Fixes Bug 695, ledger ignores --init-file

Handle --init-file as a special command option like the debug options.
That wway we can have the argument captured before teh global scope is
created.

src/global.cc

@@ -44,6 +44,7 @@
 namespace ledger {
 
 static bool args_only = false;
+std::string       _init_file;
 
 global_scope_t::global_scope_t(char ** envp)
 {
@@ -126,6 +127,8 @@ void global_scope_t::read_init()
       }
 
       TRACE_FINISH(init, 1);
+    } else {
+      throw_(parse_error, _f("Could not find specified init file %1%") % init_file);
     }
   }
 }
@@ -473,6 +476,10 @@ void handle_debug_options(int argc, char * argv[])
         _log_level = LOG_INFO;
 #endif
       }
+      else if (i + 1 < argc && std::strcmp(argv[i], "--init-file") == 0) {
+	_init_file = argv[i + 1];
+	i++;
+      }
       else if (i + 1 < argc && std::strcmp(argv[i], "--debug") == 0) {
 #if DEBUG_ON
         _log_level    = LOG_DEBUG;  

src/global.h

@@ -46,6 +46,8 @@ namespace ledger {
 class session_t;
 class report_t;
 
+extern std::string       _init_file;
+
 class global_scope_t : public noncopyable, public scope_t
 {
   shared_ptr<session_t> session_ptr;
@@ -151,6 +153,10 @@ See LICENSE file included with the distribution for details and disclaimer.");
   OPTION__
   (global_scope_t, init_file_, // -i
    CTOR(global_scope_t, init_file_) {
+    if(!_init_file.empty())
+      // _init_file is filled during handle_debug_options
+      on(none, _init_file);
+    else
       if (const char * home_var = std::getenv("HOME"))
 	on(none, (path(home_var) / ".ledgerrc").string());
       else

src/main.cc

@@ -59,6 +59,7 @@ int main(int argc, char * argv[], char * envp[])
   //   --debug CATEGORY    ; turns on debug logging
   //   --trace LEVEL       ; turns on trace logging
   //   --memory            ; turns on memory usage tracing
+  //   --init-file         ; directs ledger to use a different init file
   handle_debug_options(argc, argv);
 #if VERIFY_ON
   IF_VERIFY() initialize_memory_tracing();