add pdf version

makefile

@@ -1,12 +1,26 @@
-title = 'category-theory-for-programmers'
+title = category-theory-for-programmers
 
 root = $(shell pwd)
 src  = $(root)/src
 
 chapters = $(shell find $(src)/part-* -name '*.html' | sort -V)
 
-book:
-	cd $(src)/init;             \
+all: $(title).epub $(title).pdf
+
+$(title).pdf:
+	@ cd $(src)/init;           \
+	pandoc                      \
+		$(src)/init/preface.html  \
+		$(chapters)               \
+		--smart                   \
+		--toc                     \
+		--number-section          \
+		--latex-engine=xelatex    \
+		-H $(root)/pandoc/options.tex \
+		-o $(root)/$(title).pdf
+
+$(title).epub:
+	@ cd $(src)/init;           \
 	pandoc                      \
 		$(src)/init/preface.html  \
 		$(chapters)               \

pandoc/options.tex

@@ -0,0 +1,15 @@
+% center images
+\usepackage[export]{adjustbox}
+\LetLtxMacro{\OldIncludegraphics}{\includegraphics}
+\renewcommand{\includegraphics}[2][]{
+  \begin{center}
+    \OldIncludegraphics[max width=8cm,max height=4cm,#1]{#2}
+  \end{center}
+}
+
+% avoid that figures get a whole page
+\renewcommand{\floatpagefraction}{.8}%
+
+% start new page with each section
+\usepackage{etoolbox}
+\pretocmd{\section}{\clearpage}{}{}