minor #88 Improved the way we display the executed installer command (javiereguiluz)

This PR was squashed before being merged into the 1.0-dev branch (closes #88).

Discussion
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Improved the way we display the executed installer command

This PR tries to solve #80 for the most used case.  Around 80% of users use Linux or Mac and most of them will install the installer in `/usr/local/bin/`, so we can easily improve commands' output.

Commits
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576b71d Improved the way we display the executed installer command

Author: javiereguiluz

src/Symfony/Installer/AboutCommand.php

@@ -81,7 +81,25 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $output->writeln(sprintf($commandHelp,
             $this->appVersion,
             str_repeat('=', 20 + strlen($this->appVersion)),
-            $_SERVER['PHP_SELF']
+            $this->getExecutedCommand()
         ));
     }
+
+    /**
+     * Returns the executed command.
+     *
+     * @return string
+     */
+    private function getExecutedCommand()
+    {
+        $pathDirs = explode(PATH_SEPARATOR, $_SERVER['PATH']);
+        $executedCommand = $_SERVER['PHP_SELF'];
+        $executedCommandDir = dirname($executedCommand);
+
+        if (in_array($executedCommandDir, $pathDirs)) {
+            $executedCommand = basename($executedCommand);
+        }
+
+        return $executedCommand;
+    }
 }

src/Symfony/Installer/NewCommand.php

@@ -562,6 +562,14 @@ private function getExecutedCommand()
             $version = $this->version;
         }
 
-        return sprintf('%s new %s %s', $_SERVER['PHP_SELF'], $this->projectName, $version);
+        $pathDirs = explode(PATH_SEPARATOR, $_SERVER['PATH']);
+        $executedCommand = $_SERVER['PHP_SELF'];
+        $executedCommandDir = dirname($executedCommand);
+
+        if (in_array($executedCommandDir, $pathDirs)) {
+            $executedCommand = basename($executedCommand);
+        }
+
+        return sprintf('%s new %s %s', $executedCommand, $this->projectName, $version);
     }
 }