Add deployment packaging task

Author: ianks

.gitignore

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

.ruby-version

@@ -0,0 +1 @@
+2.1.5

.travis.yml

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

Rakefile

@@ -1,3 +1,6 @@
+Dir[File.join(Dir.pwd, 'tasks', '**', '*.rb')].each { |f| require f }
+Dir[File.join(Dir.pwd, 'tasks', '*.rake')].each { |f| load f }
+
 require 'bundler/gem_tasks'
 require 'open-uri'
 require 'fileutils'
@@ -11,6 +14,13 @@ RSpec::Core::RakeTask.new :spec do |task|
   task.rspec_opts = '--format documentation'
 end
 
+Distrubution.configure do |config|
+  config.package_name = 'octodown'
+  config.version = Octodown::VERSION
+  config.rb_version = '20141215-2.1.5'
+  config.packaging_dir = "#{Octodown.root}/packaging"
+end
+
 task :default => [:spec, :rubocop]
 
 task :styles do

octodown.gemspec

@@ -29,4 +29,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubocop', '~> 0.28.0'
   spec.add_development_dependency 'bundler', '~> 1.7'
   spec.add_development_dependency 'rake',    '~> 10.0'
+  spec.add_development_dependency 'octokit'
 end

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/distrubution/configuration.rb

@@ -0,0 +1,14 @@
+module Distrubution
+  class << self
+    attr_accessor :configuration
+  end
+
+  def self.configure
+    self.configuration ||= Configuration.new
+    yield configuration
+  end
+
+  class Configuration
+    attr_accessor :package_name, :packaging_dir, :version, :rb_version
+  end
+end

tasks/distrubution/executable.rb

@@ -0,0 +1,28 @@
+Dir[File.join(Dir.pwd, 'tasks', '**', '*.rb')].each { |f| require f }
+
+module Distrubution
+  class Executable
+    attr_reader :package
+
+    include PackageHelpers
+
+    def initialize(package)
+      @package = package
+    end
+
+    def self.create(dir)
+      executable = new(dir)
+      executable.copy_wrapper
+      executable
+    end
+
+    def copy_wrapper
+      print_to_console 'Creating exexutable...'
+
+      FileUtils.cp(
+        'packaging/wrapper.sh',
+        "#{package.dir}/#{Distrubution.configuration.package_name}"
+      )
+    end
+  end
+end

tasks/distrubution/package.rb

@@ -0,0 +1,88 @@
+require 'fileutils'
+require 'octodown'
+
+Dir[File.join(Dir.pwd, 'tasks', '**', '*.rb')].each { |f| require f }
+
+module Distrubution
+  class Package
+    include PackageHelpers
+
+    attr_reader :arch, :dir, :tarball, :version, :rb_version, :package
+
+    def initialize(arch)
+      abort 'Ruby 2.1.x required' if RUBY_VERSION !~ /^2\.1\./
+
+      @arch = arch
+      @version = Distrubution.configuration.version
+      @rb_version = Distrubution.configuration.rb_version
+      @dir = "#{Distrubution.configuration.package_name}-" \
+        "#{version}-#{arch}"
+      @package = self
+    end
+
+    def self.create(args)
+      new(*args).build
+    end
+
+    def build
+      initialize_install_dir
+      download_octodown
+      remove_unneccesary_files
+      install_ruby_and_gems
+      create_executable
+      post_cleanup
+      @tarball = create_tarball
+    end
+
+    private
+
+    def post_cleanup
+      print_to_console 'Cleaning up...'
+
+      files = [
+        "#{Distrubution.configuration.packaging_dir}/" \
+        "traveling-ruby-#{rb_version}-#{arch}.tar.gz"
+      ]
+
+      files.each { |file| FileUtils.rm file if File.exist? file }
+    end
+
+    def create_tarball
+      Tarball.create self
+    end
+
+    def create_executable
+      Executable.create self
+    end
+
+    def install_ruby_and_gems
+      TravellingRuby.install self
+    end
+
+    def remove_unneccesary_files
+      FileUtils.cd "#{dir}/lib/app" do
+        FileUtils.remove_dir '.git', true
+        FileUtils.remove_dir 'spec', true
+      end
+    end
+
+    def initialize_install_dir
+      FileUtils.cd Octodown.root do
+        FileUtils.remove_dir(dir, true) if File.exist? dir
+        FileUtils.mkdir_p "#{dir}/lib/app"
+      end
+    end
+
+    def download_octodown
+      print_to_console 'Downloading octodown...'
+      tar = "v#{version}.tar.gz"
+
+      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
+  end
+end

tasks/distrubution/package_helpers.rb

@@ -0,0 +1,12 @@
+module Distrubution
+  module PackageHelpers
+    def curl(file)
+      system "curl -L -O --fail --silent #{file}"
+    end
+
+    def print_to_console(msg)
+      arch = package.arch
+      puts "[#{arch}]:" + ' ' * (16 - arch.size) + '=>' + ' ' + msg
+    end
+  end
+end