Makefile

.PHONY: clean spellcheck docbook_fix_links

OS := $(shell uname)
ifeq ($(OS),Darwin)
	SHELL := "/bin/bash"
	ASPELLPATH := "/usr/local/bin/aspell"
	FONT := Palatino
else
	ASPELLPATH := "/usr/bin/aspell"
	FONT := Noto Sans
	EPUB_FONTS := 'static/fonts/Noto*.ttf'
endif

ASPELL := $(shell { type $(ASPELLPATH); } 2>/dev/null)
STYLE := $(shell { type /usr/bin/style; } 2>/dev/null)
BUILD_DIR := "build"
BOOK_CH1 := $(sort $(wildcard 01_*))
BOOK_CH2 := $(sort $(wildcard 02_*))
BOOK_CH3 := $(sort $(wildcard 03_*))
BOOK_CH4 := $(sort $(wildcard 04_*))
BOOK_CH5 := $(sort $(wildcard 05_*))
BOOK_CH6 := $(sort $(wildcard 06_*))
BOOK_CH_ALL := $(BOOK_CH1) $(BOOK_CH2) $(BOOK_CH3) $(BOOK_CH4) $(BOOK_CH4) $(BOOK_CH5) $(BOOK_CH6)

PODIR := po
BOOKNAME := sgos_handbook
EMAIL := 'mckinney@subgraph.com'
COPYRIGHT := Subgraph
PACKAGE := 'Subgraph OS Handbook'
VERSION := $(shell git describe --tags)
POTHEADER:= --msgid-bugs-address $(EMAIL) --copyright-holder $(COPYRIGHT) --package-name $(PACKAGE) --package-version $(VERSION)
HTMLOPTIONS:= --toc --highlight-style haddock --section-divs --number-sections --self-contained --css templates/sgos_handbook.css

KERNEL_VERSION:=$(shell uname -r)
LINUX_HEADERS:=/usr/src/linux-headers-$(KERNEL_VERSION)

all: clean readability contents sgos_handbook
pot_all: pot po4a_fixup
docbook_debian: docbook docbook_fix_links 
docbook_dev: docbook_local docbook_fix_links_local

# requires aspell, aspell-en
spellcheck:
ifdef ASPELL
	find . -maxdepth 1 -name "*.md" -exec $(ASPELLPATH) check {} \;
else
	echo "$(ASPELLPATH) is missing -- no spellcheck possible"
endif

# requires diction
readability: $(BUILD_DIR)/readability.txt
$(BUILD_DIR)/readability.txt: $(BOOK_CH_ALL)
ifdef STYLE
	style $^ > $@
else 
	echo "/usr/bin/style is missing -- no readability check possible"
endif

# requires texlive, texlive-xetex, lmodern, pdftk
contents: $(BUILD_DIR)/contents.pdf
$(BUILD_DIR)/contents.pdf:  $(BOOK_CH_ALL) metadata.yaml
	pandoc -r markdown  -o $@ -H templates/style.tex --template=templates/sgos_handbook.latex --toc --highlight-style=haddock --latex-engine=xelatex -V mainfont="$(FONT)" $^

sgos_handbook: $(BUILD_DIR)/sgos_handbook.pdf
$(BUILD_DIR)/sgos_handbook.pdf: static/sgos_handbook_cover.pdf build/contents.pdf 
	pdftk $^ cat output $@

epub: $(BUILD_DIR)/sgos_handbook.epub
$(BUILD_DIR)/sgos_handbook.epub: $(BOOK_CH_ALL) metadata.yaml
	pandoc -r markdown --epub-embed-font=$(EPUB_FONTS) --epub-cover-image=static/images/sgos_handbook_cover.png -o $@ $^


docbook: $(BUILD_DIR)/sgos_handbook.xml
$(BUILD_DIR)/sgos_handbook.xml: $(BOOK_CH4) $(BOOK_CH5) metadata.yaml
	pandoc -s -r markdown -t docbook -o $@ $^

docbook_fix_links:
	sed -i 's/<imagedata fileref="static\/images/<imagedata fileref="..\/..\/images\/en-US/g' $(BUILD_DIR)/sgos_handbook.xml

docbook_local: $(BUILD_DIR)/sgos_handbook_dev.xml
$(BUILD_DIR)/sgos_handbook_dev.xml: $(BOOK_CH4) $(BOOK_CH5) metadata.yaml
	pandoc -s -r markdown -t docbook -o $@ $^

docbook_fix_links_local:
	sed -i 's/<imagedata fileref="static\/images/<imagedata fileref="..\/static\/images/g' $(BUILD_DIR)/sgos_handbook_dev.xml

html: $(BUILD_DIR)/sgos_handbook.html 
$(BUILD_DIR)/sgos_handbook.html: $(BOOK_CH_ALL) metadata.yaml
	pandoc -s -r markdown -t html $(HTMLOPTIONS) -o $@ $^

syscall_table: 06_appendix_02_syscalls_02.md
06_appendix_02_syscalls_02.md: $(LINUX_HEADERS)/arch/x86/include/generated/uapi/asm/unistd_64.h
	awk -f scripts/syscall_table.awk $^ > $@

po4a_fixup: $(PODIR)/$(BOOKNAME)_fixed.pot
$(PODIR)/$(BOOKNAME)_fixed.pot: $(PODIR)/$(BOOKNAME).pot 
	awk -f scripts/po4a_fixup.awk $^ > $@

.PHONY: pot
pot: $(PODIR)/$(BOOKNAME).pot

$(PODIR)/$(BOOKNAME).pot: $(foreach chap,$(BOOK_CH_ALL), $(chap))
	po4a-gettextize $(POTHEADER) -f text -M utf-8 $(foreach pot,$(BOOK_CH_ALL),-m $(pot)) -p $@

$(PODIR)/%.po: $(foreach chap,$(BOOK_CH_ALL), $(chap))
	@po4a-updatepo $(POTHEADER) -f text -M -utf-8 $(foreach chap,$(BOOK_CH_ALL),-m $(chap)) -p $@

# This is a proof-of-concept as we don't have anything to translate.
translate:
	po4a-translate -f text -M utf-8 -m $(PODIR)/$(BOOKNAME)_fixed.pot -p $(PODIR)/$(BOOKNAME)_fixed_fr.po -k 20 -l $(BOOKNAME)_fr.md

# When we start doing real translations, they will be performed on
# individual chapters and not a merged book. The code will look
# # something like this:
#  $(foreach chap,$(BOOK_CH_ALL), po4a-translate -f text -M utf-8 -m $(chap) -p $(PODIR)/$*.po -k 20 -l $(shell basename -s .md $(chap))-$*.md ; )

clean:
	rm -f $(BUILD_DIR)/*.pdf $(BUILD_DIR)/*.txt