Add deployment packaging task

.gitignore

@@ -12,3 +12,4 @@
 *.o
 *.a
 mkmf.log
+/distro

.travis.yml

@@ -1,4 +1,6 @@
 language: ruby
+env:
+  - CI=true
 sudo: true
 before_install:
     - gem update --system

Rakefile

@@ -1,3 +1,5 @@
+Dir[File.join(Dir.pwd, 'tasks', '*.rake')].each { |f| load f }
+
 require 'bundler/gem_tasks'
 require 'open-uri'
 require 'fileutils'

packaging/wrapper.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -e
+
+# Figure out where this script is located.
+SELFDIR="`dirname \"$0\"`"
+SELFDIR="`cd \"$SELFDIR\" && pwd`"
+
+# Tell Bundler where the Gemfile and gems are.
+export BUNDLE_GEMFILE="$SELFDIR/lib/app/Gemfile"
+unset BUNDLE_IGNORE_CONFIG
+
+# Run the actual app using the bundled Ruby interpreter.
+exec "$SELFDIR/lib/ruby/bin/ruby" -rbundler/setup "$SELFDIR/lib/app/bin/octodown" "$@"

tasks/package.rake

@@ -0,0 +1,168 @@
+require 'octodown'
+require 'fileutils'
+
+module PackageHelpers
+  def curl(file)
+    system "curl -L -O --fail --silent #{file} > /dev/null"
+  end
+
+  def print_to_console(msg)
+    puts "[#{arch}]:" + ' ' * (16 - arch.size) + '=>' + ' ' + msg
+  end
+end
+
+class Package
+  PACKAGE_NAME = 'octodown'
+  VERSION = Octodown::VERSION
+  RB_VERSION = '20141215-2.1.5'
+  PACKAGING_DIR = "#{Octodown.root}/packaging"
+
+  include ::PackageHelpers
+
+  attr_reader :arch, :dir, :tar
+
+  def initialize(arch)
+    abort 'Ruby 2.1.x required' if RUBY_VERSION !~ /^2\.1\./
+
+    @arch = arch
+    @dir = "#{PACKAGE_NAME}-#{VERSION}-#{arch}"
+    @tar = "v#{VERSION}.tar.gz"
+
+    build
+  end
+
+  singleton_class.send :alias_method, :create, :new
+
+  def build
+    initialize_install_dir
+    download_octodown
+    bundle_install
+    remove_unneccesary_files
+    install_ruby
+    create_executable
+    post_cleanup
+
+    create_tarball unless ENV['DIR_ONLY']
+  end
+
+  private
+
+  def post_cleanup
+    print_to_console 'Cleaning up...'
+
+    files = ["packaging/traveling-ruby-#{RB_VERSION}-#{arch}.tar.gz"]
+    files.each do |file|
+      FileUtils.rm file if File.exist? file
+    end
+  end
+
+  def create_tarball
+    print_to_console 'Creating tarball...'
+
+    FileUtils.mkdir_p 'distro'
+    system "tar -czf distro/#{dir}.tar.gz #{dir} > /dev/null"
+    FileUtils.remove_dir "#{dir}", true
+  end
+
+  def create_executable
+    print_to_console 'Creating exexutable...'
+
+    FileUtils.cp 'packaging/wrapper.sh', "#{dir}/#{PACKAGE_NAME}"
+  end
+
+  def install_ruby
+    print_to_console 'Installing Ruby...'
+
+    download_runtime
+    FileUtils.mkdir "#{dir}/lib/ruby"
+    system(
+      "tar -xzf packaging/traveling-ruby-#{RB_VERSION}-#{arch}.tar.gz " \
+      "-C #{dir}/lib/ruby " \
+      '> /dev/null'
+    )
+  end
+
+  def remove_unneccesary_files
+    print_to_console 'Removing unneccesary files...'
+
+    FileUtils.cd "#{dir}/lib/app" do
+      FileUtils.remove_dir '.git', true
+      FileUtils.remove_dir 'spec', true
+    end
+  end
+
+  def initialize_install_dir
+    print_to_console 'Initializing install directory...'
+
+    FileUtils.cd Octodown.root do
+      FileUtils.remove_dir(dir, true) if File.exist? dir
+      FileUtils.mkdir_p "#{dir}/lib/app"
+    end
+  end
+
+  def bundle_install
+    print_to_console 'Running `bundle install`...'
+
+    Bundler.with_clean_env do
+      FileUtils.cd "#{dir}/lib/app" do
+        system(
+          'BUNDLE_IGNORE_CONFIG=1 bundle install ' \
+          '--path vendor --without development --jobs 2 ' \
+          ' > /dev/null'
+        )
+      end
+    end
+  end
+
+  def download_octodown
+    print_to_console 'Downloading octodown...'
+
+    FileUtils.cd "#{dir}/lib/app" do
+      curl "https://github.com/ianks/octodown/archive/#{tar}"
+      system "tar --strip-components=1 -xzf #{tar} > /dev/null"
+      FileUtils.rm tar if File.exist? tar
+    end
+  end
+
+  def download_runtime
+    print_to_console 'Downloading Travelling Ruby...'
+    ruby = "traveling-ruby-#{RB_VERSION}-#{arch}.tar.gz"
+
+    FileUtils.cd PACKAGING_DIR do
+      unless File.exist? ruby
+        curl "http://d6r77u77i8pq3.cloudfront.net/releases/#{ruby}"
+      end
+    end
+  end
+end
+
+desc 'Package octodown into self-contained programs'
+task :package do
+  ['package:linux:x86', 'package:linux:x86_64', 'package:osx'].each do |task|
+    fork do
+      Rake::Task[task].invoke
+      exit
+    end
+  end
+
+  Process.waitall
+end
+
+namespace :package do
+  namespace :linux do
+    desc 'Package for Linux x86'
+    task :x86 do
+      Package.create 'linux-x86'
+    end
+
+    desc 'Package for Linux x86_64'
+    task :x86_64 do
+      Package.create 'linux-x86_64'
+    end
+  end
+
+  desc 'Package for OS X'
+  task :osx do
+    Package.create 'osx'
+  end
+end