feat(clap): parse structure and build App

We are currently setting everything up at runtime, and manage to get
nearly all information into it, except for the more complex
`-u (simple|resumable) <file> <mime>` flag.

Fixes #87
Related to #81

Author: Byron

src/mako/cli/lib/argparse.mako

@@ -37,15 +37,15 @@
     if mc.media_params:
         upload_protocols = [mp.protocol for mp in mc.media_params]
         mode = docopt_mode(upload_protocols)
-        args.append('-%s %s %s %s' % (UPLOAD_FLAG, mode, FILE_ARG, MIME_ARG))
+        args.append('-%s %s <%s> <%s>' % (UPLOAD_FLAG, mode, FILE_ARG, MIME_ARG))
     # end upload handling
 
     if mc.optional_props or parameters is not UNDEFINED:
         args.append('[-%s %s...]' % (PARAM_FLAG, '<%s>' % VALUE_ARG))
     # end paramters
     
     if mc.response_schema or mc.m.get('supportsMediaDownload', False):
-        args.append('[-%s %s]' % (OUTPUT_FLAG, OUT_ARG))
+        args.append('[-%s <%s>]' % (OUTPUT_FLAG, OUT_ARG))
     # handle output
 %>\
   ${util.program_name()} [options] ${mangle_subcommand(resource)} ${mangle_subcommand(method)} ${' '.join(args)}
@@ -226,5 +226,41 @@ let arg_data = [
 </%block>
 % endfor # end for each resource
 ];
+
+for &(main_command_name, ref subcommands) in &arg_data {
+    let mut mcmd = SubCommand::new(main_command_name);
+    for &(sub_command_name, ref desc, ref args) in subcommands {
+        let mut scmd = SubCommand::new(sub_command_name);
+        if let &Some(desc) = desc {
+            scmd = scmd.about(desc);
+        }
+        for &(ref arg_name, ref flag, ref desc, ref required, ref multi) in args {
+            let mut arg = Arg::with_name(match (arg_name, flag) {
+                                                (&Some(an), _) => an,
+                                                (_, &Some(f)) => f,
+                                                _ => unreachable!(),
+                                            });
+            if let &Some(short_flag) = flag {
+                arg = arg.short(short_flag);
+            }
+            if let &Some(desc) = desc {
+                arg = arg.help(desc);
+            }
+            if arg_name.is_some() && flag.is_some() {
+                arg = arg.takes_value(true);
+            }
+            if let &Some(required) = required {
+                arg = arg.required(required);
+            }
+            if let &Some(multi) = multi {
+                arg = arg.multiple(multi);
+            }
+            scmd = scmd.arg(arg);
+        }
+        mcmd = mcmd.subcommand(scmd);
+    }
+    app = app.subcommand(mcmd);
+}
+let matches = app.get_matches();
 </%block>
 </%def>

src/mako/cli/lib/cli.py

@@ -20,9 +20,9 @@
 DEBUG_FLAG = 'debug'
 DEBUG_AUTH_FLAG = 'debug-auth'
 
-FILE_ARG = '<file>'
-MIME_ARG = '<mime>'
-OUT_ARG = '<out>'
+FILE_ARG = 'file'
+MIME_ARG = 'mime'
+OUT_ARG = 'out'
 
 FIELD_SEP = '.'
 

src/mako/cli/lib/engine.mako

@@ -29,7 +29,7 @@
 %>\
 mod cmn;
 use cmn::{InvalidOptionsError, CLIError, JsonTokenStorage, arg_from_str, writer_from_opts, parse_kv_arg, 
-          input_file_from_opts, input_mime_from_opts, FieldCursor, FieldError, make_subcommand};
+          input_file_from_opts, input_mime_from_opts, FieldCursor, FieldError};
 
 use std::default::Default;
 use std::str::FromStr;

src/rust/cli/cmn.rs

@@ -16,22 +16,6 @@ use std::default::Default;
 
 const FIELD_SEP: char = '.';
 
-
-fn make_subcommand(command_name: &str, desc: Option<&str>,
-                                       args: &Vec<(Option<&str>, Option<&str>, Option<&str>, 
-                                                   Option<bool>, Option<bool>)>)
-                                                   -> App<'a, 'v, 'ab, 'u, 'h, 'ar> {
-   // arg_name: Option<&str>,
-   // short_name: Option<&str>,
-   // help: Option<&str>,
-   // % if flag is not None:
-   //                      .takes_value(${rust_boolean(arg_name)})
-   // required: Option<bool>,
-   // multiple: Option<bool>
-    SubCommand::new(command_name)
-}
-
-
 #[derive(Clone, Default)]
 pub struct FieldCursor(Vec<String>);