# To be included in other Makefile

# This Makefile converts all XML files found in the current directory
# to HTML file under www directory and copies there the referenced
# files such as images or hyperlinked files.

ifndef BASEDIR
BASEDIR := $(shell ( old_pwd="" ;  while [ ! -e xsl/course.xsl ] ; do if [ "$$old_pwd" = `pwd`  ] ; then exit 1 ; else old_pwd=`pwd` ; cd -L .. 2>/dev/null ; fi ; done ; pwd ) )
endif
export BASEDIR

# RELATIVEDIR: relative path from BASEDIR to the current directory
RELATIVEDIR=$(patsubst /%,%,$(patsubst $(BASEDIR)%,%,$(shell pwd -L)))

# BACK_TO_BASE: relative path from the current directory to BASEDIR
BACK_TO_BASE:=$(shell echo $(RELATIVEDIR)|sed -e 's/[^/]\+/../g')
ifeq ($(BACK_TO_BASE),)
BACK_TO_BASE=.
endif

# $(info BASEDIR=$(BASEDIR))
# $(info RELATIVEDIR=$(RELATIVEDIR))
# $(info BACK_TO_BASE=$(BACK_TO_BASE))

TARGETDIR:=$(BASEDIR)/www/$(RELATIVEDIR)

.PHONY: all clean local subdirs copy-links

Q=$(if $(V),,@)

all: default

clean:
	rm -rf $(TARGETDIR)/*

ifdef SUBDIRS
subdirs:
	$(Q)$(foreach d,$(SUBDIRS),$(MAKE) -C $(d) &&) true
endif


WWW_ROOT ?= $(BACK_TO_BASE)
WWW_ROOT := $(WWW_ROOT:%/=%)

ifndef XMLS
XMLS := $(wildcard *.xml)
endif
htmls := $(if $(word 2,$(XMLS)),$(XMLS:%.xml=%.html),index.html)

default: subdirs
default: $(htmls:%=$(TARGETDIR)/%)
default: copy-links

ifeq ($(words $(XMLS)),1)
$(TARGETDIR)/$(htmls): $(XMLS)
else
$(TARGETDIR)/%.html: %.xml
endif
	$(Q)mkdir -p $(dir $@)
	$(Q)echo "  XSLTPROC $(RELATIVEDIR:%=%/)$(notdir $@)"
	$(Q)xsltproc --stringparam www.root "$(WWW_ROOT)" $(XSLTPROCFLAGS) $(BASEDIR)/xsl/course.xsl $< > "$@"
ifdef SHOW_HTML_PATH
	$(Q)echo "$@"		# Used by XXE macro to display the compiled page
endif


links.mk: $(XMLS:%.xml=%.links)
	$(Q)echo 'docbook_links = $(sort $(wildcard $(shell cat $^)))' > $@

-include links.mk

copy-links: $(docbook_links:%=$(TARGETDIR)/%)
	$(Q)rm links.mk $(XMLS:%.xml=%.links)

%.links: %.xml
#	$(Q)echo "  XSLTPROC $@"
	$(Q)xsltproc --stringparam www.root "$(WWW_ROOT)" $(XSLTPROCFLAGS) $(BASEDIR)/xsl/getlinks.xsl $< > $@

# For copying other file from source (images, pfd, ...)
$(TARGETDIR)/%: %
	$(Q)mkdir -p $(dir $@);\
	    if [ ! -d "$<" ]; then \
		echo "  CP       $<";\
	    	cp $< $@; \
	    fi