Use imported names in Command::run signatures (#7967)

# Description

_(Thank you for improving Nushell. Please, check our [contributing
guide](../CONTRIBUTING.md) and talk to the core team before making major
changes.)_

I opened this PR to unify the run command method. It's mainly to improve
consistency across the tree.

# User-Facing Changes

None.

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-command/src/bits/and.rs

@@ -39,7 +39,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let target: i64 = call.req(engine_state, stack, 0)?;
 

crates/nu-command/src/bits/bits_.rs

@@ -2,7 +2,7 @@ use nu_engine::get_full_help;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, IntoPipelineData, PipelineData, Signature, Type, Value,
+    Category, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
 };
 
 #[derive(Clone)]
@@ -33,7 +33,7 @@ impl Command for Bits {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::String {
             val: get_full_help(
                 &Bits.signature(),

crates/nu-command/src/bits/not.rs

@@ -46,7 +46,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let signed = call.has_flag("signed");
         let number_bytes: Option<Spanned<String>> =

crates/nu-command/src/bits/or.rs

@@ -39,7 +39,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let target: i64 = call.req(engine_state, stack, 0)?;
 

crates/nu-command/src/bits/rotate_left.rs

@@ -49,7 +49,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let bits: usize = call.req(engine_state, stack, 0)?;
         let signed = call.has_flag("signed");

crates/nu-command/src/bits/rotate_right.rs

@@ -49,7 +49,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let bits: usize = call.req(engine_state, stack, 0)?;
         let signed = call.has_flag("signed");

crates/nu-command/src/bits/shift_left.rs

@@ -49,7 +49,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let bits: usize = call.req(engine_state, stack, 0)?;
         let signed = call.has_flag("signed");

crates/nu-command/src/bits/shift_right.rs

@@ -49,7 +49,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let bits: usize = call.req(engine_state, stack, 0)?;
         let signed = call.has_flag("signed");

crates/nu-command/src/bits/xor.rs

@@ -39,7 +39,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let target: i64 = call.req(engine_state, stack, 0)?;
         // This doesn't match explicit nulls

crates/nu-command/src/bytes/build_.rs

@@ -46,7 +46,7 @@ impl Command for BytesBuild {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let mut output = vec![];
         for expr in call.positional_iter() {
             let val = eval_expression(engine_state, stack, expr)?;

crates/nu-command/src/bytes/bytes_.rs

@@ -2,7 +2,7 @@ use nu_engine::get_full_help;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, IntoPipelineData, PipelineData, Signature, Type, Value,
+    Category, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
 };
 
 #[derive(Clone)]
@@ -33,7 +33,7 @@ impl Command for Bytes {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::String {
             val: get_full_help(
                 &Bytes.signature(),

crates/nu-command/src/conversions/fmt.rs

@@ -64,7 +64,7 @@ impl Command for Fmt {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         fmt(engine_state, stack, call, input)
     }
 }
@@ -74,7 +74,7 @@ fn fmt(
     stack: &mut Stack,
     call: &Call,
     input: PipelineData,
-) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+) -> Result<PipelineData, ShellError> {
     let cell_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
     let args = CellPathOnlyArgs::from(cell_paths);
     operate(action, args, input, call.head, engine_state.ctrlc.clone())

crates/nu-command/src/conversions/into/binary.rs

@@ -49,7 +49,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         into_binary(engine_state, stack, call, input)
     }
 
@@ -109,7 +109,7 @@ fn into_binary(
     stack: &mut Stack,
     call: &Call,
     input: PipelineData,
-) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+) -> Result<PipelineData, ShellError> {
     let head = call.head;
     let cell_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
 

crates/nu-command/src/conversions/into/bool.rs

@@ -45,7 +45,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         into_bool(engine_state, stack, call, input)
     }
 

crates/nu-command/src/conversions/into/command.rs

@@ -2,7 +2,7 @@ use nu_engine::get_full_help;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, IntoPipelineData, PipelineData, Signature, Type, Value,
+    Category, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
 };
 
 #[derive(Clone)]
@@ -33,7 +33,7 @@ impl Command for Into {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::String {
             val: get_full_help(
                 &Into.signature(),

crates/nu-command/src/conversions/into/decimal.rs

@@ -41,7 +41,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let cell_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
         let args = CellPathOnlyArgs::from(cell_paths);
         operate(action, args, input, call.head, engine_state.ctrlc.clone())

crates/nu-command/src/conversions/into/duration.rs

@@ -56,7 +56,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         into_duration(engine_state, stack, call, input)
     }
 

crates/nu-command/src/conversions/into/filesize.rs

@@ -44,7 +44,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let cell_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
         let args = CellPathOnlyArgs::from(cell_paths);
         operate(action, args, input, call.head, engine_state.ctrlc.clone())

crates/nu-command/src/conversions/into/int.rs

@@ -62,7 +62,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let cell_paths = call.rest(engine_state, stack, 0)?;
         let cell_paths = (!cell_paths.is_empty()).then_some(cell_paths);
 

crates/nu-command/src/conversions/into/record.rs

@@ -40,7 +40,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         into_record(engine_state, call, input)
     }
 

crates/nu-command/src/conversions/into/string.rs

@@ -70,7 +70,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         string_helper(engine_state, stack, call, input)
     }
 
@@ -148,7 +148,7 @@ fn string_helper(
     stack: &mut Stack,
     call: &Call,
     input: PipelineData,
-) -> Result<nu_protocol::PipelineData, ShellError> {
+) -> Result<PipelineData, ShellError> {
     let decimals = call.has_flag("decimals");
     let head = call.head;
     let decimals_value: Option<i64> = call.get_flag(engine_state, stack, "decimals")?;

crates/nu-command/src/core_commands/alias.rs

@@ -1,6 +1,8 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, Span, SyntaxShape, Type, Value};
+use nu_protocol::{
+    Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
+};
 
 #[derive(Clone)]
 pub struct Alias;
@@ -45,7 +47,7 @@ impl Command for Alias {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/break_.rs

@@ -35,7 +35,7 @@ impl Command for Break {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Err(ShellError::Break(call.head))
     }
 

crates/nu-command/src/core_commands/const_.rs

@@ -46,7 +46,7 @@ impl Command for Const {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let var_id = call
             .positional_nth(0)
             .expect("checked through parser")

crates/nu-command/src/core_commands/continue_.rs

@@ -35,7 +35,7 @@ impl Command for Continue {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Err(ShellError::Continue(call.head))
     }
 

crates/nu-command/src/core_commands/def.rs

@@ -1,6 +1,8 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type, Value};
+use nu_protocol::{
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
+};
 
 #[derive(Clone)]
 pub struct Def;
@@ -38,7 +40,7 @@ impl Command for Def {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/def_env.rs

@@ -1,6 +1,8 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type, Value};
+use nu_protocol::{
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
+};
 
 #[derive(Clone)]
 pub struct DefEnv;
@@ -64,7 +66,7 @@ def-env cd_with_fallback [arg = ""] {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/error_make.rs

@@ -39,7 +39,7 @@ impl Command for ErrorMake {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let span = call.head;
         let arg: Value = call.req(engine_state, stack, 0)?;
         let unspanned = call.has_flag("unspanned");

crates/nu-command/src/core_commands/export.rs

@@ -2,7 +2,7 @@ use nu_engine::get_full_help;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, Example, IntoPipelineData, PipelineData, Signature, Type, Value,
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
 };
 
 #[derive(Clone)]
@@ -38,7 +38,7 @@ impl Command for ExportCommand {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::String {
             val: get_full_help(
                 &ExportCommand.signature(),

crates/nu-command/src/core_commands/export_alias.rs

@@ -1,6 +1,6 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type};
+use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type};
 
 #[derive(Clone)]
 pub struct ExportAlias;
@@ -41,7 +41,7 @@ impl Command for ExportAlias {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/export_def.rs

@@ -1,6 +1,8 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type, Value};
+use nu_protocol::{
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
+};
 
 #[derive(Clone)]
 pub struct ExportDef;
@@ -38,7 +40,7 @@ impl Command for ExportDef {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/export_def_env.rs

@@ -1,6 +1,8 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type, Value};
+use nu_protocol::{
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
+};
 
 #[derive(Clone)]
 pub struct ExportDefEnv;
@@ -64,7 +66,7 @@ export def-env cd_with_fallback [arg = ""] {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/export_extern.rs

@@ -1,6 +1,6 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type};
+use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type};
 
 #[derive(Clone)]
 pub struct ExportExtern;
@@ -37,7 +37,7 @@ impl Command for ExportExtern {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/export_use.rs

@@ -1,6 +1,8 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type, Value};
+use nu_protocol::{
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
+};
 
 #[derive(Clone)]
 pub struct ExportUse;
@@ -41,7 +43,7 @@ impl Command for ExportUse {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/extern_.rs

@@ -1,6 +1,6 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type};
+use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type};
 
 #[derive(Clone)]
 pub struct Extern;
@@ -37,7 +37,7 @@ impl Command for Extern {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/for_.rs

@@ -56,7 +56,7 @@ impl Command for For {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let var_id = call
             .positional_nth(0)

crates/nu-command/src/core_commands/hide.rs

@@ -1,6 +1,6 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type};
+use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type};
 
 #[derive(Clone)]
 pub struct Hide;
@@ -43,7 +43,7 @@ This command is a parser keyword. For details, check:
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/hide_env.rs

@@ -40,7 +40,7 @@ impl Command for HideEnv {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let env_var_names: Vec<Spanned<String>> = call.rest(engine_state, stack, 0)?;
         let ignore_errors = call.has_flag("ignore-errors");
 

crates/nu-command/src/core_commands/if_.rs

@@ -55,7 +55,7 @@ impl Command for If {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let cond = call.positional_nth(0).expect("checked through parser");
         let then_block: Block = call.req(engine_state, stack, 1)?;
         let else_case = call.positional_nth(2);

crates/nu-command/src/core_commands/ignore.rs

@@ -1,6 +1,6 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, Span, Type, Value};
+use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
 
 #[derive(Clone)]
 pub struct Ignore;
@@ -30,7 +30,7 @@ impl Command for Ignore {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         input.into_value(call.head);
         Ok(PipelineData::empty())
     }

crates/nu-command/src/core_commands/let_.rs

@@ -1,7 +1,7 @@
 use nu_engine::eval_expression_with_input;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type};
+use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type};
 
 #[derive(Clone)]
 pub struct Let;
@@ -47,7 +47,7 @@ impl Command for Let {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let var_id = call
             .positional_nth(0)
             .expect("checked through parser")

crates/nu-command/src/core_commands/loop_.rs

@@ -40,7 +40,7 @@ impl Command for Loop {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let block: Block = call.req(engine_state, stack, 0)?;
 
         loop {

crates/nu-command/src/core_commands/metadata.rs

@@ -2,8 +2,8 @@ use nu_engine::CallExt;
 use nu_protocol::ast::{Call, Expr, Expression};
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, DataSource, Example, IntoPipelineData, PipelineData, PipelineMetadata, Signature,
+    Category, DataSource, Example, IntoPipelineData, PipelineData, PipelineMetadata, ShellError,
-    Span, SyntaxShape, Type, Value,
+    Signature, Span, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -36,7 +36,7 @@ impl Command for Metadata {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let arg = call.positional_nth(0);
         let head = call.head;
 

crates/nu-command/src/core_commands/module.rs

@@ -1,6 +1,8 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type, Value};
+use nu_protocol::{
+    Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
+};
 
 #[derive(Clone)]
 pub struct Module;
@@ -37,7 +39,7 @@ impl Command for Module {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/mut_.rs

@@ -1,7 +1,7 @@
 use nu_engine::eval_expression_with_input;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type};
+use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type};
 
 #[derive(Clone)]
 pub struct Mut;
@@ -47,7 +47,7 @@ impl Command for Mut {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let var_id = call
             .positional_nth(0)
             .expect("checked through parser")

crates/nu-command/src/core_commands/overlay/command.rs

@@ -2,7 +2,7 @@ use nu_engine::get_full_help;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, IntoPipelineData, PipelineData, Signature, Type, Value,
+    Category, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
 };
 
 #[derive(Clone)]
@@ -26,7 +26,7 @@ impl Command for Overlay {
     fn extra_usage(&self) -> &str {
         r#"This command is a parser keyword. For details, check:
   https://www.nushell.sh/book/thinking_in_nu.html
-  
+
   You must use one of the following subcommands. Using this command as-is will only produce this help message."#
     }
 
@@ -40,7 +40,7 @@ impl Command for Overlay {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::String {
             val: get_full_help(
                 &Overlay.signature(),

crates/nu-command/src/core_commands/overlay/hide.rs

@@ -50,7 +50,7 @@ impl Command for OverlayHide {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let overlay_name: Spanned<String> = if let Some(name) = call.opt(engine_state, stack, 0)? {
             name
         } else {

crates/nu-command/src/core_commands/register.rs

@@ -1,6 +1,6 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape, Type};
+use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type};
 
 #[derive(Clone)]
 pub struct Register;
@@ -51,7 +51,7 @@ impl Command for Register {
         _stack: &mut Stack,
         _call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(PipelineData::empty())
     }
 

crates/nu-command/src/core_commands/return_.rs

@@ -39,7 +39,7 @@ impl Command for Return {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let return_value: Option<Value> = call.opt(engine_state, stack, 0)?;
         if let Some(value) = return_value {
             Err(ShellError::Return(call.head, Box::new(value)))

crates/nu-command/src/core_commands/try_.rs

@@ -2,7 +2,8 @@ use nu_engine::{eval_block, CallExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Block, Closure, Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, Signature, SyntaxShape, Type, Value,
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Type,
+    Value,
 };
 
 #[derive(Clone)]
@@ -47,7 +48,7 @@ impl Command for Try {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let try_block: Block = call.req(engine_state, stack, 0)?;
         let catch_block: Option<Closure> = call.opt(engine_state, stack, 1)?;
 

crates/nu-command/src/core_commands/while_.rs

@@ -45,7 +45,7 @@ impl Command for While {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let cond = call.positional_nth(0).expect("checked through parser");
         let block: Block = call.req(engine_state, stack, 1)?;
 

crates/nu-command/src/date/format.rs

@@ -50,7 +50,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         if call.has_flag("list") {
             return Ok(PipelineData::Value(

crates/nu-command/src/date/humanize.rs

@@ -45,7 +45,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {

crates/nu-command/src/date/list_timezone.rs

@@ -2,7 +2,8 @@ use chrono_tz::TZ_VARIANTS;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, PipelineData, Signature, Span, Type, Value,
+    Category, Example, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, Span,
+    Type, Value,
 };
 
 #[derive(Clone)]
@@ -33,7 +34,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let span = call.head;
 
         Ok(TZ_VARIANTS

crates/nu-command/src/date/now.rs

@@ -1,7 +1,9 @@
 use chrono::Local;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, IntoPipelineData, PipelineData, Signature, Type, Value};
+use nu_protocol::{
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
+};
 #[derive(Clone)]
 pub struct SubCommand;
 
@@ -30,7 +32,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let dt = Local::now();
         Ok(Value::Date {

crates/nu-command/src/date/to_record.rs

@@ -2,11 +2,11 @@ use crate::date::utils::parse_date_from_string;
 use chrono::{DateTime, Datelike, FixedOffset, Local, Timelike};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::Type;
 use nu_protocol::{
     Category, Example, PipelineData, ShellError::DatetimeParseError, ShellError::PipelineEmpty,
     Signature, Span, Value,
 };
+use nu_protocol::{ShellError, Type};
 
 #[derive(Clone)]
 pub struct SubCommand;
@@ -40,7 +40,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {

crates/nu-command/src/date/to_table.rs

@@ -2,11 +2,11 @@ use crate::date::utils::parse_date_from_string;
 use chrono::{DateTime, Datelike, FixedOffset, Local, Timelike};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::Type;
 use nu_protocol::{
     Category, Example, PipelineData, ShellError::DatetimeParseError, ShellError::PipelineEmpty,
     Signature, Span, Value,
 };
+use nu_protocol::{ShellError, Type};
 
 #[derive(Clone)]
 pub struct SubCommand;
@@ -40,7 +40,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {

crates/nu-command/src/date/to_timezone.rs

@@ -52,7 +52,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let timezone: Spanned<String> = call.req(engine_state, stack, 0)?;
 

crates/nu-command/src/deprecated/str_datetime.rs

@@ -1,7 +1,7 @@
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, PipelineData, Signature,
+    Category, PipelineData, ShellError, Signature,
 };
 
 #[derive(Clone)]
@@ -26,7 +26,7 @@ impl Command for StrDatetimeDeprecated {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Err(nu_protocol::ShellError::DeprecatedCommand(
             self.name().to_string(),
             "into datetime".to_string(),

crates/nu-command/src/deprecated/str_decimal.rs

@@ -1,7 +1,7 @@
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, PipelineData, Signature,
+    Category, PipelineData, ShellError, Signature,
 };
 
 #[derive(Clone)]
@@ -26,7 +26,7 @@ impl Command for StrDecimalDeprecated {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Err(nu_protocol::ShellError::DeprecatedCommand(
             self.name().to_string(),
             "into decimal".to_string(),

crates/nu-command/src/deprecated/str_find_replace.rs

@@ -1,7 +1,7 @@
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, PipelineData, Signature,
+    Category, PipelineData, ShellError, Signature,
 };
 
 #[derive(Clone)]
@@ -26,7 +26,7 @@ impl Command for StrFindReplaceDeprecated {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Err(nu_protocol::ShellError::DeprecatedCommand(
             self.name().to_string(),
             "str replace".to_string(),

crates/nu-command/src/deprecated/str_int.rs

@@ -1,7 +1,7 @@
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, PipelineData, Signature,
+    Category, PipelineData, ShellError, Signature,
 };
 
 #[derive(Clone)]
@@ -26,7 +26,7 @@ impl Command for StrIntDeprecated {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Err(nu_protocol::ShellError::DeprecatedCommand(
             self.name().to_string(),
             "into int".to_string(),

crates/nu-command/src/env/config/config_.rs

@@ -2,7 +2,7 @@ use nu_engine::get_full_help;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, IntoPipelineData, PipelineData, Signature, Type, Value,
+    Category, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
 };
 
 #[derive(Clone)]
@@ -33,7 +33,7 @@ impl Command for ConfigMeta {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::String {
             val: get_full_help(
                 &ConfigMeta.signature(),

crates/nu-command/src/env/config/config_env.rs

@@ -42,7 +42,7 @@ impl Command for ConfigEnv {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let env_vars_str = env_to_strings(engine_state, stack)?;
         let mut config_path = match nu_path::config_dir() {
             Some(path) => path,

crates/nu-command/src/env/config/config_nu.rs

@@ -42,7 +42,7 @@ impl Command for ConfigNu {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let env_vars_str = env_to_strings(engine_state, stack)?;
         let mut config_path = match nu_path::config_dir() {
             Some(path) => path,

crates/nu-command/src/env/config/config_reset.rs

@@ -43,7 +43,7 @@ impl Command for ConfigReset {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let only_nu = call.has_flag("nu");
         let only_env = call.has_flag("env");
         let no_backup = call.has_flag("without-backup");

crates/nu-command/src/env/env_command.rs

@@ -29,7 +29,7 @@ impl Command for Env {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let span = call.head;
 
         let mut env_vars: Vec<(String, Value)> =

crates/nu-command/src/env/export_env.rs

@@ -2,7 +2,7 @@ use nu_engine::{eval_block, redirect_env, CallExt};
 use nu_protocol::{
     ast::Call,
     engine::{Closure, Command, EngineState, Stack},
-    Category, Example, PipelineData, Signature, Span, SyntaxShape, Type, Value,
+    Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -34,7 +34,7 @@ impl Command for ExportEnv {
         caller_stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let capture_block: Closure = call.req(engine_state, caller_stack, 0)?;
         let block = engine_state.get_block(capture_block.block_id);
         let mut callee_stack = caller_stack.captures_to_stack(&capture_block.captures);

crates/nu-command/src/env/let_env.rs

@@ -36,7 +36,7 @@ impl Command for LetEnv {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         // TODO: find and require the crossplatform restrictions on environment names
         let env_var: Spanned<String> = call.req(engine_state, stack, 0)?;
 

crates/nu-command/src/env/load_env.rs

@@ -35,7 +35,7 @@ impl Command for LoadEnv {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let arg: Option<(Vec<String>, Vec<Value>)> = call.opt(engine_state, stack, 0)?;
         let span = call.head;
 

crates/nu-command/src/env/with_env.rs

@@ -41,7 +41,7 @@ impl Command for WithEnv {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         with_env(engine_state, stack, call, input)
     }
 

crates/nu-command/src/experimental/is_admin.rs

@@ -1,7 +1,9 @@
 use is_root::is_root;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, IntoPipelineData, PipelineData, Signature, Type, Value};
+use nu_protocol::{
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
+};
 
 #[derive(Clone)]
 pub struct IsAdmin;
@@ -32,7 +34,7 @@ impl Command for IsAdmin {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::boolean(is_root(), call.head).into_pipeline_data())
     }
 

crates/nu-command/src/experimental/view_source.rs

@@ -32,7 +32,7 @@ impl Command for ViewSource {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let arg: Value = call.req(engine_state, stack, 0)?;
         let arg_span = arg.span()?;
 

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

@@ -60,7 +60,7 @@ impl Command for Cd {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let path_val: Option<Spanned<String>> = call.opt(engine_state, stack, 0)?;
         let cwd = current_dir(engine_state, stack)?;
         let config = engine_state.get_config();

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

@@ -72,7 +72,7 @@ impl Command for Ls {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let all = call.has_flag("all");
         let long = call.has_flag("long");
         let short_names = call.has_flag("short-names");

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

@@ -62,7 +62,7 @@ impl Command for Mv {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         // TODO: handle invalid directory or insufficient permissions when moving
         let spanned_source: Spanned<String> = call.req(engine_state, stack, 0)?;
         let spanned_source = {

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

@@ -48,7 +48,7 @@ impl Command for Open {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let raw = call.has_flag("raw");
         let call_span = call.head;
         let ctrlc = engine_state.ctrlc.clone();

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

@@ -60,7 +60,7 @@ impl Command for Save {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let raw = call.has_flag("raw");
         let append = call.has_flag("append");
         let force = call.has_flag("force");

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

@@ -35,7 +35,7 @@ impl Command for Start {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let path = call.opt::<Spanned<String>>(engine_state, stack, 0)?;
 
         let path = {

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

@@ -66,7 +66,7 @@ impl Command for Watch {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let cwd = current_dir(engine_state, stack)?;
         let path_arg: Spanned<String> = call.req(engine_state, stack, 0)?;
 

crates/nu-command/src/filters/collect.rs

@@ -2,7 +2,8 @@ use nu_engine::{eval_block, redirect_env, CallExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Closure, Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, Signature, SyntaxShape, Type, Value,
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Type,
+    Value,
 };
 
 #[derive(Clone)]
@@ -39,7 +40,7 @@ impl Command for Collect {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let capture_block: Closure = call.req(engine_state, stack, 0)?;
 
         let block = engine_state.get_block(capture_block.block_id).clone();

crates/nu-command/src/filters/compact.rs

@@ -45,7 +45,7 @@ impl Command for Compact {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         compact(engine_state, stack, call, input)
     }
 
@@ -88,7 +88,7 @@ pub fn compact(
     stack: &mut Stack,
     call: &Call,
     input: PipelineData,
-) -> Result<nu_protocol::PipelineData, ShellError> {
+) -> Result<PipelineData, ShellError> {
     let columns: Vec<String> = call.rest(engine_state, stack, 0)?;
     let metadata = input.metadata();
     input

crates/nu-command/src/filters/default.rs

@@ -2,7 +2,7 @@ use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, PipelineData, Signature, Span, Spanned, SyntaxShape, Type, Value,
+    Category, Example, PipelineData, ShellError, Signature, Span, Spanned, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -37,7 +37,7 @@ impl Command for Default {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         default(engine_state, stack, call, input)
     }
 
@@ -76,7 +76,7 @@ fn default(
     stack: &mut Stack,
     call: &Call,
     input: PipelineData,
-) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+) -> Result<PipelineData, ShellError> {
     let value: Value = call.req(engine_state, stack, 0)?;
     let column: Option<Spanned<String>> = call.opt(engine_state, stack, 1)?;
 

crates/nu-command/src/filters/each.rs

@@ -119,7 +119,7 @@ with 'transpose' first."#
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let capture_block: Closure = call.req(engine_state, stack, 0)?;
 
         let keep_empty = call.has_flag("keep-empty");

crates/nu-command/src/filters/each_while.rs

@@ -2,8 +2,8 @@ use nu_engine::{eval_block_with_early_return, CallExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Closure, Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, Signature,
+    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, ShellError,
-    Span, SyntaxShape, Type, Value,
+    Signature, Span, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -80,7 +80,7 @@ impl Command for EachWhile {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let capture_block: Closure = call.req(engine_state, stack, 0)?;
 
         let metadata = input.metadata();

crates/nu-command/src/filters/empty.rs

@@ -2,7 +2,8 @@ use nu_engine::CallExt;
 use nu_protocol::ast::{Call, CellPath};
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, Signature, SyntaxShape, Type, Value,
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Type,
+    Value,
 };
 
 #[derive(Clone)]
@@ -34,7 +35,7 @@ impl Command for Empty {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         empty(engine_state, stack, call, input)
     }
 
@@ -65,7 +66,7 @@ fn empty(
     stack: &mut Stack,
     call: &Call,
     input: PipelineData,
-) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+) -> Result<PipelineData, ShellError> {
     let head = call.head;
     let columns: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
 

crates/nu-command/src/filters/enumerate.rs

@@ -1,7 +1,8 @@
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, PipelineData, Signature, Span, Type, Value,
+    Category, Example, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, Span,
+    Type, Value,
 };
 
 #[derive(Clone)]
@@ -59,7 +60,7 @@ impl Command for Enumerate {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let metadata = input.metadata();
         let ctrlc = engine_state.ctrlc.clone();
         let span = call.head;

crates/nu-command/src/filters/filter.rs

@@ -3,8 +3,8 @@ use nu_engine::{eval_block, CallExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Closure, Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, Signature,
+    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, ShellError,
-    Span, SyntaxShape, Type, Value,
+    Signature, Span, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -51,7 +51,7 @@ a variable. On the other hand, the "row condition" syntax is not supported."#
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let capture_block: Closure = call.req(engine_state, stack, 0)?;
         let metadata = input.metadata();
         let ctrlc = engine_state.ctrlc.clone();

crates/nu-command/src/filters/first.rs

@@ -52,7 +52,7 @@ impl Command for First {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         first_helper(engine_state, stack, call, input)
     }
 
@@ -88,7 +88,7 @@ fn first_helper(
     stack: &mut Stack,
     call: &Call,
     input: PipelineData,
-) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+) -> Result<PipelineData, ShellError> {
     let head = call.head;
     let rows: Option<i64> = call.opt(engine_state, stack, 0)?;
     // FIXME: for backwards compatibility reasons, if `rows` is not specified we

crates/nu-command/src/filters/flatten.rs

@@ -43,7 +43,7 @@ impl Command for Flatten {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         flatten(engine_state, stack, call, input)
     }
 
@@ -117,7 +117,7 @@ fn flatten(
     stack: &mut Stack,
     call: &Call,
     input: PipelineData,
-) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+) -> Result<PipelineData, ShellError> {
     let tag = call.head;
     let columns: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
     let metadata = input.metadata();

crates/nu-command/src/filters/get.rs

@@ -2,8 +2,8 @@ use nu_engine::CallExt;
 use nu_protocol::ast::{Call, CellPath};
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, Signature,
+    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, ShellError,
-    Span, SyntaxShape, Type, Value,
+    Signature, Span, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -54,7 +54,7 @@ impl Command for Get {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let span = call.head;
         let cell_path: CellPath = call.req(engine_state, stack, 0)?;
         let rest: Vec<CellPath> = call.rest(engine_state, stack, 1)?;

crates/nu-command/src/filters/group.rs

@@ -2,8 +2,8 @@ use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, PipelineData, Signature, Span, Spanned,
+    Category, Example, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, Span,
-    SyntaxShape, Type, Value,
+    Spanned, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -60,7 +60,7 @@ impl Command for Group {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let group_size: Spanned<usize> = call.req(engine_state, stack, 0)?;
         let ctrlc = engine_state.ctrlc.clone();
         let metadata = input.metadata();

crates/nu-command/src/filters/group_by.rs

@@ -39,7 +39,7 @@ impl Command for GroupBy {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         group_by(engine_state, stack, call, input)
     }
 

crates/nu-command/src/filters/headers.rs

@@ -85,7 +85,7 @@ impl Command for Headers {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let config = engine_state.get_config();
         let metadata = input.metadata();
         let value = input.into_value(call.head);

crates/nu-command/src/filters/insert.rs

@@ -47,7 +47,7 @@ impl Command for Insert {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         insert(engine_state, stack, call, input)
     }
 

crates/nu-command/src/filters/length.rs

@@ -38,7 +38,7 @@ impl Command for Length {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let col = call.has_flag("column");
         if col {
             length_col(engine_state, call, input)

crates/nu-command/src/filters/lines.rs

@@ -34,7 +34,7 @@ impl Command for Lines {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let ctrlc = engine_state.ctrlc.clone();
         let skip_empty = call.has_flag("skip-empty");

crates/nu-command/src/filters/merge.rs

@@ -93,7 +93,7 @@ repeating this process with row 1, and so on."#
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let merge_value: Value = call.req(engine_state, stack, 0)?;
 
         let metadata = input.metadata();

crates/nu-command/src/filters/move_.rs

@@ -109,7 +109,7 @@ impl Command for Move {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let columns: Vec<Value> = call.rest(engine_state, stack, 0)?;
         let after: Option<Value> = call.get_flag(engine_state, stack, "after")?;
         let before: Option<Value> = call.get_flag(engine_state, stack, "before")?;

crates/nu-command/src/filters/par_each.rs

@@ -2,8 +2,8 @@ use nu_engine::{eval_block_with_early_return, CallExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Closure, Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, Signature,
+    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, ShellError,
-    Span, SyntaxShape, Type, Value,
+    Signature, Span, SyntaxShape, Type, Value,
 };
 use rayon::prelude::*;
 
@@ -84,7 +84,7 @@ impl Command for ParEach {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let capture_block: Closure = call.req(engine_state, stack, 0)?;
 
         let metadata = input.metadata();