TOPDIR=$(shell pwd)

include $(TOPDIR)/common.mk

# Depend on the object files of all source-files in src/*.c and on all header files
AUTOGENERATED:=src/cfgparse.tab.c src/cfgparse.yy.c
FILES:=$(filter-out $(AUTOGENERATED),$(wildcard src/*.c))
FILES:=$(FILES:.c=.o)
HEADERS:=$(filter-out include/loglevels.h,$(wildcard include/*.h))
CMDPARSE_HEADERS:=include/GENERATED_call.h include/GENERATED_enums.h include/GENERATED_tokens.h

# Recursively generate loglevels.h by explicitly calling make
# We need this step because we need to ensure that loglevels.h will be
# updated if necessary, but we also want to save rebuilds of the object
# files, so we cannot let the object files depend on loglevels.h.
ifeq ($(MAKECMDGOALS),loglevels.h)
#UNUSED:=$(warning Generating loglevels.h)
else
UNUSED:=$(shell $(MAKE) loglevels.h)
endif

SUBDIRS:=i3-msg i3-input i3-nagbar i3-config-wizard i3bar i3-dump-log

# Depend on the specific file (.c for each .o) and on all headers
src/%.o: src/%.c ${HEADERS}
	echo "[i3] CC $<"
	$(CC) $(CPPFLAGS) $(CFLAGS) -DLOGLEVEL="((uint64_t)1 << $(shell awk '/$(shell basename $< .c)/ { print NR; exit 0; }' loglevels.tmp))" -c -o $@ $<

all: i3 subdirs

i3: libi3/libi3.a src/cfgparse.y.o src/cfgparse.yy.o ${FILES}
	echo "[i3] LINK i3"
	$(CC) $(LDFLAGS) -o $@ $(filter-out libi3/libi3.a,$^) $(LIBS)

libi3/%.a: libi3/*.c
	$(MAKE) -C libi3

subdirs:
	for dir in $(SUBDIRS); do \
		echo ""; \
		echo "MAKE $$dir"; \
		$(MAKE) -C $$dir; \
	done

loglevels.h:
	echo "[i3] LOGLEVELS"
	for file in $$(ls src/*.c src/*.y src/*.l | grep -v 'cfgparse.\(tab\|yy\).c'); \
	do \
		echo $$(basename $$file .c); \
	done > loglevels.tmp
	(echo "char *loglevels[] = {"; for file in $$(cat loglevels.tmp); \
	do \
		echo "\"$$file\", "; \
	done; \
	echo "};") > include/loglevels.h;

# The GENERATED_* files are actually all created from a single pass, so all
# files just depend on the first one.
include/GENERATED_call.h: generate-command-parser.pl parser-specs/commands.spec
	echo "[i3] Generating command parser"
	(cd include; ../generate-command-parser.pl)
include/GENERATED_enums.h: include/GENERATED_call.h
include/GENERATED_tokens.h: include/GENERATED_call.h

# This target compiles the command parser twice:
# Once with -DTEST_PARSER, creating a stand-alone executable used for tests,
# and once as an object file for i3.
src/commands_parser.o: src/commands_parser.c ${HEADERS} ${CMDPARSE_HEADERS}
	echo "[i3] CC $<"
	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -DTEST_PARSER -DLOGLEVEL="((uint64_t)1 << $(shell awk '/$(shell basename $< .c)/ { print NR; exit 0; }' loglevels.tmp))" -o test.commands_parser $< $(LIBS)
	$(CC) $(CPPFLAGS) $(CFLAGS) -DLOGLEVEL="((uint64_t)1 << $(shell awk '/$(shell basename $< .c)/ { print NR; exit 0; }' loglevels.tmp))" -c -o $@ $<

src/cfgparse.yy.o: src/cfgparse.l src/cfgparse.y.o ${HEADERS}
	echo "[i3] LEX $<"
	$(FLEX) -i -o$(@:.o=.c) $<
	$(CC) $(CPPFLAGS) $(CFLAGS) -DLOGLEVEL="(1 << $(shell awk '/cfgparse.l/ { print NR }' loglevels.tmp))" -c -o $@ $(@:.o=.c)


src/cfgparse.y.o: src/cfgparse.y ${HEADERS}
	echo "[i3] YACC $<"
	$(BISON) --debug --verbose -b $(basename $< .y) -d $<
	$(CC) $(CPPFLAGS) $(CFLAGS) -DLOGLEVEL="(1 << $(shell awk '/cfgparse.y/ { print NR }' loglevels.tmp))" -c -o $@ $(<:.y=.tab.c)


install: all
	echo "[i3] INSTALL"
	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/bin
	$(INSTALL) -d -m 0755 $(DESTDIR)$(SYSCONFDIR)/i3
	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/include/i3
	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/share/xsessions
	$(INSTALL) -d -m 0755 $(DESTDIR)$(PREFIX)/share/applications
	$(INSTALL) -m 0755 i3 $(DESTDIR)$(PREFIX)/bin/
	$(INSTALL) -m 0755 i3-migrate-config-to-v4 $(DESTDIR)$(PREFIX)/bin/
	$(INSTALL) -m 0755 i3-sensible-editor $(DESTDIR)$(PREFIX)/bin/
	$(INSTALL) -m 0755 i3-sensible-pager $(DESTDIR)$(PREFIX)/bin/
	$(INSTALL) -m 0755 i3-sensible-terminal $(DESTDIR)$(PREFIX)/bin/
	test -e $(DESTDIR)$(SYSCONFDIR)/i3/config || $(INSTALL) -m 0644 i3.config $(DESTDIR)$(SYSCONFDIR)/i3/config
	test -e $(DESTDIR)$(SYSCONFDIR)/i3/config.keycodes || $(INSTALL) -m 0644 i3.config.keycodes $(DESTDIR)$(SYSCONFDIR)/i3/config.keycodes
	$(INSTALL) -m 0644 i3.welcome $(DESTDIR)$(SYSCONFDIR)/i3/welcome
	$(INSTALL) -m 0644 i3.xsession.desktop $(DESTDIR)$(PREFIX)/share/xsessions/i3.desktop
	$(INSTALL) -m 0644 i3.applications.desktop $(DESTDIR)$(PREFIX)/share/applications/i3.desktop
	$(INSTALL) -m 0644 include/i3/ipc.h $(DESTDIR)$(PREFIX)/include/i3/
	for dir in $(SUBDIRS); do \
		$(MAKE) -C $$dir install; \
	done

dist: distclean
	[ ! -d i3-${VERSION} ] || rm -rf i3-${VERSION}
	[ ! -e i3-${VERSION}.tar.bz2 ] || rm i3-${VERSION}.tar.bz2
	mkdir i3-${VERSION}
	cp i3-migrate-config-to-v4 generate-command-parser.pl i3-sensible-* i3.config.keycodes DEPENDS LICENSE PACKAGE-MAINTAINER RELEASE-NOTES-${VERSION} i3.config i3.xsession.desktop i3.applications.desktop pseudo-doc.doxygen Makefile i3-${VERSION}
	cp -r src libi3 i3-msg i3-nagbar i3-config-wizard i3bar i3-dump-log yajl-fallback include man parser-specs i3-${VERSION}
	# Only copy toplevel documentation (important stuff)
	mkdir i3-${VERSION}/docs
	# Pre-generate documentation
	$(MAKE) -C docs
	$(MAKE) -C i3bar/doc
	# Cleanup τεχ output files
	find docs -regex ".*\.\(aux\|out\|log\|toc\|bm\|dvi\|log\)" -exec rm '{}' \;
	find docs -maxdepth 1 -type f ! \( -name "*.xcf" -or -name "*.svg" \) -exec cp '{}' i3-${VERSION}/docs \;
	# Only copy source code from i3-input
	mkdir i3-${VERSION}/i3-input
	find i3-input -maxdepth 1 -type f \( -name "*.c" -or -name "*.h" -or -name "Makefile" \) -exec cp '{}' i3-${VERSION}/i3-input \;
	sed -e 's/^GIT_VERSION:=\(.*\)/GIT_VERSION:=$(shell /bin/echo '${GIT_VERSION}' | sed 's/\\/\\\\/g')/g;s/^VERSION:=\(.*\)/VERSION:=${VERSION}/g' common.mk > i3-${VERSION}/common.mk
	# Pre-generate a manpage to allow distributors to skip this step and save some dependencies
	$(MAKE) -C man
	cp man/*.1 i3-${VERSION}/man/
	cp i3bar/doc/*.1 i3-${VERSION}/i3bar/doc/
	tar cfj i3-${VERSION}.tar.bz2 i3-${VERSION}
	rm -rf i3-${VERSION}

clean:
	rm -f src/*.o src/*.gcno src/cmdparse.* src/cfgparse.tab.{c,h} src/cfgparse.yy.c src/cfgparse.{output,dot} loglevels.tmp include/loglevels.h include/GENERATED_*
	(which lcov >/dev/null 2>&1 && lcov -d . --zerocounters) || true
	$(MAKE) -C libi3 clean
	$(MAKE) -C docs clean
	$(MAKE) -C man clean
	for dir in $(SUBDIRS); do \
		echo ""; \
		echo "CLEAN $$dir"; \
		$(MAKE) TOPDIR=$(TOPDIR) -C $$dir distclean; \
	done

distclean: clean
	rm -f i3
	for dir in $(SUBDIRS); do \
		echo ""; \
		echo "DISTCLEAN $$dir"; \
		$(MAKE) TOPDIR=$(TOPDIR) -C $$dir distclean; \
	done

coverage:
	rm -f /tmp/i3-coverage.info
	rm -rf /tmp/i3-coverage
	lcov -d . -b . --capture -o /tmp/i3-coverage.info
	genhtml -o /tmp/i3-coverage/ /tmp/i3-coverage.info