Some changes

crates/composefs-ctl/Cargo.toml

@@ -30,7 +30,7 @@ rhel9 = ['composefs/rhel9']
 [dependencies]
 anyhow = { version = "1.0.87", default-features = false }
 fn-error-context = "0.2"
-clap = { version = "4.5.0", default-features = false, features = ["std", "help", "usage", "derive", "wrap_help"] }
+clap = { version = "4.5.0", default-features = false, features = ["std", "help", "usage", "derive", "wrap_help", "error-context", "suggestions"] }
 clap_complete = { version = "4.5.0", default-features = false, features = ["unstable-dynamic"] }
 comfy-table = { version = "7.1", default-features = false }
 composefs = { workspace = true, features = ["varlink"] }

crates/composefs-ctl/src/lib.rs

@@ -1520,11 +1520,25 @@ async fn load_filesystem_from_ondisk_fs<ObjectID: FsVerityHashValue>(
     Ok(fs)
 }
 
-fn dump_file_impl(
-    fs: FileSystem<RegularFile<impl FsVerityHashValue>>,
+/// Print file information from a composefs filesystem for the given paths
+///
+/// For each path in `files`, looks up the entry in the filesystem and either
+/// outputs composefs dumpfile-format metadata or, when `backing_path_only` is
+/// set, prints whether the file is stored inline or its object-relative path.
+/// Directory paths have their contents listed.
+pub fn dump_files<ObjectID: FsVerityHashValue>(
+    repo: &Repository<ObjectID>,
+    image_name: &str,
     files: &Vec<PathBuf>,
     backing_path_only: bool,
 ) -> Result<()> {
+    let (img_fd, _) = repo.open_image(image_name)?;
+
+    let mut img_buf = Vec::new();
+    std::fs::File::from(img_fd).read_to_end(&mut img_buf)?;
+
+    let fs = erofs_to_filesystem::<ObjectID>(&img_buf)?;
+
     let mut out = Vec::new();
     let nlink_map = fs.nlinks();
 
@@ -2267,16 +2281,7 @@ where
             files,
             backing_path_only,
         } => {
-            let (img_fd, _) = repo.open_image(&image_name)?;
-
-            let mut img_buf = Vec::new();
-            std::fs::File::from(img_fd).read_to_end(&mut img_buf)?;
-
-            dump_file_impl(
-                erofs_to_filesystem::<ObjectID>(&img_buf)?,
-                &files,
-                backing_path_only,
-            )?;
+            dump_files(&repo, &image_name, &files, backing_path_only)?;
         }
         Command::Fsck {
             json,