Use CommandType in more places (#12832)

# Description
Kind of a vague title, but this PR does two main things:
1. Rather than overriding functions like `Command::is_parser_keyword`,
this PR instead changes commands to override `Command::command_type`.
The `CommandType` returned by `Command::command_type` is then used to
automatically determine whether `Command::is_parser_keyword` and the
other `is_{type}` functions should return true. These changes allow us
to remove the `CommandType::Other` case and should also guarantee than
only one of the `is_{type}` functions on `Command` will return true.
2. Uses the new, reworked `Command::command_type` function in the `scope
commands` and `which` commands.


# User-Facing Changes
- Breaking change for `scope commands`: multiple columns (`is_builtin`,
`is_keyword`, `is_plugin`, etc.) have been merged into the `type`
column.
- Breaking change: the `which` command can now report `plugin` or
`keyword` instead of `built-in` in the `type` column. It may also now
report `external` instead of `custom` in the `type` column for known
`extern`s.

crates/nu-cli/src/commands/keybindings.rs

@@ -42,7 +42,7 @@ For more information on input and keybindings, check:
                 &Keybindings.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cli/src/menus/help_completions.rs

@@ -18,7 +18,7 @@ impl NuHelpCompleter {
         //Vec<(Signature, Vec<Example>, bool, bool)> {
         let mut commands = full_commands
             .iter()
-            .filter(|(sig, _, _, _, _)| {
+            .filter(|(sig, _, _)| {
                 sig.name.to_folded_case().contains(&folded_line)
                     || sig.usage.to_folded_case().contains(&folded_line)
                     || sig
@@ -29,7 +29,7 @@ impl NuHelpCompleter {
             })
             .collect::<Vec<_>>();
 
-        commands.sort_by(|(a, _, _, _, _), (b, _, _, _, _)| {
+        commands.sort_by(|(a, _, _), (b, _, _)| {
             let a_distance = levenshtein_distance(line, &a.name);
             let b_distance = levenshtein_distance(line, &b.name);
             a_distance.cmp(&b_distance)
@@ -37,7 +37,7 @@ impl NuHelpCompleter {
 
         commands
             .into_iter()
-            .map(|(sig, examples, _, _, _)| {
+            .map(|(sig, examples, _)| {
                 let mut long_desc = String::new();
 
                 let usage = &sig.usage;

crates/nu-cmd-dataframe/src/dataframe/stub.rs

@@ -35,7 +35,7 @@ impl Command for Dfr {
                 &Dfr.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cmd-extra/src/extra/bits/bits_.rs

@@ -35,7 +35,7 @@ impl Command for Bits {
                 &Bits.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cmd-extra/src/extra/filters/roll/roll_.rs

@@ -39,7 +39,7 @@ impl Command for Roll {
                 &Roll.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cmd-extra/src/extra/strings/str_/case/str_.rs

@@ -35,7 +35,7 @@ impl Command for Str {
                 &Str.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cmd-lang/src/core_commands/alias.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Alias;
@@ -29,8 +30,8 @@ impl Command for Alias {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-cmd-lang/src/core_commands/const_.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Const;
@@ -30,8 +31,8 @@ impl Command for Const {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-cmd-lang/src/core_commands/def.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Def;
@@ -28,8 +29,8 @@ impl Command for Def {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/export.rs

@@ -1,4 +1,5 @@
 use nu_engine::{command_prelude::*, get_full_help};
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct ExportCommand;
@@ -23,8 +24,8 @@ impl Command for ExportCommand {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(
@@ -40,7 +41,7 @@ impl Command for ExportCommand {
                 &ExportCommand.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cmd-lang/src/core_commands/export_alias.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct ExportAlias;
@@ -29,8 +30,8 @@ impl Command for ExportAlias {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-cmd-lang/src/core_commands/export_const.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct ExportConst;
@@ -30,8 +31,8 @@ impl Command for ExportConst {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/export_def.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct ExportDef;
@@ -28,8 +29,8 @@ impl Command for ExportDef {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/export_extern.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct ExportExtern;
@@ -25,8 +26,8 @@ impl Command for ExportExtern {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/export_module.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct ExportModule;
@@ -30,8 +31,8 @@ impl Command for ExportModule {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/export_use.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct ExportUse;
@@ -29,8 +30,8 @@ impl Command for ExportUse {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/extern_.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Extern;
@@ -25,8 +26,8 @@ impl Command for Extern {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/for_.rs

@@ -1,4 +1,5 @@
 use nu_engine::{command_prelude::*, get_eval_block, get_eval_expression};
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct For;
@@ -41,8 +42,8 @@ impl Command for For {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/hide.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Hide;
@@ -31,8 +32,8 @@ This command is a parser keyword. For details, check:
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/let_.rs

@@ -1,4 +1,5 @@
 use nu_engine::{command_prelude::*, get_eval_block};
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Let;
@@ -30,8 +31,8 @@ impl Command for Let {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn search_terms(&self) -> Vec<&str> {

crates/nu-cmd-lang/src/core_commands/module.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Module;
@@ -30,8 +31,8 @@ impl Command for Module {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/mut_.rs

@@ -1,4 +1,5 @@
 use nu_engine::{command_prelude::*, get_eval_block};
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Mut;
@@ -30,8 +31,8 @@ impl Command for Mut {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn search_terms(&self) -> Vec<&str> {

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

@@ -1,4 +1,5 @@
 use nu_engine::{command_prelude::*, get_full_help};
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Overlay;
@@ -25,8 +26,8 @@ impl Command for Overlay {
   You must use one of the following subcommands. Using this command as-is will only produce this help message."#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(
@@ -42,7 +43,7 @@ impl Command for Overlay {
                 &[],
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cmd-lang/src/core_commands/overlay/hide.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct OverlayHide;
@@ -35,8 +36,8 @@ impl Command for OverlayHide {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/overlay/new.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct OverlayNew;
@@ -33,8 +34,8 @@ This command is a parser keyword. For details, check:
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/overlay/use_.rs

@@ -2,7 +2,7 @@ use nu_engine::{
     command_prelude::*, find_in_dirs_env, get_dirs_var_from_call, get_eval_block, redirect_env,
 };
 use nu_parser::trim_quotes_str;
-use nu_protocol::ast::Expr;
+use nu_protocol::{ast::Expr, engine::CommandType};
 
 use std::path::Path;
 
@@ -50,8 +50,8 @@ impl Command for OverlayUse {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/return_.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Return;
@@ -28,8 +29,8 @@ impl Command for Return {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-lang/src/core_commands/scope/command.rs

@@ -1,4 +1,5 @@
 use nu_engine::{command_prelude::*, get_full_help};
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Scope;
@@ -19,8 +20,8 @@ impl Command for Scope {
         "Commands for getting info about what is in scope."
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(
@@ -36,7 +37,7 @@ impl Command for Scope {
                 &[],
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cmd-lang/src/core_commands/use_.rs

@@ -1,7 +1,10 @@
 use nu_engine::{
     command_prelude::*, find_in_dirs_env, get_dirs_var_from_call, get_eval_block, redirect_env,
 };
-use nu_protocol::ast::{Expr, Expression};
+use nu_protocol::{
+    ast::{Expr, Expression},
+    engine::CommandType,
+};
 
 #[derive(Clone)]
 pub struct Use;
@@ -40,8 +43,8 @@ This command is a parser keyword. For details, check:
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-plugin/src/commands/plugin/mod.rs

@@ -43,7 +43,7 @@ impl Command for PluginCommand {
                 &PluginCommand.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-cmd-plugin/src/commands/plugin/use_.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct PluginUse;
@@ -52,8 +53,8 @@ it was already previously registered with `plugin add`.
         vec!["add", "register", "scope"]
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-cmd-plugin/src/commands/register.rs

@@ -1,4 +1,5 @@
 use nu_engine::command_prelude::*;
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct Register;
@@ -48,8 +49,8 @@ This command is a parser keyword. For details, check:
         vec!["add"]
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

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

@@ -35,7 +35,7 @@ impl Command for Bytes {
                 &Bytes.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

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

@@ -35,7 +35,7 @@ impl Command for Into {
                 &[],
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/debug/view.rs

@@ -35,7 +35,7 @@ impl Command for View {
                 &View.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

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

@@ -55,7 +55,7 @@ impl Command for ViewSource {
                         }
                     }
                     // gets vector of positionals.
-                    else if let Some(block_id) = decl.get_block_id() {
+                    else if let Some(block_id) = decl.block_id() {
                         let block = engine_state.get_block(block_id);
                         if let Some(block_span) = block.span {
                             let contents = engine_state.get_span_contents(block_span);

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

@@ -35,7 +35,7 @@ impl Command for ConfigMeta {
                 &ConfigMeta.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

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

@@ -172,7 +172,7 @@ impl Command for Open {
                     match converter {
                         Some((converter_id, ext)) => {
                             let decl = engine_state.get_decl(converter_id);
-                            let command_output = if let Some(block_id) = decl.get_block_id() {
+                            let command_output = if let Some(block_id) = decl.block_id() {
                                 let block = engine_state.get_block(block_id);
                                 eval_block(engine_state, stack, block, stream)
                             } else {

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

@@ -393,7 +393,7 @@ fn convert_to_extension(
 ) -> Result<PipelineData, ShellError> {
     if let Some(decl_id) = engine_state.find_decl(format!("to {extension}").as_bytes(), &[]) {
         let decl = engine_state.get_decl(decl_id);
-        if let Some(block_id) = decl.get_block_id() {
+        if let Some(block_id) = decl.block_id() {
             let block = engine_state.get_block(block_id);
             let eval_block = get_eval_block(engine_state);
             eval_block(engine_state, stack, block, input)

crates/nu-command/src/formats/from/command.rs

@@ -35,7 +35,7 @@ impl Command for From {
                 &From.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/formats/to/command.rs

@@ -35,7 +35,7 @@ impl Command for To {
                 &To.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/hash/hash_.rs

@@ -35,7 +35,7 @@ impl Command for Hash {
                 &Self.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/help/help_commands.rs

@@ -1,6 +1,7 @@
 use crate::help::highlight_search_in_table;
 use nu_color_config::StyleComputer;
 use nu_engine::{command_prelude::*, get_full_help};
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct HelpCommands;
@@ -90,9 +91,15 @@ pub fn help_commands(
         let output = engine_state
             .get_signatures_with_examples(false)
             .iter()
-            .filter(|(signature, _, _, _, _)| signature.name == name)
-            .map(|(signature, examples, _, _, is_parser_keyword)| {
-                get_full_help(signature, examples, engine_state, stack, *is_parser_keyword)
+            .filter(|(signature, _, _)| signature.name == name)
+            .map(|(signature, examples, cmd_type)| {
+                get_full_help(
+                    signature,
+                    examples,
+                    engine_state,
+                    stack,
+                    cmd_type == &CommandType::Keyword,
+                )
             })
             .collect::<Vec<String>>();
 

crates/nu-command/src/help/help_externs.rs

@@ -1,6 +1,7 @@
 use crate::help::highlight_search_in_table;
 use nu_color_config::StyleComputer;
 use nu_engine::{command_prelude::*, get_full_help, scope::ScopeData};
+use nu_protocol::engine::CommandType;
 
 #[derive(Clone)]
 pub struct HelpExterns;
@@ -110,9 +111,15 @@ pub fn help_externs(
         let output = engine_state
             .get_signatures_with_examples(false)
             .iter()
-            .filter(|(signature, _, _, _, _)| signature.name == name)
-            .map(|(signature, examples, _, _, is_parser_keyword)| {
-                get_full_help(signature, examples, engine_state, stack, *is_parser_keyword)
+            .filter(|(signature, _, _)| signature.name == name)
+            .map(|(signature, examples, cmd_type)| {
+                get_full_help(
+                    signature,
+                    examples,
+                    engine_state,
+                    stack,
+                    cmd_type == &CommandType::Keyword,
+                )
             })
             .collect::<Vec<String>>();
 

crates/nu-command/src/math/math_.rs

@@ -35,7 +35,7 @@ impl Command for MathCommand {
                 &MathCommand.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/misc/source.rs

@@ -1,4 +1,5 @@
 use nu_engine::{command_prelude::*, get_eval_block_with_early_return};
+use nu_protocol::engine::CommandType;
 
 /// Source a file for environment variables.
 #[derive(Clone)]
@@ -29,8 +30,8 @@ impl Command for Source {
   https://www.nushell.sh/book/thinking_in_nu.html"#
     }
 
-    fn is_parser_keyword(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Keyword
     }
 
     fn run(

crates/nu-command/src/network/http/http_.rs

@@ -41,7 +41,7 @@ impl Command for Http {
                 &Http.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/network/url/url_.rs

@@ -39,7 +39,7 @@ impl Command for Url {
                 &Url.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/path/path_.rs

@@ -48,7 +48,7 @@ the path literal."#
                 &PathCommand.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/random/random_.rs

@@ -39,7 +39,7 @@ impl Command for RandomCommand {
                 &RandomCommand.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/stor/stor_.rs

@@ -35,7 +35,7 @@ impl Command for Stor {
                 &Stor.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/strings/format/format_.rs

@@ -35,7 +35,7 @@ impl Command for Format {
                 &Format.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/strings/split/command.rs

@@ -35,7 +35,7 @@ impl Command for SplitCommand {
                 &SplitCommand.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/strings/str_/case/str_.rs

@@ -35,7 +35,7 @@ impl Command for Str {
                 &Str.examples(),
                 engine_state,
                 stack,
-                self.is_parser_keyword(),
+                self.is_keyword(),
             ),
             call.head,
         )

crates/nu-command/src/system/which_.rs

@@ -1,5 +1,5 @@
-use log::trace;
 use nu_engine::{command_prelude::*, env};
+use nu_protocol::engine::CommandType;
 use std::{ffi::OsStr, path::Path};
 
 #[derive(Clone)]
@@ -51,14 +51,14 @@ impl Command for Which {
 fn entry(
     arg: impl Into<String>,
     path: impl Into<String>,
-    cmd_type: impl Into<String>,
+    cmd_type: CommandType,
     span: Span,
 ) -> Value {
     Value::record(
         record! {
-            "command" => Value::string(arg.into(), span),
-            "path" => Value::string(path.into(), span),
-            "type" => Value::string(cmd_type.into(), span),
+            "command" => Value::string(arg, span),
+            "path" => Value::string(path, span),
+            "type" => Value::string(cmd_type.to_string(), span),
         },
         span,
     )
@@ -66,17 +66,8 @@ fn entry(
 
 fn get_entry_in_commands(engine_state: &EngineState, name: &str, span: Span) -> Option<Value> {
     if let Some(decl_id) = engine_state.find_decl(name.as_bytes(), &[]) {
-        let cmd_type = if engine_state.get_decl(decl_id).is_custom_command() {
-            "custom"
-        } else if engine_state.get_decl(decl_id).is_alias() {
-            "alias"
-        } else {
-            "built-in"
-        };
-
-        trace!("Found command: {}", name);
-
-        Some(entry(name, "", cmd_type, span))
+        let decl = engine_state.get_decl(decl_id);
+        Some(entry(name, "", decl.command_type(), span))
     } else {
         None
     }
@@ -109,7 +100,7 @@ fn get_first_entry_in_path(
     paths: impl AsRef<OsStr>,
 ) -> Option<Value> {
     which::which_in(item, Some(paths), cwd)
-        .map(|path| entry(item, path.to_string_lossy().to_string(), "external", span))
+        .map(|path| entry(item, path.to_string_lossy(), CommandType::External, span))
         .ok()
 }
 
@@ -132,7 +123,7 @@ fn get_all_entries_in_path(
 ) -> Vec<Value> {
     which::which_in_all(&item, Some(paths), cwd)
         .map(|iter| {
-            iter.map(|path| entry(item, path.to_string_lossy().to_string(), "external", span))
+            iter.map(|path| entry(item, path.to_string_lossy(), CommandType::External, span))
                 .collect()
         })
         .unwrap_or_default()

crates/nu-engine/src/eval.rs

@@ -36,10 +36,10 @@ pub fn eval_call<D: DebugContext>(
             &decl.examples(),
             engine_state,
             caller_stack,
-            decl.is_parser_keyword(),
+            decl.is_keyword(),
         );
         Ok(Value::string(full_help, call.head).into_pipeline_data())
-    } else if let Some(block_id) = decl.get_block_id() {
+    } else if let Some(block_id) = decl.block_id() {
         let block = engine_state.get_block(block_id);
 
         let mut callee_stack = caller_stack.gather_captures(engine_state, &block.captures);

crates/nu-engine/src/scope.rs

@@ -111,13 +111,8 @@ impl<'e, 's> ScopeData<'e, 's> {
                     "signatures" => self.collect_signatures(&signature, span),
                     "usage" => Value::string(decl.usage(), span),
                     "examples" => Value::list(examples, span),
-                    // we can only be a is_builtin or is_custom, not both
-                    "is_builtin" => Value::bool(!decl.is_custom_command(), span),
+                    "type" => Value::string(decl.command_type().to_string(), span),
                     "is_sub" => Value::bool(decl.is_sub(), span),
-                    "is_plugin" => Value::bool(decl.is_plugin(), span),
-                    "is_custom" => Value::bool(decl.is_custom_command(), span),
-                    "is_keyword" => Value::bool(decl.is_parser_keyword(), span),
-                    "is_extern" => Value::bool(decl.is_known_external(), span),
                     "creates_scope" => Value::bool(signature.creates_scope, span),
                     "extra_usage" => Value::string(decl.extra_usage(), span),
                     "search_terms" => Value::string(decl.search_terms().join(", "), span),

crates/nu-lsp/src/lib.rs

@@ -279,7 +279,7 @@ impl LanguageServer {
 
         match id {
             Id::Declaration(decl_id) => {
-                if let Some(block_id) = working_set.get_decl(decl_id).get_block_id() {
+                if let Some(block_id) = working_set.get_decl(decl_id).block_id() {
                     let block = working_set.get_block(block_id);
                     if let Some(span) = &block.span {
                         for cached_file in working_set.files() {

crates/nu-parser/src/known_external.rs

@@ -1,5 +1,8 @@
 use nu_engine::command_prelude::*;
-use nu_protocol::ast::{Argument, Expr, Expression};
+use nu_protocol::{
+    ast::{Argument, Expr, Expression},
+    engine::CommandType,
+};
 
 #[derive(Clone)]
 pub struct KnownExternal {
@@ -22,12 +25,8 @@ impl Command for KnownExternal {
         &self.usage
     }
 
-    fn is_known_external(&self) -> bool {
-        true
-    }
-
-    fn is_builtin(&self) -> bool {
-        false
+    fn command_type(&self) -> CommandType {
+        CommandType::External
     }
 
     fn run(

crates/nu-parser/src/parse_keywords.rs

@@ -1020,7 +1020,7 @@ pub fn parse_alias(
                 } => {
                     let cmd = working_set.get_decl(rhs_call.decl_id);
 
-                    if cmd.is_parser_keyword()
+                    if cmd.is_keyword()
                         && !ALIASABLE_PARSER_KEYWORDS.contains(&cmd.name().as_bytes())
                     {
                         working_set.error(ParseError::CantAliasKeyword(

crates/nu-parser/src/parser.rs

@@ -5966,7 +5966,7 @@ pub fn discover_captures_in_expr(
         Expr::Bool(_) => {}
         Expr::Call(call) => {
             let decl = working_set.get_decl(call.decl_id);
-            if let Some(block_id) = decl.get_block_id() {
+            if let Some(block_id) = decl.block_id() {
                 match seen_blocks.get(&block_id) {
                     Some(capture_list) => {
                         // Push captures onto the outer closure that aren't created by that outer closure

crates/nu-plugin-engine/src/declaration.rs

@@ -1,6 +1,6 @@
 use nu_engine::{command_prelude::*, get_eval_expression};
 use nu_plugin_protocol::{CallInfo, EvaluatedCall};
-use nu_protocol::{PluginIdentity, PluginSignature};
+use nu_protocol::{engine::CommandType, PluginIdentity, PluginSignature};
 use std::sync::Arc;
 
 use crate::{GetPlugin, PluginExecutionCommandContext, PluginSource};
@@ -116,8 +116,8 @@ impl Command for PluginDeclaration {
         )
     }
 
-    fn is_plugin(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Plugin
     }
 
     fn plugin_identity(&self) -> Option<&PluginIdentity> {

crates/nu-protocol/src/alias.rs

@@ -1,6 +1,6 @@
 use crate::{
     ast::{Call, Expression},
-    engine::{Command, EngineState, Stack},
+    engine::{Command, CommandType, EngineState, Stack},
     PipelineData, ShellError, Signature,
 };
 
@@ -48,8 +48,8 @@ impl Command for Alias {
         })
     }
 
-    fn is_alias(&self) -> bool {
-        true
+    fn command_type(&self) -> CommandType {
+        CommandType::Alias
     }
 
     fn as_alias(&self) -> Option<&Alias> {

crates/nu-protocol/src/engine/command.rs

@@ -1,8 +1,8 @@
-use crate::{ast::Call, Alias, BlockId, Example, OutDest, PipelineData, ShellError, Signature};
-
 use super::{EngineState, Stack, StateWorkingSet};
+use crate::{ast::Call, Alias, BlockId, Example, OutDest, PipelineData, ShellError, Signature};
+use std::fmt::Display;
 
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum CommandType {
     Builtin,
     Custom,
@@ -10,7 +10,20 @@ pub enum CommandType {
     External,
     Alias,
     Plugin,
-    Other,
+}
+
+impl Display for CommandType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let str = match self {
+            CommandType::Builtin => "built-in",
+            CommandType::Custom => "custom",
+            CommandType::Keyword => "keyword",
+            CommandType::External => "external",
+            CommandType::Alias => "alias",
+            CommandType::Plugin => "plugin",
+        };
+        write!(f, "{str}")
+    }
 }
 
 pub trait Command: Send + Sync + CommandClone {
@@ -49,49 +62,29 @@ pub trait Command: Send + Sync + CommandClone {
         Vec::new()
     }
 
-    // This is a built-in command
-    fn is_builtin(&self) -> bool {
-        true
+    // Related terms to help with command search
+    fn search_terms(&self) -> Vec<&str> {
+        vec![]
     }
 
-    // This is a signature for a known external command
-    fn is_known_external(&self) -> bool {
+    // Whether can run in const evaluation in the parser
+    fn is_const(&self) -> bool {
         false
     }
 
-    // This is an alias of another command
-    fn is_alias(&self) -> bool {
-        false
-    }
-
-    // Return reference to the command as Alias
-    fn as_alias(&self) -> Option<&Alias> {
-        None
-    }
-
-    // This is an enhanced method to determine if a command is custom command or not
-    // since extern "foo" [] and def "foo" [] behaves differently
-    fn is_custom_command(&self) -> bool {
-        if self.get_block_id().is_some() {
-            true
-        } else {
-            self.is_known_external()
-        }
-    }
-
     // Is a sub command
     fn is_sub(&self) -> bool {
         self.name().contains(' ')
     }
 
-    // Is a parser keyword (source, def, etc.)
-    fn is_parser_keyword(&self) -> bool {
-        false
+    // If command is a block i.e. def blah [] { }, get the block id
+    fn block_id(&self) -> Option<BlockId> {
+        None
     }
 
-    /// Is a plugin command
-    fn is_plugin(&self) -> bool {
-        false
+    // Return reference to the command as Alias
+    fn as_alias(&self) -> Option<&Alias> {
+        None
     }
 
     /// The identity of the plugin, if this is a plugin command
@@ -100,38 +93,32 @@ pub trait Command: Send + Sync + CommandClone {
         None
     }
 
-    // Whether can run in const evaluation in the parser
-    fn is_const(&self) -> bool {
-        false
-    }
-
-    // If command is a block i.e. def blah [] { }, get the block id
-    fn get_block_id(&self) -> Option<BlockId> {
-        None
-    }
-
-    // Related terms to help with command search
-    fn search_terms(&self) -> Vec<&str> {
-        vec![]
-    }
-
     fn command_type(&self) -> CommandType {
-        match (
-            self.is_builtin(),
-            self.is_custom_command(),
-            self.is_parser_keyword(),
-            self.is_known_external(),
-            self.is_alias(),
-            self.is_plugin(),
-        ) {
-            (true, false, false, false, false, false) => CommandType::Builtin,
-            (true, true, false, false, false, false) => CommandType::Custom,
-            (true, false, true, false, false, false) => CommandType::Keyword,
-            (false, true, false, true, false, false) => CommandType::External,
-            (_, _, _, _, true, _) => CommandType::Alias,
-            (true, false, false, false, false, true) => CommandType::Plugin,
-            _ => CommandType::Other,
-        }
+        CommandType::Builtin
+    }
+
+    fn is_builtin(&self) -> bool {
+        self.command_type() == CommandType::Builtin
+    }
+
+    fn is_custom(&self) -> bool {
+        self.command_type() == CommandType::Custom
+    }
+
+    fn is_keyword(&self) -> bool {
+        self.command_type() == CommandType::Keyword
+    }
+
+    fn is_known_external(&self) -> bool {
+        self.command_type() == CommandType::External
+    }
+
+    fn is_alias(&self) -> bool {
+        self.command_type() == CommandType::Alias
+    }
+
+    fn is_plugin(&self) -> bool {
+        self.command_type() == CommandType::Plugin
     }
 
     fn pipe_redirection(&self) -> (Option<OutDest>, Option<OutDest>) {

crates/nu-protocol/src/engine/engine_state.rs

@@ -794,7 +794,7 @@ impl EngineState {
     }
 
     pub fn get_signature(&self, decl: &dyn Command) -> Signature {
-        if let Some(block_id) = decl.get_block_id() {
+        if let Some(block_id) = decl.block_id() {
             *self.blocks[block_id].signature.clone()
         } else {
             decl.signature()
@@ -814,26 +814,16 @@ impl EngineState {
 
     /// Get signatures of all commands within scope.
     ///
-    /// In addition to signatures, it returns whether each command is:
-    ///     a) a plugin
-    ///     b) custom
+    /// In addition to signatures, it returns each command's examples and type.
     pub fn get_signatures_with_examples(
         &self,
         include_hidden: bool,
-    ) -> Vec<(Signature, Vec<Example>, bool, bool, bool)> {
+    ) -> Vec<(Signature, Vec<Example>, CommandType)> {
         self.get_decls_sorted(include_hidden)
             .map(|(_, id)| {
                 let decl = self.get_decl(id);
-
                 let signature = self.get_signature(decl).update_from_command(decl);
-
-                (
-                    signature,
-                    decl.examples(),
-                    decl.is_plugin(),
-                    decl.get_block_id().is_some(),
-                    decl.is_parser_keyword(),
-                )
+                (signature, decl.examples(), decl.command_type())
             })
             .collect()
     }

crates/nu-protocol/src/pipeline/pipeline_data.rs

@@ -550,7 +550,7 @@ impl PipelineData {
             // to create the table value that will be printed in the terminal
             if let Some(decl_id) = engine_state.table_decl_id {
                 let command = engine_state.get_decl(decl_id);
-                if command.get_block_id().is_some() {
+                if command.block_id().is_some() {
                     self.write_all_and_flush(engine_state, no_newline, to_stderr)
                 } else {
                     let call = Call::new(Span::new(0, 0));

crates/nu-protocol/src/signature.rs

@@ -1,6 +1,6 @@
 use crate::{
     ast::Call,
-    engine::{Command, EngineState, Stack},
+    engine::{Command, CommandType, EngineState, Stack},
     BlockId, PipelineData, ShellError, SyntaxShape, Type, Value, VarId,
 };
 use serde::{Deserialize, Serialize};
@@ -703,7 +703,11 @@ impl Command for BlockCommand {
         })
     }
 
-    fn get_block_id(&self) -> Option<BlockId> {
+    fn command_type(&self) -> CommandType {
+        CommandType::Custom
+    }
+
+    fn block_id(&self) -> Option<BlockId> {
         Some(self.block_id)
     }
 }

src/ide.rs

@@ -145,7 +145,7 @@ pub fn goto_def(engine_state: &mut EngineState, file_path: &str, location: &Valu
     match find_id(&mut working_set, file_path, &file, location) {
         Some((Id::Declaration(decl_id), ..)) => {
             let result = working_set.get_decl(decl_id);
-            if let Some(block_id) = result.get_block_id() {
+            if let Some(block_id) = result.block_id() {
                 let block = working_set.get_block(block_id);
                 if let Some(span) = &block.span {
                     for file in working_set.files() {