Add paste command (#3694)

* Add paste command

* fix build and format failures

* Add examples

* Make tests pass

* Format

* add cfg annotation for Clip

* format code

* remove additional import for clip

* Remove test

crates/nu-command/src/commands/platform/mod.rs

@@ -6,6 +6,8 @@ mod clip;
 mod du;
 mod exec;
 mod kill;
+#[cfg(feature = "clipboard-cli")]
+mod paste;
 mod pwd;
 mod run_external;
 mod sleep;
@@ -20,6 +22,8 @@ pub use clip::Clip;
 pub use du::Du;
 pub use exec::Exec;
 pub use kill::Kill;
+#[cfg(feature = "clipboard-cli")]
+pub use paste::Paste;
 pub use pwd::Pwd;
 pub use run_external::RunExternalCommand;
 pub use sleep::Sleep;

crates/nu-command/src/commands/platform/paste.rs

@@ -0,0 +1,61 @@
+use crate::prelude::*;
+
+use nu_engine::WholeStreamCommand;
+use nu_errors::ShellError;
+use nu_protocol::{Primitive, ReturnSuccess, Signature, UntaggedValue};
+
+use arboard::Clipboard;
+
+pub struct Paste;
+
+impl WholeStreamCommand for Paste {
+    fn name(&self) -> &str {
+        "paste"
+    }
+
+    fn signature(&self) -> Signature {
+        Signature::build("paste")
+    }
+
+    fn usage(&self) -> &str {
+        "Paste contents from the clipboard"
+    }
+
+    fn run_with_actions(&self, args: CommandArgs) -> Result<ActionStream, ShellError> {
+        paste(args)
+    }
+
+    fn examples(&self) -> Vec<Example> {
+        vec![Example {
+            description: "Paste text from your clipboard",
+            example: "echo 'secret value' | clip | paste",
+            result: Some(vec![UntaggedValue::Primitive(Primitive::String(
+                "secret value".to_owned(),
+            ))
+            .into_value(Tag::default())]),
+        }]
+    }
+}
+
+pub fn paste(args: CommandArgs) -> Result<ActionStream, ShellError> {
+    let name = args.call_info.name_tag;
+
+    if let Ok(mut clip_context) = Clipboard::new() {
+        match clip_context.get_text() {
+            Ok(out) => Ok(ActionStream::one(ReturnSuccess::value(
+                UntaggedValue::Primitive(Primitive::String(out)),
+            ))),
+            Err(_) => Err(ShellError::labeled_error(
+                "Could not get contents of clipboard",
+                "could not get contents of clipboard",
+                name,
+            )),
+        }
+    } else {
+        Err(ShellError::labeled_error(
+            "Could not open clipboard",
+            "could not open clipboard",
+            name,
+        ))
+    }
+}

crates/nu-command/src/default_context.rs

@@ -320,7 +320,10 @@ pub fn create_default_context(interactive: bool) -> Result<EvaluationContext, Bo
 
         #[cfg(feature = "clipboard-cli")]
         {
-            context.add_commands(vec![whole_stream_command(crate::commands::Clip)]);
+            context.add_commands(vec![
+                whole_stream_command(crate::commands::Clip),
+                whole_stream_command(crate::commands::Paste),
+            ]);
         }
     }