fix: Prevent recursive copy

Cargo.toml

@@ -14,15 +14,15 @@ keywords = ["copy", "recursive", "filesystem", "file"]
 default = ["jwalk"]
 
 [dependencies]
-walkdir = "2.3"
+walkdir = "2.4"
 log = "0.4"
 # rayon = "1.4.0"
 jwalk = { version = "0.8", optional = true }
 
 [dev-dependencies]
 unzip = "0.1"
 reqwest = { version = "0.11", features = ["blocking"] }
-env_logger = "0.10"
+env_logger = "0.11"
 criterion = "0.5"
 
 [[bench]]

src/lib.rs

@@ -245,7 +245,11 @@ impl CopyBuilder {
             abs_dest.display()
         );
 
-        'files: for entry in WalkDir::new(&abs_source).into_iter().filter_map(|e| e.ok()) {
+        'files: for entry in WalkDir::new(&abs_source)
+            .into_iter()
+            .filter_entry(|e| e.path() != abs_dest)
+            .filter_map(|e| e.ok())
+        {
             let rel_dest = entry.path().strip_prefix(&abs_source).map_err(|e| {
                 Error::new(ErrorKind::Other, format!("Could not strip prefix: {:?}", e))
             })?;

src/tests.rs

@@ -47,6 +47,26 @@ fn copy_basic() {
     std::fs::remove_dir_all("dest").unwrap();
 }
 
+
+#[test]
+fn copy_subdir() {
+    std::env::set_var("RUST_LOG", "debug");
+    let _ = env_logger::try_init();
+    create_dir_all("source/subdir").unwrap();
+    create_dir_all("source/this_should_copy").unwrap();
+    File::create("source/this_should_copy/file.doc").unwrap();
+    File::create("source/a.jpg").unwrap();
+    File::create("source/b.jpg").unwrap();
+    File::create("source/d.txt").unwrap();
+
+    CopyBuilder::new("source", "source/subdir")
+    .run()
+    .unwrap();
+
+    // std::fs::remove_dir_all("source").unwrap();
+}
+
+
 #[test]
 fn copy_exclude() {
     std::env::set_var("RUST_LOG", "DEBUG");