Cargo : 0.4.0 -> 0.5.0

Cargo.lock

@@ -4,4 +4,4 @@ version = 3
 
 [[package]]
 name = "rash"
-version = "0.4.0"
+version = "0.5.0"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rash"
-version = "0.4.0"
+version = "0.5.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

README.md

@@ -7,14 +7,15 @@ I want to learn Rust and see how much effort I can put into making an interopera
 # Roadmap
 
 - [x] Execute commands
-- [ ] Parse commands
+- [x] Parse commands
 - [ ] Variables
 - [ ] Environment variables
 - [ ] Builtins
-  - [ ] `cd`
+  - [x] `cd`
   - [ ] `set`
   - [ ] `alias`
   - [ ] `type`
 - [ ] Command-line flags
 - [ ] PS1
 - [ ] Execute code from a file
+- [ ] Clean error handling

src/command/builtins.rs

@@ -3,7 +3,7 @@ use crate::{error::print_error, exit_code::ExitCode};
 use std::env;
 use std::{env::set_current_dir, path::PathBuf};
 
-pub fn cd(args: &Vec<String>) -> ExitCode {
+pub(super) fn cd(args: &Vec<String>) -> ExitCode {
     let path: Option<PathBuf>;
 
     if !args.is_empty() {
@@ -31,3 +31,7 @@ pub fn cd(args: &Vec<String>) -> ExitCode {
 
     exit_code
 }
+
+pub(super) fn colon(_args: &Vec<String>) -> ExitCode {
+    ExitCode::success()
+}

src/command/command_sequence.rs

@@ -1,4 +1,4 @@
-use crate::command::Command;
+use super::Command;
 use crate::exit_code::ExitCode;
 
 pub struct CommandSequence {

src/command/mod.rs

@@ -24,9 +24,15 @@ impl Builtin {
         let mut args = argv.clone();
         let program = args.remove(0);
 
-        if program == "cd" {
+        let function: Option<BuiltinFunction> = match program.as_str() {
+            "cd" => Some(builtins::cd),
+            ":" => Some(builtins::colon),
+            _ => None,
+        };
+
+        if function.is_some() {
             Ok(Self {
-                function: builtins::cd,
+                function: function.unwrap(),
                 args,
             })
         } else {

src/error.rs

@@ -1,7 +1,8 @@
+use std::env;
 use std::path::Path;
 
 pub fn print_error(message: &str) {
-    let name = std::env::args().next().unwrap();
+    let name = env::args().next().unwrap_or(String::from("rash"));
     let name = Path::new(&name).file_name().unwrap().to_str().unwrap();
 
     eprintln!("{}: {}", name, message);

src/parser.rs

@@ -1,20 +1,29 @@
 use crate::command::command_builder::CommandBuilder;
 use crate::command::command_sequence::CommandSequence;
 
-fn parse_quote(characters: &mut Vec<char>) -> Result<String, UnmatchedQuoteError> {
-    if characters.is_empty() {
-        Err(UnmatchedQuoteError)
-    } else {
-        let mut quoted_arg = String::default();
+fn parse_quote(characters: &mut Vec<char>) -> String {
+    let mut quoted = String::default();
+
+    if !characters.is_empty() {
         let mut current_char = characters.pop().unwrap();
 
         while !characters.is_empty() && current_char != '\'' {
-            quoted_arg.push(current_char);
+            quoted.push(current_char);
             current_char = characters.pop().unwrap();
         }
-
-        Ok(quoted_arg)
     }
+
+    quoted
+}
+
+fn parse_backslash(characters: &mut Vec<char>) -> Option<char> {
+    let mut escaped_char: Option<char> = None;
+
+    if !characters.is_empty() {
+        escaped_char = Some(characters.pop().unwrap());
+    }
+
+    escaped_char
 }
 
 fn parse_main(characters: &mut Vec<char>, current_arg: &mut String) -> Vec<String> {
@@ -26,24 +35,31 @@ fn parse_main(characters: &mut Vec<char>, current_arg: &mut String) -> Vec<Strin
         if current_char.is_whitespace() {
             if !current_arg.is_empty() {
                 let mut argv: Vec<String> = vec![current_arg.clone()];
-                argv.append(&mut parse_main(characters, &mut String::from("")));
+                argv.append(&mut parse_main(characters, &mut String::default()));
 
                 argv
             } else {
                 parse_main(characters, current_arg)
             }
-        /*
         } else if current_char == '\\' {
-            current_arg.push(characters.pop().unwrap());
+            let escaped_char = parse_backslash(characters);
+
+            if escaped_char.is_some() {
+                current_arg.push(escaped_char.unwrap());
+            }
+
             parse_main(characters, current_arg)
-        */
         } else if current_char == '\'' {
-            let mut argv = vec![parse_quote(characters).unwrap()];
-            argv.append(&mut parse_main(characters, &mut String::default()));
+            current_arg.push_str(parse_quote(characters).as_str());
+            parse_main(characters, current_arg)
+        } else if current_char == ';' {
+            let mut argv: Vec<String> = vec![];
+
+            if !current_arg.is_empty() {
+                argv.push(current_arg.clone());
+            }
 
             argv
-        } else if current_char == ';' {
-            vec![]
         } else {
             current_arg.push(current_char);
             parse_main(characters, current_arg)