Only copy modified files

When copying a file, if a file already exists at the destination path
with the same last-modified date and the same size, the file is not
copied.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/entry.rs b/src/entry.rs
index 72eeb7e..1b6b577 100644
--- a/src/entry.rs
+++ b/src/entry.rs
@@ -1,6 +1,9 @@
-use std::path::{Path, PathBuf};
 use crate::*;
 
+use std::path::{Path, PathBuf};
+use std::time::SystemTime;
+
+
 #[derive(PartialEq)]
 pub enum EntryType {
     File,
@@ -17,6 +20,8 @@ pub struct Entry {
     pub path: PathBuf,
     /// The file path as originally presented to the [Entry] constructor.
     pub original_path: PathBuf,
+    /// Not available on all platforms.
+    pub last_modified: Option<SystemTime>,
 }
 
 impl Entry {
@@ -51,6 +56,7 @@ impl Entry {
             path: canonical_path,
             original_path: path.to_path_buf(),
             is_symlink: metadata.is_symlink(),
+            last_modified: metadata.modified().ok(),
         })
     }