[Console] Fix help text for single command applications

Author: codedmonkey

Application.php

@@ -74,7 +74,7 @@ class Application
     private $dispatcher;
     private $terminal;
     private $defaultCommand;
-    private $singleCommand;
+    private $singleCommand = false;
     private $initialized;
 
     /**
@@ -1162,6 +1162,14 @@ public function setDefaultCommand($commandName, $isSingleCommand = false)
         return $this;
     }
 
+    /**
+     * @internal
+     */
+    public function isSingleCommand()
+    {
+        return $this->singleCommand;
+    }
+
     private function splitStringByWidth($string, $width)
     {
         // str_split is not suitable for multi-byte characters, we should use preg_split to get char array properly.

Command/Command.php

@@ -533,14 +533,15 @@ public function getHelp()
     public function getProcessedHelp()
     {
         $name = $this->name;
+        $isSingleCommand = $this->application && $this->application->isSingleCommand();
 
         $placeholders = array(
             '%command.name%',
             '%command.full_name%',
         );
         $replacements = array(
             $name,
-            $_SERVER['PHP_SELF'].' '.$name,
+            $isSingleCommand ? $_SERVER['PHP_SELF'] : $_SERVER['PHP_SELF'].' '.$name,
         );
 
         return str_replace($placeholders, $replacements, $this->getHelp() ?: $this->getDescription());

Tests/Command/CommandTest.php

@@ -166,6 +166,14 @@ public function testGetProcessedHelp()
         $command = new \TestCommand();
         $command->setHelp('');
         $this->assertContains('description', $command->getProcessedHelp(), '->getProcessedHelp() falls back to the description');
+
+        $command = new \TestCommand();
+        $command->setHelp('The %command.name% command does... Example: php %command.full_name%.');
+        $application = new Application();
+        $application->add($command);
+        $application->setDefaultCommand('namespace:name', true);
+        $this->assertContains('The namespace:name command does...', $command->getProcessedHelp(), '->getProcessedHelp() replaces %command.name% correctly in single command applications');
+        $this->assertNotContains('%command.full_name%', $command->getProcessedHelp(), '->getProcessedHelp() replaces %command.full_name% in single command applications');
     }
 
     public function testGetSetAliases()