ListStream touchup (#12524)

# Description

Does some misc changes to `ListStream`:
- Moves it into its own module/file separate from `RawStream`.
- `ListStream`s now have an associated `Span`.
- This required changes to `ListStreamInfo` in `nu-plugin`. Note sure if
this is a breaking change for the plugin protocol.
- Hides the internals of `ListStream` but also adds a few more methods.
- This includes two functions to more easily alter a stream (these take
a `ListStream` and return a `ListStream` instead of having to go through
the whole `into_pipeline_data(..)` route).
  -  `map`: takes a `FnMut(Value) -> Value`
  - `modify`: takes a function to modify the inner stream.

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

@@ -121,7 +121,7 @@ impl Command for Du {
                 };
                 Ok(
                     du_for_one_pattern(args, &current_dir, tag, engine_state.ctrlc.clone())?
-                        .into_pipeline_data(engine_state.ctrlc.clone()),
+                        .into_pipeline_data(tag, engine_state.ctrlc.clone()),
                 )
             }
             Some(paths) => {
@@ -147,7 +147,7 @@ impl Command for Du {
                 Ok(result_iters
                     .into_iter()
                     .flatten()
-                    .into_pipeline_data(engine_state.ctrlc.clone()))
+                    .into_pipeline_data(tag, engine_state.ctrlc.clone()))
             }
         }
     }

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

@@ -199,7 +199,7 @@ impl Command for Glob {
             }
         };
 
-        Ok(if !not_patterns.is_empty() {
+        let result = if !not_patterns.is_empty() {
             let np: Vec<&str> = not_patterns.iter().map(|s| s as &str).collect();
             let glob_results = glob
                 .walk_with_behavior(
@@ -218,10 +218,7 @@ impl Command for Glob {
                     inner: vec![],
                 })?
                 .flatten();
-            let result = glob_to_value(ctrlc, glob_results, no_dirs, no_files, no_symlinks, span)?;
-            result
-                .into_iter()
-                .into_pipeline_data(engine_state.ctrlc.clone())
+            glob_to_value(ctrlc, glob_results, no_dirs, no_files, no_symlinks, span)
         } else {
             let glob_results = glob
                 .walk_with_behavior(
@@ -232,11 +229,12 @@ impl Command for Glob {
                     },
                 )
                 .flatten();
-            let result = glob_to_value(ctrlc, glob_results, no_dirs, no_files, no_symlinks, span)?;
-            result
-                .into_iter()
-                .into_pipeline_data(engine_state.ctrlc.clone())
-        })
+            glob_to_value(ctrlc, glob_results, no_dirs, no_files, no_symlinks, span)
+        }?;
+
+        Ok(result
+            .into_iter()
+            .into_pipeline_data(span, engine_state.ctrlc.clone()))
     }
 }
 

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

@@ -115,10 +115,11 @@ impl Command for Ls {
         match input_pattern_arg {
             None => Ok(ls_for_one_pattern(None, args, ctrl_c.clone(), cwd)?
                 .into_pipeline_data_with_metadata(
+                    call_span,
+                    ctrl_c,
                     PipelineMetadata {
                         data_source: DataSource::Ls,
                     },
-                    ctrl_c,
                 )),
             Some(pattern) => {
                 let mut result_iters = vec![];
@@ -137,10 +138,11 @@ impl Command for Ls {
                     .into_iter()
                     .flatten()
                     .into_pipeline_data_with_metadata(
+                        call_span,
+                        ctrl_c,
                         PipelineMetadata {
                             data_source: DataSource::Ls,
                         },
-                        ctrl_c,
                     ))
             }
         }

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

@@ -209,7 +209,10 @@ impl Command for Open {
         } else if output.len() == 1 {
             Ok(output.remove(0))
         } else {
-            Ok(output.into_iter().flatten().into_pipeline_data(ctrlc))
+            Ok(output
+                .into_iter()
+                .flatten()
+                .into_pipeline_data(call_span, ctrlc))
         }
     }
 

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

@@ -465,7 +465,7 @@ fn rm(
             }
         })
         .filter(|x| !matches!(x.get_type(), Type::Nothing))
-        .into_pipeline_data(ctrlc)
+        .into_pipeline_data(span, ctrlc)
         .print_not_formatted(engine_state, false, true)?;
 
     Ok(PipelineData::empty())