-include $(PROJ)

####### Cross-platform settings

ifneq (,$(findstring Windows,$(PATH)))
	UNAME      := Windows
	TARGET_EXT := .exe
	DEL        := del /q
	SEPERATOR  := $(subst /,\,/)
	MKDIR       = if not exist $(subst /,\,$(1)) mkdir $(subst /,\,$(1))
else
	UNAME      := $(shell uname -s)
	TARGET_EXT :=
	# LFLAGS     := -Wl,-s
	LFLAGS     := 
	DEL        := rm 
	SEPERATOR  := /
	MKDIR       = mkdir -p $(1)
endif

####### Output directory

TARGET_DIR = bin
TEMP_DIR   = build/objs
TARGET_BIN = $(TARGET_DIR)/$(TARGET)$(TARGET_EXT)
TARGET_DIR = bin
# TODO: This is a hack to put the tags file in the parent directory so
# vim can find it when looking at the toolkit code. Probably projects
# should have a project root, something like PROJECT_ROOT=
PROJECT_ROOT = ..
TAGS_FILE  = $(PROJECT_ROOT)/tags
PROJ_FILE  = $(PROJECT_ROOT)/proj

####### Compiler, tools and commands

CC         = gcc
CXX        = g++
LINK       = g++
STRIP      = strip
TAGS       = ctags

####### Command parameters

# CFLAGS     = -MMD -O0 -Wall $(DEFINES) $(INCLUDES)
CFLAGS     = -MMD -Wall $(DEFINES) $(FLAGS) $(INCLUDES)
# CXXFLAGS   = -fno-exceptions -fno-rtti $(CFLAGS)
CXXFLAGS   = $(CFLAGS)
LINKFLAGS  = $(LFLAGS)
STRIPFLAGS = -SXTnx

####### Intermediate files
INCLUDES   = $(patsubst %,-I%,$(SEARCH_PATHS))
OBJECTS    = $(patsubst %.cpp,$(TEMP_DIR)/%.o,$(filter %.cpp,$(SOURCES)))
DEPENDS    = $(patsubst %.o,%.d,$(OBJECTS))
PDFS       = $(patsubst %.md,../docs/pdfs/%.pdf,$(DOCS))

####### Build rules

all: $(TAGS_FILE) $(TARGET_BIN) $(PDFS)

.PHONY: clean targets project dependancies paths system_paths

clean:
	$(DEL) $(subst /,$(SEPERATOR),$(OBJECTS) $(DEPENDS) $(TARGET_BIN))

####### Implicit rules

-include $(DEPENDS)

.SUFFIXES: .cpp .c

$(TEMP_DIR)/%.o : %.cpp
	$(call MKDIR,$(dir $@))
	$(CXX) -c $(CXXFLAGS) -o $@ $< -MQ $@ -MQ $(TAGS_FILE) -MQ project

$(TEMP_DIR)/%.o : %.c
	$(call MKDIR,$(dir $@))
	$(CC) -c $(CFLAGS) -o $@ $< -MQ $@ -MQ $(TAGS_FILE) -MQ project

../docs/pdfs/%.pdf : ../docs/%.md
	mdpdf $< --header ../docs/tools/header.html --hHeight 55
	mv $(basename $<).pdf $@

####### Compile/Link rules

$(TARGET_BIN): $(OBJECTS)
	$(call MKDIR,$(dir $@))
	$(LINK) $(LINKFLAGS) -o $@ $^ $(LIBS)
	# $(TARGET_BIN)
	$(STRIP) $(STRIPFLAGS) $@

####### Tags/Editor rules

$(TAGS_FILE):
	@echo "Rebuilding tags"
	cscope -ub $^
	$(TAGS) -f $@ --tag-relative=yes --sort=yes --c++-kinds=+p --fields=+iaS --extras=+q $^

$(PROJ_FILE):
	@$(MAKE) project > $@

define item_svn_status
  $(eval TMP := $(word 1,$(subst _, ,$(filter %$(abspath $F),$(SVN_ST)))))$(if $(TMP),$(TMP), )
endef

define generate_tree_items
	@printf '$(2)'
	$(eval ITEMS := $(3))
	$(eval LAST := $(if $(ITEMS),$(word $(words $(ITEMS)), $(ITEMS)),))
	@printf '$(foreach F, $(ITEMS),\n$(1) $(if $(filter $F,$(LAST)),┗━,┣━)$(call item_svn_status) $(notdir $F)\t\t\t\t\t\t\t $(abspath $F))\n'
endef

project:
	$(eval SVN_ST := $(shell svn st `svn info --show-item wc-root` | tr ' ' '_'))
	$(call generate_tree_items,┃ ,┣━ Target,      $(TARGET))
	$(call generate_tree_items,┃ ,┃\n┣━ Sources,  $(filter %.cpp,$^))
	$(call generate_tree_items,┃ ,┃\n┣━ Includes, $(filter   %.h,$^))
	$(call generate_tree_items,┃ ,┃\n┣━ Docs,     $(filter  %.md,$(DOCS)))
	$(call generate_tree_items,  ,┃\n┗━ Project,  $(filter-out %.d,$(MAKEFILE_LIST)))

paths:
	@printf '$(SEARCH_PATHS)'

system_paths:
	@g++ -E -xc++ -v /dev/null 2>&1 | grep "^ /" | sed 's/\(.*\) (framework directory)/\1/g' | tr -d '\n'

dependancies:
	@$(MAKE) project | sed -n 's/.* \(.*\)/\1/gp'

targets:
	@$(MAKE) -p $(PROJ_FILE) | sed -n 's/^\([a-zA-Z0-9]*\):.*/\1/gp'