Add better exit command (#369)

crates/nu-command/src/default_context.rs

@@ -1,7 +1,4 @@
-use nu_protocol::{
-    engine::{EngineState, StateWorkingSet},
-    Signature,
-};
+use nu_protocol::engine::{EngineState, StateWorkingSet};
 
 use crate::*;
 
@@ -43,6 +40,7 @@ pub fn create_default_context() -> EngineState {
             Drop,
             Each,
             Echo,
+            Exit,
             ExportCommand,
             ExportDef,
             ExportEnv,
@@ -108,6 +106,7 @@ pub fn create_default_context() -> EngineState {
             Select,
             Shuffle,
             Size,
+            Source,
             Split,
             SplitChars,
             SplitColumn,
@@ -150,10 +149,7 @@ pub fn create_default_context() -> EngineState {
         bind_command!(OpenDataFrame, ToDataFrame);
 
         // This is a WIP proof of concept
-        bind_command!(ListGitBranches, Git, GitCheckout, Source);
-
-        let sig = Signature::build("exit");
-        working_set.add_decl(sig.predeclare());
+        // bind_command!(ListGitBranches, Git, GitCheckout, Source);
 
         working_set.render()
     };

crates/nu-command/src/lib.rs

@@ -9,6 +9,7 @@ mod filesystem;
 mod filters;
 mod formats;
 mod math;
+mod shells;
 mod strings;
 mod system;
 mod viewers;
@@ -27,6 +28,7 @@ pub use filesystem::*;
 pub use filters::*;
 pub use formats::*;
 pub use math::*;
+pub use shells::*;
 pub use strings::*;
 pub use system::*;
 pub use viewers::*;

crates/nu-command/src/shells/exit.rs

@@ -0,0 +1,33 @@
+use nu_protocol::ast::Call;
+use nu_protocol::engine::{Command, EngineState, Stack};
+use nu_protocol::{Category, PipelineData, ShellError, Signature};
+
+/// Source a file for environment variables.
+#[derive(Clone)]
+pub struct Exit;
+
+impl Command for Exit {
+    fn name(&self) -> &str {
+        "exit"
+    }
+
+    fn signature(&self) -> Signature {
+        Signature::build("exit").category(Category::Shells)
+    }
+
+    fn usage(&self) -> &str {
+        "Runs a script file in the current context."
+    }
+
+    fn run(
+        &self,
+        _engine_state: &EngineState,
+        _stack: &mut Stack,
+        _call: &Call,
+        _input: PipelineData,
+    ) -> Result<PipelineData, ShellError> {
+        //TODO: add more shell support
+
+        std::process::exit(0);
+    }
+}

crates/nu-command/src/shells/mod.rs

@@ -0,0 +1,3 @@
+mod exit;
+
+pub use exit::Exit;

crates/nu-protocol/src/signature.rs

@@ -42,6 +42,7 @@ pub enum Category {
     Filters,
     Formats,
     Math,
+    Shells,
     Strings,
     System,
     Viewers,
@@ -61,6 +62,7 @@ impl std::fmt::Display for Category {
             Category::Filters => "filters",
             Category::Formats => "formats",
             Category::Math => "math",
+            Category::Shells => "shells",
             Category::Strings => "strings",
             Category::System => "system",
             Category::Viewers => "viewers",

src/main.rs

@@ -269,10 +269,6 @@ fn main() -> Result<()> {
             let input = line_editor.read_line(prompt);
             match input {
                 Ok(Signal::Success(s)) => {
-                    if s.trim() == "exit" {
-                        break;
-                    }
-
                     eval_source(
                         &mut engine_state,
                         &mut stack,