#!/usr/bin/make -f

# resolve DEB_VERSION DEB_VERSION_UPSTREAM DEB_VERSION_UPSTREAM_REVISION
include /usr/share/dpkg/pkg-info.mk

# resolve crate version
# * get topmost version except prerelease suffix
#   from Cargo.toml file in dir passed as argument
# * source package version if matching upstream part modulo prerelease
# * otherwise append source package version
crate_version = \
 $(shell perl -n \
 -E '/version\W+\K\d+\.\d+\.\d+/ ' \
 -E 'and say "$(DEB_VERSION_UPSTREAM)" =~ /^\Q$$&\E(?:~[a-z]+\d*)?$$/ ? "$(DEB_VERSION)" : "$$&+$(DEB_VERSION_UPSTREAM_REVISION)" and exit' \
 $1/Cargo.toml)

%:
	dh $@

# declare version for virtually provided embedded crates
packages = $(patsubst %,librust-%-dev,\
 peg peg-macros peg-runtime)
override_dh_gencontrol:
	$(eval librust-peg-dev_version = $(call crate_version,.))\
	$(eval librust-peg-macros-dev_version = $(call crate_version,peg-macros))\
	$(eval librust-peg-runtime-dev_version = $(call crate_version,peg-runtime))\
	set -e; $(foreach p,$(packages),\
	 dh_gencontrol -p$p -- \
	 -v'$($p_version)' \
	 $(foreach q,$(filter-out $p,$(packages)),\
	 -V'rust:Version:$q=$($q_version)');)
	dh_gencontrol --remaining-packages