions as appropriate
3aab360a AK	67	set -e; \
3aab360a AK	68	{ \
ab8e2a67	69	sed 's/#PACKAGE#/$(cdbs_curpkg)/g; s/#DEB_DIVERT_EXTENSION#/$(DEB_DIVERT_EXTENSION)/g' $(DEB_DIVERT_SCRIPT); \
936cb21e	70	$(if $(divert_files_all), \
ab8e2a67	71	echo 'if [ "$$1" = "configure" ]; then'; \
936cb21e	72	$(foreach file,$(divert_undivert_files), \
02bde96f	73	$(if $(DEB_UNDIVERT_VERSION_$(file)),,\
936cb21e TA	74	echo "ERROR! Missing undivert version for $(file)!">&2; exit 1;) \
936cb21e TA	75	echo -n " if [ -n \"\$$2\" ] && dpkg --compare-versions \"\$$2\" '<<' "; \
02bde96f	76	echo "'$(DEB_UNDIVERT_VERSION_$(file))'; then"; \
936cb21e TA	77	echo " undivert_unlink $(call divert_files_replace_name,$(file), )"; \
	78	echo " fi";) \
	79	$(foreach file,$(divert_unremove_files), \
02bde96f	80	$(if $(DEB_UNREMOVE_VERSION_$(file)),,\
936cb21e TA	81	echo "ERROR! Missing unremove version for $(file)!">&2; exit 1;) \
936cb21e TA	82	echo -n " if [ -n \"\$$2\" ] && dpkg --compare-versions \"\$$2\" '<<' "; \
02bde96f	83	echo "'$(DEB_UNREMOVE_VERSION_$(file))'; then"; \
936cb21e TA	84	echo " undivert_unremove $(file)"; \
936cb21e TA	85	echo " fi";) \
ab8e2a67	86	$(foreach file,$(divert_files), \
936cb21e TA	87	echo " divert_link $(call divert_files_replace_name,$(file), )";) \
936cb21e TA	88	$(foreach file,$(divert_remove_files), \
a7a01014	89	mkdir -p debian/$(cdbs_curpkg)/usr/share/$(cdbs_curpkg); \
936cb21e	90	echo " divert_remove $(file) /usr/share/$(cdbs_curpkg)/`$(DEB_DIVERT_ENCODER) $(file)`";) \
ab8e2a67 TA	91	echo 'fi'; \
ab8e2a67 TA	92	) \
3aab360a	93	} >> $(CURDIR)/debian/$(cdbs_curpkg).postinst.debhelper
56709134	94	# Add code to prerm script to undo diversions when package is removed.
3aab360a AK	95	set -e; \
3aab360a AK	96	{ \
ab8e2a67	97	sed 's/#PACKAGE#/$(cdbs_curpkg)/g; s/#DEB_DIVERT_EXTENSION#/$(DEB_DIVERT_EXTENSION)/g' $(DEB_DIVERT_SCRIPT); \
936cb21e	98	$(if $(divert_files_thispkg), \
ab8e2a67 TA	99	echo 'if [ "$$1" = "remove" ]; then'; \
ab8e2a67 TA	100	$(foreach file,$(divert_files), \
936cb21e TA	101	echo " undivert_unlink $(call divert_files_replace_name,$(file), )";) \
	102	$(foreach file,$(divert_remove_files), \
	103	echo " undivert_unremove $(file) $(cdbs_curpkg)";) \
ab8e2a67 TA	104	echo 'fi'; \
ab8e2a67 TA	105	) \
3aab360a	106	} >> $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper
56709134 TA	107	# Add an encoding of the names of the diverted files to the Provides:
	108	# and Conflicts: lists. This prevents two packages diverting the same
	109	# file from being installed simultaneously (it cannot work, and this
	110	# produces a much less ugly error). Requires in debian/control:
	111	# Provides: $(diverted-files)
	112	# Conflicts: $(diverted-files)
3aab360a AK	113	set -e; \
3aab360a AK	114	{ \
ab8e2a67	115	echo -n "diverted-files="; \
936cb21e	116	$(foreach file,$(divert_files_thispkg),\
56709134	117	echo -n "diverts-"; \
936cb21e	118	${DEB_DIVERT_ENCODER} "$(call divert_files_replace_name,$(file))"; \
ab8e2a67	119	echo -n ", ";) \
3aab360a AK	120	echo; \
3aab360a AK	121	} >> $(CURDIR)/debian/$(cdbs_curpkg).substvars
ab8e2a67	122
be43c288	123	$(patsubst %,binary-post-install/%,$(DEB_DIVERT_PACKAGES)) :: binary-post-install/%: debian-divert/%
ab8e2a67 TA	124
ab8e2a67 TA	125	endif