Make it work with macOS

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dutree"
-version = "0.2.6"
+version = "0.2.7"
 authors = ["nacho <nacho@ownyourbits.com>"]
 description = "Command line tool to analyze disk usage"
 repository = "https://github.com/nachoparker/dutree"

src/lib.rs

@@ -52,11 +52,14 @@ use regex::Regex;
 use std::io;
 use std::path::{Path, PathBuf};
 use std::fs;
+#[cfg(target_os = "linux")]
 use std::os::linux::fs::MetadataExt;
+#[cfg(target_os = "macos")]
+use std::os::unix::fs::MetadataExt;
 use std::env;
 use std::collections::HashMap;
 
-const VERSTR    : &str = "v0.2.6";
+const VERSTR    : &str = "v0.2.7";
 const DEF_WIDTH : u16  = 80;
 
 pub enum XResult<T,S> {
@@ -227,7 +230,10 @@ fn try_read_dir( path : &Path ) -> Option<fs::ReadDir> {
 fn try_bytes_from_path( path : &Path, usage_flag : bool ) -> u64 {
 
     match path.symlink_metadata() {
+        #[cfg(target_os = "linux")]
         Ok(metadata) => if usage_flag { metadata.st_blocks()*512 } else { metadata.st_size() },
+        #[cfg(target_os = "macos")]
+        Ok(metadata) => if usage_flag { metadata.blocks()*512 } else { metadata.size() },
         Err(err)     => { 
             print_io_error( path, err );
             0
@@ -480,7 +486,10 @@ fn color_from_path<'a>( path : &Path, color_dict : &'a HashMap<String, String> )
     }
     let metadata = path.symlink_metadata();
     if metadata.is_ok() {
+        #[cfg(target_os = "linux")]
         let mode = metadata.unwrap().st_mode();
+        #[cfg(target_os = "macos")]
+        let mode = metadata.unwrap().mode();
         if path.is_dir() {
             if mode & 0o002 != 0 {  // dir other writable
                 if let Some( col ) = color_dict.get( &"ow".to_string() ) {