Add ! builtin to display the last status

2 files changed, 20 insertions, 13 deletions

diff --git a/src/builtins.rs b/src/builtins.rs
index ac83efa..bcc14f1 100644
--- a/src/builtins.rs
+++ b/src/builtins.rs
@@ -1,12 +1,13 @@
-use std::path::Path;
+use std::io::{Error, ErrorKind};
+use std::path::{Path, PathBuf};
 use std::process::Command;
 
-pub fn cd(
-    args: &[&str],
-    home: &std::path::PathBuf,
-) -> Result<std::path::PathBuf, std::string::String> {
+pub fn cd(args: &[&str], home: &PathBuf) -> Result<PathBuf, Error> {
     if args.len() > 1 {
-        return Err("Too many arguments passed to cd".to_string());
+        return Err(Error::new(
+            ErrorKind::InvalidInput,
+            "Too many arguments passed to cd",
+        ));
     }
 
     if args.len() == 0 {
@@ -20,13 +21,13 @@ pub fn cd(
 
     match std::env::set_current_dir(&root) {
         Ok(_) => Ok(root.to_path_buf()),
-        Err(e) => Err(format!("Could not set current dir: {}", e)),
+        Err(e) => Err(e),
     }
 }
 
-pub fn run(command: &str, args: &[&str]) {
-    let mut child = Command::new(command).args(args).spawn().unwrap();
-    child.wait().unwrap();
+pub fn run(command: &str, args: &[&str]) -> Result<std::process::ExitStatus, Error> {
+    let mut child = Command::new(command).args(args).spawn()?;
+    child.wait()
 }
 /*
     match command {
diff --git a/src/main.rs b/src/main.rs
index aa6998d..24aa9b8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,6 +13,7 @@ fn main() {
 
     let prompt = prompt::Prompt::new().unwrap();
     let mut cwd = std::env::current_dir().unwrap();
+    let mut status = None; //: std::process::ExitStatus;
 
     // `()` can be used when no completer is required
     let mut rl = Editor::<()>::new();
@@ -26,6 +27,7 @@ fn main() {
                 rl.add_history_entry(line.as_str());
                 let commands = parser::parse(&line);
                 match commands[0] {
+                    "!" => println!("{:?}", status),
                     "cd" => match builtins::cd(&commands[1..], &prompt.home) {
                         Ok(p) => cwd = p,
                         Err(e) => eprintln!("Error: {}", e),
@@ -33,9 +35,13 @@ fn main() {
                     "exit" => {
                         break 'repl;
                     }
-                    _ => {
-                        builtins::run(commands[0], &commands[1..]);
-                    }
+                    _ => match builtins::run(commands[0], &commands[1..]) {
+                        Ok(s) => { 
+                            println!("Ok({})", s);
+                            status = Some(s);
+                        },
+                        Err(e) => println!("Err({})", e),
+                    },
                 }
                 //println!("Line: {}", line);
             }