#
# Btrbk is a single perl script, and does not require any special
# installation procedures or libraries. There is no need to run the
# "all" build target if you don't want to build the man pages (see
# doc/Makefile).
#
# Note: systemd units (file names) are hardcoded in "install-systemd"
# build target for simplicity.
#

BIN         = btrbk
BIN_LINKS   = lsbtr
CONFIGS     = btrbk.conf.example
DOCS        = ChangeLog \
              README.md
SCRIPTS     = ssh_filter_btrbk.sh \
              contrib/cron/btrbk-mail \
              contrib/cron/btrbk-verify \
              contrib/migration/raw_suffix2sidecar \
              contrib/crypt/kdf_pbkdf2.py \
              contrib/tools/btrbk_restore_raw.py

PN          = btrbk
PREFIX     ?= /usr
CONFDIR     = /etc
CRONDIR     = /etc/cron.daily
BINDIR      = $(PREFIX)/bin
DOCDIR      = $(PREFIX)/share/doc/$(PN)
SCRIPTDIR   = $(PREFIX)/share/$(PN)/scripts
SYSTEMDDIR  = $(PREFIX)/lib/systemd/system
BASHCOMPDIR = $(PREFIX)/share/bash-completion/completions
MAN1DIR     = $(PREFIX)/share/man/man1
MAN5DIR     = $(PREFIX)/share/man/man5

ifeq ($(COMPRESS), yes)
  DOCS := $(addsuffix .gz,$(DOCS))
endif

replace_vars = sed \
	-e "s|@PN@|$(PN)|g" \
	-e "s|@CONFDIR@|$(CONFDIR)|g" \
	-e "s|@CRONDIR@|$(CRONDIR)|g" \
	-e "s|@BINDIR@|$(BINDIR)|g" \
	-e "s|@DOCDIR@|$(DOCDIR)|g" \
	-e "s|@SCRIPTDIR@|$(SCRIPTDIR)|g" \
	-e "s|@SYSTEMDDIR@|$(SYSTEMDDIR)|g" \
	-e "s|@BASHCOMPDIR@|$(BASHCOMPDIR)|g" \
	-e "s|@MAN1DIR@|$(MAN1DIR)|g" \
	-e "s|@MAN5DIR@|$(MAN5DIR)|g"

all: man

install: install-bin install-bin-links install-etc install-completion install-systemd install-share install-man install-doc

install-bin:
	@echo 'installing binary...'
	install -d -m 755 "$(DESTDIR)$(BINDIR)"
	install -p -m 755 $(BIN) "$(DESTDIR)$(BINDIR)"

install-bin-links: install-bin
	@echo 'installing symlinks...'
	for name in $(BIN_LINKS); do \
		ln -s -n -f $(BIN) "$(DESTDIR)$(BINDIR)/$$name"; \
	done

install-etc:
	@echo 'installing example configs...'
	install -d -m 755 "$(DESTDIR)$(CONFDIR)/btrbk"
	install -p -m 644 $(CONFIGS) "$(DESTDIR)$(CONFDIR)/btrbk"

install-completion:
	@echo 'installing bash completion...'
	install -d -m 755 "$(DESTDIR)$(BASHCOMPDIR)"
	install -p -m 644 contrib/bash/completion.bash "$(DESTDIR)$(BASHCOMPDIR)/$(BIN)"
	for name in $(BIN_LINKS); do \
		ln -s -n -f $(BIN) "$(DESTDIR)$(BASHCOMPDIR)/$$name"; \
	done

install-systemd:
	@echo 'installing systemd service units...'
	install -d -m 755 "$(DESTDIR)$(SYSTEMDDIR)"
	$(replace_vars) contrib/systemd/btrbk.service.in > contrib/systemd/btrbk.service.tmp
	$(replace_vars) contrib/systemd/btrbk.timer.in > contrib/systemd/btrbk.timer.tmp
	install -p -m 644 contrib/systemd/btrbk.service.tmp "$(DESTDIR)$(SYSTEMDDIR)/btrbk.service"
	install -p -m 644 contrib/systemd/btrbk.timer.tmp "$(DESTDIR)$(SYSTEMDDIR)/btrbk.timer"
	rm contrib/systemd/btrbk.service.tmp
	rm contrib/systemd/btrbk.timer.tmp

install-share:
	@echo 'installing auxiliary scripts...'
	install -d -m 755 "$(DESTDIR)$(SCRIPTDIR)"
	install -p -m 755 $(SCRIPTS) "$(DESTDIR)$(SCRIPTDIR)"

install-man: man
	@echo 'installing man pages...'
	@$(MAKE) -C doc install-man

install-doc: $(DOCS)
	@echo 'installing documentation...'
	install -d -m 755 "$(DESTDIR)$(DOCDIR)"
	install -p -m 644 $(DOCS) "$(DESTDIR)$(DOCDIR)"
	@$(MAKE) -C doc install-doc

man:
	@echo 'generating manpages...'
	@$(MAKE) -C doc man

clean:
	rm -f *.gz
	@$(MAKE) -C doc clean

%.gz : %
	gzip -9 -n -c $< > $@