design: start adding args to subcommands and global

Signed-off-by: Paul Osborne <[email protected]>

Author: posborne

src/main.rs

@@ -6,22 +6,76 @@ fn main() {
     let gpio_cmd_matches = App::new("GPIO Utils")
         .version(env!("CARGO_PKG_VERSION"))
         .about("Read, Write, and Configure GPIOs")
+
+        // Global options
+        .arg(Arg::with_name("config")
+             .help("additional configuration to use")
+             .takes_value(true)
+             .short("c")
+             .long("config")
+             .multiple(true)
+             .required(false))
+
+        // gpio read
         .subcommand(SubCommand::with_name("read")
-                    .about("Read the value of a GPIO Input"))
+                    .about("Read the value of a GPIO Input")
+                    .arg(Arg::with_name("pin")
+                         .help("The pin name (or number)")
+                         .index(1)
+                         .required(true)))
+
+        // gpio poll
         .subcommand(SubCommand::with_name("poll")
-                    .about("Wait for an event to happen on an GPIO Input"))
+                    .about("Wait for an event to happen on an GPIO Input")
+                    .arg(Arg::with_name("pin")
+                         .help("The pin name (or number)")
+                         .index(1)
+                         .required(true)))
+
+        // gpio write
         .subcommand(SubCommand::with_name("write")
-                    .about("Write the value of a GPIO Output"))
+                    .about("Write the value of a GPIO Output")
+                    .arg(Arg::with_name("pin")
+                         .help("The pin name (or number)")
+                         .index(1)
+                         .required(true)))
+
+        // gpio export
         .subcommand(SubCommand::with_name("export")
-                    .about("Export a given GPIO"))
+                    .about("Export a given GPIO")
+                    .arg(Arg::with_name("pin")
+                         .help("The pin name (or number)")
+                         .index(1)
+                         .required(true)))
+
+        // gpio export-all
         .subcommand(SubCommand::with_name("export-all")
                     .about("Export all configured GPIOs"))
+
+        // gpio unexport
         .subcommand(SubCommand::with_name("unexport")
-                    .about("Unexport a given GPIO"))
+                    .about("Unexport a given GPIO")
+                    .arg(Arg::with_name("pin")
+                         .help("The pin name (or number)")
+                         .index(1)
+                         .required(true)))
+
+        // gpio unexport-all
         .subcommand(SubCommand::with_name("unexport-all")
-                    .about("Unexport all configured, exported GPIOs"))
+                    .about("Unexport all configured, exported GPIOs")
+                    .arg(Arg::with_name("pin")
+                         .help("The pin name (or number)")
+                         .index(1)
+                         .required(true)))
+
+        // gpio status
         .subcommand(SubCommand::with_name("status")
-                    .about("Output status of all configured GPIOs"))
+                    .about("Output status of all configured GPIOs")
+                    .arg(Arg::with_name("pin")
+                         .help("The pin name (or number)")
+                         .index(1)
+                         .required(false)))
+
         .get_matches();
 
     match gpio_cmd_matches.subcommand() {