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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 | ||
28 | ifndef _cdbs_rules_divert | |
29 | _cdbs_rules_divert = 1 | |
30 | ||
31 | include /usr/share/cdbs/1/rules/debhelper.mk | |
32 | ||
33 | CDBS_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. | |
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 | |
39 | # package name. | |
40 | DEB_DIVERT_ENCODER = /usr/share/config-package-dev/encode | |
41 | ||
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)),$(package))))))) | |
48 | ||
49 | ifeq ($(DEB_DIVERT_EXTENSION),) | |
50 | DEB_DIVERT_EXTENSION = .divert | |
51 | endif | |
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 | |
56 | divert_files_replace_name = $(shell echo $(1) | perl -pe 's/(.*)\Q$(DEB_DIVERT_EXTENSION)\E/$$1$(2)/') | |
57 | ||
58 | # Encode a full path into the path it should be diverted to if it's | |
59 | # removed | |
60 | remove_files_name = /usr/share/$(cdbs_curpkg)/$(shell $(DEB_DIVERT_ENCODER) $(1)) | |
61 | ||
62 | dh_compat_6 := $(shell if [ '$(DH_COMPAT)' -ge 6 ]; then echo y; fi) | |
63 | ||
64 | reverse = $(foreach n,$(shell seq $(words $(1)) -1 1),$(word $(n),$(1))) | |
65 | reverse_dh_compat_6 = $(if $(dh_compat_6),$(call reverse,$(1)),$(1)) | |
66 | ||
67 | debian-divert/%: package = $(subst debian-divert/,,$@) | |
68 | debian-divert/%: divert_files = $(DEB_DIVERT_FILES_$(package)) $(DEB_TRANSFORM_FILES_$(package)) | |
69 | debian-divert/%: divert_remove_files = $(DEB_REMOVE_FILES_$(package)) | |
70 | debian-divert/%: divert_undivert_files = $(DEB_UNDIVERT_FILES_$(package)) | |
71 | debian-divert/%: divert_unremove_files = $(DEB_UNREMOVE_FILES_$(package)) | |
72 | debian-divert/%: divert_files_all = $(strip $(divert_files) $(divert_remove_files) $(divert_undivert_files) $(divert_unremove_files)) | |
73 | debian-divert/%: divert_files_thispkg = $(strip $(divert_files) $(divert_remove_files)) | |
74 | $(patsubst %,debian-divert/%,$(DEB_DIVERT_PACKAGES)) :: debian-divert/%: | |
75 | # Writing shell scripts in makefiles sucks. Remember to $$ shell | |
76 | # variables and include \ at the end of each line. | |
77 | # Add code to postinst to add/remove diversions as appropriate | |
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 | ||
136 | endif |