Category option for signature (#343)

* category option for signature

* category option for signature

* column description for $scope

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

@@ -1,7 +1,7 @@
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{PipelineData, Signature, SyntaxShape};
+use nu_protocol::{Category, PipelineData, Signature, SyntaxShape};
 
 #[derive(Clone)]
 pub struct Cd;
@@ -16,7 +16,9 @@ impl Command for Cd {
     }
 
     fn signature(&self) -> nu_protocol::Signature {
-        Signature::build("cd").optional("path", SyntaxShape::Filepath, "the path to change to")
+        Signature::build("cd")
+            .optional("path", SyntaxShape::Filepath, "the path to change to")
+            .category(Category::FileSystem)
     }
 
     fn run(

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

@@ -6,7 +6,7 @@ use nu_engine::CallExt;
 use nu_path::canonicalize_with;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{PipelineData, ShellError, Signature, SyntaxShape};
+use nu_protocol::{Category, PipelineData, ShellError, Signature, SyntaxShape};
 
 use crate::filesystem::util::FileStructure;
 
@@ -34,6 +34,7 @@ impl Command for Cp {
             )
             .switch("force", "suppress error when no file", Some('f'))
             .switch("interactive", "ask user to confirm action", Some('i'))
+            .category(Category::FileSystem)
     }
 
     fn run(

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

@@ -3,7 +3,9 @@ use lscolors::{LsColors, Style};
 use nu_engine::eval_expression;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{IntoInterruptiblePipelineData, PipelineData, Signature, SyntaxShape, Value};
+use nu_protocol::{
+    Category, IntoInterruptiblePipelineData, PipelineData, Signature, SyntaxShape, Value,
+};
 
 #[derive(Clone)]
 pub struct Ls;
@@ -19,11 +21,13 @@ impl Command for Ls {
     }
 
     fn signature(&self) -> nu_protocol::Signature {
-        Signature::build("ls").optional(
-            "pattern",
-            SyntaxShape::GlobPattern,
-            "the glob pattern to use",
-        )
+        Signature::build("ls")
+            .optional(
+                "pattern",
+                SyntaxShape::GlobPattern,
+                "the glob pattern to use",
+            )
+            .category(Category::FileSystem)
     }
 
     fn run(

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

@@ -5,7 +5,8 @@ use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, SyntaxShape, Value,
+    Category, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, SyntaxShape,
+    Value,
 };
 
 #[derive(Clone)]
@@ -24,6 +25,7 @@ impl Command for Mkdir {
                 "the name(s) of the path(s) to create",
             )
             .switch("show-created-paths", "show the path(s) created.", Some('s'))
+            .category(Category::FileSystem)
     }
 
     fn usage(&self) -> &str {

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

@@ -5,7 +5,7 @@ use super::util::get_interactive_confirmation;
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{PipelineData, ShellError, Signature, SyntaxShape};
+use nu_protocol::{Category, PipelineData, ShellError, Signature, SyntaxShape};
 
 #[derive(Clone)]
 pub struct Mv;
@@ -34,6 +34,7 @@ impl Command for Mv {
             )
             .switch("interactive", "ask user to confirm action", Some('i'))
             .switch("force", "suppress error when no file", Some('f'))
+            .category(Category::FileSystem)
     }
 
     fn run(

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

@@ -9,7 +9,8 @@ use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, SyntaxShape, Value,
+    Category, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, SyntaxShape,
+    Value,
 };
 
 #[derive(Clone)]
@@ -55,6 +56,7 @@ impl Command for Rm {
                 SyntaxShape::GlobPattern,
                 "the file path(s) to remove",
             )
+            .category(Category::FileSystem)
     }
 
     fn run(

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

@@ -3,7 +3,7 @@ use std::fs::OpenOptions;
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{PipelineData, ShellError, Signature, SyntaxShape};
+use nu_protocol::{Category, PipelineData, ShellError, Signature, SyntaxShape};
 
 #[derive(Clone)]
 pub struct Touch;
@@ -21,6 +21,7 @@ impl Command for Touch {
                 "the path of the file you want to create",
             )
             .rest("rest", SyntaxShape::Filepath, "additional files to create")
+            .category(Category::FileSystem)
     }
 
     fn usage(&self) -> &str {