Make debug logging configurable

Author: jonnor

README.md

@@ -29,6 +29,12 @@ See [./examples/repeat.cpp](./examples/repeat.cpp)
 
 MIT, see [./LICENSE](./LICENSE)
 
+## Debugging
+
+To enable debug logging, set the `MSGFLO_CPP_DEBUG` environment variable.
+
+    export MSGFLO_CPP_DEBUG=1
+
 ## TODO
 
 0.1

examples/repeat.cpp

@@ -29,7 +29,6 @@ int main(int argc, char **argv)
     if (argc >= 3) {
         config.url(argv[2]);
     }
-    config.debugOutput(true);
 
     auto engine = msgflo::createEngine(config);
 

include/msgflo.h

@@ -106,7 +106,8 @@ class Engine {
 
 class EngineConfig {
 public:
-    EngineConfig() : _debugOutput(true) {
+    EngineConfig() : _debugOutput(false) {
+        _debugOutput = std::getenv("MSGFLO_CPP_DEBUG") ? true : false;
     }
 
     void debugOutput(bool on) {