Switch templates from HAML to ERB

Make RailsAdmin have fewer dependencies and so slightly reduce total
installation size.

Align the project with default upstream Rails practices. Starting a new
Rails project includes ERB by default but not HAML. By switching, we
don't pull in additional templating practices beyond what any default
project is already using.

The change may also help encourage contributors. While nearly all Rails
developers have direct experience working with ERB, the same is not
always true of HAML. This removes a small barrier.

Fixes #3173

.rubocop_todo.yml

@@ -302,7 +302,6 @@ Style/IdenticalConditionalBranches:
 # Cop supports --auto-correct.
 Style/IfUnlessModifier:
   Exclude:
-    - "config/initializers/haml.rb"
     - "lib/rails_admin/adapters/active_record.rb"
     - "lib/rails_admin/adapters/mongoid.rb"
     - "lib/rails_admin/bootstrap-sass.rb"

Appraisals

@@ -1,6 +1,5 @@
 appraise "rails-6.0" do
   gem 'rails', '~> 6.0.0'
-  gem 'haml'
   gem 'sassc-rails', '~> 2.1'
   gem 'devise', '~> 4.7'
 
@@ -34,7 +33,6 @@ end
 
 appraise "rails-6.1" do
   gem 'rails', '~> 6.1.0'
-  gem 'haml'
   gem 'sassc-rails', '~> 2.1'
   gem 'devise', '~> 4.7'
 
@@ -68,7 +66,6 @@ end
 
 appraise "rails-7.0" do
   gem 'rails', '~> 7.0.0.alpha2'
-  gem 'haml'
   gem 'sassc-rails', '~> 2.1'
   gem 'devise', '~> 4.7', github: 'strobilomyces/devise', branch: 'patch-1'
 

Gemfile

@@ -2,7 +2,6 @@ source 'https://rubygems.org'
 
 gem 'appraisal', '>= 2.0'
 gem 'rails'
-gem 'haml'
 gem 'devise'
 gem 'webrick', '~> 1.7'
 

app/views/kaminari/ra-twitter-bootstrap/_gap.html.erb

@@ -0,0 +1,5 @@
+<li class="disabled">
+  <a href="#">
+    <%= raw(t 'admin.pagination.truncate') %>
+  </a>
+</li>

app/views/kaminari/ra-twitter-bootstrap/_next_page.html.erb

@@ -0,0 +1,9 @@
+<% if current_page.last? %>
+  <li class="next disabled">
+    <%= link_to raw(t 'admin.pagination.next'), '#' %>
+  </li>
+<% else %>
+  <li class="next">
+    <%= link_to raw(t 'admin.pagination.next'), url, class: (remote ? 'pjax' : '') %>
+  </li>
+<% end %>

app/views/kaminari/ra-twitter-bootstrap/_page.html.erb

@@ -0,0 +1,9 @@
+<% if page.current? %>
+  <li class="active">
+    <%= link_to page, url, class: (remote ? 'pjax' : '') %>
+  </li>
+<% else %>
+  <li>
+    <%= link_to page, url, class: (remote ? 'pjax' : '') %>
+  </li>
+<% end %>

app/views/kaminari/ra-twitter-bootstrap/_paginator.html.erb

@@ -0,0 +1,13 @@
+<%= paginator.render do %>
+  <ul class="pagination">
+    <%= prev_page_tag %>
+    <% each_page do |page| %>
+      <% if page.left_outer? or page.right_outer? or page.inside_window? %>
+        <%= page_tag page %>
+      <% elsif !page.was_truncated? %>
+        <%= gap_tag %>
+      <% end %>
+    <% end %>
+    <%= next_page_tag %>
+  </ul>
+<% end %>

app/views/kaminari/ra-twitter-bootstrap/_prev_page.html.erb

@@ -0,0 +1,9 @@
+<% if current_page.first? %>
+  <li class="prev disabled">
+    <%= link_to raw(t 'admin.pagination.previous'), '#' %>
+  </li>
+<% else %>
+  <li class="prev">
+    <%= link_to raw(t 'admin.pagination.previous'), url, class: (remote ? 'pjax' : '') %>
+  </li>
+<% end %>

app/views/kaminari/ra-twitter-bootstrap/without_count/_next_page.html.erb

@@ -0,0 +1,9 @@
+<% if current_page.last? %>
+  <li class="next disabled">
+    <%= link_to raw(t 'admin.pagination.next'), '#' %>
+  </li>
+<% else %>
+  <li class="next">
+    <%= link_to raw(t 'admin.pagination.next'), url, class: (remote ? 'pjax' : '') %>
+  </li>
+<% end %>

app/views/kaminari/ra-twitter-bootstrap/without_count/_paginator.html.erb

@@ -0,0 +1,6 @@
+<%= paginator.render do %>
+  <ul class="pagination">
+    <%= prev_page_tag if !current_page.first? %>
+    <%= next_page_tag %>
+  </ul>
+<% end %>

app/views/kaminari/ra-twitter-bootstrap/without_count/_prev_page.html.erb

@@ -0,0 +1,9 @@
+<% if current_page.first? %>
+  <li class="prev disabled">
+    <%= link_to raw(t 'admin.pagination.previous'), '#' %>
+  </li>
+<% else %>
+  <li class="prev">
+    <%= link_to raw(t 'admin.pagination.previous'), url, class: (remote ? 'pjax' : '') %>
+  </li>
+<% end %>

app/views/layouts/rails_admin/_head.html.erb

@@ -0,0 +1,7 @@
+<meta content="IE=edge" http-equiv="X-UA-Compatible"/>
+<meta content="text/html; charset=utf-8" http-equiv="Content-Type"/>
+<meta content="width=device-width, initial-scale=1" name="viewport; charset=utf-8"/>
+<meta content="NONE,NOARCHIVE" name="robots"/>
+<%= csrf_meta_tag %>
+<%= stylesheet_link_tag "rails_admin/rails_admin.css", media: :all %>
+<%= javascript_include_tag "rails_admin/rails_admin.js" %>

app/views/layouts/rails_admin/_navigation.html.erb

@@ -0,0 +1,21 @@
+<div class="container-fluid">
+  <div class="navbar-header">
+    <button class="navbar-toggle collapsed" type="button" data-toggle="collapse" data-target="#secondary-navigation">
+      <span class="sr-only">
+        <%= t('admin.toggle_navigation') %>
+      </span>
+      <span class="icon-bar"></span>
+      <span class="icon-bar"></span>
+      <span class="icon-bar"></span>
+    </button>
+    <a class="navbar-brand pjax" href="<%= dashboard_path %>">
+      <%= _get_plugin_name[0] || 'Rails' %>
+      <small>
+        <%= _get_plugin_name[1] || 'Admin' %>
+      </small>
+    </a>
+  </div>
+  <div class="collapse navbar-collapse" id="secondary-navigation">
+    <%= render partial: 'layouts/rails_admin/secondary_navigation' %>
+  </div>
+</div>

app/views/layouts/rails_admin/_secondary_navigation.html.erb

@@ -0,0 +1,24 @@
+<ul class="nav navbar-nav navbar-right root_links">
+  <% actions(:root).select(&:show_in_navigation).each do |action| %>
+    <li class="<%= action.action_name %>_root_link">
+      <%= link_to wording_for(:menu, action), { action: action.action_name, controller: 'rails_admin/main' }, class: action.pjax? ? "pjax" : "" %>
+    </li>
+  <% end %>
+  <% if main_app_root_path = (main_app.root_path rescue false) %>
+    <li>
+      <%= link_to t('admin.home.name'), main_app_root_path %>
+    </li>
+  <% end %>
+  <% if _current_user %>
+    <% if user_link = edit_user_link %>
+      <li class="edit_user_root_link">
+        <%= user_link %>
+      </li>
+    <% end %>
+    <% if logout_path.present? %>
+      <li>
+        <%= link_to content_tag('span', t('admin.misc.log_out'), class: 'label label-danger'), logout_path, method: logout_method %>
+      </li>
+    <% end %>
+  <% end %>
+</ul>

app/views/layouts/rails_admin/_sidebar_navigation.html.erb

@@ -0,0 +1,9 @@
+<ul class="nav nav-pills nav-stacked">
+  <%= main_navigation %>
+</ul>
+<ul class="nav nav-pills nav-stacked">
+  <%= root_navigation %>
+</ul>
+<ul class="nav nav-pills nav-stacked">
+  <%= static_navigation %>
+</ul>

app/views/layouts/rails_admin/application.html.erb

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html lang="<%= I18n.locale %>">
+  <head>
+    <%= render "layouts/rails_admin/head" %>
+  </head>
+  <body class="rails_admin">
+    <div data-i18n-options="<%= I18n.t("admin.js").to_json %>" id="admin-js"></div>
+    <div class="label label-warning" id="loading" style="display:none; position:fixed; right:20px; bottom:20px; z-index:100000">
+      <%= t('admin.loading') %>
+    </div>
+    <nav class="navbar navbar-default navbar-fixed-top">
+      <%= render "layouts/rails_admin/navigation" %>
+    </nav>
+    <div class="container-fluid">
+      <div class="row">
+        <div class="col-sm-3 col-md-2 sidebar-nav">
+          <%= render "layouts/rails_admin/sidebar_navigation" %>
+        </div>
+        <div class="col-sm-9 col-sm-offset-3 col-md-10 col-md-offset-2">
+          <div class="content" data-pjax-container="<%= true %>">
+            <%= render template: 'layouts/rails_admin/pjax' %>
+          </div>
+        </div>
+      </div>
+    </div>
+  </body>
+</html>

app/views/layouts/rails_admin/modal.js.erb

@@ -0,0 +1,7 @@
+<% flash && flash.each do |key, value| %>
+  <div class="<%= flash_alert_class(key) %> alert alert-dismissible">
+    <button class="close" data-dismiss="alert" type="button">&times;</button>
+    <%= value %>
+  </div>
+<% end %>
+<%= yield %>

app/views/layouts/rails_admin/pjax.html.erb

@@ -0,0 +1,20 @@
+<title>
+  <%= "#{@abstract_model.try(:pretty_name) || @page_name} | #{[_get_plugin_name[0] || 'Rails', _get_plugin_name[1] || 'Admin'].join(' ')}" %>
+</title>
+<div class="page-header" data-model="<%= @abstract_model.to_param %>">
+  <h1>
+    <%= @page_name %>
+  </h1>
+</div>
+<% flash && flash.each do |key, value| %>
+  <div class="<%= flash_alert_class(key) %> alert alert-dismissible">
+    <button class="close" data-dismiss="alert" type="button">&times;</button>
+    <%= value %>
+  </div>
+<% end %>
+<%= breadcrumb %>
+<ul class="nav nav-tabs">
+  <%= menu_for((@abstract_model ? (@object.try(:persisted?) ? :member : :collection) : :root), @abstract_model, @object) %>
+  <%= content_for :contextual_tabs %>
+</ul>
+<%= yield %>

app/views/rails_admin/main/_dashboard_history.html.erb

@@ -0,0 +1,45 @@
+<table class="table table-condensed table-striped table-hover">
+  <thead>
+    <tr>
+      <th class="shrink user">
+        <%= t("admin.table_headers.username") %>
+      </th>
+      <th class="shrink items">
+        <%= t("admin.table_headers.item") %>
+      </th>
+      <th class="changes">
+        <%= t("admin.table_headers.changes") %>
+      </th>
+    </tr>
+  </thead>
+  <tbody>
+    <% @history.each do |t| %>
+      <% abstract_model = RailsAdmin.config(t.table).abstract_model %>
+      <tr>
+        <td>
+          <%= t.try :username %>
+        </td>
+        <% if o = abstract_model.try(:get, t.item) %>
+          <% label = o.send(abstract_model.config.object_label_method) %>
+          <% if show_action = action(:show, abstract_model, o) %>
+            <td>
+              <%= link_to(label, url_for(action: show_action.action_name, model_name: abstract_model.to_param, id: o.id), class: 'pjax') %>
+            </td>
+          <% else %>
+            <td>
+              <%= label %>
+            </td>
+          <% end %>
+        <% else %>
+          <% label = Object.const_defined?(t.table) ? t.table.constantize.model_name.human : t.table %>
+          <td>
+            <%= "#{label} ##{t.item}" %>
+          </td>
+        <% end %>
+        <td>
+          <%= t.message %>
+        </td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>