From d8cf3d3a78bf8e143a4839ab540ac30e29868ba5 Mon Sep 17 00:00:00 2001
From: bnewbold <bnewbold@robocracy.org>
Date: Sat, 29 Oct 2016 17:18:17 -0700
Subject: expand scope of mt-tool

---
 src/bin/mt-tool.rs | 82 ++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 67 insertions(+), 15 deletions(-)

diff --git a/src/bin/mt-tool.rs b/src/bin/mt-tool.rs
index d71a2eb..803bc46 100644
--- a/src/bin/mt-tool.rs
+++ b/src/bin/mt-tool.rs
@@ -1,22 +1,20 @@
 
 extern crate modelthing;
 extern crate rustc_serialize;
-extern crate docopt;
+extern crate getopts;
 
 use modelthing::modelica_parser;
-use docopt::Docopt;
+use getopts::Options;
 use std::env;
 use std::io::Read;
 use std::fs::File;
+use std::path::Path;
 use std::time::Instant;
+use std::process::exit;
 
 
-fn main() {
-    let args: Args = Docopt::new(USAGE)
-                        .and_then(|d| d.argv(env::args()).decode())
-                        .unwrap_or_else(|e| e.exit());
-
-    for input in &args.arg_inputs {
+fn parse_modelica_files(paths: Vec<String>) {
+    for input in &paths {
         let mut s = String::new();
         if let Err(err) = File::open(input).and_then(|mut f| f.read_to_string(&mut s)) {
             println!("Input `{}`: I/O Error {}",
@@ -36,12 +34,66 @@ fn main() {
     }
 }
 
-const USAGE: &'static str = "
-Usage: modelthing-modelica <inputs>...
-Parses each input file.
-";
+fn print_usage(opts: Options) {
+    let brief = "usage:\tmt-tool <CMD> [options]";
+    println!("");
+    print!("{}", opts.usage(&brief));
+    println!("Commands:\n\
+        \tparse <file>  checks that file contains a valid modelica model\n\
+        \tlist          dumps all the known models in database\n\
+        \tload <dir>    checks that directory contains valid model and metadata\n\
+");
+}
+
+fn main() {
+
+    let args: Vec<String> = env::args().collect();
+
+    let mut opts = Options::new();
+    opts.optflag("h", "help", "print this help menu");
+    opts.optflag("", "version", "print the version");
+
+    let matches = match opts.parse(&args[1..]) {
+        Ok(m) => m,
+        Err(f) => {
+            println!("{}\n", f.to_string());
+            print_usage(opts);
+            exit(-1);
+        }
+    };
+
+    if matches.opt_present("help") {
+        print_usage(opts);
+        return;
+    }
+
+    if matches.opt_present("version") {
+        println!("modelthing {}", env!("CARGO_PKG_VERSION"));
+        return;
+    }
+
+    if matches.free.is_empty() {
+        println!("At least a CMD is required; see --help");
+        exit(-1);
+    }
 
-#[derive(Debug, RustcDecodable)]
-struct Args {
-    arg_inputs: Vec<String>,
+    let cmd = matches.free[0].clone();
+    match cmd.as_str() {
+        "parse" => { parse_modelica_files(matches.free[1..].iter().map(|x| x.to_string()).collect()); },
+        "list" => {
+            // XXX: search path?
+            for m in modelthing::search_models(Path::new("examples")) {
+                println!("{}", m)
+            }
+        },
+        "load" => {
+            if matches.free.len() != 2 {
+                println!("Expected a single path to load");
+                exit(-1);
+            }
+            let me = modelthing::load_model_entry(Path::new(&matches.free[1])).unwrap();
+            println!("{:?}", me);
+        },
+        unknown => { println!("Unknown command: {}", unknown); exit(-1); },
+    }
 }
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