[commandline] add basic option parsing.

Bringing some more features in will be easier with options.

src/main.c

@@ -1,6 +1,8 @@
 #include <Elementary.h>
 #ifndef ELM_LIB_QUICKLAUNCH
 
+#include <Ecore_Getopt.h>
+
 #include "Equate.h"
 #include "calc.h"
 
@@ -53,6 +55,7 @@ static const struct
   NULL
 };
 
+#define COPYRIGHT "Copyright © 2004-2015 Andy Williams <andy@andyilliams.me>, \nNicolas Aguirre <aguirre.nicolas@gmail.com> \nand various contributors (see AUTHORS)."
 
 static void
 _button_cb(void *data, Evas_Object * o EINA_UNUSED,
@@ -293,9 +296,47 @@ _create_gui(void)
    _create_buttons(table);
 }
 
+static const Ecore_Getopt optdesc = {
+  "equate",
+  "%prog [options]",
+  PACKAGE_VERSION,
+  COPYRIGHT,
+  "TODO check license",
+  "A calculator written with Enlightenment Foundation Libraries",
+  EINA_TRUE,
+  {
+//    ECORE_GETOPT_LICENSE('L', "license"),
+    ECORE_GETOPT_COPYRIGHT('C', "copyright"),
+    ECORE_GETOPT_VERSION('V', "version"),
+    ECORE_GETOPT_HELP('h', "help"),
+    ECORE_GETOPT_SENTINEL
+  }
+};
+
 EAPI_MAIN int
 elm_main(int argc, char **argv)
 {
+   int args;
+   Eina_Bool quit_option = EINA_FALSE;
+
+   Ecore_Getopt_Value values[] = {
+//     ECORE_GETOPT_VALUE_BOOL(quit_option),
+     ECORE_GETOPT_VALUE_BOOL(quit_option),
+     ECORE_GETOPT_VALUE_BOOL(quit_option),
+     ECORE_GETOPT_VALUE_BOOL(quit_option),
+     ECORE_GETOPT_VALUE_NONE
+   };
+
+   args = ecore_getopt_parse(&optdesc, values, argc, argv);
+   if (args < 0)
+     {
+        EINA_LOG_CRIT("Could not parse arguments.");
+        return 1;
+     }
+   else if (quit_option)
+     {
+        return 0;
+     }
 
    elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);
    elm_app_compile_bin_dir_set(PACKAGE_BIN_DIR);