add a simple CLI

src/bin/task.rs

@@ -0,0 +1,39 @@
+extern crate clap;
+use clap::{App, Arg, SubCommand};
+use ot::{Replica, DB};
+use uuid::Uuid;
+
+fn main() {
+    let matches = App::new("Rask")
+        .version("0.1")
+        .author("Dustin J. Mitchell <dustin@v.igoro.us>")
+        .about("Replacement for TaskWarrior")
+        .subcommand(
+            SubCommand::with_name("add")
+                .about("adds a task")
+                .arg(Arg::with_name("title").help("task title").required(true)),
+        )
+        .subcommand(SubCommand::with_name("list").about("lists tasks"))
+        .get_matches();
+
+    let mut replica = Replica::new(DB::new().into());
+
+    match matches.subcommand() {
+        ("add", Some(matches)) => {
+            let uuid = Uuid::new_v4();
+            replica.create_task(uuid).unwrap();
+            replica
+                .update_task(uuid, "title", Some(matches.value_of("title").unwrap()))
+                .unwrap();
+        }
+        ("list", _) => {
+            for task in replica.all_tasks() {
+                println!("{:?}", task);
+            }
+        }
+        ("", None) => {
+            unreachable!();
+        }
+        _ => unreachable!(),
+    };
+}