# -*- makefile-gmake -*-

dir := doc

# You can set these variables from the command line.
SPHINXOPTS    := -q
SPHINXBUILD   = env LD_LIBRARY_PATH=${NOTMUCH_BUILDDIR}/lib sphinx-build
DOCBUILDDIR      := $(dir)/_build

# Internal variables.
ALLSPHINXOPTS   := $(SPHINXOPTS) $(srcdir)/$(dir)
APIMAN		:= $(DOCBUILDDIR)/man/man3/notmuch.3
DOXYFILE	:= $(srcdir)/$(dir)/doxygen.cfg

MAN1_RST := $(wildcard $(srcdir)/doc/man1/*.rst)
MAN5_RST := $(wildcard $(srcdir)/doc/man5/*.rst)
MAN7_RST := $(wildcard $(srcdir)/doc/man7/*.rst)
MAN_RST_FILES := $(MAN1_RST) $(MAN5_RST) $(MAN7_RST)
ALL_RST_FILES := $(MAN_RST_FILES) $(srcdir)/doc/notmuch-emacs.rst

MAN1_ROFF := $(patsubst $(srcdir)/doc/%,$(DOCBUILDDIR)/man/%,$(MAN1_RST:.rst=.1))
MAN5_ROFF := $(patsubst $(srcdir)/doc/%,$(DOCBUILDDIR)/man/%,$(MAN5_RST:.rst=.5))
MAN7_ROFF := $(patsubst $(srcdir)/doc/%,$(DOCBUILDDIR)/man/%,$(MAN7_RST:.rst=.7))
MAN_ROFF_FILES := $(MAN1_ROFF) $(MAN5_ROFF) $(MAN7_ROFF)

MAN_GZIP_FILES := $(addsuffix .gz,${MAN_ROFF_FILES})

MAN1_TEXI := $(patsubst $(srcdir)/doc/man1/%.rst,$(DOCBUILDDIR)/texinfo/%.texi,$(MAN1_RST))
MAN5_TEXI := $(patsubst $(srcdir)/doc/man5/%.rst,$(DOCBUILDDIR)/texinfo/%.texi,$(MAN5_RST))
MAN7_TEXI := $(patsubst $(srcdir)/doc/man7/%.rst,$(DOCBUILDDIR)/texinfo/%.texi,$(MAN7_RST))
INFO_TEXI_FILES := $(MAN1_TEXI) $(MAN5_TEXI) $(MAN7_TEXI)
ifeq ($(WITH_EMACS),1)
	INFO_TEXI_FILES += $(DOCBUILDDIR)/texinfo/notmuch-emacs.texi
endif

INFO_INFO_FILES := $(INFO_TEXI_FILES:.texi=.info)

.PHONY: sphinx-html sphinx-texinfo sphinx-info

.PHONY: install-man build-man apidocs install-apidocs

%.gz: %
	rm -f $@ && gzip --no-name --stdout $^ > $@

ifeq ($(WITH_EMACS),1)
$(DOCBUILDDIR)/.roff.stamp $(DOCBUILDDIR)/.html.stamp $(DOCBUILDDIR)/.texi.stamp : docstring.stamp
endif

ifeq ($(HAVE_PYTHON3_CFFI),1)
DOC_PREREQS=bindings/python-cffi.stamp
else
DOC_PREREQS=
endif

sphinx-html: $(DOCBUILDDIR)/.html.stamp

$(DOCBUILDDIR)/.html.stamp: $(ALL_RST_FILES) $(DOC_PREREQS)
	$(SPHINXBUILD) -b html -d $(DOCBUILDDIR)/html_doctrees $(ALLSPHINXOPTS) $(DOCBUILDDIR)/html
	touch $@

sphinx-texinfo: $(DOCBUILDDIR)/.texi.stamp

$(DOCBUILDDIR)/.texi.stamp: $(ALL_RST_FILES) $(DOC_PREREQS)
	$(SPHINXBUILD) -b texinfo -d $(DOCBUILDDIR)/texinfo_doctrees $(ALLSPHINXOPTS) $(DOCBUILDDIR)/texinfo
	touch $@

sphinx-info: $(DOCBUILDDIR)/.info.stamp

$(DOCBUILDDIR)/.info.stamp: $(DOCBUILDDIR)/.texi.stamp $(DOC_PREREQS)
	$(MAKE) -C $(DOCBUILDDIR)/texinfo info
	touch $@

# Use the man page converter that is available. We should never depend
# on MAN_ROFF_FILES if a converter is not available.
${MAN_ROFF_FILES}: $(DOCBUILDDIR)/.roff.stamp

# By using $(DOCBUILDDIR)/.roff.stamp instead of ${MAN_ROFF_FILES}, we
# convey to make that a single invocation of this recipe builds all
# of the roff files.  This prevents parallel make from starting an
# instance of this recipe for each roff file.
$(DOCBUILDDIR)/.roff.stamp: ${MAN_RST_FILES}
ifeq ($(HAVE_SPHINX),1)
	$(SPHINXBUILD) -b man -d $(DOCBUILDDIR)/man_doctrees $(ALLSPHINXOPTS) $(DOCBUILDDIR)/man
	for section in 1 5 7; do \
	    mkdir -p $(DOCBUILDDIR)/man/man$${section}; \
	    mv $(DOCBUILDDIR)/man/*.$${section} $(DOCBUILDDIR)/man/man$${section}; \
	done
else
	@echo "Fatal: build dependency fail."
	@false
endif
	touch $@

install-man: install-apidocs

ifeq ($(HAVE_DOXYGEN),1)
MAN_GZIP_FILES += ${APIMAN}.gz
apidocs: $(APIMAN)
install-apidocs: ${APIMAN}.gz
	mkdir -p "$(DESTDIR)$(mandir)/man3"
	install -m0644 $(filter %.3.gz,$(MAN_GZIP_FILES)) $(DESTDIR)/$(mandir)/man3

$(APIMAN): $(dir)/config.dox $(srcdir)/$(dir)/doxygen.cfg $(srcdir)/lib/notmuch.h
	mkdir -p $(DOCBUILDDIR)/man/man3
	doxygen $(DOXYFILE)
	rm -f $(DOCBUILDDIR)/man/man3/_*.3
	perl -pi -e 's/^[.]RI "\\fI/.RI "\\fP/' $(APIMAN)
else
apidocs:
install-apidocs:
endif

# Do not try to build or install man pages if a man page converter is
# not available.
ifeq ($(HAVE_SPHINX),0)
build-man:
install-man:
	@echo "No sphinx, will not install man pages."
else

# it should be safe to depend on the stamp file, because it is created
# after all roff files are moved into place.
${MAN_GZIP_FILES}: ${DOCBUILDDIR}/.roff.stamp

build-man: ${MAN_GZIP_FILES}
install-man: ${MAN_GZIP_FILES}
	mkdir -m0755 -p "$(DESTDIR)$(mandir)/man1"
	mkdir -m0755 -p "$(DESTDIR)$(mandir)/man5"
	mkdir -m0755 -p "$(DESTDIR)$(mandir)/man7"
	install -m0644 $(filter %.1.gz,$(MAN_GZIP_FILES)) $(DESTDIR)/$(mandir)/man1
	install -m0644 $(filter %.5.gz,$(MAN_GZIP_FILES)) $(DESTDIR)/$(mandir)/man5
	install -m0644 $(filter %.7.gz,$(MAN_GZIP_FILES)) $(DESTDIR)/$(mandir)/man7
	cd $(DESTDIR)/$(mandir)/man1 && ln -sf notmuch.1.gz notmuch-setup.1.gz
	cd $(DESTDIR)/$(mandir)/man1 && ln -sf notmuch-git.1.gz nmbug.1.gz
endif

ifneq ($(HAVE_SPHINX)$(HAVE_MAKEINFO),11)
build-info:
	@echo "Missing sphinx or makeinfo, not building info pages"
else
build-info: $(DOCBUILDDIR)/.info.stamp
endif

ifneq ($(HAVE_SPHINX)$(HAVE_MAKEINFO)$(HAVE_INSTALL_INFO),111)
install-info:
	@echo "Missing prerequisites, not installing info pages"
else
install-info: build-info
	mkdir -m0755 -p "$(DESTDIR)$(infodir)"
	install -m0644 $(INFO_INFO_FILES) $(DESTDIR)$(infodir)
	for file in $(INFO_INFO_FILES); do install-info $$file $(DESTDIR)$(infodir)/dir; done
endif

$(dir)/config.dox: version.stamp
	echo "PROJECT_NAME = \"Notmuch $(VERSION)\"" > $@
	echo "INPUT=${srcdir}/lib/notmuch.h" >> $@

CLEAN := $(CLEAN) $(DOCBUILDDIR) $(DOCBUILDDIR)/.roff.stamp $(DOCBUILDDIR)/.texi.stamp
CLEAN := $(CLEAN) $(DOCBUILDDIR)/.html.stamp $(DOCBUILDDIR)/.info.stamp
CLEAN := $(CLEAN) $(MAN_GZIP_FILES) $(MAN_ROFF_FILES) $(dir)/conf.pyc $(dir)/config.dox