redirect /book/commands to /docs

This currently generates a poorly formatted list of commands
with no actual links to the manpage. It was originally
referenced as part of a command index in a mock-up that went
away in the previous commit.

Probably nobody links to it, but we can easily just redirect
it to our good-looking link-filled command reference page.

Note that this lets us drop the redundant list of commands
in lib/constants.rb.

app/controllers/books_controller.rb

@@ -16,20 +16,6 @@ class BooksController < ApplicationController
     raise PageNotFound unless @book
   end
 
-  def commands
-    @related = {}
-    ri = RelatedItem.where(:content_type => 'reference', :related_type => 'book')
-    ri.each do |item|
-      cmd = item.name.gsub('git-', '')
-      if s = Section.where(:slug => item.related_id).first
-        @related[cmd] ||= []
-        @related[cmd] << [s.cs_number, s.slug, item.score]
-        @related[cmd].sort!
-      end
-    end
-    @groups = CMD_GROUPS
-  end
-
   def link
     link = params[:link]
     @book = Book.where(:code => params[:lang], :edition => params[:edition]).first

app/views/doc/commands.html.erb

@@ -1,30 +0,0 @@
-<% @section    = 'documentation' %>
-<% @subsection = 'book' %>
-
-<div id='main' class='book'>
-  <h1>Index of Commands</h1>
-  <table class="commands">
-  <% @groups.each do |title, commands| %>
-    <tr>
-      <td colspan="10"><h2><%= title %></h2></td>
-    </tr>
-    <% commands.each do |cmd| %>
-      <tr>
-        <th>&nbsp;</th>
-        <th><%= cmd %></th>
-        <% if @related[cmd] %>
-          <% count = 0 %>
-          <% @related[cmd].each do |number, slug, score| %>
-            <% count += 1 %>
-            <% if count > 10 %>
-              <% count = 1 %>
-              </tr><tr><th>&nbsp;</th><td></td>
-            <% end %>
-            <td nowrap><a href="/book/en/<%= slug %>"><%= number %></a> <small>(<%= score %>)</small></td>
-          <% end %>
-        <% end %>
-      </tr>
-    <% end %>
-  <% end %>
-  </table>
-</div>

config/routes.rb

@@ -36,7 +36,7 @@ Gitscm::Application.routes.draw do
     get "/ch:chapter-:section.html"    => "books#chapter"
     get "/:lang/ch:chapter-:section.html" => "books#chapter"
     get "/index"                          => redirect("/book")
-    get "/commands"                       => "books#commands"
+    get "/commands"                       => redirect("/docs")
     get "/:lang/v:edition"                => "books#show"
     get "/:lang/v:edition/:slug"          => "books#section"
     get "/:lang/v:edition/:chapter/:link" => "books#link", chapter: /(ch|app)\d+/

lib/constants.rb

@@ -7,22 +7,6 @@ TAGLINES = %w{
     distributed-is-the-new-centralized
 }
 
-# DocsController#commands
-CMD_GROUPS = [
-  ['Setup and Config', [ 'config', 'help' ]],
-  ['Getting and Creating Projects', [ 'init', 'clone']],
-  ['Basic Snapshotting', [ 'add', 'status', 'diff', 'commit', 'reset', 'rm', 'mv']],
-  ['Branching and Merging', [ 'branch', 'checkout', 'merge', 'mergetool', 'log', 'stash', 'tag', 'worktree' ]],
-  ['Sharing and Updating Projects', [ 'fetch', 'pull', 'push', 'remote', 'submodule' ]],
-  ['Inspection and Comparison', [ 'show', 'log', 'diff', 'shortlog', 'describe' ]],
-  ['Patching', ['am', 'apply', 'cherry-pick', 'rebase']],
-  ['Debugging', [ 'bisect', 'blame' ]],
-  ['Email', ['am', 'apply', 'format-patch', 'send-email', 'request-pull']],
-  ['External Systems', ['svn', 'fast-import']],
-  ['Administration', [ 'clean', 'gc', 'fsck', 'reflog', 'filter-branch', 'instaweb', 'archive' ]],
-  ['Server Admin', [ 'daemon', 'update-server-info' ]],
-]
-
 #DocsControllers#watch
 VIDEOS = [
   [1, "41027679", "Git Basics", "What is Version Control?", "what-is-version-control", "05:59"],