Improved streams

src/commands/command.rs

@@ -4,7 +4,7 @@ use crate::prelude::*;
 use std::path::PathBuf;
 
 pub struct CommandArgs {
-    pub host: Arc<Mutex<dyn Host>>,
+    pub host: Arc<Mutex<dyn Host + Send>>,
     pub env: Arc<Mutex<Environment>>,
     pub args: Vec<Value>,
     pub input: InputStream,
@@ -37,12 +37,6 @@ pub enum ReturnValue {
 }
 
 impl ReturnValue {
-    crate fn single(value: Value) -> VecDeque<ReturnValue> {
-        let mut v = VecDeque::new();
-        v.push_back(ReturnValue::Value(value));
-        v
-    }
-
     crate fn change_cwd(path: PathBuf) -> ReturnValue {
         ReturnValue::Action(CommandAction::ChangeCwd(path))
     }

src/commands/sort_by.rs

@@ -1,6 +1,5 @@
 use crate::errors::ShellError;
 use crate::prelude::*;
-use futures::stream::BoxStream;
 
 pub fn sort_by(args: CommandArgs) -> Result<OutputStream, ShellError> {
     let fields: Result<Vec<_>, _> = args.args.iter().map(|a| a.as_string()).collect();