Add pluggable progressors

src/progress/mod.rs

@@ -0,0 +1,42 @@
+pub mod log;
+pub mod terminal;
+
+pub trait Progressor: Send {
+    fn run(&mut self);
+}
+
+fn human_bytes(bytes: u64) -> String {
+    let units = ["B", "kB", "MB", "GB", "TB"];
+
+    let mut value = bytes as f64;
+    let mut index = 0;
+    while value >= 1024.0 && index < units.len() - 1 {
+        value /= 1024.0;
+        index += 1;
+    }
+    format!("{:.2} {:2}", value, units[index])
+}
+
+pub enum BackupEvent {
+    Estimate(u64),
+    StartingFullBackup {
+        source: String,
+        dest: String,
+        index: usize,
+        total: usize,
+    },
+    StartingIncrementalBackup {
+        source: String,
+        dest: String,
+        index: usize,
+        total: usize,
+    },
+    SnapshotCreated(String),
+    SnapshotDeleted(String),
+    BytesTransferred {
+        bytes: u64,
+        estimated_total: Option<u64>,
+    },
+    DatasetCompleted(String),
+    DryrunCompleted(String),
+}