Adds user agent string for Cli library. (#98)

* Adds user agent string for Cli library.

* Adds test for user agent.

* Fixes trim stan error.

src/Cli/AcquiaCli.php

@@ -49,9 +49,13 @@ public function __construct(
             throw new \Exception('No VERSION file');
         }
 
+        // Configure global client options to set user agent.
+        $client->addOption('headers', [
+            'User-Agent' => sprintf("%s/%s (https://github.com/typhonius/acquia_cli)", self::NAME, $version)
+        ]);
+
         // Create application.
         $this->setConfig($config);
-
         $application = new Application(self::NAME, $version);
 
         $application->getDefinition()->addOptions(

tests/AcquiaCliApplicationTest.php

@@ -140,6 +140,25 @@ public function testClientOptions()
         $this->assertSame($expectedQuery, $actualQuery);
     }
 
+    public function testClientUserAgent()
+    {
+        $command = ['application:list'];
+
+        $this->execute($command);
+
+        $versionFile = sprintf('%s/VERSION', $this->root);
+        if ($file = @file_get_contents($versionFile)) {
+            $version = trim($file);
+        } else {
+            throw new \Exception('No VERSION file');
+        }
+        $expectedUserAgent = sprintf("%s/%s (https://github.com/typhonius/acquia_cli)", 'AcquiaCli', $version);
+
+        $actualOptions = $this->client->getOptions();
+        $actualUserAgent = $actualOptions['headers']['User-Agent'][0];
+        $this->assertSame($expectedUserAgent, $actualUserAgent);
+    }
+
     public function testRealm()
     {
         $command = ['application:info', 'devcloud2', '--realm=devcloud'];