DMD=dmd
DMD_FLAGS=-de -w
DMD_FLAGS_RELEASE=-release
DMD_FLAG_BINOF=-of

LDC=ldc2
LDC_FLAGS=-w
LDC_FLAGS_RELEASE=-release
LDC_FLAG_BINOF=-of=

GDC=gdc
#GDC=gdc-5
GDC_FLAGS=
GDC_FLAGS_RELEASE=-frelease
GDC_FLAG_BINOF=-o

# set D_COMPILER one of DMD LDC or GDC:
D_COMPILER=LDC

SET_DC_FLAGS_DEBUG=-unittest -debug=checkdoc -debug=summary
SET_DC_FLAGS_DEBUG_EXTRA=-debug=headings -debug=bookindex

DC=$($(D_COMPILER))
DC_FLAGS=$($(shell echo $(D_COMPILER)_FLAGS))
DC_FLAGS_RELEASE=$($(shell echo $(D_COMPILER)_FLAGS_RELEASE))
DC_FLAG_BINOF=$($(shell echo $(D_COMPILER)_FLAG_BINOF))

ifeq ($(DC), $(DMD))
	DC_FLAGS_DEBUG :=$(shell echo $(SET_DC_FLAGS_DEBUG))
	DC_FLAGS_DEBUG_EXTRA :=$(shell echo $(SET_DC_FLAGS_DEBUG_EXTRA))
endif
ifeq ($(DC) ,$(LDC))
	DC_FLAGS_DEBUG :=$(shell echo $(SET_DC_FLAGS_DEBUG)| sed -e "s/-debug=/-d-debug=/g")
	DC_FLAGS_DEBUG_EXTRA :=$(shell echo $(SET_DC_FLAGS_DEBUG_EXTRA)| sed -e "s/-debug=/-d-debug=/g")
endif
ifeq ($(DC), $(GDC))
	DC_FLAGS_DEBUG :=$(shell echo $(SET_DC_FLAGS_DEBUG)| sed -e "s/-debug/-fdebug/g")
	DC_FLAGS_DEBUG_EXTRA :=$(shell echo $(SET_DC_FLAGS_DEBUG_EXTRA)| sed -e "s/-debug/-fdebug/g")
endif

PRG_NAME=sdp
PRG_SRC=$(PRG_NAME).d
PRG_SRCDIR=./lib/$(PRG_NAME)
PRG_BIN=$(PRG_NAME)
PRG_BINDIR=bin

# ORG
EMACSLISP=/usr/share/emacs/site-lisp
EMACSLISP_ORG=~/.emacs.d/elpa/org-20151005
EMACSLISP_ORG_CONTRIB=~/.emacs.d/elpa/org-plus-contrib-20151005
ORGFILELIST=$(shell echo `ls -1 maker.org org/*.org`)
ORGFILES=""
ORGDIR=$(shell echo `pwd`)

all: build

build: $(PRG_SRCDIR)/$(PRG_SRC)
	$(DC) $(DC_FLAGS) \
	$(DC_FLAG_BINOF)$(PRG_BINDIR)/$(PRG_BIN) \
	$(PRG_SRCDIR)/$(PRG_SRC)

rebuild: $(PRG_SRCDIR)/$(PRG_SRC) $(PRG_BINDIR)/$(PRG_BIN).o clean build

debug: $(PRG_SRCDIR)/$(PRG_SRC)
	$(DC) $(DC_FLAGS) $(DC_FLAGS_DEBUG) $(DC_FLAGS_DEBUG_EXTRA) \
	$(DC_FLAG_BINOF)$(PRG_BINDIR)/$(PRG_BIN) \
	$(PRG_SRCDIR)/$(PRG_SRC)

debug_dmd: $(PRG_SRCDIR)/$(PRG_SRC)
	$(DMD) $(DMD_FLAGS) $(DMD_FLAGS_DEBUG) $(DC_FLAGS_DEBUG_EXTRA) \
	$(DMD_FLAG_BINOF)$(PRG_BINDIR)/$(PRG_BIN) \
	$(PRG_SRCDIR)/$(PRG_SRC)

debug_ldc: $(PRG_SRCDIR)/$(PRG_SRC)
	$(LDC) $(LDC_FLAGS) $(LDC_FLAGS_DEBUG) $(DC_FLAGS_DEBUG_EXTRA) \
	$(LDC_FLAG_BINOF)$(PRG_BINDIR)/$(PRG_BIN) \
	$(PRG_SRCDIR)/$(PRG_SRC)

debug_gdc: $(PRG_SRCDIR)/$(PRG_SRC)
	$(GDC) $(GDC_FLAGS) $(GDC_FLAGS_DEBUG) $(DC_FLAGS_DEBUG_EXTRA) \
	$(GDC_FLAG_BINOF)$(PRG_BINDIR)/$(PRG_BIN) \
	$(PRG_SRCDIR)/$(PRG_SRC)

release: distclean_and_init tangle $(PRG_SRCDIR)/$(PRG_SRC)
	$(DC) $(DC_FLAGS) $(DC_FLAGS_RELEASE) \
	$(DC_FLAG_BINOF)$(PRG_BINDIR)/$(PRG_BIN) \
	$(PRG_SRCDIR)/$(PRG_SRC)

init:
	mkdir -p $(PRG_SRCDIR); \
	mkdir -p $(PRG_BINDIR);

clean: $(PRG_BINDIR)/$(PRG_BIN).o
	rm $(PRG_BINDIR)/$(PRG_NAME).o

expunge: init $(PRG_BINDIR)
	rm -rf $(PRG_BINDIR); \
	rm -rf $(PRG_SRCDIR);

distclean: init $(PRG_BINDIR) expunge

distclean_and_init: init $(PRG_BINDIR) expunge
	mkdir -p $(PRG_SRCDIR); \
	mkdir -p $(PRG_BINDIR);

tangle:
	for f in $(ORGFILELIST); do \
		ORGFILES="$$ORGFILES \"$$f\""; \
	done; \
	emacs --batch -Q -q \
	--eval "(progn \
		(add-to-list 'load-path \
			(expand-file-name \"$(EMACSLISP)\")) \
		(add-to-list 'load-path \
			(expand-file-name \"$(EMACSLISP_ORG)\" t)) \
		(add-to-list 'load-path \
			(expand-file-name \"$(EMACSLISP_ORG_CONTRIB)\" t)) \
		(require 'org)(require 'ob)(require 'ob-tangle) \
		(mapc (lambda (file) \
			(find-file (expand-file-name file \"$(ORGDIR)\")) \
		    (setq-local org-src-preserve-indentation t) \
			(org-babel-tangle) \
			(kill-buffer)) '($$ORGFILES)))" 2>&1

gitsnapshot: distclean_and_init tangle
	git commit -a

.PHONY : all build rebuild debug release \
	clean distclean init \
	tangle