Treat build version as an application.version (#116)

* Treat build version as an application.version, instead of product version that should be treaten as marketing_version

* Expose application.build but still continue using application.version for metrics

Author: konraddysput

Sources/Features/Attributes/DefaultAttributes.swift

@@ -255,6 +255,7 @@ struct MetricsInfo: AttributesSource {
 
     var immutable: [String: Any?] {
         return ["application.version": Backtrace.applicationVersion,
+             "application.build": Backtrace.buildVersion,
              "application.session": MetricsInfo.session];
     }
 }

Sources/Features/Extensions/Foundation+Extensions.swift

@@ -27,4 +27,8 @@ extension Bundle {
     var releaseVersionNumber: String? {
         return infoDictionary?["CFBundleShortVersionString"] as? String
     }
+    
+    var buildVersionNumber: String? {
+        return infoDictionary?["CFBundleVersion"] as? String
+    }
 }

Sources/Public/BacktraceClientCustomizing.swift

@@ -98,6 +98,8 @@ public let applicationName = Bundle.main.displayName
 
 public let applicationVersion = Bundle.main.releaseVersionNumber
 
+public let buildVersion = Bundle.main.buildVersionNumber
+
 public let defaultMetricsBaseUrlString = "https://events.backtrace.io/api/"
 
 enum BacktraceUrlParsingError: Error {