pxar: extract PxarExtractOptions

same as PxarCreateOptions, but for extraction/restore rather than
create.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

src/bin/proxmox-backup-client.rs

@@ -1354,20 +1354,24 @@ async fn restore(param: Value) -> Result<Value, Error> {
 
         let mut reader = BufferedDynamicReader::new(index, chunk_reader);
 
+        let options = proxmox_backup::pxar::PxarExtractOptions {
+            match_list: &[],
+            extract_match_default: true,
+            allow_existing_dirs,
+            on_error: None,
+        };
+
         if let Some(target) = target {
             proxmox_backup::pxar::extract_archive(
                 pxar::decoder::Decoder::from_std(reader)?,
                 Path::new(target),
-                &[],
-                true,
                 proxmox_backup::pxar::Flags::DEFAULT,
-                allow_existing_dirs,
                 |path| {
                     if verbose {
                         println!("{:?}", path);
                     }
                 },
-                None,
+                options,
             )
             .map_err(|err| format_err!("error extracting archive - {}", err))?;
         } else {

src/bin/pxar.rs

@@ -17,31 +17,26 @@ use proxmox::api::cli::*;
 use proxmox::api::api;
 
 use proxmox_backup::tools;
-use proxmox_backup::pxar::{fuse, format_single_line_entry, ENCODER_MAX_ENTRIES, ErrorHandler, Flags};
+use proxmox_backup::pxar::{fuse, format_single_line_entry, ENCODER_MAX_ENTRIES, Flags, PxarExtractOptions};
 
 fn extract_archive_from_reader<R: std::io::Read>(
     reader: &mut R,
     target: &str,
     feature_flags: Flags,
-    allow_existing_dirs: bool,
     verbose: bool,
-    match_list: &[MatchEntry],
-    extract_match_default: bool,
-    on_error: Option<ErrorHandler>,
+    options: PxarExtractOptions,
 ) -> Result<(), Error> {
+
     proxmox_backup::pxar::extract_archive(
         pxar::decoder::Decoder::from_std(reader)?,
         Path::new(target),
-        &match_list,
-        extract_match_default,
         feature_flags,
-        allow_existing_dirs,
         |path| {
             if verbose {
                 println!("{:?}", path);
             }
         },
-        on_error,
+        options,
     )
 }
 
@@ -190,6 +185,13 @@ fn extract_archive(
         }) as Box<dyn FnMut(Error) -> Result<(), Error> + Send>)
     };
 
+    let options = PxarExtractOptions {
+        match_list: &match_list,
+        allow_existing_dirs,
+        extract_match_default,
+        on_error,
+    };
+
     if archive == "-" {
         let stdin = std::io::stdin();
         let mut reader = stdin.lock();
@@ -197,11 +199,8 @@ fn extract_archive(
             &mut reader,
             &target,
             feature_flags,
-            allow_existing_dirs,
             verbose,
-            &match_list,
-            extract_match_default,
-            on_error,
+            options,
         )?;
     } else {
         if verbose {
@@ -213,11 +212,8 @@ fn extract_archive(
             &mut reader,
             &target,
             feature_flags,
-            allow_existing_dirs,
             verbose,
-            &match_list,
-            extract_match_default,
-            on_error,
+            options,
         )?;
     }
 
@@ -297,6 +293,7 @@ fn extract_archive(
     },
 )]
 /// Create a new .pxar archive.
+#[allow(clippy::too_many_arguments)]
 fn create_archive(
     archive: String,
     source: String,

src/pxar/extract.rs

@@ -24,17 +24,21 @@ use crate::pxar::dir_stack::PxarDirStack;
 use crate::pxar::metadata;
 use crate::pxar::Flags;
 
+pub struct PxarExtractOptions<'a> {
+    pub match_list: &'a[MatchEntry],
+    pub extract_match_default: bool,
+    pub allow_existing_dirs: bool,
+    pub on_error: Option<ErrorHandler>,
+}
+
 pub type ErrorHandler = Box<dyn FnMut(Error) -> Result<(), Error> + Send>;
 
 pub fn extract_archive<T, F>(
     mut decoder: pxar::decoder::Decoder<T>,
     destination: &Path,
-    match_list: &[MatchEntry],
-    extract_match_default: bool,
     feature_flags: Flags,
-    allow_existing_dirs: bool,
     mut callback: F,
-    on_error: Option<ErrorHandler>,
+    options: PxarExtractOptions,
 ) -> Result<(), Error>
 where
     T: pxar::decoder::SeqRead,
@@ -69,17 +73,17 @@ where
     let mut extractor = Extractor::new(
         dir,
         root.metadata().clone(),
-        allow_existing_dirs,
+        options.allow_existing_dirs,
         feature_flags,
     );
 
-    if let Some(on_error) = on_error {
+    if let Some(on_error) = options.on_error {
         extractor.on_error(on_error);
     }
 
     let mut match_stack = Vec::new();
     let mut err_path_stack = vec![OsString::from("/")];
-    let mut current_match = extract_match_default;
+    let mut current_match = options.extract_match_default;
     while let Some(entry) = decoder.next() {
         use pxar::EntryKind;
 
@@ -99,7 +103,7 @@ where
 
         extractor.set_path(entry.path().as_os_str().to_owned());
 
-        let match_result = match_list.matches(
+        let match_result = options.match_list.matches(
             entry.path().as_os_str().as_bytes(),
             Some(metadata.file_type() as u32),
         );

src/pxar/mod.rs

@@ -59,7 +59,7 @@ mod flags;
 pub use flags::Flags;
 
 pub use create::{create_archive, PxarCreateOptions};
-pub use extract::{extract_archive, ErrorHandler};
+pub use extract::{extract_archive, ErrorHandler, PxarExtractOptions};
 
 /// The format requires to build sorted directory lookup tables in
 /// memory, so we restrict the number of allowed entries to limit