[firebase_crashlytics] Logging improvements (firebase#1359)

* Do not add verbose current code location to logs

* Avoid format string injections

* Point out where the logging is coming from

packages/firebase_crashlytics/CHANGELOG.md

@@ -1,3 +1,10 @@
+## 0.1.1+2
+
+* When reporting to Crashlytics on iOS, and printing supplied logs, do not
+  prepend each line with "FirebaseCrashlyticsPlugin.m line 44".
+* Prepend `firebase_crashlytics: ` to the final answer from Crashlytics
+  plugin in the log to realize where it's coming from.
+
 ## 0.1.1+1
 
 * Updated README instructions for contributing for consistency with other Flutterfire plugins.

packages/firebase_crashlytics/ios/Classes/FirebaseCrashlyticsPlugin.m

@@ -42,7 +42,12 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
     // Add logs.
     NSArray *logs = call.arguments[@"logs"];
     for (NSString *log in logs) {
-      CLS_LOG(@"%@", log);
+      // Here and below, use CLSLog instead of CLS_LOG to try and avoid
+      // automatic inclusion of the current code location. It also ensures that
+      // the log is only written to Crashlytics and not also to the offline log
+      // as explained here:
+      // https://support.crashlytics.com/knowledgebase/articles/92519-how-do-i-use-logging
+      CLSLog(@"%@", log);
     }
 
     // Set keys.
@@ -64,14 +69,10 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
     }
 
     // Add additional information from the Flutter framework to the exception reported in
-    // Crashlytics. Using CLSLog instead of CLS_LOG to try to avoid the automatic inclusion of the
-    // line number. It also ensures that the log is only written to Crashlytics and not also to the
-    // offline log as explained here:
-    // https://support.crashlytics.com/knowledgebase/articles/92519-how-do-i-use-logging
-    // Although, that would only happen in debug mode, which this method call is never called in.
+    // Crashlytics.
     NSString *information = call.arguments[@"information"];
     if ([information length] != 0) {
-      CLSLog(information);
+      CLSLog(@"%@", information);
     }
 
     // Report crash.

packages/firebase_crashlytics/lib/src/firebase_crashlytics.dart

@@ -264,7 +264,7 @@ class Crashlytics {
       });
 
       // Print result.
-      print(result);
+      print('firebase_crashlytics: $result');
     }
   }
 }

packages/firebase_crashlytics/pubspec.yaml

@@ -2,7 +2,7 @@ name: firebase_crashlytics
 description:
   Flutter plugin for Firebase Crashlytics. It reports uncaught errors to the
   Firebase console.
-version: 0.1.1+1
+version: 0.1.1+2
 author: Flutter Team <[email protected]>
 homepage: https://github.com/FirebaseExtended/flutterfire/tree/master/packages/firebase_crashlytics