implement required named arguments

src/command.rs

@@ -32,6 +32,7 @@ impl Command {
                 long: "verbose".to_string(),
                 multiple: false,
                 takes_value: false,
+                required: false,
                 validate_as_number: false,
                 val: "".to_string(),
             });
@@ -85,6 +86,7 @@ pub struct OptionFlag {
     pub multiple: bool,           // Can it have multiple values? (-vvv OR -i one -i two)
     pub takes_value: bool,        // Does it take a value? (-i value)
     pub validate_as_number: bool, // Should we validate it as a number?
+    pub required: bool,
     pub val: String,
 }
 
@@ -97,6 +99,7 @@ impl OptionFlag {
             long: "".to_string(),
             multiple: false,
             takes_value: false,
+            required: false,
             validate_as_number: false,
             val: "".to_string(),
         }

src/main.rs

@@ -101,20 +101,21 @@ fn build_subcommands<'a, 'b>(
             }
         }
 
-        // Add all required arguments
+        // Add all positional arguments
         for a in &c.required_args {
             let arg = Arg::with_name(&a.name).required(true);
             subcmd = subcmd.arg(arg);
         }
 
-        // Add all optional flags
+        // Add all named flags
         for f in &c.option_flags {
             let arg = Arg::with_name(&f.name)
                 .help(&f.desc)
                 .short(&f.short)
                 .long(&f.long)
                 .takes_value(f.takes_value)
-                .multiple(f.multiple);
+                .multiple(f.multiple)
+                .required(f.required);
             subcmd = subcmd.arg(arg);
         }
         cli_app = cli_app.subcommand(subcmd);

src/parser.rs

@@ -129,6 +129,9 @@ pub fn build_command_structure(maskfile_contents: String) -> Command {
                                 }
                             }
                         }
+                        "required" => {
+                            current_option_flag.required = true;
+                        }
                         _ => (),
                     };
                 }