Add version string to driver announcement

lib/appium.js

@@ -96,6 +96,25 @@ class AppiumDriver extends BaseDriver {
     throw new Error(`${msg} Please check your desired capabilities.`);
   }
 
+  getDriverVersion (driver) {
+    const NAME_DRIVER_MAP = {
+      SelendroidDriver: 'appium-selendroid-driver',
+      AndroidUiautomator2Driver: 'appium-uiautomator2-driver',
+      XCUITestDriver: 'appium-xcuitest-driver',
+      YouiEngineDriver: 'appium-youiengine-driver',
+      FakeDriver: 'appium-fake-driver',
+      AndroidDriver: 'appium-android-driver',
+      IosDriver: 'appium-ios-driver',
+      WindowsDriver: 'appium-windows-driver',
+    };
+    if (!NAME_DRIVER_MAP[driver.name]) {
+      log.warn(`Unable to get version of driver '${driver.name}'`);
+      return;
+    }
+    let {version} = require(`${NAME_DRIVER_MAP[driver.name]}/package.json`);
+    return version;
+  }
+
   async getStatus () {
     let config = await getAppiumConfig();
     let gitSha = config['git-sha'];
@@ -114,16 +133,23 @@ class AppiumDriver extends BaseDriver {
     return sessions;
   }
 
-  async createSession (caps, reqCaps) {
-    caps = _.defaults(_.clone(caps), this.args.defaultCapabilities);
-    let InnerDriver = this.getDriverForCaps(caps);
-    let curSessions;
-    log.info(`Creating new ${InnerDriver.name} session`);
+  printNewSessionAnnouncement (driver, caps) {
+    let driverVersion = this.getDriverVersion(driver);
+    let introString = driverVersion ?
+      `Creating new ${driver.name} (v${driverVersion}) session` :
+      `Creating new ${driver.name} session`;
+    log.info(introString);
     log.info('Capabilities:');
     util.inspect(caps);
     for (let [cap, value] of _.toPairs(caps)) {
       log.info(`  ${cap}: ${util.inspect(value)}`);
     }
+  }
+
+  async createSession (caps, reqCaps) {
+    caps = _.defaults(_.clone(caps), this.args.defaultCapabilities);
+    let InnerDriver = this.getDriverForCaps(caps);
+    this.printNewSessionAnnouncement(InnerDriver, caps);
 
     // sessionOverride server flag check
     // this will need to be re-thought when we go to multiple session support
@@ -140,6 +166,7 @@ class AppiumDriver extends BaseDriver {
       }
     }
 
+    let curSessions;
     try {
       curSessions = this.curSessionDataForDriver(InnerDriver);
     } catch (e) {