add read config

src/main.rs

@@ -29,6 +29,10 @@ fn main() -> XResult<()> {
         return Ok(());
     }
 
+    if options.verbose {
+        print_message(MessageType::DEBUG, &format!("Config is: {}", &options.config));
+    }
+
     println!("Hello, world!");
     println!("{}", SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs());
 
@@ -44,7 +48,13 @@ fn main() -> XResult<()> {
     // let openpgp_client = OpenPGPTool::from_file("sample.gpg")?;
     // openpgp_client.encrypt_file("a", "b.asc", true)?;
 
-    let config_json = get_config_json(None); // TODO
+    let config_json = get_config_json(if  options.config == "" { None } else { Some(&options.config) });
+    if config_json.is_none() {
+        return Ok(());
+    }
+
+    // TODO ...
+
     
     // let j = config_json.unwrap();
     // println!("{}", j);