fix(style): nightly clippy (#99)

* style(sequence decoder): migrate .is_some() -> .unwrap to if let to make clippy happy

* feat(cli): replace unix specific code with os generic variant

Author: zleyyij

cli/src/main.rs

@@ -4,7 +4,6 @@ use progress::ProgressMonitor;
 
 use std::fs::File;
 use std::io::BufReader;
-use std::os::unix::fs::MetadataExt;
 use std::path::Path;
 use std::path::PathBuf;
 
@@ -134,7 +133,7 @@ fn compress(input: PathBuf, output: PathBuf, level: u8) -> color_eyre::Result<()
 fn decompress(input: PathBuf, output: PathBuf) -> color_eyre::Result<()> {
     info!("extracting {input:?} to {output:?}");
     let source_file = File::open(input).wrap_err("failed to open input file")?;
-    let source_size = source_file.metadata()?.size() as usize;
+    let source_size = source_file.metadata()?.len() as usize;
     let buffered_source = BufReader::new(source_file);
     let decoder_input = ProgressMonitor::new(buffered_source, source_size);
     let mut output: File =

ruzstd/src/decoding/sequence_section_decoder.rs

@@ -71,18 +71,18 @@ fn decode_sequences_with_rle(
 
     for _seq_idx in 0..section.num_sequences {
         //get the codes from either the RLE byte or from the decoder
-        let ll_code = if scratch.ll_rle.is_some() {
-            scratch.ll_rle.unwrap()
+        let ll_code = if let Some(ll_rle) = scratch.ll_rle {
+            ll_rle
         } else {
             ll_dec.decode_symbol()
         };
-        let ml_code = if scratch.ml_rle.is_some() {
-            scratch.ml_rle.unwrap()
+        let ml_code = if let Some(ml_rle) = scratch.ml_rle {
+            ml_rle
         } else {
             ml_dec.decode_symbol()
         };
-        let of_code = if scratch.of_rle.is_some() {
-            scratch.of_rle.unwrap()
+        let of_code = if let Some(of_rle) = scratch.of_rle {
+            of_rle
         } else {
             of_dec.decode_symbol()
         };