# SPDX-License-Identifier: BSD-3-Clause
# @configure_input@

MAKEFLAGS += -R -r

UNITY = @UNITY@
srcdir = @srcdir@
abs_builddir = @abs_builddir@
prefix = @prefix@
exec_prefix = @exec_prefix@
datarootdir = @datarootdir@
sbindir = @sbindir@
sysconfdir = @sysconfdir@
localstatedir = @localstatedir@
mandir = @mandir@
systemdsystemunitdir = @SYSTEMDSYSTEMUNITDIR@
default_seed_dir = @DEFAULT_SEED_DIR@

CC = @CC@
CFLAGS = @CFLAGS@
override CFLAGS += -UNDEBUG -I$(abs_builddir)
CPPFLAGS = @CPPFLAGS@
LDFLAGS = @LDFLAGS@
LIBS = @LIBS@

VPATH := $(srcdir)
SRC := src/id.c src/load.c src/main.c src/random-seed.c src/save.c src/sha2.c src/util.c
OBJ := $(SRC:.c=.o)
DEP := $(SRC:.c=.d)
TEST_FILE := random-seed.test

all: random-seed systemd/random-seed.service systemd/random-seed-save.service

$(srcdir)/configure: $(srcdir)/aclocal.m4 $(srcdir)/autogen.sh $(srcdir)/configure.ac
	cd $(srcdir); ./autogen.sh

config.status: $(srcdir)/configure
	$(SHELL) ./config.status --recheck

Makefile: config.status Makefile.in
	./config.status

config.h: config.status config.h.in
	./config.status

ifneq ($(UNITY),)
random-seed: random-seed.o
	$(CC) $(LDFLAGS) $^ $(LIBS) -o $@

random-seed.o: CPPFLAGS+=-I$(srcdir)/src

random-seed.c: Makefile
	for f in $(SRC); do \
	    printf '#include "%s"\n' "$$f"; \
	done > $@

-include random-seed.d
else
random-seed: $(OBJ)
	$(CC) $(LDFLAGS) $^ $(LIBS) -o $@

-include $(DEP)
endif

%.o: %.c
	@mkdir -p $(@D)
	$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<

systemd/random-seed.service systemd/random-seed-save.service: Makefile
	@mkdir -p $(@D)
	sed -e 's|@sbindir[@]|$(sbindir)|g' \
	    -e 's|@default_seed_dir[@]|$(default_seed_dir)|g' \
	    $(srcdir)/$@.in > $@

systemd/random-seed.service: systemd/random-seed.service.in
systemd/random-seed-save.service: systemd/random-seed-save.service.in

install: all
	install -D -m755 random-seed $(DESTDIR)$(sbindir)/random-seed
	install -D -m644 $(srcdir)/doc/random-seed.8 $(DESTDIR)$(mandir)/man8/random-seed.8
ifneq ($(systemdsystemunitdir),)
	install -D -m644 systemd/random-seed.service $(DESTDIR)$(systemdsystemunitdir)/random-seed.service
	install -D -m644 systemd/random-seed-save.service $(DESTDIR)$(systemdsystemunitdir)/random-seed-save.service
	install -D -m644 $(srcdir)/systemd/random-seed-save.timer $(DESTDIR)$(systemdsystemunitdir)/random-seed-save.timer
endif

test: $(TEST_FILE)

$(TEST_FILE): random-seed
	$(TEST_WRAPPER) ./random-seed save $(TEST_FILE)
	$(TEST_WRAPPER) ./random-seed load $(TEST_FILE) || [ $$? = 15 ]

clean:
	rm -f random-seed random-seed.c random-seed.d random-seed.o systemd/random-seed.service systemd/random-seed-save.service $(OBJ) $(DEP) $(TEST_FILE)
	rmdir systemd 2>/dev/null || true

.PHONY: all install test clean random-seed.test
.INTERMEDIATE: $(TEST_FILE)