Add App Name and Source + NR and App configs to Environment (#653)

* Added ApplicationNamesSource to IConfiguration and included it in Environment payload.

* Added comment.

* Including names as well.

* Added NR Config and potential App Config file paths to Environment data.

* Spacing fix.

* Broke EnvironmentTests into framework and core versions, and added config path testing to it.

* Added 'initial' to new properties for clarity.

* CHANGELOG

* Reverting changelog change to merge.

* Changelog update.

src/Agent/CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### New Features
+* Feature [#580](https://github.com/newrelic/newrelic-dotnet-agent/issues/580): Send initial app name and source in environment data. ([#653](https://github.com/newrelic/newrelic-dotnet-agent/pull/653))
 * Adds support for capturing stack traces for each instrumented method in a Transaction Trace.
   * This feature is disabled by default.
   * You can enable the capture of stack traces by setting either maxStackTrace to any value greater than 1.  This value will only be used to determine if stack traces are captured or not despite the name.

src/Agent/NewRelic/Agent/Core/Configuration/AppSettingsConfigResolveWhenUsed.cs

@@ -22,6 +22,8 @@ private static IConfiguration Configuration
             }
         }
 
+        public static string AppSettingsFilePath => _appSettingsFilePaths;
+
         private static IConfigurationRoot InitializeConfiguration()
         {
             // Get application base directory, where appsettings*.json will be if they exist

src/Agent/NewRelic/Agent/Core/Configuration/DefaultConfiguration.cs

@@ -216,59 +216,78 @@ public virtual string AgentLicenseKey
         private IEnumerable<string> _applicationNames;
         public virtual IEnumerable<string> ApplicationNames { get { return _applicationNames ?? (_applicationNames = GetApplicationNames()); } }
 
+        private string _applicationNamesSource;
+        public virtual string ApplicationNamesSource => _applicationNamesSource;
+
         private IEnumerable<string> GetApplicationNames()
         {
             var runtimeAppNames = _runTimeConfiguration.ApplicationNames.ToList();
             if (runtimeAppNames.Any())
             {
                 Log.Info("Application name from SetApplicationName API.");
+                _applicationNamesSource = "API";
+
                 return runtimeAppNames;
             }
 
             var appName = _configurationManagerStatic.GetAppSetting("NewRelic.AppName");
             if (appName != null)
             {
                 Log.Info("Application name from web.config or app.config.");
+                _applicationNamesSource = "Application Config";
+
                 return appName.Split(StringSeparators.Comma);
             }
 
             appName = _environment.GetEnvironmentVariable("IISEXPRESS_SITENAME");
             if (appName != null)
             {
                 Log.Info("Application name from IISEXPRESS_SITENAME Environment Variable.");
+                _applicationNamesSource = "Environment Variable (IISEXPRESS_SITENAME)";
+
                 return appName.Split(StringSeparators.Comma);
             }
 
             appName = _environment.GetEnvironmentVariable("NEW_RELIC_APP_NAME");
             if (appName != null)
             {
                 Log.Info("Application name from NEW_RELIC_APP_NAME Environment Variable.");
+                _applicationNamesSource = "Environment Variable (NEW_RELIC_APP_NAME)";
+
                 return appName.Split(StringSeparators.Comma);
             }
 
             appName = _environment.GetEnvironmentVariable("RoleName");
             if (appName != null)
             {
                 Log.Info("Application name from RoleName Environment Variable.");
+                _applicationNamesSource = "Environment Variable (RoleName)";
+
                 return appName.Split(StringSeparators.Comma);
             }
 
             if (_localConfiguration.application.name.Count > 0)
             {
                 Log.Info("Application name from newrelic.config.");
+                _applicationNamesSource = "NewRelic Config";
+
                 return _localConfiguration.application.name;
             }
 
             appName = GetAppPoolId();
             if (!string.IsNullOrWhiteSpace(appName))
             {
                 Log.Info("Application name from Application Pool name.");
+                _applicationNamesSource = "Application Pool";
+
                 return appName.Split(StringSeparators.Comma);
             }
 
             if (_httpRuntimeStatic.AppDomainAppVirtualPath == null)
             {
                 Log.Info("Application name from process name.");
+                _applicationNamesSource = "Process Name";
+
                 return new List<string> { _processStatic.GetCurrentProcess().ProcessName };
             }
 
@@ -1778,7 +1797,8 @@ public IDictionary<string, double> WebTransactionsApdex
 
         #endregion Metric naming
 
-        public string NewRelicConfigFilePath { get { return _localConfiguration.ConfigurationFileName; } }
+        public string NewRelicConfigFilePath => _localConfiguration.ConfigurationFileName;
+        public string AppSettingsConfigFilePath => _configurationManagerStatic.AppSettingsFilePath;
 
         #region Utilization
 

src/Agent/NewRelic/Agent/Core/Configuration/IConfigurationManagerStatic.cs

@@ -13,6 +13,7 @@ namespace NewRelic.Agent.Core.Configuration
 {
     public interface IConfigurationManagerStatic
     {
+        string AppSettingsFilePath { get; }
         string GetAppSetting(string key);
     }
 
@@ -26,6 +27,8 @@ public ConfigurationManagerStaticMock(Func<string, string> getAppSetting = null)
             _getAppSetting = getAppSetting ?? (variable => null);
         }
 
+        public string AppSettingsFilePath => throw new NotImplementedException();
+
         public string GetAppSetting(string variable)
         {
             return _getAppSetting(variable);
@@ -38,6 +41,21 @@ public class ConfigurationManagerStatic : IConfigurationManagerStatic
 	{
 		private bool localConfigChecksDisabled;
 
+        public string AppSettingsFilePath
+        {
+            get
+            {
+                try
+                {
+                    if (!localConfigChecksDisabled)
+                        return AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
+                }
+                catch { }
+
+                return null;
+            }
+        }
+
 		public string GetAppSetting(string key)
 		{
 			if (localConfigChecksDisabled || key == null) return null;
@@ -59,6 +77,8 @@ public class ConfigurationManagerStatic : IConfigurationManagerStatic
     {
         private bool localConfigChecksDisabled;
 
+        public string AppSettingsFilePath => AppSettingsConfigResolveWhenUsed.AppSettingsFilePath;
+
         public string GetAppSetting(string key)
         {
             if (localConfigChecksDisabled || key == null) return null;