Streamlined workflow. Now editing chapters in-place, with a script to…

… load them (+deps) into OPF spine/manifest. Misc. other changes.

Makefile

@@ -1,28 +1,21 @@
-dl:
+dl: clean
 	wget -c -rnH -k -np http://www.feynmanlectures.caltech.edu/
 
-macros:
-	./bin/macros
+preprocess:
+	./bin/macros < I_01.html > template/macros.tex
+	./bin/chapters | xargs ./bin/preprocess
 
-concat:
-	find * -maxdepth 0 -type f | grep -P 'I_\d+\.html' | xargs bin/concat > flp.html
-
-replace: macros concat
-	./bin/replace flp.html
-
-preprocess: concat
-	./bin/mxml flp.html
-
-epub: replace preprocess
+epub: preprocess
 	cp -r ./template/epub/* .
-	grep -oP '(?<=img src=")[^"]*(?=")' flp.html | xargs zip flp.epub mimetype META-INF/* content.opf flp.html
+	./bin/opf content.opf
+	(./bin/chapters; ./bin/images) | zip -@ flp.epub mimetype META-INF/* content.opf
 
 mobi: epub
 	ebook-convert flp.epub flp.mobi
 
 convert: epub mobi
 
 clean:
-	git clean -Xf
+	git clean -Xfd
 
 all: dl convert

bin/chapters

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+find * -maxdepth 0 -type f | grep -P 'I_\d+\.html'

bin/images

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+./bin/chapters | xargs grep -hoP '(?<=img src=")[^"]*(?=")' 

bin/macros

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-<I_01.html awk '
+awk '
   /Macros/ { getline 
              gsub("], ","] \n")
              gsub("^ *","")
@@ -13,4 +13,4 @@
   !($2 in a) { a[$2]
                print 
              }
-' >template/macros.tex
+'

bin/opf

@@ -0,0 +1,40 @@
+#!/usr/bin/env ruby
+
+require 'nokogiri'
+require 'mime/types'
+
+class OPF
+  attr_reader :xml
+  def initialize path
+    @xml = Nokogiri::XML File.read(path)
+  end
+  def add_chapter filename
+    id, type, href = generics filename
+    add_manifest id, type, href
+    add_spine id
+  end
+  def add_image filename
+    id, type, href = generics filename
+    add_manifest id, type, href
+  end
+  private
+  def generics filename
+    id   = filename.delete ?.
+    type = MIME::Types.type_for(filename)[0].content_type
+    href = filename
+    return [id, type, href]
+  end
+  def add_manifest id, type, href
+    item = @xml.create_element 'item', id: id, href: href, 'media-type' => type
+    item.parent = @xml.at_css 'manifest'
+  end
+  def add_spine id
+    itemref = @xml.create_element 'itemref', idref: id
+    itemref.parent = @xml.at_css 'spine'
+  end
+end
+
+opf = OPF.new(ARGV.first)
+IO.popen('./bin/chapters').map(&:chomp).each { |filename| opf.add_chapter filename }
+IO.popen('./bin/images').map(&:chomp).each { |filename| opf.add_image filename }
+File.write ARGV.first, opf.xml.to_xml

bin/preprocess

@@ -0,0 +1,51 @@
+#!/usr/bin/env ruby
+
+require 'nokogiri'
+
+class Equation < String
+  def to_image 
+    str = self.inspect[1..-2]
+    bin = File.dirname(__FILE__)
+    cmd = [bin, 'eq2img'].join('/')
+    IO.popen([cmd, str]).read.chomp
+  end
+  def for_html
+    ['<img src="', self.to_image, '">'].join
+  end
+end
+
+class String
+  def slim
+    html = self.to_html.css('.document').children
+    html.css('footer').remove
+    return html.to_html
+  end
+  def prettify
+    html = self.to_html
+    html.css('span.tag').each do |tag| 
+      tag.content = tag.content << ?\s 
+    end
+    return html.to_html
+  end
+  def tex2png
+    delimiters = [
+      /\\begin{equation\*?}.*?\\end{equation\*?}/m,
+      /\\begin{align\*?}.*?\\end{align\*?}/m,
+      /\$+.*?\$+/m
+    ]
+    delimiters.each do |pattern|
+      gsub!(pattern) do |equation| 
+        Equation.new(equation).for_html
+      end
+    end
+    return self
+  end
+  def to_html
+    Nokogiri::HTML self
+  end
+end
+
+ARGV.each do |html|
+  output = File.read(html).slim.prettify.tex2png
+  File.write html, output
+end

template/epub/content.opf

@@ -8,9 +8,7 @@
     <dc:language>en</dc:language>
   </metadata>
   <manifest>
-    <item id="flp" href="flp.html" media-type="application/xhtml+xml"/>
   </manifest>
   <spine>
-    <itemref idref="flp">
   </spine>
 </package>

template/epub/mimetype

@@ -0,0 +1 @@
+application/epub+zip