Fix reading of LS_COLORS; ls display symlink (#357)

Also a swing-by fix removing a redundant call to 
std::fs::symlink_metadata().

crates/nu-command/src/filesystem/ls.rs

@@ -57,18 +57,23 @@ impl Command for Ls {
 
         let call_span = call.head;
         let glob = glob::glob(&pattern).unwrap();
-        let ls_colors = LsColors::from_env().unwrap_or_default();
+        let ls_colors = match stack.get_env_var("LS_COLORS") {
+            Some(s) => LsColors::from_string(&s),
+            None => LsColors::default(),
+        };
 
         Ok(glob
             .into_iter()
             .map(move |x| match x {
                 Ok(path) => match std::fs::symlink_metadata(&path) {
                     Ok(metadata) => {
+                        let is_symlink = metadata.file_type().is_symlink();
                         let is_file = metadata.is_file();
                         let is_dir = metadata.is_dir();
                         let filesize = metadata.len();
                         let mut cols = vec!["name".into(), "type".into(), "size".into()];
-                        let style = ls_colors.style_for_path(path.clone());
+                        let style =
+                            ls_colors.style_for_path_with_metadata(path.clone(), Some(&metadata));
                         let ansi_style = style.map(Style::to_crossterm_style).unwrap_or_default();
                         let use_ls_colors = config.use_ls_colors;
 
@@ -84,7 +89,9 @@ impl Command for Ls {
                                     span: call_span,
                                 }
                             },
-                            if is_file {
+                            if is_symlink {
+                                Value::string("symlink", call_span)
+                            } else if is_file {
                                 Value::string("file", call_span)
                             } else if is_dir {
                                 Value::string("dir", call_span)

crates/nu-command/src/viewers/griddle.rs

@@ -60,6 +60,8 @@ prints out the list properly."#
 
         let config = stack.get_config()?;
 
+        let env_str = stack.get_env_var("LS_COLORS");
+
         match input {
             PipelineData::Value(Value::List { vals, .. }) => {
                 // dbg!("value::list");
@@ -71,6 +73,7 @@ prints out the list properly."#
                         width_param,
                         color_param,
                         separator_param,
+                        env_str,
                     ))
                 } else {
                     Ok(PipelineData::new(call.head))
@@ -86,6 +89,7 @@ prints out the list properly."#
                         width_param,
                         color_param,
                         separator_param,
+                        env_str,
                     ))
                 } else {
                     // dbg!(data);
@@ -106,6 +110,7 @@ prints out the list properly."#
                     width_param,
                     color_param,
                     separator_param,
+                    env_str,
                 ))
             }
             x => {
@@ -123,8 +128,13 @@ fn create_grid_output2(
     width_param: Option<String>,
     color_param: bool,
     separator_param: Option<String>,
+    env_str: Option<String>,
 ) -> PipelineData {
-    let ls_colors = LsColors::from_env().unwrap_or_default();
+    let ls_colors = match env_str {
+        Some(s) => LsColors::from_string(&s),
+        None => LsColors::default(),
+    };
+
     let cols = if let Some(col) = width_param {
         col.parse::<u16>().unwrap_or(80)
     } else if let Some((Width(w), Height(_h))) = terminal_size::terminal_size() {