# nullshell - do nothing but print asterisks, can be used for login shell

PREFIX	:= /usr
CP	:= cp
CC	:= gcc
MD	:= markdown
INSTALL	:= install
RM	:= rm
CFLAGS	+= -O2 -Wall -Werror
VERSION := $(shell git describe --tags --long 2>/dev/null)
# this is just a fallback in case you do not use git but downloaded
# a release tarball...
ifeq ($(VERSION),)
VERSION := 0.0.2
endif

all: nullshell README.html

nullshell: nullshell.c config.h
	$(CC) $(CFLAGS) $(LDFLAGS) nullshell.c -o nullshell \
		-DVERSION="\"$(VERSION)\""

config.h:
	$(CP) config.def.h config.h

README.html: README.md
	$(MD) README.md > README.html

install: install-bin install-doc

install-bin: nullshell
	$(INSTALL) -D -m0755 nullshell $(DESTDIR)$(PREFIX)/bin/nullshell

install-doc: README.html
	$(INSTALL) -D -m0755 README.md $(DESTDIR)$(PREFIX)/share/doc/nullshell/README.md
	$(INSTALL) -D -m0755 README.html $(DESTDIR)$(PREFIX)/share/doc/nullshell/README.html

clean:
	$(RM) -f README.html nullshell