feat: add --sort=blocks

This features allow to sort by files' block size (the value printed by
the `-S` option).

README.md

@@ -165,7 +165,7 @@ These options are available when running with `--long` (`-l`):
 Some of the options accept parameters:
 
 - Valid **--colo\[u\]r** options are **always**, **automatic** (or **auto** for short), and **never**.
-- Valid sort fields are **accessed**, **changed**, **created**, **extension**, **Extension**, **inode**, **modified**, **name**, **Name**, **size**, **type**, and **none**. Fields starting with a capital letter sort uppercase before lowercase. The modified field has the aliases **date**, **time**, and **newest**, while its reverse has the aliases **age** and **oldest**.
+- Valid sort fields are **accessed**, **changed**, **created**, **extension**, **Extension**, **inode**, **modified**, **name**, **Name**, **size**, **block**, **type**, and **none**. Fields starting with a capital letter sort uppercase before lowercase. The modified field has the aliases **date**, **time**, and **newest**, while its reverse has the aliases **age** and **oldest**.
 - Valid time fields are **modified**, **changed**, **accessed**, and **created**.
 - Valid time styles are **default**, **iso**, **long-iso**, **full-iso**, and **relative**.
 

completions/bash/eza

@@ -24,7 +24,7 @@ _eza() {
             ;;
 
         -s|--sort)
-            mapfile -t COMPREPLY < <(compgen -W 'name filename Name Filename size filesize extension Extension date time modified changed accessed created type inode oldest newest age none --' -- "$cur")
+            mapfile -t COMPREPLY < <(compgen -W 'name filename Name Filename size filesize blocks extension Extension date time modified changed accessed created type inode oldest newest age none --' -- "$cur")
             return
             ;;
 

completions/fish/eza.fish

@@ -76,6 +76,7 @@ complete -c eza -s s -l sort -d "Which field to sort by" -x -a "
     none\t'Do not sort files at all'
     oldest\t'Sort by file modified time'
     size\t'Sort by file size'
+    blocks\t'Sort by blocks number'
     time\t'Sort by file modified time'
     type\t'Sort by file type'
 "

completions/zsh/_eza

@@ -41,7 +41,7 @@ __eza() {
         {-L,--level}"+[Limit the depth of recursion]" \
         {-w,--width}"+[Limits column output of grid, 0 implies auto-width]" \
         {-r,--reverse}"[Reverse the sort order]" \
-        {-s,--sort}="[Which field to sort by]:(sort field):(accessed age changed created date extension Extension filename Filename inode modified oldest name Name newest none size time type)" \
+        {-s,--sort}="[Which field to sort by]:(sort field):(accessed age changed created date extension Extension filename Filename inode modified oldest name Name newest none size blocks time type)" \
         {-I,--ignore-glob}"[Ignore files that match these glob patterns]" \
         {-b,--binary}"[List file sizes with binary prefixes]" \
         {-B,--bytes}"[List file sizes in bytes, without any prefixes]" \

src/fs/fields.rs

@@ -149,6 +149,16 @@ pub enum Blocksize {
     None,
 }
 
+#[cfg(unix)]
+impl Blocksize {
+    pub fn bytes(self) -> u64 {
+        match self {
+            Blocksize::Some(n) => n,
+            Blocksize::None => 0,
+        }
+    }
+}
+
 /// The ID of the user that owns a file. This will only ever be a number;
 /// looking up the username is done in the `display` module.
 #[derive(Copy, Clone)]

src/fs/filter.rs

@@ -177,6 +177,10 @@ pub enum SortField {
     /// The file’s size, in bytes.
     Size,
 
+    /// The file’s block size, in bytes.
+    #[cfg(unix)]
+    BlockSize,
+
     /// The file’s inode, which usually corresponds to the order in which
     /// files were created on the filesystem, more or less.
     #[cfg(unix)]
@@ -272,6 +276,8 @@ impl SortField {
             Self::Name(AaBbCc)  => natord::compare_ignore_case(&a.name, &b.name),
 
             Self::Size          => a.length().cmp(&b.length()),
+            #[cfg(unix)]
+            Self::BlockSize     => a.blocksize().bytes().cmp(&b.blocksize().bytes()),
 
             #[cfg(unix)]
             Self::FileInode     => {

src/options/filter.rs

@@ -68,6 +68,8 @@ impl SortField {
             ".name" | ".filename" => Self::NameMixHidden(SortCase::AaBbCc),
             ".Name" | ".Filename" => Self::NameMixHidden(SortCase::ABCabc),
             "size" | "filesize" => Self::Size,
+            #[cfg(unix)]
+            "block" | "blocks" | "blocksize" => Self::BlockSize,
             "ext" | "extension" => Self::Extension(SortCase::AaBbCc),
             "Ext" | "Extension" => Self::Extension(SortCase::ABCabc),