⚗️ Add .mtree support

Author: ChanTsune

cli/src/command/core.rs

@@ -1,4 +1,6 @@
 pub(crate) mod iter;
+#[cfg(unix)]
+pub(crate) mod mtree;
 pub(crate) mod path;
 mod path_filter;
 pub(crate) mod path_lock;
@@ -1610,6 +1612,70 @@ pub(crate) fn transform_archive_entries<R: io::Read>(
 }
 
 /// Reads entries from an archive source (file or stdin) and transforms them.
+///
+/// This function auto-detects the format of the source:
+/// - PNA archive: Copies entries with optional transformation
+/// - mtree manifest: Reads files from filesystem with metadata overrides (Unix only)
+#[cfg(unix)]
+pub(crate) fn read_archive_source(
+    source: &ArchiveSource,
+    create_options: &CreateOptions,
+    filter: &PathFilter<'_>,
+    time_filters: &TimeFilters,
+    password: Option<&[u8]>,
+) -> io::Result<Vec<io::Result<Option<NormalEntry>>>> {
+    match source {
+        ArchiveSource::File(path) => {
+            let file = fs::File::open(path)
+                .map_err(|e| io::Error::new(e.kind(), format!("{}: {}", path.display(), e)))?;
+            let mut reader = io::BufReader::with_capacity(64 * 1024, file);
+
+            let format = mtree::detect_format(&mut reader)
+                .map_err(|e| io::Error::new(e.kind(), format!("{}: {}", path.display(), e)))?;
+
+            match format {
+                mtree::SourceFormat::Pna => transform_archive_entries(
+                    reader,
+                    create_options,
+                    filter,
+                    time_filters,
+                    password,
+                )
+                .map_err(|e| io::Error::new(e.kind(), format!("{}: {}", path.display(), e))),
+                mtree::SourceFormat::Mtree => {
+                    mtree::transform_mtree_entries(reader, create_options, filter, time_filters)
+                        .map_err(|e| io::Error::new(e.kind(), format!("{}: {}", path.display(), e)))
+                }
+            }
+        }
+        ArchiveSource::Stdin => {
+            let mut reader = io::BufReader::new(io::stdin().lock());
+
+            let format = mtree::detect_format(&mut reader)
+                .map_err(|e| io::Error::new(e.kind(), format!("<stdin>: {}", e)))?;
+
+            match format {
+                mtree::SourceFormat::Pna => transform_archive_entries(
+                    reader,
+                    create_options,
+                    filter,
+                    time_filters,
+                    password,
+                )
+                .map_err(|e| io::Error::new(e.kind(), format!("<stdin>: {}", e))),
+                mtree::SourceFormat::Mtree => {
+                    mtree::transform_mtree_entries(reader, create_options, filter, time_filters)
+                        .map_err(|e| io::Error::new(e.kind(), format!("<stdin>: {}", e)))
+                }
+            }
+        }
+    }
+}
+
+/// Reads entries from an archive source (file or stdin) and transforms them.
+///
+/// On non-Unix platforms, only PNA format is supported. mtree format is not available.
+#[cfg(not(unix))]
 pub(crate) fn read_archive_source(
     source: &ArchiveSource,
     create_options: &CreateOptions,