Initial commit

.gitignore

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+log/*
+!log/.keep

.rspec

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+--color
+--require spec_helper

.rubocop.yml

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+AllCops:
+  TargetRubyVersion: 2.5
+  DisplayStyleGuide: true
+  DisplayCopNames: true
+  Include:
+    - '**/Gemfile'
+  Exclude:
+    - '**/bin/**'
+
+Metrics/LineLength:
+  Max: 120
+
+Metrics/MethodLength:
+  Max: 10
+
+Metrics/BlockLength:
+  Max: 100
+
+Style/Documentation:
+  Enabled: false

Gemfile

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+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+ruby '2.5.1'
+
+gem 'activesupport'
+
+gem 'rspec'
+gem 'webmock'
+
+gem 'rubocop'

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    activesupport (5.2.0)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
+    ast (2.4.0)
+    concurrent-ruby (1.0.5)
+    crack (0.4.3)
+      safe_yaml (~> 1.0.0)
+    diff-lcs (1.3)
+    hashdiff (0.3.7)
+    i18n (1.0.1)
+      concurrent-ruby (~> 1.0)
+    minitest (5.11.3)
+    parallel (1.12.1)
+    parser (2.5.1.0)
+      ast (~> 2.4.0)
+    powerpack (0.1.1)
+    public_suffix (3.0.2)
+    rainbow (3.0.0)
+    rspec (3.7.0)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+    rspec-core (3.7.1)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.1)
+    rubocop (0.55.0)
+      parallel (~> 1.10)
+      parser (>= 2.5)
+      powerpack (~> 0.1)
+      rainbow (>= 2.2.2, < 4.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (~> 1.0, >= 1.0.1)
+    ruby-progressbar (1.9.0)
+    safe_yaml (1.0.4)
+    thread_safe (0.3.6)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
+    unicode-display_width (1.3.2)
+    webmock (3.4.1)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  activesupport
+  rspec
+  rubocop
+  webmock
+
+RUBY VERSION
+   ruby 2.5.1p57
+
+BUNDLED WITH
+   1.16.1

LICENSE

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+Copyright (c) 2018 Yaro Holodiuk
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

README.md

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+## Continuous Versions
+A utility for keeping track of new (Ruby) releases. 
+It has been developed as a part of automating RVM binaries build process 
+that needs to be triggered manually whenever a new version of interpreter 
+is released.
+
+### Installation and usage (tested only on macOS)
+
+1. Download the code and place it in a directory.
+2. Install ruby (Tested on `2.5.1`) and gem `bundle`.
+3. Do `bundle install` within the directory.
+4. To run an iteration of Continuous Versions, do `./bin/continuous-versions`.
+
+### Intuition
+The utility returns the difference between the interpreter releases from RSS feed and 
+those stored in a list on RVM's github. As a result, it allows to quickly check which 
+binaries need to be uploaded.
+
+Currently the utility only supports JRuby flow, so if you run it, it will output the diff
+between the list of binaries at RVM repo and those at JRuby's most recent RSS feed.
+
+Later we will implement another part that submits the GitHub PR based on this diff.
+
+For MRI the flow is slightly more complex, since after we have the versions diff, we need to 
+trigger the server build to produce the binaries for every combination of new version and a
+system supported by RVM. After this process is done, the server would report back to 
+Continuous Versions with the status. If successful, the GitHub PR needs to be submitted.

bin/continuous-versions

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+#!/usr/bin/env ruby
+
+require File.join(File.dirname(__FILE__), '..', 'lib', 'continuous_versions')
+
+ContinuousVersions.start

lib/continuous_versions.rb

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+# frozen_string_literal: true
+
+require 'active_support'
+require 'active_support/dependencies'
+require 'rss'
+require 'open-uri'
+
+ActiveSupport::Dependencies.autoload_paths << File.join(File.dirname(__FILE__), 'ruby_version_checker')
+$LOAD_PATH.unshift(File.dirname(__FILE__))
+
+module ContinuousVersions
+  extend ActiveSupport::Autoload
+
+  autoload :PrSubmitter
+  autoload :RssFromUrlFetcher
+
+  module BuildInteractions
+    extend ActiveSupport::Autoload
+
+    autoload :Listener
+    autoload :Trigger
+  end
+
+  module Interpreters
+    extend ActiveSupport::Autoload
+
+    autoload :Jruby
+    autoload :Mri
+
+    module Jruby
+      extend ActiveSupport::Autoload
+
+      autoload :VersionsFilter
+      autoload :VersionsParser
+    end
+
+    module Mri
+      extend ActiveSupport::Autoload
+
+      autoload :VersionsParser
+    end
+  end
+
+  def self.start
+    Interpreters::Jruby.call
+    # Interpreters::Mri.call
+  end
+end

lib/continuous_versions/build_interactions/listener.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  module BuildInteractions
+    # Continuously listens to build statuses and logs successes or errors
+    class Listener
+    end
+  end
+end

lib/continuous_versions/build_interactions/trigger.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  module BuildInteractions
+    class Trigger
+      def call(versions)
+        return if versions.blank?
+        puts 'Triggering the build for versions: ', versions
+      end
+    end
+  end
+end

lib/continuous_versions/interpreters/jruby.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  module Interpreters
+    module Jruby
+      RSS_URL = 'http://jruby.org/atom.xml'
+
+      def self.call
+        [RssFromUrlFetcher, VersionsParser, VersionsFilter, PrSubmitter].reduce(RSS_URL) do |output, klass|
+          result = klass.new.call(output)
+          break if result.nil?
+          result
+        end
+      end
+    end
+  end
+end

lib/continuous_versions/interpreters/jruby/versions_filter.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  module Interpreters
+    module Jruby
+      class VersionsFilter
+        RVM_CONFIG_MD5_URL = 'https://raw.githubusercontent.com/rvm/rvm/master/config/md5'
+        # 'https://raw.githubusercontent.com/rvm/rvm/ba6894df6ca9794b0ada7c70143af2125c48ba88/config/md5'
+        JRUBY_PREFIX = 'jruby-bin-'
+
+        def call(versions)
+          uri = URI.parse(RVM_CONFIG_MD5_URL)
+          config_md5_contents = uri.open.readlines.map(&:strip).select do |line|
+            line.start_with? JRUBY_PREFIX
+          end
+
+          versions.map { |version| file_signature_for version } - config_md5_contents
+        end
+
+        private
+
+        def file_signature_for(version)
+          return if version.nil?
+
+          file_name = "jruby-bin-#{version}.tar.gz"
+          md5_uri = URI.parse("https://s3.amazonaws.com/jruby.org/downloads/#{version}/#{file_name}.md5")
+          md5 = md5_uri.open.read.strip
+          "#{file_name}=#{md5}"
+        end
+      end
+    end
+  end
+end

lib/continuous_versions/interpreters/jruby/versions_parser.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  module Interpreters
+    module Jruby
+      class VersionsParser
+        NEW_VERSION_REGEX = /^JRuby ([\d.\w_-]+) released[!?.,]*$/i
+
+        def call(rss_feed)
+          rss_feed.entries.map do |entry|
+            entry.title.content.scan(NEW_VERSION_REGEX).to_a.flatten.first
+          end.compact
+        end
+      end
+    end
+  end
+end

lib/continuous_versions/interpreters/mri.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  module Interpreters
+    module Mri
+      RSS_URL = 'http://www.ruby-lang.org/en/feeds/news.rss'
+
+      def self.call
+        [RssFromUrlFetcher, VersionsParser, BuildInteractions::Trigger].reduce(RSS_URL) do |output, klass|
+          result = klass.new.call(output)
+          break if result.nil?
+          result
+        end
+      end
+    end
+  end
+end

lib/continuous_versions/interpreters/mri/versions_parser.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  module Interpreters
+    module Mri
+      class VersionsParser
+        NEW_VERSION_REGEX = /^Ruby ([\d.\w_-]+) released[!?.,]*$/i
+
+        def call(rss_feed)
+          rss_feed.items.map do |item|
+            item.title.scan(NEW_VERSION_REGEX).to_a.flatten.first
+          end.compact
+        end
+      end
+    end
+  end
+end

lib/continuous_versions/pr_submitter.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  class PrSubmitter
+    def call(file_signatures)
+      puts 'Submitting a PR for file signatures: ', file_signatures
+    end
+  end
+end

lib/continuous_versions/rss_from_url_fetcher.rb

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+# frozen_string_literal: true
+
+module ContinuousVersions
+  class RssFromUrlFetcher
+    def call(url)
+      uri = URI.parse(url)
+      RSS::Parser.parse(uri.open)
+    rescue OpenURI::HTTPError
+      nil
+    end
+  end
+end

spec/fixtures/jruby_no_releases.xml

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+<feed xmlns="http://www.w3.org/2005/Atom">
+  <title>JRuby.org News</title>
+  <link href="http://www.jruby.org/atom.xml" rel="self"/>
+  <link href="http://www.jruby.org"/>
+  <updated>2018-04-23T16:31:29+00:00</updated>
+  <id>http://www.jruby.org/</id>
+  <author>
+    <name>The JRuby Team</name>
+    <email>something</email>
+  </author>
+  <entry>
+    <id>something</id>
+    <updated>2018-04-23T00:00:00+00:00</updated>
+    <title>Hello</title>
+  </entry>
+</feed>

spec/fixtures/jruby_with_releases.xml

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+<feed xmlns="http://www.w3.org/2005/Atom">
+  <title>JRuby.org News</title>
+  <link href="http://www.jruby.org/atom.xml" rel="self"/>
+  <link href="http://www.jruby.org"/>
+  <updated>2018-04-23T16:31:29+00:00</updated>
+  <id>http://www.jruby.org/</id>
+  <author>
+    <name>The JRuby Team</name>
+    <email>something</email>
+  </author>
+  <entry>
+    <id>something</id>
+    <updated>2018-04-23T00:00:00+00:00</updated>
+    <title>JRuby 9.1.17.0 Released</title>
+  </entry>
+</feed>