Cargo : version 0.2.1

Cargo.lock

@@ -4,4 +4,4 @@ version = 3
 
 [[package]]
 name = "rash"
-version = "0.2.0"
+version = "0.2.1"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rash"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

src/command.rs

@@ -12,24 +12,58 @@ impl ExitCode {
     pub fn get(&self) -> u8 {
         self.exit_code
     }
+
+    pub fn not_found() -> Self {
+        Self { exit_code: 127 }
+    }
 }
 
 pub trait Command {
     fn spawn(&self) -> ExitCode;
 }
 
+pub struct CommandSequence {
+    command: Box<dyn Command>,
+    next_command: Option<Box<dyn Command>>,
+}
+
+impl CommandSequence {
+    pub fn new(command: impl Command + 'static) -> Self {
+        Self {
+            command: Box::new(command),
+            next_command: None,
+        }
+    }
+
+    /*
+    pub fn add(&self, command: &dyn Command) {
+        if self.command.is_none() {
+            let my_box = Box::new(command.to_owned());
+            self.command = Some(my_box);
+        }
+    }
+    */
+}
+
+impl Command for CommandSequence {
+    fn spawn(&self) -> ExitCode {
+        let mut exit_code = self.command.spawn();
+
+        if self.next_command.is_some() {
+            exit_code = self.next_command.as_ref().unwrap().spawn();
+        }
+
+        exit_code
+    }
+}
+
 pub struct UnixProgram {
     argv: Vec<String>,
 }
 
 impl UnixProgram {
-    pub fn new() -> Self {
-        Self { argv: Vec::new() }
-    }
-
-    pub fn argv(&mut self, argv: Vec<String>) -> &mut Self {
-        self.argv = argv;
-        self
+    pub fn new(argv: Vec<String>) -> Self {
+        Self { argv }
     }
 }
 
@@ -53,14 +87,14 @@ impl Command for UnixProgram {
 
             let exit_code = match u8::try_from(exit_code) {
                 Ok(code) => ExitCode::new(code),
-                Err(_e) => ExitCode::new(255),
+                Err(_e) => ExitCode::new(u8::MAX),
             };
 
             exit_code
         } else {
             let message = format!("{}: command not found", &program);
             error::print_error(message);
-            ExitCode::new(127)
+            ExitCode::not_found()
         }
     }
 }

src/control.rs

@@ -1,5 +1,6 @@
-use crate::command::{Command, ExitCode, UnixProgram};
+use crate::command::{Command, ExitCode};
 use crate::interface::{get_user_input, print_prompt};
+use crate::parser::parse_command_line;
 
 fn exit(code: &ExitCode) {
     let code = i32::from(code.get());
@@ -12,19 +13,13 @@ pub fn run() {
 
     loop {
         print_prompt();
-
         let user_input = get_user_input();
 
         if user_input.is_some() {
-            let user_input = user_input.unwrap();
+            let command_sequence = parse_command_line(user_input.unwrap());
 
-            let argv: Vec<String> = user_input
-                .split_whitespace()
-                .map(|s| s.to_string())
-                .collect();
-
-            if !argv.is_empty() {
-                current_exit_code = UnixProgram::new().argv(argv).spawn();
+            if command_sequence.is_some() {
+                current_exit_code = command_sequence.unwrap().spawn();
             }
         } else {
             println!();

src/main.rs

@@ -2,6 +2,7 @@ mod command;
 mod control;
 mod error;
 mod interface;
+mod parser;
 
 fn main() {
     control::run();

src/parser.rs

@@ -0,0 +1,14 @@
+use crate::command::{CommandSequence, UnixProgram};
+
+pub fn parse_command_line(line: String) -> Option<CommandSequence> {
+    let argv: Vec<String> = line.split_whitespace().map(|s| s.to_string()).collect();
+
+    if !argv.is_empty() {
+        let command = UnixProgram::new(argv);
+        let command_sequence = CommandSequence::new(command);
+        // command_sequence.add(_command);
+        Some(command_sequence)
+    } else {
+        None
+    }
+}