error : unification de la gestion des erreurs

README.md

@@ -19,3 +19,4 @@ I want to learn Rust and see how much effort I can put into making an interopera
 - [ ] PS1
 - [ ] Execute code from a file
 - [ ] Clean error handling
+- [ ] Override Ctrl-C

src/command/builtins.rs

@@ -1,4 +1,6 @@
-use crate::{error::print_error, exit_code::ExitCode};
+use crate::error;
+use crate::error::CdError;
+use crate::exit_code::ExitCode;
 
 use std::env;
 use std::{env::set_current_dir, path::PathBuf};
@@ -17,18 +19,20 @@ pub(super) fn cd(args: &Vec<String>) -> ExitCode {
 
     let exit_code: ExitCode;
     if path.is_some() {
-        exit_code = match set_current_dir(path.unwrap()) {
-            Ok(()) => ExitCode::success(),
-            Err(_e) => ExitCode::new(2),
-        };
+        let path = path.unwrap();
+        let result = set_current_dir(&path);
+
+        if result.is_err() {
+            let error = CdError::new(&args[0]);
+            error::print(Box::new(error));
+            exit_code = ExitCode::new(2);
+        } else {
+            exit_code = ExitCode::success();
+        }
     } else {
         exit_code = ExitCode::success();
     }
 
-    if exit_code.get() != 0 {
-        print_error("lol");
-    }
-
     exit_code
 }
 

src/command/mod.rs

@@ -2,7 +2,8 @@ mod builtins;
 pub mod command_builder;
 pub mod command_sequence;
 
-use crate::error::print_error;
+use crate::error;
+use crate::error::CommandNotFoundError;
 use crate::exit_code::ExitCode;
 
 type BuiltinFunction = fn(&Vec<String>) -> ExitCode;
@@ -81,11 +82,8 @@ impl Command for UnixProgram {
 
             exit_code
         } else {
-            let message = format!(
-                "{}: command not found",
-                self.command.get_program().to_str().unwrap()
-            );
-            print_error(message.as_str());
+            let error = CommandNotFoundError::new(self.command.get_program().to_str().unwrap());
+            error::print(Box::new(error));
             ExitCode::not_found()
         }
     }

src/error.rs

@@ -1,9 +1,49 @@
 use std::env;
+use std::fmt;
+use std::fmt::{Display, Formatter};
 use std::path::Path;
 
-pub fn print_error(message: &str) {
+type Error = Box<dyn Display>;
+
+pub struct CdError {
+    entry_name: String,
+}
+
+impl CdError {
+    pub fn new(entry_name: &str) -> Self {
+        Self {
+            entry_name: String::from(entry_name),
+        }
+    }
+}
+
+impl Display for CdError {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        write!(f, "cd: no such directory as '{}'", self.entry_name)
+    }
+}
+
+pub struct CommandNotFoundError {
+    command: String,
+}
+
+impl CommandNotFoundError {
+    pub fn new(command: &str) -> Self {
+        Self {
+            command: String::from(command),
+        }
+    }
+}
+
+impl Display for CommandNotFoundError {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        write!(f, "{}: command not found", self.command)
+    }
+}
+
+pub fn print(error: Error) {
     let name = env::args().next().unwrap_or(String::from("rash"));
     let name = Path::new(&name).file_name().unwrap().to_str().unwrap();
 
-    eprintln!("{}: {}", name, message);
+    eprintln!("{}: {}", name, error);
 }