1 # -*- mode: makefile; coding: utf-8 -*-
2 # Copyright © 2007-2008 Anders Kaseorg <andersk@mit.edu> and
3 # Tim Abbott <tabbott@mit.edu>
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.
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.
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
20 # Don't include divert.mk in your rules files directly; instead use
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.
28 ifndef _cdbs_rules_divert
29 _cdbs_rules_divert = 1
31 include /usr/share/cdbs/1/rules/debhelper.mk
33 CDBS_BUILD_DEPENDS := $(CDBS_BUILD_DEPENDS), config-package-dev (>= 4.5~)
35 # divert.sh.in is included in the postinst/prerm scripts of packages
36 # installing diversions using config-package-dev.
37 DEB_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
40 DEB_DIVERT_ENCODER = /usr/share/config-package-dev/encode
42 DEB_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)),$(package)))))))
49 ifeq ($(DEB_DIVERT_EXTENSION),)
50 DEB_DIVERT_EXTENSION = .divert
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
56 divert_files_replace_name = $(shell echo $(1) | perl -pe 's/(.*)\Q$(DEB_DIVERT_EXTENSION)\E/$$1$(2)/')
58 # Encode a full path into the path it should be diverted to if it's
60 remove_files_name = /usr/share/$(cdbs_curpkg)/$(shell $(DEB_DIVERT_ENCODER) $(1))
62 dh_compat_6 := $(shell if [ '$(DH_COMPAT)' -ge 6 ]; then echo y; fi)
64 reverse = $(foreach n,$(shell seq $(words $(1)) -1 1),$(word $(n),$(1)))
65 reverse_dh_compat_6 = $(if $(dh_compat_6),$(call reverse,$(1)),$(1))
67 debian-divert/%: package = $(subst debian-divert/,,$@)
68 debian-divert/%: divert_files = $(DEB_DIVERT_FILES_$(package)) $(DEB_TRANSFORM_FILES_$(package))
69 debian-divert/%: divert_remove_files = $(DEB_REMOVE_FILES_$(package))
70 debian-divert/%: divert_undivert_files = $(DEB_UNDIVERT_FILES_$(package))
71 debian-divert/%: divert_unremove_files = $(DEB_UNREMOVE_FILES_$(package))
72 debian-divert/%: divert_files_all = $(strip $(divert_files) $(divert_remove_files) $(divert_undivert_files) $(divert_unremove_files))
73 debian-divert/%: divert_files_thispkg = $(strip $(divert_files) $(divert_remove_files))
74 $(patsubst %,debian-divert/%,$(DEB_DIVERT_PACKAGES)) :: debian-divert/%:
75 # Writing shell scripts in makefiles sucks. Remember to $$ shell
76 # variables and include \ at the end of each line.
77 # Add code to postinst to add/remove diversions as appropriate
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 [ "$$1" = "configure" ]; then'; \
83 $(foreach file,$(divert_undivert_files), \
84 echo " check_undivert_unlink $(call divert_files_replace_name,$(file), )"; )\
85 $(foreach file,$(divert_unremove_files), \
86 echo " check_undivert_unremove $(file) $(call remove_files_name,$(file))"; )\
87 $(foreach file,$(divert_files), \
88 echo " divert_link $(call divert_files_replace_name,$(file), )";) \
89 $(foreach file,$(divert_remove_files), \
90 mkdir -p debian/$(cdbs_curpkg)/usr/share/$(cdbs_curpkg); \
91 echo " divert_remove $(file) $(call remove_files_name,$(file))";) \
94 } >> $(CURDIR)/debian/$(cdbs_curpkg).postinst.debhelper
95 # Add code to prerm script to undo diversions when package is removed.
98 $(if $(dh_compat_6),, \
99 if [ -e $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper ]; then \
100 cat $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper; \
102 sed 's/#PACKAGE#/$(cdbs_curpkg)/g; s/#DEB_DIVERT_EXTENSION#/$(DEB_DIVERT_EXTENSION)/g' $(DEB_DIVERT_SCRIPT); \
103 $(if $(divert_files_thispkg), \
104 echo 'if [ "$$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)";) \
111 $(if $(dh_compat_6), \
112 if [ -e $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper ]; then \
113 cat $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper; \
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}
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))"; \
132 } >> $(CURDIR)/debian/$(cdbs_curpkg).substvars
134 $(patsubst %,binary-post-install/%,$(DEB_DIVERT_PACKAGES)) :: binary-post-install/%: debian-divert/%