add skipLogCapture (#355)

* add skipLogCapture

* define setUpLogCapture

Author: KazuCocoa

lib/desired-caps.js

@@ -125,6 +125,9 @@ const desiredCapConstraints = {
   showIWDPLog: {
     isBoolean: true
   },
+  skipLogCapture: {
+    isBoolean: true
+  },
 };
 
 function desiredCapValidation (caps) {

lib/driver.js

@@ -351,7 +351,7 @@ class IosDriver extends BaseDriver {
 
     await isolateSimulatorDevice(this.sim, this.opts);
     this.localConfig = await setLocaleAndPreferences(this.sim, this.opts, this.isSafari(), endSimulator);
-    await this.startLogCapture(this.sim);
+    await this.setUpLogCapture();
     await this.prelaunchSimulator();
     await this.startInstruments();
     await this.onInstrumentsLaunch();
@@ -368,7 +368,7 @@ class IosDriver extends BaseDriver {
     await utils.setBundleIdFromApp(this.opts);
     await this.createInstruments();
     await runRealDeviceReset(this.realDevice, this.opts);
-    await this.startLogCapture();
+    await this.setUpLogCapture();
     await this.installToRealDevice();
     await this.startInstruments();
     await this.onInstrumentsLaunch();
@@ -685,6 +685,19 @@ class IosDriver extends BaseDriver {
     }
   }
 
+  async setUpLogCapture () {
+    if (this.caps.skipLogCapture) {
+      logger.info("'skipLogCapture' is set. Skipping the collection of system logs and crash reports.");
+      return;
+    }
+
+    if (this.isRealDevice()) {
+      await this.startLogCapture();
+    } else {
+      await this.startLogCapture(this.sim);
+    }
+  }
+
   get realDevice () {
     this._realDevice = this._realDevice || this.getIDeviceObj();
     return this._realDevice;