########################################################################

### S E T U P

########################################################################

UNAME       := $(shell uname)

DEPS_DEBUG   = libprofiler

CFLAGS       = -O2

CFLAGS_DEBUG = -DDEBUG -DPROG='"volta (debugmode)"' -ggdb -ansi -Wall

LIBS         = -lcdb

OBJS         = $(patsubst %.c,%.o,$(wildcard *.c))

.PHONY : parsegraph profile clean clobber release

########################################################################

### P L A T F O R M  T A R G E T S

########################################################################

# I hate this.  Tools like pkg-config are supposed to make finding

# libraries easy across platforms.  They only work when everyone names

# the libraries the same thing, unfortunately.  (Why name the libs with

# the version number, when pkg-config supports built in versioning??)

# And no, I'm not going to use autoconf, which just takes your build

# problems and makes a whole bunch of new baby problems for you to

# deal with.  Gaaarrgghghh.

#

# If you have problems building volta, manually pass the correct CFLAGS

# and LIBS to the 'make' command line for your platform.

#

# The following works for OSX with macports or homebrew (10.6/10.7),

# FreeBSD 8.x through 10.x, and Ubuntu 11.10 through 14.04.

# Ubuntu

#  - perftools doesn't currently register a .pc file at all

#  - lua is called 'lua5.2'

ifeq ($(UNAME), Linux)

volta: CFLAGS += -L/usr/lib -I/usr/include

volta: CFLAGS += $(shell pkg-config --cflags-only-I --libs-only-L lua5.2)

volta: LIBS   += $(shell pkg-config --libs-only-l lua5.2)

debug: CFLAGS += $(CFLAGS_DEBUG)\

	$(shell pkg-config --cflags-only-I --libs-only-L lua5.2)

debug: LIBS   += $(shell pkg-config --libs-only-l lua5.2) -lprofiler

# FreeBSD

# - lua is called 'lua-5.2'

else ifeq ($(UNAME), FreeBSD)

volta: CFLAGS += -L/usr/local/lib -I/usr/local/include

volta: CFLAGS += $(shell pkg-config --cflags-only-I --libs-only-L lua-5.2)

volta: LIBS   += $(shell pkg-config --libs-only-l lua-5.2)

debug: CFLAGS += $(CFLAGS_DEBUG)\

    $(shell pkg-config --cflags-only-I --libs-only-L lua-5.2 $(DEPS_DEBUG))

debug: LIBS += $(shell pkg-config --libs-only-l lua-5.2 $(DEPS_DEBUG))

# Darwin, everyone else (best guess?)

# - lua is called 'lua', hopefully!

else

volta: CFLAGS += $(shell pkg-config --cflags-only-I --libs-only-L lua)

volta: LIBS   += $(shell pkg-config --libs-only-l lua) 

debug: CFLAGS += $(CFLAGS_DEBUG)\

    $(shell pkg-config --cflags-only-I --libs-only-L lua $(DEPS_DEBUG))

debug: LIBS += $(shell pkg-config --libs-only-l lua $(DEPS_DEBUG))

endif

# Fix parser line number display in debug mode

ifeq (,$(findstring debug,$(MAKECMDGOALS)))

	RAGEL_FLAGS = -LCe -G2

else

	RAGEL_FLAGS = -Ces -G2

endif

# Ensure the parser is included in the objs list

# (patsubst wouldn't have found it if parser.c wasn't pre-generated.)

ifneq (parser.o,$(findstring parser.o,$(OBJS)))

	OBJS += parser.o

endif

########################################################################

### B U I L D

########################################################################

volta: $(OBJS)

	$(CC) $(CFLAGS) -o $@ $(OBJS) $(LIBS)

	strip $@

$(OBJS): volta.h

db.o: db.h

# don't actually depend on parser.rl, so distributions don't require ragel

parser.c:

	ragel $(RAGEL_FLAGS) parser.rl -o $@

debug: $(OBJS)

	$(CC) $(CFLAGS) -o volta $(OBJS) $(LIBS)

########################################################################

### U T I L

########################################################################

parsegraph: \

	request_graph.xml request_graph.pdf request_graph.dot \

	rule_graph.xml rule_graph.pdf rule_graph.dot \

	dbinput_graph.xml dbinput_graph.pdf dbinput_graph.dot \

	tld_graph.xml tld_graph.pdf tld_graph.dot

request_graph.xml request_graph.pdf request_graph.dot \

rule_graph.xml rule_graph.pdf rule_graph.dot \

dbinput_graph.xml dbinput_graph.pdf dbinput_graph.dot \

tld_graph.xml tld_graph.pdf tld_graph.dot: parser.rl

	ragel -Vp -S request_parser parser.rl > request_graph.dot

	ragel -Vp -S rule_parser parser.rl > rule_graph.dot

	ragel -Vp -S dbinput_parser parser.rl > dbinput_graph.dot

	ragel -Vp -S tld_parser parser.rl > tld_graph.dot

	ragel $(RAGEL_FLAGS) -S request_parser -x parser.rl -o request_graph.xml

	ragel $(RAGEL_FLAGS) -S rule_parser -x parser.rl -o rule_graph.xml

	ragel $(RAGEL_FLAGS) -S dbinput_parser -x parser.rl -o dbinput_graph.xml

	ragel $(RAGEL_FLAGS) -S tld_parser -x parser.rl -o tld_graph.xml

	dot -Tpdf request_graph.dot > request_graph.pdf

	dot -Tpdf rule_graph.dot > rule_graph.pdf

	dot -Tpdf dbinput_graph.dot > dbinput_graph.pdf

	dot -Tpdf tld_graph.dot > tld_graph.pdf

# export CPUPROFILE="cpu.prof" before running volta for cpu profiling

# export CPUPROFILE_FREQUENCY=100 (default)

profile:

	pprof --dot ./volta $(CPUPROFILE) | dot -Tpng > $(CPUPROFILE).png

	pprof --text ./volta $(CPUPROFILE)

tags:

	ctags *.h *.c

clobber: clean

	rm -f parser.c volta.db ChangeLog tags

clean:

	-rm -f volta *_graph.* *.o *.prof*

# requires BSD tar

release: VERSION = $(shell hg id -t | awk '{ print $$1 }')

release: clobber parser.c

	hg log --style changelog > ChangeLog

	tar -C .. --exclude misc --exclude .\* --exclude \*.rl -s '/^volta/volta-$(VERSION)/' -czvf /tmp/volta-$(VERSION).tgz volta

	mv /tmp/volta-$(VERSION).tgz .