Expose library version, move it out of options (#588)

* slight cleanup

* Use -D defines for versions

* Undo FIROptionsTest change

* Drop failed macro attempt

* Add correct version to podspec

* Add newline

* Shuffle files around

* Bring back log change

* Fix change

* Fix space

3 files changed, 64 insertions, 1 deletions

diff --git a/Firebase/Core/FIRLogger.m b/Firebase/Core/FIRLogger.m
index 2b2a0ae..55dfdb9 100644
--- a/Firebase/Core/FIRLogger.m
+++ b/Firebase/Core/FIRLogger.m
@@ -15,6 +15,7 @@
 #import "Private/FIRLogger.h"
 
 #import "FIRLoggerLevel.h"
+#import "FIRVersion.h"
 #import "third_party/FIRAppEnvironmentUtil.h"
 
 #include <asl.h>
@@ -229,7 +230,7 @@ void FIRLogBasic(FIRLoggerLevel level,
   NSCAssert(numberOfMatches == 1, @"Incorrect message code format.");
 #endif
   NSString *logMsg = [[NSString alloc] initWithFormat:message arguments:args_ptr];
-  logMsg = [NSString stringWithFormat:@"%@[%@] %@", service, messageCode, logMsg];
+  logMsg = [NSString stringWithFormat:@"%s - %@[%@] %@", FirebaseVersionString, service, messageCode, logMsg];
   dispatch_async(sFIRClientQueue, ^{
     asl_log(sFIRLoggerClient, NULL, level, "%s", logMsg.UTF8String);
   });
diff --git a/Firebase/Core/FIRVersion.m b/Firebase/Core/FIRVersion.m
new file mode 100644
index 0000000..8186683
--- /dev/null
+++ b/Firebase/Core/FIRVersion.m
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+
+#ifndef Firebase_VERSION
+#error "Firebase_VERSION is not defined: add -DFirebase_VERSION=... to the build invocation"
+#endif
+
+#ifndef FIRCore_VERSION
+#error "FIRCore_VERSION is not defined: add -DFIRCore_VERSION=... to the build invocation"
+#endif
+
+
+// The following two macros supply the incantation so that the C
+// preprocessor does not try to parse the version as a floating
+// point number. See
+// https://www.guyrutenberg.com/2008/12/20/expanding-macros-into-string-constants-in-c/
+#define STR(x) STR_EXPAND(x)
+#define STR_EXPAND(x) #x
+
+const unsigned char *const FirebaseVersionString =
+        (const unsigned char *const)STR(Firebase_VERSION);
+
+const unsigned char *const FirebaseCoreVersionString =
+        (const unsigned char *const)STR(FIRCore_VERSION);
diff --git a/Firebase/Core/Private/FIRVersion.h b/Firebase/Core/Private/FIRVersion.h
new file mode 100644
index 0000000..f18f61f
--- /dev/null
+++ b/Firebase/Core/Private/FIRVersion.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/** The version of the Firebase SDK. */
+FOUNDATION_EXPORT const unsigned char *const FirebaseVersionString;
+
+/** The version of the FirebaseCore Component. */
+FOUNDATION_EXPORT const unsigned char *const FirebaseCoreVersionString;