Add '-b'/'--apparent-size' option

This commit changes `diskus` default behavior: we now report "disk
usage" instead of "apparent size" in analogy to "du -sh".

At the same time however, we introduce a new `--apparent-size` option
which can be used to switch back to "apparent size".

closes #25

1 files changed, 5 insertions, 3 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 0867b2b..5f2b447 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,15 +2,17 @@
 //!
 //! ```
 //! use std::path::PathBuf;
-//! use diskus::Walk;
+//! use diskus::{Walk, FilesizeType};
 //!
 //! let num_threads = 4;
 //! let root_directories = &[PathBuf::from(".")];
-//! let walk = Walk::new(root_directories, num_threads);
+//! let walk = Walk::new(root_directories, num_threads, FilesizeType::DiskUsage);
 //! let (size_in_bytes, errors) = walk.run();
 //! ```
 
+mod filesize;
 mod unique_id;
 pub mod walk;
 
-pub use crate::walk::Walk;
+pub use crate::filesize::FilesizeType;
+pub use crate::walk::{Error, Walk};