Optionally run rsync

src/main.rs

@@ -14,7 +14,9 @@ use cursive::views::{Checkbox, Dialog, ListView, ProgressBar, TextView};
 use cursive::Cursive;
 use failure::Error;
 use std::ffi::OsStr;
+use std::os::unix::process::CommandExt;
 use std::path::PathBuf;
+use std::process::Command;
 use std::sync::{Arc, Mutex};
 
 use registry::Registry;
@@ -145,10 +147,27 @@ fn save_albums(ui: &mut Cursive) {
 
     ui.pop_layer();
     ui.add_layer(
-        Dialog::around(TextView::new("All albums have been saved!")).button("Ok", |ui| ui.quit()),
+        Dialog::around(TextView::new("All albums have been saved!\nSynchronise?"))
+            .button("Yes", |ui| sync_albums(ui))
+            .button("No", |ui| ui.quit()),
     );
 }
 
+fn sync_albums(ui: &mut Cursive) {
+    let registry = REGISTRY.lock().unwrap();
+    ui.quit();
+
+    Command::new("echo")
+        .arg("rsync")
+        .arg("-vaP")
+        .arg(&format!("--include-from={}.list.new", registry.device))
+        .arg("--exclude=\"*\"")
+        .arg("--delete")
+        .arg(&registry.base_path)
+        .arg("target_path")
+        .exec();
+}
+
 fn quit(ui: &mut Cursive) {
     ui.quit();
 }