Class: Nanoc3::Extra::AutoCompiler

Inherits:
Object
  • Object
show all
Defined in:
lib/nanoc3/extra/auto_compiler.rb

Overview

A web server that will automatically compile items as they are requested. It also serves static files such as stylesheets and images.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(site_path) ⇒ AutoCompiler

Creates a new autocompiler for the given site.

Parameters:

  • site_path (String) —

    The path to the site to autocompile



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# File 'lib/nanoc3/extra/auto_compiler.rb', line 15

def initialize(site_path)
  require 'rack'
  require 'mime/types'

  # Set site
  @site_path = site_path

  # Create mutex to prevent parallel requests
  require 'thread'
  @mutex = Mutex.new
end

Instance Attribute Details

#site ⇒ Nanoc3::Site (readonly)

Returns The site this autocompiler belongs to.

Returns:



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# File 'lib/nanoc3/extra/auto_compiler.rb', line 10

def site
  @site
end

Instance Method Details

#call(env) ⇒ Array

Calls the autocompiler. The behaviour of this method is defined by the [Rack specification](rack.rubyforge.org/doc/files/SPEC.html).

Parameters:

  • env (Hash) —

    The environment, as defined by the Rack specification

Returns:

  • (Array) —

    An array containing the status, the headers, and the body, as defined by the Rack specification



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# File 'lib/nanoc3/extra/auto_compiler.rb', line 34

def call(env)
  @mutex.synchronize do
    # Start with a new site
    build_site

    # Find rep
    path = Rack::Utils::unescape(env['PATH_INFO'])
    reps = site.items.map { |i| i.reps }.flatten
    rep = reps.find do |r|
      r.path == path ||
        r.raw_path == site.config[:output_dir] + path
    end

    # Recompile
    site.compile if rep

    # Get paths by appending index filenames
    if path =~ /\/$/
      possible_paths = site.config[:index_filenames].map { |f| path + f }
    else
      possible_paths = [ path ]
    end

    # Find matching file
    modified_path = possible_paths.find { |f| File.file?(site.config[:output_dir] + f) }
    modified_path ||= path

    # Serve using Rack::File
    puts "*** serving file #{modified_path}"
    res = file_server.call(env.merge('PATH_INFO' => modified_path))
    puts "*** done serving file #{modified_path}"
    res
  end
rescue StandardError, ScriptError => e
  # Add compilation stack to env
  env['nanoc.stack'] = []
  stack.reverse.each do |obj|
    if obj.is_a?(Nanoc3::ItemRep) # item rep
      env['nanoc.stack'] << "[item] #{obj.item.identifier} (rep #{obj.name})"
    else # layout
      env['nanoc.stack'] << "[layout] #{obj.identifier}"
    end
  end

  # Re-raise error
  raise e
end