scripts/mk/pkg-info.mk

   1 # This Makefile fragment (since dpkg 1.16.1) defines the following package
   2 # information variables:
   3 #
   4 #   DEB_SOURCE: source package name.
   5 #   DEB_VERSION: package's full version (epoch + upstream vers. + revision).
   6 #   DEB_VERSION_EPOCH_UPSTREAM: package's version without the Debian revision.
   7 #   DEB_VERSION_UPSTREAM_REVISION: package's version without the Debian epoch.
   8 #   DEB_VERSION_UPSTREAM: package's upstream version.
   9 #   DEB_DISTRIBUTION: distribution(s) listed in the current debian/changelog
  10 #     entry.
  11 #
  12 #   SOURCE_DATE_EPOCH: source release date as seconds since the epoch, as
  13 #     specified by <https://reproducible-builds.org/specs/source-date-epoch/>
  14 #     (since dpkg 1.18.8).
  15 #     If it is undefined, the date of the latest changelog entry is used.
  16 #     In both cases, the value is exported.
  17
  18 ifndef dpkg_pkg_info_mk_included
  19 dpkg_pkg_info_mk_included = yes
  20
  21 dpkg_parsechangelog_run = $(eval $(shell dpkg-parsechangelog | sed -n '\
  22   s/^Distribution: \(.*\)/$$(eval DEB_DISTRIBUTION:=\1)/p;\
  23   s/^Source: \(.*\)/$$(eval DEB_SOURCE:=\1)/p;\
  24   s/^Version: \([0-9]*:\)\?\([^-]*\)\(\(.*\)-[^-]*\)\?$$/\
  25     $$(eval DEB_VERSION:=\1\2\3)\
  26     $$(eval DEB_VERSION_EPOCH_UPSTREAM:=\1\2\4)\
  27     $$(eval DEB_VERSION_UPSTREAM_REVISION:=\2\3)\
  28     $$(eval DEB_VERSION_UPSTREAM:=\2\4)/p;\
  29   s/^Timestamp: \(.*\)/$$(eval SOURCE_DATE_EPOCH?=\1)/p'))
  30
  31 ifdef SOURCE_DATE_EPOCH
  32   dpkg_lazy_eval ?= $(eval $(1) = $(2)$$($(1)))
  33   $(call dpkg_lazy_eval,DEB_DISTRIBUTION,$$(dpkg_parsechangelog_run))
  34   $(call dpkg_lazy_eval,DEB_SOURCE,$$(dpkg_parsechangelog_run))
  35   $(call dpkg_lazy_eval,DEB_VERSION,$$(dpkg_parsechangelog_run))
  36   $(call dpkg_lazy_eval,DEB_VERSION_EPOCH_UPSTREAM,$$(dpkg_parsechangelog_run))
  37   $(call dpkg_lazy_eval,DEB_VERSION_UPSTREAM,$$(dpkg_parsechangelog_run))
  38   $(call dpkg_lazy_eval,DEB_UPSTREAM_REVISION,$$(dpkg_parsechangelog_run))
  39 else
  40   # We need to compute the values right now.
  41   $(dpkg_parsechangelog_run)
  42 endif
  43 export SOURCE_DATE_EPOCH
  44
  45 endif # dpkg_pkg_info_mk_included