Add bin using crate clokwerk.

src/bin/using-crate-clokwerk.rs

@@ -0,0 +1,38 @@
+// Scheduler, and trait for .seconds(), .minutes(), etc.
+use clokwerk::{Job, Scheduler, TimeUnits};
+// Import week days and WeekDay
+use clokwerk::Interval::*;
+use std::thread;
+use std::time::Duration;
+
+fn main() {
+    // Create a new scheduler
+    //let mut scheduler = Scheduler::new();
+    // or a scheduler with a given timezone
+    let mut scheduler = Scheduler::with_tz(chrono::Utc);
+    // Add some tasks to it
+    scheduler
+        .every(10.minutes())
+        .plus(30.seconds())
+        .run(|| println!("Periodic task"));
+    scheduler
+        .every(1.day())
+        .at("3:20 pm")
+        .run(|| println!("Daily task"));
+    scheduler
+        .every(Tuesday)
+        .at("14:20:17")
+        .and_every(Thursday)
+        .at("15:00")
+        .run(|| println!("Biweekly task"));
+
+    // Manually run the scheduler in an event loop
+    for _ in 1..10 {
+        scheduler.run_pending();
+        thread::sleep(Duration::from_millis(10));
+    }
+    // Or run it in a background thread
+    let thread_handle = scheduler.watch_thread(Duration::from_millis(100));
+    // The scheduler stops when `thread_handle` is dropped, or `stop` is called
+    thread_handle.stop();
+}