# Copyright 2015-2016 Luke Shumaker <lukeshu@sbcglobal.net>.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

-include config.mk
PACKAGE = parabola-hackers
sysusersdir=$(prefix)/lib/sysusers.d
systemunitdir=$(prefix)/lib/systemd/system
conf_file = $(sysconfdir)/$(PACKAGE).yml
shadow_file = $(sysconfdir)/nshd/shadow
NET ?=
#NET ?= FORCE
user = nshd
CFLAGS += -Wall -Wextra -Werror -pedantic
CC = gcc -std=c99

MAKEFLAGS += --no-builtin-rules
topsrcdir := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))
topoutdir := $(topsrcdir)
include $(topsrcdir)/build-aux/Makefile.head.mk

CGO_CPPFLAGS = $(CPPFLAGS) -U_FORTIFY_SOURCE
CGO_CFLAGS = $(CFLAGS) -O0 -Wno-unused-parameter
CGO_ENABLED = 1

at.subdirs += go/lukeshu.com/git/go/libnslcd.git/proto

programs = nshd nshd-setuid nshd-tester common.rb
scripts = $(filter-out %.c %.o $(programs) common.rb common.rb.in,$(notdir $(wildcard $(srcdir)/bin/*)))

std.gen_files += LICENSE.lgpl-2.1.txt LICENSE.gpl-2.txt LICENSE.apache-2.0.txt
std.out_files += $(addprefix bin/,$(programs)) nshd.service nshd.sysusers
std.sys_files += $(addprefix $(bindir)/,$(programs) $(scripts)) $(systemunitdir)/nshd.socket $(systemunitdir)/nshd.service $(sysusersdir)/nshd.conf $(conf_file) $(shadow_file)
std.clean_files += bin/*.o .gopath/ .tmp* .var* $(_out)

$(srcdir)/LICENSE.lgpl-2.1.txt: $(NET)
	curl https://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt > $@
$(srcdir)/LICENSE.gpl-2.txt: $(NET)
	curl https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt > $@
$(srcdir)/LICENSE.apache-2.0.txt: $(NET)
	curl https://www.apache.org/licenses/LICENSE-2.0 > $@
$(srcdir)/LICENSE.wtfpl-2.txt: $(NET)
	curl http://www.wtfpl.net/txt/copying/ > $@

_gen += go/lukeshu.com/git/go/libnslcd.git/proto/server/interface_backend.go
_gen += go/lukeshu.com/git/go/libnslcd.git/proto/server/func_handlerequest.go
_gen += go/lukeshu.com/git/go/libnslcd.git/proto/server/type_nilbackend.go
_out += go/parabola_hackers/users.go
_out += go/parabola_hackers/passwords.go
_out += go/cmd-nshd/main.go
$(outdir)/bin/nshd: \
$(outdir)/bin/%: $(outdir)/.gopath/bin/cmd-%
	cp -T $< $@
$(outdir)/.gopath/src: $(golang.var)
	rm -rf -- $(@D)
	mkdir $(@D)
	ln -sr $(topsrcdir)/go $@
	touch $@
$(outdir)/.gopath/bin/cmd-nshd: $(patsubst $(outdir)/.gopath/src/%,go/%,$(call golang.src,$(outdir)/.gopath)) $(_gen) $(_out)
	$(call golang.install,$(topoutdir)/.gopath,cmd-nshd)

$(outdir)/%.o: $(srcdir)/%.c $(var)CC $(var)CPPFLAGS $(var)CFLAGS
	$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $(filter-out $(var)%,$^)
$(outdir)/bin/nshd-tester $(outdir)/bin/nshd-setuid: \
$(outdir)/%: $(outdir)/%.o $(var)CC $(var)LDFLAGS
	$(CC) $(LDFLAGS) -o $@ $(filter-out $(var)%,$^)

$(outdir)/%: $(srcdir)/%.in
	< $< sed $(foreach v,$(patsubst $(var)%,%,$(filter $(var)%,$^)), -e 's|@$v@|$($v)|g' ) > $@

$(outdir)/bin/nshd-setuid: -ldl
$(outdir)/nshd.service: $(var)user $(var)bindir
$(outdir)/nshd.sysusers: $(var)user
$(outdir)/bin/common.rb: $(var)conf_file
$(outdir)/go/cmd-nshd/main.go: $(var)conf_file
$(outdir)/go/parabola_hackers/users.go: $(var)bindir
$(outdir)/go/parabola_hackers/passwords.go: $(var)shadow_file

# Patterns
$(DESTDIR)$(bindir)/%: $(outdir)/bin/%
	$(NORMAL_INSTALL)
	install -TDm755 $< $@
$(DESTDIR)$(systemunitdir)/%.socket: $(outdir)/%.socket
	$(NORMAL_INSTALL)
	install -TDm644 $< $@
$(DESTDIR)$(systemunitdir)/%.service: $(outdir)/%.service
	$(NORMAL_INSTALL)
	install -TDm644 $< $@
$(DESTDIR)$(sysusersdir)/%.conf: $(outdir)/%.sysusers
	$(NORMAL_INSTALL)
	install -TDm644 $< $@

# Specific files
$(DESTDIR)$(bindir)/common.rb: $(srcdir)/bin/common.rb
	$(NORMAL_INSTALL)
	install -TDm644 $< $@
$(DESTDIR)$(conf_file): $(srcdir)/parabola-hackers.yml
	$(NORMAL_INSTALL)
	install -TDm644 $< $@
$(DESTDIR)$(shadow_file): $(var)user $(DESTDIR)$(sysusersdir)/nshd.conf
	$(NORMAL_INSTALL)
	install -d $(@D)
	touch $@
	$(POST_INSTALL)
	-systemd-sysusers
	-chown $(user):$(user) $(@D) $@

.PHONY: FORCE
.SECONDARY:
.DELETE_ON_ERROR:
include $(topsrcdir)/build-aux/Makefile.tail.mk