cli.rs: Add possibility to fetch editor

etc/cli.yml

@@ -22,6 +22,12 @@ args:
         required: false
         takes_value: true
 
+    - editor:
+        short: e
+        long: editor
+        help: Set editor, if not set $EDITOR of the system will be asked, else vim
+        required: false
+        takes_value: true
 
     - storename:
         short: s

src/cli.rs

@@ -47,6 +47,10 @@ impl<'a> CliConfig<'a> {
                 .and_then(|s| Some(rtp + s))
         })
     }
+
+    pub fn editor(&self) -> Option<String> {
+        self.cli_matches.value_of("editor").and_then(|s| Some(String::from(s)))
+    }
 }
 
 impl<'a> Debug for CliConfig<'a> {