rakefile

require 'rake/clean'
require './lib/roadmap'
require 'mustache'

## Default target - targets are "site", "book"

task :default => [:site]

## Filesets

SITE		= "site/%n.html"
BOOK		= "book/%n.html"

YML_SRC		= FileList['src/*.yml']

SITE_INDICES	= FileList['index_alpha.ham','index_type.ham'].pathmap("tmp/%p")
SITE_STATIC	= FileList['static/site/*.ham']
SITE_OUT	= (YML_SRC).pathmap(SITE)

BOOK_INDICES	= FileList['book.ham'].pathmap("tmp/%p")
BOOK_STATIC	= FileList['static/book/*.ham']
BOOK_OUT	= (YML_SRC).pathmap("book/%n.html")

CLEAN.include('tmp/*')

## Helpers

def haml_indirect target, where, built
	task target => built
        from = built.pathmap("%{#{where},tmp}X_#{where}.ham")
       	haml built, from
end

def haml built, from
	file built => from do
          sh "haml -r ./lib/helpers.rb #{from} > #{built}" unless uptodate?(built,FileList[from])
        end
end

def generate_indices which, how, view
  outofdate = which.any? {|target| !uptodate?(target,(YML_SRC.add view))}
  sh "ruby lib/#{how}.rb" if outofdate
end

def mustache built, from, template, fix
	file built => from do
          view = "views/#{template}.tmpl"
          return if uptodate?(built,from) && uptodate?(built, FileList[view])
          template = IO.read(view)
          data = Roadmap.new("src").interpret(from)
          expanded = Mustache.render template, data
          File.open(built,"w") {|f| f.write(expanded)}
          # Ugly hack to fix internal links for the eBook version - improve this
          sh "perl -i.old -pe 's/]\\((.*?).html\\)/](\#$1)/g' #{built}" unless !fix
        end
end

## Synthetic tasks
SITE_OUT.each do |built|
  haml_indirect(:site,"site",built)
end

BOOK_OUT.each do |built|
  rebuilt = haml_indirect(:book,"book",built)
end

SITE_STATIC.each do |from|
  built = from.pathmap(SITE)
  task :site => built
  haml built, from
end

BOOK_STATIC.each do |from|
  built = from.pathmap(BOOK)
  task :book => built
  haml built, from
end

SITE_INDICES.each do |from|
  task from => :site_index
  built = from.pathmap(SITE)
  task :site => built
  haml built, from
end

BOOK_INDICES.each do |from|
  task from => :book_index
  built = from.pathmap(BOOK)
  task :book => built
  haml built, from
end

YML_SRC.each do |from|
        built = from.pathmap("%{src,tmp}X_book.ham")
        mustache built, from, "practice-book", true
end

YML_SRC.each do |from|
        built = from.pathmap("%{src,tmp}X_site.ham")
        mustache built, from, "practice", false
end

## Final tasks

file "eBook.pdf" => :book do
  sh "prince book/book.html -o eBook.pdf"
end

task :site => :site_index
task :book => :book_index

task :site_index => [] do |t|
  generate_indices SITE_INDICES, "site", "views/index.tmpl"
end

task :book_index => [] do |t|
  generate_indices BOOK_INDICES, "book", "views/book.tmpl"
end