Add a run subcommand

Cargo.toml

@@ -7,11 +7,13 @@ edition = "2024"
 
 [dependencies]
 clap = { version = "4.5.30", features = ["derive"] }
+color-eyre = { version = "0.6", default-features = false }
+thiserror = "2.0.17"
 
 [[bin]]
 name = "bin_creator"
 path = "src/bin_creator.rs"
 
 [[bin]]
 name = "rmc_assemble"
-path = "src/rmc_assemble.rs"
+path = "src/assembler.rs"

src/rmc_assemble.rs → src/assembler.rs

@@ -1,5 +1,6 @@
 use clap::Parser;
 use std::{collections::HashMap, fmt, fs, io, path::PathBuf};
+use thiserror::Error;
 
 use rusty_man_computer::value::Value;
 
@@ -55,7 +56,7 @@ impl fmt::Display for ParseErrorType {
 }
 
 #[derive(Debug)]
-struct ParseError {
+pub struct ParseError {
     error: ParseErrorType,
     line: usize,
 }
@@ -206,10 +207,15 @@ fn generate_machine_code(lines: Vec<Line>) -> Result<Vec<Value>, &'static str> {
     Ok(output)
 }
 
-enum AssemblerError {
+#[derive(Error)]
+pub enum AssemblerError {
+    #[error("{0}")]
     ParseError(ParseError),
+    #[error("Machine code error: {0}")]
     MachineCodeError(&'static str),
+    #[error("Failed to read input file: {0}")]
     ReadError(io::Error),
+    #[error("Failed to write to output file: {0}")]
     WriteError(io::Error),
 }
 
@@ -224,7 +230,7 @@ impl fmt::Debug for AssemblerError {
     }
 }
 
-fn assemble(program: &str) -> Result<Vec<Value>, AssemblerError> {
+pub fn assemble(program: &str) -> Result<Vec<Value>, AssemblerError> {
     let parsed = parse_assembly(program);
     let mut valid_lines: Vec<Line> = Vec::new();
     // Only go forward with non-empty lines, and raise an error if we encounter an invalid line
@@ -254,8 +260,7 @@ pub struct Args {
     output: PathBuf,
 }
 
-fn main() -> Result<(), AssemblerError> {
-    let args = Args::parse();
+fn assemble_from_file(args: Args) -> Result<(), AssemblerError> {
     let program =
         std::fs::read_to_string(args.program).map_err(|e| AssemblerError::ReadError(e))?;
     let assembler_result = assemble(&program);
@@ -269,6 +274,11 @@ fn main() -> Result<(), AssemblerError> {
     }
 }
 
+fn main() -> Result<(), AssemblerError> {
+    let args = Args::parse();
+    assemble_from_file(args)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;