Error Handling

- Errors that occur during initialization no longer prevent the
  display of debug info.

src/Context.cpp

@@ -65,10 +65,13 @@ Context::~Context ()
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-void Context::initialize (int argc, const char** argv)
+int Context::initialize (int argc, const char** argv)
 {
   Timer t ("Context::initialize");
+  int rc = 0;
 
+  try
+  {
     // char** argv --> std::vector <std::string> Context::args.
     // TODO Handle "cal" case here.
     args.capture (argc, argv);
@@ -146,6 +149,32 @@ void Context::initialize (int argc, const char** argv)
     hooks.trigger ("on-launch");
   }
 
+  catch (const std::string& error)
+  {
+    footnote (error);
+    rc = 2;
+  }
+
+  catch (...)
+  {
+    footnote (STRING_UNKNOWN_ERROR);
+    rc = 3;
+  }
+
+  // Dump all debug messages, controlled by rc.debug.
+  if (rc && config.getBoolean ("debug"))
+  {
+    std::vector <std::string>::iterator d;
+    for (d = debugMessages.begin (); d != debugMessages.end (); ++d)
+      if (color ())
+        std::cout << colorizeDebug (*d) << "\n";
+      else
+        std::cout << *d << "\n";
+  }
+
+  return rc;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 int Context::run ()
 {

src/Context.h

@@ -50,7 +50,7 @@ public:
   Context (const Context&);
   Context& operator= (const Context&);
 
-  void initialize (int, const char**); // all startup
+  int initialize (int, const char**);  // all startup
   int run ();
   int dispatch (std::string&);         // command handler dispatch
   void shadow ();                      // shadow file update

src/main.cpp

@@ -61,7 +61,8 @@ int main (int argc, const char** argv)
 
   try
   {
-    context.initialize (argc, argv);
+    status = context.initialize (argc, argv);
+    if (status == 0)
       status = context.run ();
   }