SRC_XML=$(wildcard *.xml)
SRC_IMG=$(wildcard figures/*.png)
SRCS=$(SRC_XML) $(SRC_IMG)
TMP?=/tmp

TGT_BASE=lustre_manual
MASTER_URL=http://build.whamcloud.com/job/lustre-manual/lastSuccessfulBuild/
MASTER_URL_LAB=http://build.lab.whamcloud.com:8080/job/lustre-manual/lastSuccessfulBuild/
MASTER_XHTML=$(MASTER_URL)/artifact/$(TGT_BASE).xhtml
MASTER_XHTML_LAB=$(MASTER_URL_LAB)/artifact/$(TGT_BASE).xhtml
TGT_MASTER=$(TMP)/mastermanual
CHUNKED_HTML=chunked-html


RNG_UBN=/usr/share/xml/docbook/schema/rng/5.0/docbookxi.rng
RNG_REL=/usr/share/xml/docbook5/schema/rng/5.0/docbookxi.rng
RNG_BREW=/usr/local/opt/docbook/docbook/xml/5.0/rng/docbookxi.rng
RNG_MAC=/opt/local/share/xml/docbook/5.0/rng/docbookxi.rng
RNG=$(or $(shell ls $(RNG_UBN) 2> /dev/null), \
	 $(shell ls $(RNG_REL) 2> /dev/null), \
	 $(shell ls $(RNG_BREW) 2> /dev/null),\
	 $(shell ls $(RNG_MAC) 2> /dev/null))
XSL_UBN=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
XSL_REL=/usr/share/sgml/docbook/xsl-ns-stylesheets-1.75.2
XSL_F16=/usr/share/sgml/docbook/xsl-ns-stylesheets
XSL_SLE=/usr/share/xml/docbook/stylesheet/nwalsh5/current
XSL_BREW=/usr/local/opt/docbook-xsl/docbook-xsl
XSL_MAC=/opt/local/share/xsl/docbook-xsl
XSL_MAC2=/opt/local/share/xsl/docbook-xsl-nons
XSL=$(or $(shell ls -d $(XSL_UBN) 2> /dev/null), \
	 $(shell ls -d $(XSL_REL) 2> /dev/null), \
	 $(shell ls -d $(XSL_F16) 2> /dev/null), \
	 $(shell ls -d $(XSL_SLE) 2> /dev/null), \
	 $(shell ls -d $(XSL_BREW) 2> /dev/null),\
	 $(shell ls -d $(XSL_MAC) 2> /dev/null),\
	 $(shell ls -d $(XSL_MAC2) 2> /dev/null))
PRIMARYXSL=$(XSL)/$(subst $(TGT_BASE).,,$@)/docbook.xsl
PRIMARYCHUNKXSL=$(XSL)/html/chunkfast.xsl

.PHONY: all
all: clean check xhtml html chunked-html pdf epub

.PHONY: check
check: $(SRC_XML)
	xmllint --noout --xinclude --noent --relaxng $(RNG) ./index.xml

# Note: can't use "suffix" instead of "subst", because it keeps the '.'
# Note: xsl:import is resolved at compile time, so the primary xsl
#   is substituted into the custom xsl with sed before compliation.
$(CHUNKED_HTML)/%.html: $(SRCS)
	sed -e 's;PRIMARYXSL;${PRIMARYCHUNKXSL};' ./style/customstyle.xsl | \
	xsltproc --xinclude -o ${CHUNKED_HTML}/ - ./index.xml

$(TGT_BASE).html $(TGT_BASE).xhtml $(TGT_BASE).epub: $(SRCS)
	sed -e 's;PRIMARYXSL;${PRIMARYXSL};' ./style/customstyle.xsl | \
	xsltproc --xinclude -o $@ - ./index.xml

$(TGT_BASE).fo: $(SRCS)
	sed -e 's;PRIMARYXSL;${PRIMARYXSL};' ./style/customstyle_fo.xsl | \
	xsltproc --xinclude -o $@ - ./index.xml


$(TGT_BASE).pdf: $(TGT_BASE).fo
		fop $< $@

.PHONY: html
html: $(TGT_BASE).html

.PHONY: xhtml
xhtml: $(TGT_BASE).xhtml

.PHONY: pdf
pdf: $(TGT_BASE).pdf

.PHONY: epub
epub: $(TGT_BASE).epub
	echo "application/epub+zip" > mimetype
	cp -r ./figures ./OEBPS/
	mkdir ./OEBPS/style
	cp ./style/manual.css ./OEBPS/style/
	zip -0Xq $(TGT_BASE).epub mimetype
	zip -Xr9D $(TGT_BASE).epub OEBPS/*
	zip -Xr9D $(TGT_BASE).epub META-INF/*

.PHONY: chunked-html
chunked-html: $(CHUNKED_HTML)/%.html
	cp -r ./figures ./${CHUNKED_HTML}


# get the git hash for the last successful build of the manual
.PHONY: mastermanual.revision
mastermanual.revision:
	wget -O mastermanual.index $(MASTER_URL) || wget -O mastermanual.index $(MASTER_URL_LAB)
	awk '/Revision/ { print $$NF }' mastermanual.index > mastermanual.revision

# only fetch the full manual if we don't have it or the manual changed
$(TGT_MASTER).xhtml: mastermanual.revision
	if ! cmp -s mastermanual.revision $(TGT_MASTER).revision ; then\
		(wget -O $(TGT_MASTER).xhtml $(MASTER_XHTML) || \
		wget -O $(TGT_MASTER).xhtml $(MASTER_XHTML_LAB)) && \
		mv mastermanual.revision $(TGT_MASTER).revision;\
	fi

.PHONY: diff
diff: $(TGT_BASE).xhtml $(TGT_MASTER).xhtml
	./tools/diff.py $(TGT_MASTER).xhtml $(TGT_BASE).xhtml > $(TGT_BASE).diff.html


.PHONY: push
push:
	git push ssh://review.whamcloud.com:29418/doc/manual HEAD:refs/for/master

.PHONY: clean
clean:
	rm -f $(TGT_BASE).html $(TGT_BASE).xhtml $(TGT_BASE).pdf\
		mastermanual.revision mastermanual.index mimetype\
		$(TGT_BASE).diff.html $(TGT_BASE).epub $(TGT_BASE).fo
	rm -rf ./META-INF ./OEBPS ./$(TGT_BASE)