SERVER-7344 add interpreterVersion to shell and buildInfo

Add the ability to get a string for the JavaScript engine so that
scripts can know when they are running under SpiderMonkey versus V8.
The shell gets an 'interpreterVersion()' function that returns a string.
The 'buildInfo' command gets a new field named 'interpreterVersion'.
SpiderMonkey returns "SpiderMonkey 1.7"; V8 returns "V8 3.12.19".

1 files changed, 12 insertions, 4 deletions

diff --git a/src/mongo/db/dbcommands_generic.cpp b/src/mongo/db/dbcommands_generic.cpp
index ec36f104758..25c9a0dde0c 100644
--- a/src/mongo/db/dbcommands_generic.cpp
+++ b/src/mongo/db/dbcommands_generic.cpp
@@ -110,10 +110,18 @@ namespace mongo {
             help << "get version #, etc.\n";
             help << "{ buildinfo:1 }";
         }
-        bool run(const string& dbname, BSONObj& jsobj, int, string& errmsg, BSONObjBuilder& result, bool fromRepl ) {
-            result << "version" << versionString << "gitVersion" << gitVersion() << "sysInfo" << sysInfo();
-            result << "versionArray" << versionArray;
-            result << "bits" << ( sizeof( int* ) == 4 ? 32 : 64 );
+        bool run(const std::string& dbname,
+                 BSONObj& jsobj,
+                 int, // options
+                 std::string& errmsg,
+                 BSONObjBuilder& result,
+                 bool fromRepl) {
+            result << "version" << versionString
+                   << "gitVersion" << gitVersion()
+                   << "sysInfo" << sysInfo()
+                   << "versionArray" << versionArray
+                   << "interpreterVersion" << globalScriptEngine->getInterpreterVersionString()
+                   << "bits" << ( sizeof( int* ) == 4 ? 32 : 64 );
             result.appendBool( "debug" , debug );
             result.appendNumber("maxBsonObjectSize", BSONObjMaxUserSize);
             return true;