source: trunk/debathena/debathena/config-package-dev/divert.mk @ 25800

Revision 25800, 6.1 KB checked in by geofft, 12 years ago (diff)
Line 
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
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 calls to the
25# functions in divert.sh.in to add and remove diversions and symlinks at
26# the appropriate points.
27
28ifndef _cdbs_rules_divert
29_cdbs_rules_divert = 1
30
31include /usr/share/cdbs/1/rules/debhelper.mk
32
33CDBS_BUILD_DEPENDS := $(CDBS_BUILD_DEPENDS), config-package-dev (>= 4.5~)
34
35# divert.sh.in is included in the postinst/prerm scripts of packages
36# installing diversions using config-package-dev.
37DEB_DIVERT_SCRIPT = /usr/share/config-package-dev/divert.sh.in
38# script used to encode the path of a file uniquely in a valid virtual
39# package name.
40DEB_DIVERT_ENCODER = /usr/share/config-package-dev/encode
41
42DEB_DIVERT_PACKAGES += $(foreach package,$(DEB_ALL_PACKAGES), \
43    $(if $(DEB_TRANSFORM_FILES_$(package)),$(package), \
44    $(if $(DEB_REMOVE_FILES_$(package)),$(package), \
45    $(if $(DEB_UNREMOVE_FILES_$(package)),$(package), \
46    $(if $(DEB_UNDIVERT_FILES_$(package)),$(package), \
47    $(if $(DEB_DIVERT_FILES_$(package)),$(package)))))))
48
49ifeq ($(DEB_DIVERT_EXTENSION),)
50DEB_DIVERT_EXTENSION = .divert
51endif
52
53# Replace only the last instance of DEB_DIVERT_EXTENSION in the
54# filename, to make it possible to divert /path/foo.divert to
55# foo.divert.divert-orig
56divert_files_replace_name = $(shell echo $(1) | perl -pe 's/(.*)\Q$(DEB_DIVERT_EXTENSION)\E/$$1$(2)/')
57
58# Encode a full path into the path it should be diverted to if it's
59# removed
60remove_files_name = /usr/share/$(cdbs_curpkg)/$(shell $(DEB_DIVERT_ENCODER) $(1))
61
62dh_compat_6 := $(shell if [ '$(DH_COMPAT)' -ge 6 ]; then echo y; fi)
63
64reverse = $(foreach n,$(shell seq $(words $(1)) -1 1),$(word $(n),$(1)))
65reverse_dh_compat_6 = $(if $(dh_compat_6),$(call reverse,$(1)),$(1))
66
67debian-divert/%: package = $(subst debian-divert/,,$@)
68debian-divert/%: divert_files = $(DEB_DIVERT_FILES_$(package)) $(DEB_TRANSFORM_FILES_$(package))
69debian-divert/%: divert_remove_files = $(DEB_REMOVE_FILES_$(package))
70debian-divert/%: divert_undivert_files = $(DEB_UNDIVERT_FILES_$(package))
71debian-divert/%: divert_unremove_files = $(DEB_UNREMOVE_FILES_$(package))
72debian-divert/%: divert_files_all = $(strip $(divert_files) $(divert_remove_files) $(divert_undivert_files) $(divert_unremove_files))
73debian-divert/%: divert_files_thispkg = $(strip $(divert_files) $(divert_remove_files))
74$(patsubst %,debian-divert/%,$(DEB_DIVERT_PACKAGES)) :: debian-divert/%:
75#   Writing shell scripts in makefiles sucks.  Remember to $$ shell
76#   variables and include \ at the end of each line.
77# Add code to postinst to add/remove diversions as appropriate
78        set -e; \
79        { \
80            sed 's/#PACKAGE#/$(cdbs_curpkg)/g; s/#DEB_DIVERT_EXTENSION#/$(DEB_DIVERT_EXTENSION)/g' $(DEB_DIVERT_SCRIPT); \
81            $(if $(divert_files_all), \
82                echo 'if [ "$$1" = "configure" ]; then'; \
83                $(foreach file,$(divert_undivert_files), \
84                    echo "    check_undivert_unlink $(call divert_files_replace_name,$(file), )"; )\
85                $(foreach file,$(divert_unremove_files), \
86                    echo "    check_undivert_unremove $(file) $(call remove_files_name,$(file))"; )\
87                $(foreach file,$(divert_files), \
88                    echo "    divert_link $(call divert_files_replace_name,$(file), )";) \
89                $(foreach file,$(divert_remove_files), \
90                    mkdir -p debian/$(cdbs_curpkg)/usr/share/$(cdbs_curpkg); \
91                    echo "    divert_remove $(file) $(call remove_files_name,$(file))";) \
92                echo 'fi'; \
93            ) \
94        } >> $(CURDIR)/debian/$(cdbs_curpkg).postinst.debhelper
95# Add code to prerm script to undo diversions when package is removed.
96        set -e; \
97        { \
98            $(if $(dh_compat_6),, \
99                if [ -e $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper ]; then \
100                    cat $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper; \
101                fi;) \
102            sed 's/#PACKAGE#/$(cdbs_curpkg)/g; s/#DEB_DIVERT_EXTENSION#/$(DEB_DIVERT_EXTENSION)/g' $(DEB_DIVERT_SCRIPT); \
103            $(if $(divert_files_thispkg), \
104                echo 'if [ "$$1" = "remove" ] || [ "$$1" = "deconfigure" ]; then'; \
105                $(foreach file,$(call reverse_dh_compat_6,$(divert_files)), \
106                    echo "    undivert_unlink $(call divert_files_replace_name,$(file), )";) \
107                $(foreach file,$(call reverse_dh_compat_6,$(divert_remove_files)), \
108                    echo "    undivert_unremove $(file) $(cdbs_curpkg)";) \
109                echo 'fi'; \
110            ) \
111            $(if $(dh_compat_6), \
112                if [ -e $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper ]; then \
113                    cat $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper; \
114                fi;) \
115        } >> $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper.new
116        mv $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper.new \
117            $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper
118# Add an encoding of the names of the diverted files to the Provides:
119# and Conflicts: lists.  This prevents two packages diverting the same
120# file from being installed simultaneously (it cannot work, and this
121# produces a much less ugly error).  Requires in debian/control:
122#   Provides: ${diverted-files}
123#   Conflicts: ${diverted-files}
124        set -e; \
125        { \
126            echo -n "diverted-files="; \
127            $(foreach file,$(divert_files_thispkg),\
128                echo -n "diverts-"; \
129                ${DEB_DIVERT_ENCODER} "$(call divert_files_replace_name,$(file))"; \
130                echo -n ", ";) \
131            echo; \
132        } >> $(CURDIR)/debian/$(cdbs_curpkg).substvars
133
134$(patsubst %,binary-post-install/%,$(DEB_DIVERT_PACKAGES)) :: binary-post-install/%: debian-divert/%
135
136endif
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