PowerShell · TravisEz13 · Jan 31, 2018 · Jan 29, 2018 · Jan 31, 2018 · Jan 31, 2018
@@ -21,6 +21,7 @@ internal static class ApplicationInsightsTelemetry
        // The name of the file by when present in $PSHOME will enable telemetry.
        // If this file is not present, no telemetry will be sent.
        private const string TelemetrySemaphoreFilename = "DELETE_ME_TO_DISABLE_CONSOLEHOST_TELEMETRY";
+        private const string TelemetryOptoutEnvVar = "POWERSHELL_TELEMETRY_OPTOUT";

        // The path to the semaphore file which enables telemetry
        private static string TelemetrySemaphoreFilePath = Path.Combine(
@@ -42,6 +43,28 @@ static ApplicationInsightsTelemetry()
            TelemetryConfiguration.Active.TelemetryChannel.DeveloperMode = _developerMode;
        }

+        private static bool GetEnvironmentVariableAsBool(string name, bool defaultValue) {
+            var str = Environment.GetEnvironmentVariable(name);
+            if (string.IsNullOrEmpty(str))
+            {
+                return defaultValue;
+            }
+
+            switch (str.ToLowerInvariant())
+            {
+                case "true":
+                case "1":
+                case "yes":
+                    return true;
+                case "false":
+                case "0":
+                case "no":
+                    return false;
+                default:
+                    return defaultValue;
+            }
+        }
+
        /// <summary>
        /// Send the telemetry
        /// </summary>
@@ -50,14 +73,18 @@ private static void SendTelemetry(string eventName, Dictionary<string,string>pay
            try
            {
                // if the semaphore file exists, try to send telemetry
-                if (Utils.NativeFileExists(TelemetrySemaphoreFilePath))
+                var enabled = Utils.NativeFileExists(TelemetrySemaphoreFilePath) && !GetEnvironmentVariableAsBool(TelemetryOptoutEnvVar, false);
+
+                if (!enabled)
+                {
+                    return;
+                }
+
+                if (_telemetryClient == null)
                {
-                    if ( _telemetryClient == null )
-                    {
-                        _telemetryClient = new TelemetryClient();
-                    }
-                    _telemetryClient.TrackEvent(eventName, payload, null);
+                    _telemetryClient = new TelemetryClient();
                }
+                _telemetryClient.TrackEvent(eventName, payload, null);
            }
            catch (Exception)
            {