ls: silently ignore -T option (#3718)

* ls: silently ignore `-T` option

src/uu/ls/src/ls.rs

@@ -5,7 +5,7 @@
 // For the full copyright and license information, please view the LICENSE file
 // that was distributed with this source code.
 
-// spell-checker:ignore (ToDO) cpio svgz webm somegroup nlink rmvb xspf
+// spell-checker:ignore (ToDO) cpio svgz webm somegroup nlink rmvb xspf tabsize
 
 #[macro_use]
 extern crate uucore;
@@ -62,6 +62,7 @@ pub mod options {
         pub static LONG: &str = "long";
         pub static COLUMNS: &str = "C";
         pub static ACROSS: &str = "x";
+        pub static TAB_SIZE: &str = "tabsize"; // silently ignored (see #3624)
         pub static COMMAS: &str = "m";
         pub static LONG_NO_OWNER: &str = "g";
         pub static LONG_NO_GROUP: &str = "o";
@@ -891,6 +892,15 @@ pub fn uu_app<'a>() -> Command<'a> {
                         options::format::COLUMNS,
                     ]),
             )
+            .arg( // silently ignored (see #3624)
+                Arg::new(options::format::TAB_SIZE)
+                    .short('T')
+                    .long(options::format::TAB_SIZE)
+                    .env("TABSIZE")
+                    .takes_value(true)
+                    .value_name("COLS")
+                    .help("Assume tab stops at each COLS instead of 8 (unimplemented)")
+            )
             .arg(
                 Arg::new(options::format::COMMAS)
                     .short('m')

tests/by-util/test_ls.rs

@@ -1,4 +1,4 @@
-// spell-checker:ignore (words) READMECAREFULLY birthtime doesntexist oneline somebackup lrwx somefile somegroup somehiddenbackup somehiddenfile
+// spell-checker:ignore (words) READMECAREFULLY birthtime doesntexist oneline somebackup lrwx somefile somegroup somehiddenbackup somehiddenfile tabsize aaaaaaaa bbbb cccc dddddddd ncccc
 
 #[cfg(not(windows))]
 extern crate libc;
@@ -3117,3 +3117,36 @@ fn test_dereference_symlink_file_color() {
         .succeeds()
         .stdout_is(out_exp);
 }
+
+#[test]
+fn test_tabsize_option() {
+    let scene = TestScenario::new(util_name!());
+
+    scene.ucmd().args(&["-T", "3"]).succeeds();
+    scene.ucmd().args(&["--tabsize", "0"]).succeeds();
+    scene.ucmd().arg("-T").fails();
+}
+
+#[ignore = "issue #3624"]
+#[test]
+fn test_tabsize_formatting() {
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    at.touch("aaaaaaaa");
+    at.touch("bbbb");
+    at.touch("cccc");
+    at.touch("dddddddd");
+
+    ucmd.args(&["-T", "4"])
+        .succeeds()
+        .stdout_is("aaaaaaaa bbbb\ncccc\t dddddddd");
+
+    ucmd.args(&["-T", "2"])
+        .succeeds()
+        .stdout_is("aaaaaaaa bbbb\ncccc\t\t dddddddd");
+
+    // use spaces
+    ucmd.args(&["-T", "0"])
+        .succeeds()
+        .stdout_is("aaaaaaaa bbbb\ncccc     dddddddd");
+}