Add support for hosting at sub URL.

app/controllers/welcome_controller.rb

@@ -5,7 +5,7 @@ class WelcomeController < ApplicationController
   def index
     if Workshopper::Cache.workshops.keys.length == 1
       id = Workshopper::Cache.workshops.keys.first
-      return redirect_to "/workshop/#{id}/"
+      return redirect_to controller: 'welcome', action: 'workshop', workshop: id
     end
 
     @workshops = Workshopper::Cache.workshops.keys.map do |id|
@@ -20,7 +20,7 @@ def index
   def workshop
     @workshop = Workshopper::Cache.workshops[params[:workshop]]
     lab = @workshop.active_labs.first
-    redirect_to "/workshop/#{params[:workshop]}/lab/#{lab}"
+    redirect_to controller: 'welcome', action: 'lab', workshop: params[:workshop], lab: lab
   end
 
   def lab

app/views/layouts/application.html.erb

@@ -20,7 +20,7 @@
       <span class="navbar-toggler-icon"></span>
     </button>
     <% if @workshop %>
-      <a class="navbar-brand mb-0 h1" href="/workshop/<%= @workshop.id %>" id="workshopName"><%= @workshop.name %></a>
+      <a class="navbar-brand mb-0 h1" href="<%= url_for(controller: 'welcome', action: 'workshop', workshop: @workshop.id) %>" id="workshopName"><%= @workshop.name %></a>
       <% if @lab %>
         <span class="navbar-text" style="margin-right: 1rem;">|</span>
         <span class="navbar-text"><%= @lab.name %></span>

app/views/welcome/index.html.erb

@@ -1,5 +1,5 @@
 <ul>
   <% @workshops.each do |workshop| %>
-  <li><a href="/workshop/<%= workshop[:id] %>"><%= workshop[:name] %></a></li>
+  <li><a href="<%= url_for(controller: 'welcome', action: 'workshop', workshop: workshop[:id]) %>"><%= workshop[:name] %></a></li>
   <% end %>
-</ul>
+</ul>

app/views/welcome/lab.html.erb

@@ -18,16 +18,16 @@
               <span><%= i += 1 %>. <%= @workshop.lab(id).name %></span>
             </li>
           <% elsif @completed.include?(@workshop.lab(id).id) %>
-            <a href="/workshop/<%= @workshop.id %>/lab/<%= @workshop.lab(id).id %>" class="list-group-item list-group-item-action list-group-item-success">
+            <a href="<%= url_for(controller: 'welcome', action: 'lab', workshop: @workshop.id, lab: @workshop.lab(id).id) %>" class="list-group-item list-group-item-action list-group-item-success">
               <%= i += 1 %>. <%= @workshop.lab(id).name %>
             </a>
           <% else %>
-            <a href="/workshop/<%= @workshop.id %>/lab/<%= @workshop.lab(id).id %>" class="list-group-item list-group-item-action">
+            <a href="<%= url_for(controller: 'welcome', action: 'lab', workshop: @workshop.id, lab: @workshop.lab(id).id) %>" class="list-group-item list-group-item-action">
               <%= i += 1 %>. <%= @workshop.lab(id).name %>
             </a>
           <% end %>
         <% end %>
-        <a href="/workshop/<%= @workshop.id %>/complete" class="list-group-item list-group-item-action list-group-item-warning">
+        <a href="<%= url_for(controller: 'welcome', action: 'complete', workshop: @workshop.id) %>" class="list-group-item list-group-item-action list-group-item-warning">
           <i class="fa fa-print"></i> All labs in one page
         </a>
         <% if ENV['ISSUES_URL'] || @workshop.issues %>
@@ -53,12 +53,12 @@
         </div>
         <div class="card-footer">
           <% if id > 0 %>
-            <a href="/workshop/<%= @workshop.id %>/lab/<%= @workshop.lab(@workshop.active_labs[id - 1]).id %>" class="btn btn-primary btn-sm pull-left">
+            <a href="<%= url_for(controller: 'welcome', action: 'lab', workshop: @workshop.id, lab: @workshop.lab(@workshop.active_labs[id - 1]).id) %>" class="btn btn-primary btn-sm pull-left">
               <i class="fa fa-arrow-left"></i> <%= @workshop.lab(@workshop.active_labs[id - 1]).name %>
             </a>
           <% end %>
           <% if id < @workshop.active_labs.length - 1 %>
-            <a href="/workshop/<%= @workshop.id %>/lab/<%= @workshop.lab(@workshop.active_labs[id + 1]).id %>" class="btn btn-primary btn-sm pull-right">
+            <a href="<%= url_for(controller: 'welcome', action: 'lab', workshop: @workshop.id, lab: @workshop.lab(@workshop.active_labs[id + 1]).id) %>" class="btn btn-primary btn-sm pull-right">
               <%= @workshop.lab(@workshop.active_labs[id + 1]).name %> <i class="fa fa-arrow-right"></i>
             </a>
           <% end %>

config.ru

@@ -2,4 +2,20 @@
 
 require_relative 'config/environment'
 
+class FixupScriptName
+    def initialize(app)
+        @app = app
+    end
+
+    def call(env)
+        env['SCRIPT_NAME'] = ActionController::Base.config.relative_url_root
+        env['PATH_INFO'].delete_prefix!(env['SCRIPT_NAME'])
+        @app.call(env)
+    end
+end
+
+if ActionController::Base.config.relative_url_root
+    use FixupScriptName
+end
+
 run Rails.application

lib/workshopper/renderer/adoc.rb

@@ -1,18 +1,25 @@
 require 'asciidoctor'
 
+include Rails.application.routes.url_helpers
+
 module Workshopper
   class Renderer
     class Adoc
 
       def render(workshop, content)
+        imagesdir = url_for(controller: 'welcome', action: 'asset',
+                            workshop: workshop, path: 'images', ext: 'ext',
+                            only_path: true)
+        imagesdir.delete_suffix!('.ext')
+
         content = Asciidoctor::Document.new(content, attributes: {
             'icons' => 'font',
-            'imagesdir' => "/workshop/#{workshop}/asset/images",
+            'imagesdir' => imagesdir,
             'source-highlighter' => 'coderay',
         })
         content.convert
       end
 
     end
   end
-end
+end