table as string output

crates/nu-command/src/run_external.rs

@@ -117,7 +117,6 @@ impl<'call, 'contex> ExternalCommand<'call, 'contex> {
             Ok(mut child) => {
                 // if there is a string or a stream, that is sent to the pipe std
                 match input {
-                    Value::Nothing { span: _ } => (),
                     Value::String { val, span: _ } => {
                         if let Some(mut stdin_write) = child.stdin.take() {
                             self.write_to_stdin(&mut stdin_write, val.as_bytes())?
@@ -143,12 +142,7 @@ impl<'call, 'contex> ExternalCommand<'call, 'contex> {
                             }
                         }
                     }
-                    _ => {
+                    _ => (),
-                        return Err(ShellError::ExternalCommand(
-                            "Input is not string or binary".to_string(),
-                            self.name.span,
-                        ))
-                    }
                 }
 
                 // If this external is not the last expression, then its output is piped to a channel

crates/nu-command/src/table.rs

@@ -65,7 +65,11 @@ fn convert_to_table(iter: impl IntoIterator<Item = Value>) -> Option<nu_table::T
     let mut iter = iter.into_iter().peekable();
 
     if let Some(first) = iter.peek() {
-        let mut headers = first.columns();
+        let mut headers = match first {
+            Value::Record { .. } => first.columns(),
+            _ => ["Column_0".to_string()].to_vec(),
+        };
+
         headers.insert(0, "#".into());
 
         let mut data = vec![];
@@ -74,10 +78,13 @@ fn convert_to_table(iter: impl IntoIterator<Item = Value>) -> Option<nu_table::T
             let mut row = vec![row_num.to_string()];
 
             for header in headers.iter().skip(1) {
-                let result = item.clone().follow_cell_path(&[PathMember::String {
+                let result = match item {
+                    Value::Record { .. } => item.clone().follow_cell_path(&[PathMember::String {
                         val: header.into(),
                         span: Span::unknown(),
-                }]);
+                    }]),
+                    _ => Ok(item.clone()),
+                };
 
                 match result {
                     Ok(value) => row.push(value.into_string()),

src/main.rs

@@ -4,6 +4,7 @@ use nu_command::create_default_context;
 use nu_engine::eval_block;
 use nu_parser::parse;
 use nu_protocol::{
+    ast::Call,
     engine::{EngineState, EvaluationContext, StateWorkingSet},
     Value,
 };
@@ -126,7 +127,19 @@ fn main() -> Result<()> {
 
                     match eval_block(&state, &block, Value::nothing()) {
                         Ok(value) => {
-                            println!("{}", value.into_string());
+                            // If the table function is in the declarations, then we can use it
+                            // to create the table value that will be printed in the terminal
+                            let engine_state = engine_state.borrow();
+                            let output = match engine_state.find_decl("table".as_bytes()) {
+                                Some(decl_id) => {
+                                    let command = engine_state.get_decl(decl_id);
+
+                                    let table = command.run(&state, &Call::new(), value)?;
+                                    table.into_string()
+                                }
+                                None => value.into_string(),
+                            };
+                            println!("{}", output);
                         }
                         Err(err) => {
                             let engine_state = engine_state.borrow();