[thin_restore] first pass at btree_builder.

No tests yet

src/thin/device_detail.rs

@@ -19,7 +19,7 @@ impl fmt::Display for DeviceDetail {
               self.mapped_blocks,
               self.transaction_id,
               self.creation_time,
-              self.snapshotted_time);
+              self.snapshotted_time)?;
         Ok(())
     }
 }

src/thin/mod.rs

@@ -3,4 +3,5 @@ pub mod device_detail;
 pub mod superblock;
 pub mod check;
 pub mod dump;
+pub mod restore;
 pub mod xml;

src/thin/restore.rs

@@ -0,0 +1,31 @@
+use anyhow::Result;
+use std::collections::{BTreeMap, BTreeSet};
+use std::path::Path;
+use std::sync::{Arc, Mutex};
+
+use crate::io_engine::{AsyncIoEngine, IoEngine, SyncIoEngine};
+use crate::pdata::btree::{self, *};
+use crate::pdata::space_map::*;
+use crate::pdata::unpack::*;
+use crate::report::*;
+use crate::thin::block_time::*;
+use crate::thin::device_detail::*;
+use crate::thin::superblock::*;
+use crate::thin::xml::{self, MetadataVisitor};
+
+//------------------------------------------
+
+pub struct ThinRestoreOptions<'a> {
+    pub input: &'a Path,
+    pub output: &'a Path,
+    pub async_io: bool,
+    pub report: Arc<Report>,
+}
+
+//------------------------------------------
+
+pub fn restore(opts: ThinRestoreOptions) -> Result<()> {
+    todo!();
+}
+
+//------------------------------------------