# -----------------------------------------------------------------------------
# Makefile for FSFE website build, phase 1
# -----------------------------------------------------------------------------
# This Makefile is executed in the root of the source directory tree, and
# creates some .xml and xhtml files as well as some symlinks, all of which
# serve as input files in phase 2. The whole phase 1 runs within the source
# directory tree and does not touch the target directory tree at all.
# -----------------------------------------------------------------------------

.PHONY: all .FORCE
.FORCE:

# -----------------------------------------------------------------------------
# Dive into subdirectories
# -----------------------------------------------------------------------------

SUBDIRS := $(shell find */* -name "Makefile" | xargs dirname)

all: $(SUBDIRS)
$(SUBDIRS): .FORCE
	@echo "* Preparing subdirectory $*"
	@$(MAKE) -j -k -C $@

# -----------------------------------------------------------------------------
# Handle local menus
# -----------------------------------------------------------------------------

MENUSOURCES := $(shell find -name '*.xhtml' | xargs grep -l '<localmenu.*</localmenu>' )

all: localmenuinfo.en.xml
localmenuinfo.en.xml: ./tools/buildmenu.xsl $(MENUSOURCES)
	{ printf '<localmenuset>'; \
	  grep -E '<localmenu.*</localmenu>' $^ \
          | sed -r 's;(.*/)?(.+)\.([a-z][a-z])\.xhtml:(.+);\
                    <menuitem language="\3"><dir>/\1</dir><link>\2.html</link>\4</menuitem>;'; \
	  printf '</localmenuset>'; \
	} | xsltproc -o $@ $< -

# -----------------------------------------------------------------------------
# Timestamp files for regular jobs and XML inclusion in various places
# -----------------------------------------------------------------------------

YEAR  := <?xml version="1.0" encoding="utf-8"?><dateset><date year="$(shell date +%Y)" /></dateset> 
MONTH := <?xml version="1.0" encoding="utf-8"?><dateset><date month="$(shell date +%Y-%m)" /></dateset> 
DAY   := <?xml version="1.0" encoding="utf-8"?><dateset><date day="$(shell date +%Y-%m-%d)" /></dateset>

all: d_year.en.xml d_month.en.xml d_day.en.xml
d_day.en.xml: $(if $(findstring   $(DAY),$(shell cat d_day.en.xml)),,.FORCE)
	printf %s\\n   '$(DAY)' >$@
d_month.en.xml: $(if $(findstring $(MONTH),$(shell cat d_month.en.xml)),,.FORCE)
	printf %s\\n '$(MONTH)' >$@
d_year.en.xml: $(if $(findstring  $(YEAR),$(shell cat d_year.en.xml)),,.FORCE)
	printf %s\\n  '$(YEAR)' >$@

# -----------------------------------------------------------------------------
# Create XML symlinks
# -----------------------------------------------------------------------------

# After this step, the following symlinks will exist:
# * tools/.texts-<lang>.xml for each language
# * ./fundraising.<lang>.xml for each language
# Each of these symlinks will point to the corresponding file without a dot at
# the beginning of the filename, if present, and to the English version
# otherwise. This symlinks make sure that phase 2 can easily use the right file
# for each language, also as a prerequisite in the Makefile.

LANGUAGES := $(shell . build/languages.sh && get_languages)

TEXTS_LINKS := $(foreach lang,$(LANGUAGES),tools/.texts-$(lang).xml)

all: $(TEXTS_LINKS)
tools/.texts-%.xml: .FORCE
	@if [ -f tools/texts-$*.xml ]; then \
	  ln -sf texts-$*.xml $@; \
	else \
	  ln -sf texts-en.xml $@; \
	fi

FUNDRAISING_LINKS := $(foreach lang,$(LANGUAGES),.fundraising.$(lang).xml)

all: $(FUNDRAISING_LINKS)
.fundraising.%.xml: .FORCE
	@if [ -f fundraising.$*.xml ]; then \
	  ln -sf fundraising.$*.xml $@; \
	else \
	  ln -sf fundraising.en.xml $@; \
	fi

# -----------------------------------------------------------------------------
# Create XSL symlinks
# -----------------------------------------------------------------------------

# After this step, each directory with source files for HTML pages contains a
# symlink named .default.xsl and pointing to the default.xsl "responsible" for
# this directory. These symlinks make it easier for the phase 2 Makefile to
# determine which XSL script should be used to build a HTML page from a source
# file.

# All directories containing source files for HTML pages.
XHTML_DIRS := $(patsubst %/,%,$(sort $(dir $(shell find -name '*.??.xhtml'))))

.PHONY: default_xsl
all: default_xsl
default_xsl:
	@for directory in $(XHTML_DIRS); do \
	  dir="$${directory}"; \
	  prefix=""; \
	  until [ -f "$${dir}/default.xsl" -o "$${dir}" = "." ]; do \
	    dir="$${dir%/*}"; \
	    prefix="$${prefix}../"; \
	  done; \
	  ln -sf "$${prefix}default.xsl" "$${directory}/.default.xsl"; \
	done

# -----------------------------------------------------------------------------
# Generate XML filelists
# -----------------------------------------------------------------------------

# After this step, the following files will be up to date:
# * tags/tagged-<tags>.en.xhtml for each tag used. Apart from being
#   automatically created, these are regular source files for HTML pages, and
#   in phase 2 are built into pages listing all news items and events for a
#   tag.
# * <dir>/.<base>.xmllist for each <dir>/<base>.sources as well as for each
#   tags/tagged-<tags>.en.xhtml. These files are used in phase 2 to include the
#   correct XML files when generating the HTML pages. It is taken care that
#   these files are only updated whenever their content actually changes, so
#   they can serve as a prerequisite in the phase 2 Makefile.
# This step is handled in an external script, because the list of files to
# generate is not known when the Makefile starts - some new tags might be
# introduced when generating the .xml files in the news/* subdirectories.

.PHONY: xmllists
all: xmllists
xmllists: $(SUBDIRS)
	@build/make_xmllists.sh