add initial gemspec and build

.gitignore

@@ -1,3 +1,5 @@
 /_*/
+/Gemfile.lock
+/pkg/
 /.ruby-gemset
 /.ruby-version

Gemfile

@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+# Look in asciidoctor-bespoke.gemspec for runtime and development dependencies.
+gemspec

Rakefile

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+begin
+  require 'bundler/gem_tasks'
+rescue LoadError => e
+  warn e.message
+end
+
+task default: ['build']

asciidoctor-bespoke.gemspec

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+# -*- encoding: utf-8 -*-
+require File.expand_path '../lib/asciidoctor-bespoke/version', __FILE__
+
+Gem::Specification.new do |s|
+  s.name = 'asciidoctor-bespoke'
+  s.version = Asciidoctor::Bespoke::VERSION
+  s.authors = ['Dan Allen']
+  s.email = ['dan.j.allen@gmail.com']
+  s.homepage = 'https://github.com/asciidoctor/asciidoctor-bespoke'
+  s.summary = 'Converts AsciiDoc to the HTML part of a Bespoke.js presentation'
+  s.description = 'A converter for Asciidoctor that produces the HTML part of a Bespoke.js presentation from an AsciiDoc source file.'
+  s.license = 'MIT'
+  s.required_ruby_version = '>= 1.9.3'
+
+  begin
+    s.files = `git ls-files -z -- {bin,lib,templates}/* {LICENSE,README}.adoc Rakefile`.split "\0"
+  rescue
+    s.files = Dir['**/*']
+  end
+
+  s.executables = ['asciidoctor-bespoke']
+  s.extra_rdoc_files = Dir['README.doc', 'LICENSE.adoc']
+  s.require_paths = ['lib']
+
+  #s.add_runtime_dependency 'asciidoctor', '~> 1.5.0'
+
+  s.add_development_dependency 'asciidoctor', '~> 1.5.0'
+  s.add_development_dependency 'rake', '~> 10.4.2'
+  s.add_development_dependency 'slim', '~> 3.0.6'
+  s.add_development_dependency 'thread_safe', '~> 0.3.5'
+  s.add_development_dependency 'tilt', '~> 2.0.2'
+end

bin/asciidoctor-bespoke

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+#!/usr/bin/env ruby
+
+if File.exist?(asciidoctor_bespoke = (File.expand_path '../../lib/asciidoctor-bespoke', __FILE__))
+  require asciidoctor_bespoke
+else
+  require 'asciidoctor-bespoke'
+end
+require 'asciidoctor/cli'
+
+options = Asciidoctor::Cli::Options.new backend: 'bespoke'
+
+# FIXME This is a really bizarre API. Please make me simpler.
+if Integer === (result = options.parse! ARGV)
+  exit result
+else
+  invoker = Asciidoctor::Cli::Invoker.new options
+  GC.start
+  invoker.invoke!
+  exit invoker.code
+end

lib/asciidoctor-bespoke/version.rb

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+module Asciidoctor
+module Bespoke
+  VERSION = '1.0.0.dev'
+end
+end