strip out docker stuff, put into a plugin

app/controllers/admin/upgrade_controller.rb

@@ -1,20 +0,0 @@
-# EXPERIMENTAL: front end for upgrading your instance using the web UI
-
-class Admin::UpgradeController < Admin::AdminController
-
-  before_filter :ensure_admin
-  skip_before_filter :check_xhr
-
-  layout 'no_js'
-
-  def index
-    require_dependency 'upgrade/git_repo'
-    @main_repo = Upgrade::GitRepo.new(Rails.root)
-  end
-
-  protected
-
-  def ensure_admin
-    raise Discourse::InvalidAccess.new unless current_user.admin?
-  end
-end

app/views/admin/upgrade/_git_status.html.erb

@@ -1,10 +0,0 @@
-<% if repo.valid? %>
-  Current version: <%= repo.latest_local_commit %> (<%= time_ago_in_words repo.latest_local_commit_date %> ago),
-  Remote version: <a href="<%= repo.url %>"><%= repo.latest_origin_commit %></a> (<%= time_ago_in_words repo.latest_origin_commit_date %> ago)
-  <% if repo.commits_behind > 0 %>
-    commits behind: <%= repo.commits_behind %>
-    <button action="">upgrade</button>
-  <% end %>
-<% else %>
-    Not under source control.
-<% end %>

app/views/admin/upgrade/index.html.erb

@@ -1,18 +0,0 @@
-<h2>Discourse</h2>
-<p>
-<%= render partial: 'git_status', locals: {repo: @main_repo} %>
-</p>
-
-<h2>Plugins</h2>
-<ul>
-  <% Discourse.plugins.each do |plugin| %>
-    <li>
-      <%= plugin.name %> -
-      <%= render partial: 'git_status', locals: {repo: Upgrade::GitRepo.new(File.dirname(plugin.path))} %>
-    </li>
-  <% end %>
-</ul>
-
-<h2>Processes</h2>
-
-<h2>Log</h2>

config/routes.rb

@@ -97,9 +97,6 @@ Discourse::Application.routes.draw do
         delete 'key' => 'api#revoke_key'
       end
     end
-
-    get 'upgrade' => 'upgrade#index'
-
   end # admin namespace
 
   get 'email_preferences' => 'email#preferences_redirect', :as => 'email_preferences_redirect'

lib/upgrade/git_repo.rb

@@ -1,69 +0,0 @@
-module Upgrade; end
-
-# like Grit just very very minimal
-class Upgrade::GitRepo
-  attr_reader :path
-
-  def initialize(path)
-    @path = path
-    @memoize = {}
-  end
-
-  def valid?
-    File.directory?("#{path}/.git")
-  end
-
-  def latest_local_commit
-    run "rev-parse --short HEAD"
-  end
-
-  def latest_origin_commit
-    run "rev-parse --short #{tracking_branch}"
-  end
-
-  def latest_origin_commit_date
-    commit_date(latest_origin_commit)
-  end
-
-  def latest_local_commit_date
-    commit_date(latest_local_commit)
-  end
-
-  def commits_behind
-    run("rev-list --count #{tracking_branch}..HEAD").to_i
-  end
-
-  def url
-    url = run "config --get remote.origin.url"
-    if url =~ /^git/
-      # hack so it works with git urls
-      url = "https://github.com/#{url.split(":")[1]}"
-    end
-  end
-
-  protected
-
-  def commit_date(commit)
-    unix_timestamp = run('show -s --format="%ct" ' << commit).to_i
-    Time.at(unix_timestamp).to_datetime
-  end
-
-  def tracking_branch
-    run "for-each-ref --format='%(upstream:short)' $(git symbolic-ref -q HEAD)"
-  end
-
-  def ensure_updated
-    @updated ||= Thread.new do
-                   # this is a very slow operation, make it async
-                   `cd #{path} && git remote update`
-                 end
-  end
-
-  def run(cmd)
-    ensure_updated
-    @memoize[cmd] ||= `cd #{path} && git #{cmd}`.strip
-  rescue => e
-    p e
-  end
-
-end