#!/usr/bin/make -f

export DH_VERBOSE = 1

# The glibc the Nix toolchain builds against, and so the real floor for the
# binaries. dpkg-shlibdeps would instead derive libc6 (>= 2.34) from the build
# host's symbols file, where sysconf carries that minver, locking out distros
# the binaries actually run on.
LIBC_MIN = 2.31

# The binary package's name, which a variant build changes to e.g. xrpld-assert,
# and the directory debhelper expects its files staged in.
PKG := $(firstword $(shell dh_listpackages))
PKG_DIR = debian/$(PKG)

# The base name, which every package ships under whatever it is called itself.
BASE_NAME = xrpld

# What build_pkg.py stages beside this directory, each installed under its own
# name. The binaries are also the ones checked against LIBC_MIN below.
BINARIES = $(BASE_NAME) validator-keys
CONFIGS = $(BASE_NAME).cfg validators.txt

%:
	dh $@

override_dh_auto_configure override_dh_auto_build override_dh_auto_test:
	@:

# The unit, sysusers, tmpfiles and logrotate files are named after the daemon
# rather than after the package, so a variant still ships xrpld.service and
# /etc/logrotate.d/xrpld. debhelper only reads debian/$(PKG).$(BASE_NAME).* when told
# the name.
override_dh_installsystemd:
	dh_installsystemd --no-stop-on-upgrade --name $(BASE_NAME)

# The tmpfiles snippet sets ownership to the xrpld user, so the sysusers snippet
# has to be emitted first: run it early and make its own sequence slot a no-op.
execute_before_dh_installtmpfiles:
	dh_installsysusers --name $(BASE_NAME)

override_dh_installsysusers:

override_dh_installtmpfiles:
	dh_installtmpfiles --name $(BASE_NAME)

override_dh_installlogrotate:
	dh_installlogrotate --name $(BASE_NAME)

override_dh_install:
	for binary in $(BINARIES); do \
		install -D -m 0755 "$$binary" "$(PKG_DIR)/usr/bin/$$binary"; \
	done
	for config in $(CONFIGS); do \
		install -D -m 0644 "$$config" "$(PKG_DIR)/etc/$(BASE_NAME)/$$config"; \
	done

override_dh_shlibdeps:
	dh_shlibdeps
	# Guards against the toolchain moving past LIBC_MIN and the packages then
	# claiming a floor they do not meet.
	for binary in $(BINARIES); do \
		needed=$$(readelf --dyn-syms --wide $$binary \
			| grep -o 'GLIBC_[0-9.]*' | sed 's/GLIBC_//' | sort -uV | tail -1); \
		if [ -z "$$needed" ]; then \
			echo "$$binary: no GLIBC_ symbol versions read, cannot check LIBC_MIN" >&2; \
			exit 1; \
		fi; \
		if dpkg --compare-versions "$$needed" gt "$(LIBC_MIN)"; then \
			echo "$$binary needs glibc $$needed, above LIBC_MIN $(LIBC_MIN)" >&2; \
			exit 1; \
		fi; \
	done
	sed -i 's/libc6 (>= [0-9.]*)/libc6 (>= $(LIBC_MIN))/' debian/$(PKG).substvars

override_dh_dwz:
	@: