Overhauled flag system and added compilation

Usage: wyst <file.wst> --flags

Flags:
(none) -> shows transpiled code
-r / --rust <rust_file_name> -> shows transpiled code and turns it into a rust file
-c / --compile <exe_name> -> shows transpiled code, creates a temp.rs file, compiles to an exe and deletes the temp.rs file

src/compile.rs

@@ -0,0 +1,55 @@
+use std::fs;
+use std::path::Path;
+use std::process::Command;
+use std::io::{Error, ErrorKind};
+
+pub fn write_to_rust_file(transpiled_code: &str, file_name: &str) -> Result<(), Error> {
+    // Determine the file extension based on the provided file_name
+    let mut output_file = String::from(file_name);
+    if let Some(extension) = Path::new(file_name).extension() {
+        if let Some(ext_str) = extension.to_str() {
+            // Replace the existing extension with ".rs" if it's not already ".rs"
+            if ext_str != "rs" {
+                output_file.push_str(".rs");
+            }
+        }
+    } else {
+        // If no extension is provided, append ".rs" to the file_name
+        output_file.push_str(".rs");
+    }
+
+    // Write the transpiled_code to the determined output file
+    fs::write(&output_file, transpiled_code)?;
+
+    Ok(())
+}
+
+pub fn compile_to_executable(rust_file: &str, output_exe: &str) -> Result<(), Error> {
+    let output = Command::new("rustc")
+        .arg(rust_file)
+        .arg("-o")
+        .arg(output_exe) 
+        .output()?;
+
+    // Check if compilation was successful
+    if output.status.success() {
+        println!("Compilation successful!");
+    } else {
+        if let Some(code) = output.status.code() {
+            eprintln!("Compilation failed with error code: {}", code);
+        }
+        if !output.stdout.is_empty() {
+            eprintln!("Compiler output:\n{}", String::from_utf8_lossy(&output.stdout));
+        }
+        if !output.stderr.is_empty() {
+            eprintln!("Compiler errors:\n{}", String::from_utf8_lossy(&output.stderr));
+        }
+        // Compilation failed, delete the temporary Rust file
+        if let Err(err) = fs::remove_file(rust_file) {
+            eprintln!("Failed to delete temporary Rust file: {}", err);
+        }
+        return Err(Error::new(ErrorKind::Other, "Compilation failed"));
+    }
+
+    Ok(())
+}

src/main.rs

@@ -1,15 +1,21 @@
 mod transpiler;
 mod parser;
 mod lexer;
+mod compile; 
 use std::fs;
 use clap::Parser;
 
-
-//Arguments for Wyst (short and long version)
+// Arguments for Wyst (short and long version)
 #[derive(Parser)]
 struct Args {
+    #[clap()]
+    file: std::path::PathBuf,
+
     #[clap(short, long)]
-    file: String,
+    rust: Option<String>,
+
+    #[clap(short, long)]
+    compile: Option<String>,
 }
 
 fn main() {
@@ -18,5 +24,31 @@ fn main() {
         .expect("Error reading file");
 
     let transpiled_code = transpiler::transpile(file_content, 0);
-    println!("{}", transpiled_code);
-}
+
+    match args.rust {
+        Some(ref rust_file_name) => {
+            // Write transpiled code to Rust file
+            compile::write_to_rust_file(&transpiled_code, rust_file_name)
+                .expect("Error writing to Rust file");
+            println!("Transpiled code written to {}", rust_file_name);
+        }
+        None => {
+            // No Rust file specified, print transpiled code
+            println!("{}", transpiled_code);
+        }
+    }
+
+    match args.compile {
+        Some(ref exe_name) => {
+            // Compile transpiled Rust code into executable
+            compile::write_to_rust_file(&transpiled_code, "temp.rs")
+                .expect("Error writing to temporary Rust file");
+            compile::compile_to_executable("temp.rs", exe_name)
+                .expect("Error compiling to executable");
+            fs::remove_file("temp.rs")
+                .expect("Error removing temporary Rust file");
+            println!("Compiled executable: {}", exe_name);
+        }
+        None => {}
+    }
+}