scripts/mk/vendor.mk

   1 # This Makefile fragment (since dpkg 1.16.1) defines the following
   2 # vendor-related variables:
   3 #
   4 #   DEB_VENDOR: output of «dpkg-vendor --query Vendor».
   5 #   DEB_PARENT_VENDOR: output of «dpkg-vendor --query Parent» (can be empty).
   6 #
   7 # This Makefile fragment also defines a set of "dpkg_vendor_derives_from"
   8 # macros that can be used to verify if the current vendor derives from
   9 # another vendor. The unversioned variant defaults to the v0 version if
  10 # undefined, which can be defined explicitly to one of the versions or the
  11 # versioned macros can be used directly. The following are example usages:
  12 #
  13 # - dpkg_vendor_derives_from (since dpkg 1.16.1)
  14 #
  15 #   ifeq ($(shell $(call dpkg_vendor_derives_from,ubuntu)),yes)
  16 #     ...
  17 #   endif
  18 #
  19 # - dpkg_vendor_derives_from_v0 (since dpkg 1.19.3)
  20 #
  21 #   ifeq ($(shell $(call dpkg_vendor_derives_from_v0,ubuntu)),yes)
  22 #     ...
  23 #   endif
  24 #
  25 # - dpkg_vendor_derives_from_v1 (since dpkg 1.19.3)
  26 #
  27 #   dpkg_vendor_derives_from = $(dpkg_vendor_derives_from_v1)
  28 #   ifeq ($(call dpkg_vendor_derives_from,ubuntu),yes)
  29 #     ...
  30 #   endif
  31 #   ifeq ($(call dpkg_vendor_derives_from_v1,ubuntu),yes)
  32 #     ...
  33 #   endif
  34
  35 dpkg_late_eval ?= $(or $(value DPKG_CACHE_$(1)),$(eval DPKG_CACHE_$(1) := $(shell $(2)))$(value DPKG_CACHE_$(1)))
  36
  37 DEB_VENDOR = $(call dpkg_late_eval,DEB_VENDOR,dpkg-vendor --query Vendor)
  38 DEB_PARENT_VENDOR = $(call dpkg_late_eval,DEB_PARENT_VENDOR,dpkg-vendor --query Parent)
  39
  40 dpkg_vendor_derives_from_v0 = dpkg-vendor --derives-from $(1) && echo yes || echo no
  41 dpkg_vendor_derives_from_v1 = $(shell $(dpkg_vendor_derives_from_v0))
  42
  43 dpkg_vendor_derives_from ?= $(dpkg_vendor_derives_from_v0)