X-Git-Url: http://andersk.mit.edu/gitweb/config-package-dev.git/blobdiff_plain/02bde96f5c7da06ec30d71ad5d4666bf2dfa3bad..262d88c40b1113d0198c7fa686b0effcf8ba3d20:/divert.mk diff --git a/divert.mk b/divert.mk index 60729e5..6212abe 100644 --- a/divert.mk +++ b/divert.mk @@ -17,12 +17,25 @@ # 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)),$(package), \ @@ -35,10 +48,20 @@ ifeq ($(DEB_DIVERT_EXTENSION),) DEB_DIVERT_EXTENSION = .divert endif -DEB_DIVERT_ENCODER = /usr/share/config-package-dev/encode - +# 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/$$1$(2)/') +# Transform a full path into the path it should be diverted to if it's +# removed +remove_files_name = /usr/share/$(cdbs_curpkg)/$(shell $(DEB_DIVERT_ENCODER) $(1)) + +dh_compat_5 := $(shell if [ '$(DH_COMPAT)' -ge 5 ]; then echo y; fi) + +reverse = $(foreach n,$(shell seq $(words $(1)) -1 1),$(word $(n),$(1))) +reverse_dh_compat_5 = $(if $(dh_compat_5),$(call reverse,$(1)),$(1)) + debian-divert/%: package = $(subst debian-divert/,,$@) debian-divert/%: divert_files = $(DEB_DIVERT_FILES_$(package)) $(DEB_TRANSFORM_FILES_$(package)) debian-divert/%: divert_remove_files = $(DEB_REMOVE_FILES_$(package)) @@ -47,52 +70,65 @@ debian-divert/%: divert_unremove_files = $(DEB_UNREMOVE_FILES_$(package)) debian-divert/%: divert_files_all = $(strip $(divert_files) $(divert_remove_files) $(divert_undivert_files) $(divert_unremove_files)) debian-divert/%: divert_files_thispkg = $(strip $(divert_files) $(divert_remove_files)) $(patsubst %,debian-divert/%,$(DEB_DIVERT_PACKAGES)) :: debian-divert/%: - ( \ +# Writing shell scripts in makefiles sucks. Remember to $$ 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 [ "$$1" = "configure" ]; then'; \ $(foreach file,$(divert_undivert_files), \ - $(if $(DEB_UNDIVERT_VERSION_$(file)),,\ - echo "ERROR! Missing undivert version for $(file)!">&2; exit 1;) \ - echo -n " if [ -n \"\$$2\" ] && dpkg --compare-versions \"\$$2\" '<<' "; \ - echo "'$(DEB_UNDIVERT_VERSION_$(file))'; then"; \ - echo " undivert_unlink $(call divert_files_replace_name,$(file), )"; \ - echo " fi";) \ + echo " check_undivert_unlink $(call divert_files_replace_name,$(file), )"; )\ $(foreach file,$(divert_unremove_files), \ - $(if $(DEB_UNREMOVE_VERSION_$(file)),,\ - echo "ERROR! Missing unremove version for $(file)!">&2; exit 1;) \ - echo -n " if [ -n \"\$$2\" ] && dpkg --compare-versions \"\$$2\" '<<' "; \ - echo "'$(DEB_UNREMOVE_VERSION_$(file))'; then"; \ - echo " undivert_unremove $(file)"; \ - echo " fi";) \ + echo " check_undivert_unremove $(file) $(call remove_files_name,$(file))"; )\ $(foreach file,$(divert_files), \ echo " divert_link $(call divert_files_replace_name,$(file), )";) \ $(foreach file,$(divert_remove_files), \ - mkdir -p $(DEB_DESTDIR)/usr/share/$(cdbs_curpkg); \ - echo " divert_remove $(file) /usr/share/$(cdbs_curpkg)/`$(DEB_DIVERT_ENCODER) $(file)`";) \ + mkdir -p debian/$(cdbs_curpkg)/usr/share/$(cdbs_curpkg); \ + echo " divert_remove $(file) $(call remove_files_name,$(file))";) \ echo 'fi'; \ ) \ - ) >> $(CURDIR)/debian/$(cdbs_curpkg).postinst.debhelper - ( \ + } >> $(CURDIR)/debian/$(cdbs_curpkg).postinst.debhelper +# Add code to prerm script to undo diversions when package is removed. + set -e; \ + { \ + $(if $(dh_compat_5),, \ + if [ -e $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper ]; then \ + cat $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper; \ + fi;) \ sed 's/#PACKAGE#/$(cdbs_curpkg)/g; s/#DEB_DIVERT_EXTENSION#/$(DEB_DIVERT_EXTENSION)/g' $(DEB_DIVERT_SCRIPT); \ $(if $(divert_files_thispkg), \ echo 'if [ "$$1" = "remove" ]; then'; \ - $(foreach file,$(divert_files), \ + $(foreach file,$(call reverse_dh_compat_5,$(divert_files)), \ echo " undivert_unlink $(call divert_files_replace_name,$(file), )";) \ - $(foreach file,$(divert_remove_files), \ + $(foreach file,$(call reverse_dh_compat_5,$(divert_remove_files)), \ echo " undivert_unremove $(file) $(cdbs_curpkg)";) \ echo 'fi'; \ ) \ - ) >> $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper - ( \ + $(if $(dh_compat_5), \ + if [ -e $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper ]; then \ + cat $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper; \ + fi;) \ + } >> $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper.new + mv $(CURDIR)/debian/$(cdbs_curpkg).prerm.debhelper.new \ + $(CURDIR)/debian/$(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 "configures-"; \ + echo -n "diverts-"; \ ${DEB_DIVERT_ENCODER} "$(call divert_files_replace_name,$(file))"; \ echo -n ", ";) \ - echo \ - ) >> $(CURDIR)/debian/$(cdbs_curpkg).substvars + echo; \ + } >> $(CURDIR)/debian/$(cdbs_curpkg).substvars -$(patsubst %,binary-fixup/%,$(DEB_DIVERT_PACKAGES)) :: binary-fixup/%: debian-divert/% +$(patsubst %,binary-post-install/%,$(DEB_DIVERT_PACKAGES)) :: binary-post-install/%: debian-divert/% endif