Beta of epub build

.gitignore

@@ -228,5 +228,7 @@ main.pdf
 _out/*
 *pdf
 order.tex
+*.epub
 # Don't ask about it
 -B
+

.travis.yml

@@ -9,6 +9,9 @@ matrix:
   - name: Wiki Build
     python: '3.6'
     env: BUILD_FOCUS=WIKI
+  - name: Epub Build
+    python: '3.6'
+    env: BUILD_FOCUS=EPUB
   - name: PDF Build
     python: '3.6'
     env: BUILD_FOCUS=PDF

Makefile

@@ -1,7 +1,8 @@
 # Find all tex files one directory down
 TEX=$(shell find . -path "./.git*" -prune -o -type f -iname "*.tex" -print)
-MAIN_TEX=main.tex
+MAIN_TEX=main_wrapper.tex
 PDF_TEX=$(patsubst %.tex,%.pdf,$(MAIN_TEX))
+MAIN_OUT=main.pdf
 BASE=$(patsubst %.tex,%,$(MAIN_TEX))
 OTHER_FILES=$(addprefix $(BASE),.aux .log .synctex.gz .toc .out .blg .bbl .glg .gls .ist .glo)
 BIBS=$(shell find . -maxdepth 2 -mindepth 2 -path "./.git*" -prune -o -type f -iname "*.bib" -print)
@@ -14,7 +15,7 @@ TEX_ORDER=$(shell sh -c "cat order.yaml | sed 's/^- //'")
 CHAPTER_PDF=$(patsubst %,%.pdf,$(TEX_ORDER))
 
 .PHONY: all
-all: $(PDF_TEX) chapters
+all: $(MAIN_OUT) chapters
 	-@latexmk -c
 	-@rm *aux *bbl *glg *glo *gls *ist *latexmk *fls
 	-@rm **/*aux **/*bbl **/*glg **/*glo **/*gls **/*ist **/*latexmk **/*fls
@@ -36,14 +37,15 @@ $(CHAPTER_PDF): %.pdf: %.tex
 	@ls $@ > /dev/null
 	-@rm $@.tmp
 
-$(PDF_TEX): $(TEX) $(MAIN_TEX) $(BIBS) Makefile $(ORDER_TEX)
-	-@latexmk -quiet -interaction=nonstopmode -f -pdf $(MAIN_TEX) # 2>&1 >/dev/null
+$(MAIN_OUT): $(TEX) $(MAIN_TEX) $(BIBS) Makefile $(ORDER_TEX)
+	-@latexmk -quiet -interaction=nonstopmode -f -pdf $(MAIN_TEX)
 	@ls $(PDF_TEX) > /dev/null
+	@mv $(PDF_TEX) $(MAIN_OUT)
 	@echo "Finished"
 
 $(PDF_TEX)-debug: $(TEX) $(MAIN_TEX) $(BIBS) Makefile
 	-@latexmk -interaction=nonstopmode -f -pdf $(MAIN_TEX) > latexmk.out
-	-@mv $(PDF_TEX) $(PDF_TEX-debug)
+	@mv $(PDF_TEX)-debug $(MAIN_OUT)
 
 .PHONY: clean
 clean:

_scripts/deploy.sh

@@ -10,6 +10,8 @@ if test $BUILD_FOCUS = WIKI; then
 
     # Run the actual script
     bash _scripts/push_to_wiki.sh;
+elif test $BUILD_FOCUS = "EPUB"
+    ls
 else
     # Copy main to a tempfile, so we don't get any checkout errors
     TMP_DIR=`mktemp -d`;

_scripts/install.sh

@@ -13,6 +13,7 @@ then
     sudo dpkg -i pandoc-2.7-1-amd64.deb
     popd
 else
+    # EPUB and MD
     echo ""
 fi;
 

_scripts/pandoc_epub_filter.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+
+"""
+Pandoc filter to change each relative URL to absolute
+"""
+
+from panflute import run_filter, Str, Header, Image, Math, Link, RawInline
+import sys
+import re
+import os.path
+
+default_image_alt = 'image'
+
+class NoAltTagException(Exception):
+    pass
+
+def replace_suffix(content, suffix_old, suffix_new):
+    ret = content
+    if content.endswith(suffix_old):
+        ret = content[:-len(suffix_old)] + suffix_new
+    return ret
+
+def deserialize(x):
+    """
+    Takes a panflute element x and returns
+    a basic stringified version of that element
+    """
+
+    if type(x) == Str:
+        return x.text
+    return ' '
+
+def doc_filter(elem, doc):
+    if type(elem) == Image:
+        # Get the number of chars for the alt tag
+        alt_name = ''.join(map(deserialize, elem._content.list))
+        alt_length = len(elem._content)
+        # No alt means no compile
+        # Accessibility by default
+        if alt_length == 0 or alt_name.lower() == default_image_alt:
+            raise NoAltTagException(elem.url)
+
+        # Otherwise link to the raw user link instead of relative
+        # That way the wiki and the site will have valid links automagically
+        new_url = replace_suffix(elem.url, '.eps', '.png')
+        if not os.path.isfile(new_url):
+            raise ValueError('{} Not found'.format(new_url))
+        elem.url = new_url
+        return elem
+
+
+def main(doc=None):
+    return run_filter(doc_filter, doc=doc)
+
+if __name__ == "__main__":
+    main()

_scripts/push_to_wiki.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Every script should have thisj
+# Every script should have this
 set -e
 
 DOCS_SHA=$(git rev-parse --short HEAD)

_scripts/script.sh

@@ -5,6 +5,16 @@ set -o errexit;
 if test $BUILD_FOCUS = "WIKI"
 then
     echo "Dummy Step"
+elif test $BUILD_FOCUS = "EPUB"
+    pandoc --toc -s -f latex \ 
+        -t epub \ 
+        --filter pandoc-citeproc \
+        --filter _scripts/pandoc_epub_filter.py \
+        -M link-citations=true \
+        --epub-cover-image _images/cover.png \
+        -M author="B. Venkatesh, L. Angrave, et Al." \
+        -o main.epub \
+        main.tex
 else
     make
 fi;

github_redefinitions.tex

@@ -5,6 +5,13 @@
 \renewcommand{\keyword}[1]{\texttt{#1}}
 \renewenvironment{proof}{\\ \textbf{(Optional) Proof:} \\}{\\ \textbf{(Optional) ■} \\}
 
+\renewenvironment{titlepage}
+{
+\comment
+}
+{
+\endcomment
+}
 %% Begin unicode math
 
 \renewcommand{\neg}[0]{¬}

main.tex

@@ -68,12 +68,33 @@
 %% Add some space to the table of contents justification
 \addtolength{\cftsecnumwidth}{10pt}
 
+%% Epub command
+
+\ifcsname ifepub\endcsname\else
+  \expandafter\let\csname ifepub\expandafter\endcsname
+                  \csname iffalse\endcsname
+\fi
+
+\ifepub
+\include{github_redefinitions}
+\usepackage{filecontents}
+\begin{filecontents}{title.tex}
+%% These are not the droids you are looking for
+\end{filecontents}
+\fi
+
 \begin{document}
 
 \raggedbottom
 
 %% The title so that it isn't included in the chapters
+
 \include{title}
+
+\setcounter{secnumdepth}{1}
+\setcounter{tocdepth}{1}
+
+\tableofcontents
 \fancyhf{}
 
 %% Introduction, background, then the book starts

main_wrapper.tex

@@ -0,0 +1 @@
+\let\ifepub\iffalse\input{main.tex}

title.tex

@@ -1,6 +1,18 @@
 \pagestyle{fancy}
-\setcounter{secnumdepth}{1}
-\setcounter{tocdepth}{1}
+
+\ifepub
+%% Really gross hack for epub
+%% Comment out all the environments that would output something and put them back in after
+%% Why can't we just comment out the titlepage command?
+%% Latex and pandoc make it difficult with macros
+
+\let\oldbf\textbf
+\renewcommand{\textbf}[1]{}
+
+\let\oldgraphics\includegraphics
+\renewcommand{\includegraphics}[2][]{}
+
+\fi
 
 \begin{titlepage}
 \newgeometry{left=6cm} %defines the geometry for the titlepage
@@ -13,7 +25,9 @@
 \par
 {\color{linecolor}\makebox[0pt][l]{\rule{1.3\textwidth}{3pt}}\color{white}}
 \vfill
+
 \includegraphics[width=10cm]{_images/duck-alpha-cropped.png}
+
 \vfill
 \noindent
 \textbf{ {\huge B. Venkatesh, L. Angrave, et Al.} }
@@ -22,9 +36,12 @@
 \vskip\baselineskip
 \end{titlepage}
 
+\ifepub
+\let\textbf\oldbf
+\let\includegraphics\oldgraphics
+\fi
+
 \restoregeometry % restores the geometry
 \nopagecolor% Use this to restore the color pages to white
 
-\tableofcontents
-