VERSION := $(shell dpkg-parsechangelog | sed -n 's/^Version: //p')

CC      ?= gcc

CFLAGS  += -Wall -Wextra -D_REENTRANT -fpic

ifeq (,$(INSTALL_PROGRAM))

    INSTALL_PROGRAM := "install"

endif

prefix	= /usr

libdir 	= $(prefix)/lib

ifneq (,$(libarch))

# The `*-*' pattern matches to both hurd-i386 and e.g. i386-linux-gnu

marchpt = /*-*

endif

bindir	= $(prefix)/bin

mandir	= $(prefix)/share/man

all compile: datefudge datefudge.so datefudge.1

install: datefudge datefudge.so datefudge.1

	install -d $(DESTDIR)$(libdir)/$(libarch)/datefudge

	$(INSTALL_PROGRAM) -o root -g root -m 644 datefudge.so $(DESTDIR)$(libdir)/$(libarch)/datefudge/datefudge.so

	install -d $(DESTDIR)$(bindir)

	$(INSTALL_PROGRAM) -o root -g root -m 755 datefudge $(DESTDIR)$(bindir)

	install -d $(DESTDIR)$(mandir)/man1

	install -o root -g root -m 644 datefudge.1 $(DESTDIR)$(mandir)/man1

datefudge: datefudge.sh

datefudge.1: datefudge.man

datefudge datefudge.1:

	sed -e 's,@VERSION@,$(VERSION),g; s,@MULTIARCH_PATTERN@,$(marchpt),g; s,@LIBDIR@,$(libdir),g;' \

	< $< > $@

datefudge.so: datefudge.o

	$(CC) $(LDFLAGS) -o $@ -shared $< -ldl -lc

datefudge.o: datefudge.c

	$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<

clean:

	rm -f datefudge.o datefudge.so datefudge datefudge.1

# The first run may possibly fail when it's around midnight, that's why it's run twice.

test: compile

	@echo -n "Running a simple date test... "                                ;\

	export TZ=UTC								 ;\

	ret1=1; ret2=1                                                           ;\

	for i in 1 2; do                                                         \

	        export DATEFUDGE=`LC_ALL=C date --date='yesterday 0:00'  +%s`   ;\

	        dt=`LC_ALL=C LD_PRELOAD=$(CURDIR)/datefudge.so date --date=12:15 +%F.%T` ;\

	        exp="1970-01-02.12:15:00"                                       ;\

	        [ "$$dt" != "$$exp" ] || { echo "OK"; ret1=0; break; }          ;\

	        echo "failed: expected: $$exp, actual: $$dt"                    ;\

	        [ $$i = 2 ] || { echo -n "   retrying... "; sleep 2; }          ;\

	done                                                                    ;\

	echo -n "Running a simple perl localtime() test... "                    ;\

	pscr='@t=localtime(time);$$t[5]+=1900;$$t[4]++;printf "%04d-%02d-%02d\n",$$t[5],$$t[4],$$t[3];';\

	for i in 1 2; do                                                         \

	        export DATEFUDGE=`LC_ALL=C date --date='yesterday 0:00'  +%s`   ;\

	        dt=`LD_PRELOAD=$(CURDIR)/datefudge.so perl -e "$$pscr"`         ;\

	        exp="1970-01-02"                                                ;\

	        [ "$$dt" != "$$exp" ] || { echo "OK"; ret2=0; break; }          ;\

	        echo "failed: expected: $$exp, actual: $$dt"                    ;\

	        [ $$i = 2 ] || { echo -n "   retrying... "; sleep 2; }          ;\

	done                                                                    ;\

	exit `expr $$ret1 + $$ret2`;