* add --sizesort/-S and sort by filesize

* modify display/fetch to also show folder size (they have sizes)

src/app.rs

@@ -140,6 +140,13 @@ pub fn build() -> App<'static, 'static> {
                 .multiple(true)
                 .help("Sort by time modified"),
         )
+        .arg(
+            Arg::with_name("sizesort")
+                .short("S")
+                .long("sizesort")
+                .multiple(true)
+                .help("Sort by size"),
+        )
         .arg(
             Arg::with_name("reverse")
                 .short("r")

src/core.rs

@@ -59,7 +59,6 @@ impl Core {
         let mut meta_list = self.fetch(paths);
 
         self.sort(&mut meta_list);
-
         self.display(meta_list)
     }
 

src/flags.rs

@@ -39,6 +39,8 @@ impl Flags {
 
         let sort_by = if matches.is_present("timesort") {
             SortFlag::Time
+        } else if matches.is_present("sizesort") {
+            SortFlag::Size
         } else {
             SortFlag::Name
         };
@@ -193,6 +195,7 @@ impl<'a> From<&'a str> for WhenFlag {
 pub enum SortFlag {
     Name,
     Time,
+    Size,
 }
 
 #[derive(Clone, Debug, Copy, PartialEq, Eq)]

src/meta/size.rs

@@ -16,49 +16,50 @@ pub enum Unit {
 pub struct Size {
     value: u64,
     unit: Unit,
+    bytes: u64,
 }
 
 impl<'a> From<&'a Metadata> for Size {
     fn from(meta: &Metadata) -> Self {
         let len = meta.len();
-
-        if meta.is_file() {
-            Self::from_bytes(len)
-        } else {
-            Self {
-                value: 0,
-                unit: Unit::None,
-            }
-        }
+        Self::from_bytes(len)
     }
 }
 
 impl Size {
+    pub fn get_bytes(&self) -> u64 {
+        self.bytes
+    }
     fn from_bytes(len: u64) -> Self {
         if len < 1024 {
             Self {
                 value: len * 1024,
                 unit: Unit::Byte,
+                bytes: len,
             }
         } else if len < 1024 * 1024 {
             Self {
                 value: len,
                 unit: Unit::Kilo,
+                bytes: len,
             }
         } else if len < 1024 * 1024 * 1024 {
             Self {
                 value: len / 1024,
                 unit: Unit::Mega,
+                bytes: len,
             }
         } else if len < 1024 * 1024 * 1024 * 1024 {
             Self {
                 value: len / (1024 * 1024),
                 unit: Unit::Giga,
+                bytes: len,
             }
         } else {
             Self {
                 value: len / (1024 * 1024 * 1024),
                 unit: Unit::Tera,
+                bytes: len,
             }
         }
     }

src/sort.rs

@@ -9,7 +9,11 @@ pub fn by_meta(a: &Meta, b: &Meta, flags: Flags) -> Ordering {
             DirOrderFlag::None => by_name(a, b, flags),
             DirOrderFlag::Last => by_name_with_files_first(a, b, flags),
         },
-
+        SortFlag::Size => match flags.directory_order {
+            DirOrderFlag::First => by_size(a, b, flags),
+            DirOrderFlag::None => by_size(a, b, flags),
+            DirOrderFlag::Last => by_size(a, b, flags),
+        },
         SortFlag::Time => match flags.directory_order {
             DirOrderFlag::First => by_date_with_dirs_first(a, b, flags),
             DirOrderFlag::None => by_date(a, b, flags),
@@ -18,6 +22,17 @@ pub fn by_meta(a: &Meta, b: &Meta, flags: Flags) -> Ordering {
     }
 }
 
+fn by_size(a: &Meta, b: &Meta, flags: Flags) -> Ordering {
+
+    if flags.sort_order == SortOrder::Default {
+        b.size.get_bytes().cmp(&a.size.get_bytes())
+    } else {
+        a.size.get_bytes().cmp(&b.size.get_bytes())
+    }
+}
+
+
+
 fn by_name(a: &Meta, b: &Meta, flags: Flags) -> Ordering {
     if flags.sort_order == SortOrder::Default {
         a.name.cmp(&b.name)