* src/IDF/Middlewre.php: add a global template variable

"usherConfigured" to denote whether we render links to the usher
control functions in the forge administration
* src/IDF/Scm/Monotone.php: moved IDF_Scm_Monotone_Stdio into
separate file src/IDF/Scm/Monotone/Stdio.php
* src/IDF/Scm/Usher.php: new class to query and modify the state
of a running usher instance
* src/IDF/Views/Admin.php: add actions to query the list of
configured servers, edit their status, view their open connections
and control the state of the usher as a whole
* src/IDF/conf/idf.php-dist: optional usher configuration added;
mail address of monotone-users added; spelling changes
* src/IDF/conf/urls.php: added needed URLs for usher actions
* src/IDF/templates/idf/gadmin/base.html: usher links

src/IDF/templates/idf/gadmin/base.html

@@ -43,18 +43,21 @@
 <div id="main-tabs">
   <a href="{url 'IDF_Views_Admin::projects'}"{block tabprojects}{/block}>{trans 'Projects'}</a>
   <a href="{url 'IDF_Views_Admin::users'}"{block tabusers}{/block}>{trans 'People'}</a>
+  {if $usherConfigured}
+  <a href="{url 'IDF_Views_Admin::usher'}"{block tabusher}{/block}>{trans 'Usher'}</a>
+  {/if}
 </div>
 <div id="sub-tabs">{block subtabs}{/block}</div>
 </div>
-	  <h1 id="title" class="title">{block title}{$page_title}{/block}</h1>
+      <h1 id="title" class="title">{block title}{$page_title}{/block}</h1>
   </div>
   <div id="bd">
-    <div id="yui-main"> 
+    <div id="yui-main">
       <div class="yui-b">
-	<div class="yui-g"> 
+    <div class="yui-g">
           {if $user and $user.id}{getmsgs $user}{/if}
-	  <div class="content">{block body}{/block}</div>
-	</div>
+      <div class="content">{block body}{/block}</div>
+    </div>
       </div>
     </div>
     <div class="yui-b context">{block context}{/block}</div>

src/IDF/templates/idf/gadmin/usher/base.html

@@ -0,0 +1,6 @@
+{extends "idf/gadmin/base.html"}
+{block tabprojects} class="active"{/block}
+{block subtabs}
+<a {if $inUsher}class="active" {/if}href="{url 'IDF_Views_Admin::usher'}">{trans 'Configured servers'}</a> |
+<a {if $inUsherControl}class="active" {/if}href="{url 'IDF_Views_Admin::usherControl', array('')}">{trans 'Usher control'}</a>
+{/block}

src/IDF/templates/idf/gadmin/usher/connections.html

@@ -0,0 +1,19 @@
+{extends "idf/gadmin/usher/base.html"}
+
+{block docclass}yui-t3{assign $inUsherServerConnections=true}{/block}
+
+{block body}
+<table class="recent-issues">
+<tr>
+    <th>{trans "address"}</th>
+    <th>{trans "port"}</th>
+</tr>
+{foreach $connections as $connection}
+<tr>
+    <td>{$connection.address}</td>
+    <td>{$connection.port}</td>
+</tr>
+{/foreach}
+</table>
+{/block}
+

src/IDF/templates/idf/gadmin/usher/control.html

@@ -0,0 +1,32 @@
+{extends "idf/gadmin/usher/base.html"}
+
+{block docclass}yui-t3{assign $inUsherControl=true}{/block}
+
+{block body}
+<p>
+{trans 'current server status:'} {$status} |
+{if $status == "SHUTDOWN"}
+   <a href="{url 'IDF_Views_Admin::usherControl', array('startup')}">{trans 'startup'}</a>
+{else}
+   <a href="{url 'IDF_Views_Admin::usherControl', array('shutdown')}">{trans 'shutdown'}</a>
+{/if}
+</p>
+
+<p>{trans 'reload server configuration:'}
+   <a href="{url 'IDF_Views_Admin::usherControl', array('reload')}">{trans 'reload'}</a>
+</p>
+{/block}
+
+{block context}
+<div class="issue-submit-info">
+<p><strong>{trans 'Status explanation'}</strong></p>
+<ul>
+<li>ACTIVE n: {trans 'active with n total open connections'}</li>
+<li>WAITING: {trans 'waiting for new connections'}</li>
+<li>SHUTTINGDOWN: {trans 'usher is being shut down, not accepting connections'}</li>
+<li>SHUTDOWN: {trans 'usher is shut down, all local servers are stopped and not accepting connections'}</li>
+</ul>
+
+</div>
+{/block}
+

src/IDF/templates/idf/gadmin/usher/index.html

@@ -0,0 +1,52 @@
+{extends "idf/gadmin/usher/base.html"}
+
+{block docclass}yui-t3{assign $inUsher=true}{/block}
+
+{block body}
+<table class="recent-issues">
+<tr>
+    <th>{trans "server name"}</th>
+    <th>{trans "status"}</th>
+    <th>{trans "action"}</th>
+</tr>
+{foreach $servers as $server}
+<tr>
+    <td>{$server.name}</td>
+    <td>{$server.status}</td>
+    <td>
+        {if preg_match("/ACTIVE|RUNNING|SLEEPING/", $server.status)}
+           <a href="{url 'IDF_Views_Admin::usherServerControl', array($server.name, 'stop')}">
+             {trans 'stop'}</a>
+        {elseif $server.status == "STOPPED"}
+           <a href="{url 'IDF_Views_Admin::usherServerControl', array($server.name, 'start')}">
+             {trans 'start'}</a>
+        {/if}
+        {if preg_match("/ACTIVE|WAITING|SLEEPING|STOPPING/", $server.status)}
+          | <a href="{url 'IDF_Views_Admin::usherServerControl', array($server.name, 'kill')}">
+              {trans 'kill'}</a>
+        {/if}
+        {if preg_match("/STOPPING|ACTIVE/", $server.status)}
+          | <a href="{url 'IDF_Views_Admin::usherServerConnections', array($server.name)}">
+              {trans 'active connections'}</a>
+        {/if}
+</tr>
+{/foreach}
+</table>
+{/block}
+
+{block context}
+<div class="issue-submit-info">
+<p><strong>{trans 'Status explanation'}</strong></p>
+<ul>
+<li>REMOTE: {trans 'remote server without open connections'}</li>
+<li>ACTIVE n: {trans 'server with n open connections'}</li>
+<li>WAITING: {trans 'local server running, without open connections'}</li>
+<li>SLEEPING: {trans 'local server not running, waiting for connections'}</li>
+<li>STOPPING n: {trans 'local server is about to stop, n connections still open'}</li>
+<li>STOPPED: {trans 'local server not running, not accepting connections'}</li>
+<li>SHUTDOWN: {trans 'usher is shut down, not running and not accepting connections'}</li>
+</ul>
+
+</div>
+{/block}
+