diff options
Diffstat (limited to 'crates/xa65')
| -rw-r--r-- | crates/xa65/Cargo.toml | 3 | ||||
| -rw-r--r-- | crates/xa65/src/main.rs | 120 |
2 files changed, 91 insertions, 32 deletions
diff --git a/crates/xa65/Cargo.toml b/crates/xa65/Cargo.toml index 1ecceb0..1a2c52c 100644 --- a/crates/xa65/Cargo.toml +++ b/crates/xa65/Cargo.toml @@ -3,6 +3,3 @@ name = "xa65" version = "0.1.0" edition = "2021" authors = ["Miquel Sabaté Solà <mikisabate@gmail.com>"] - -[dependencies] -clap = { version = "^4", features = ["derive"] } diff --git a/crates/xa65/src/main.rs b/crates/xa65/src/main.rs index 8a31e7b..cdfce59 100644 --- a/crates/xa65/src/main.rs +++ b/crates/xa65/src/main.rs @@ -1,30 +1,101 @@ -use clap::Parser as ClapParser; use std::path::PathBuf; use std::process::Command; -/// Bridge between 'nasm' and 'ca65'. -#[derive(ClapParser, Debug)] -#[command(version, about, long_about = None)] +/// Version for this program. +const VERSION: &str = "0.1.0"; + +// Arguments for this application. See `parse_arguments` on how it's filled. +#[derive(Default)] struct Args { - /// Assemble the instructions given on this file. file: String, - - /// Linker configuration to be used. This configuration can be an identifier - /// for the configurations already baked in into this application, or it can - /// be a file path to a configuration of your choosing. See the - /// documentation for more information on this format. Defaults to 'nrom'. - #[arg(short = 'C', long = "config")] config: Option<String>, - - /// Used for compatibility with 'ca65'. - #[arg(long)] target: Option<String>, - - /// Place the output into the given <OUT> file. - #[arg(short = 'o', long)] out: String, } +// Print the help message and quit. +fn print_help() { + println!("Bridge between 'nasm' and 'ca65'.\n"); + println!("usage: xa65 [OPTIONS] <FILE>\n"); + println!("Options:"); + println!(" -C, --config <FILE>\tLinker configuration to be used, whether an identifier or a file path."); + println!(" -o, --out <FILE>\tFile path where the output should be located after execution."); + println!(" --target nes\t\tUsed for compatibility with 'ca65'."); + std::process::exit(0); +} + +// Parse the arguments given to the program and returns an Args object with the +// given information. +fn parse_arguments() -> Args { + let mut args = std::env::args(); + let mut res = Args::default(); + + // Skip command name. + args.next(); + + while let Some(arg) = args.next() { + match arg.as_str() { + "-C" | "--config" => match res.config { + Some(_) => die("only specify the '-C/--config' flag once".to_string()), + None => match args.next() { + Some(v) => res.config = Some(v), + None => { + die("you need to provide a value for the '-C/--config' flag".to_string()) + } + }, + }, + "-h" | "--help" => print_help(), + "-o" | "--out" => { + if res.out.is_empty() { + match args.next() { + Some(v) => res.out = v, + None => { + die("you need to provide a value for the '-o/--out' flag".to_string()) + } + } + } else { + die("only specify the '-o/--out' flag once".to_string()); + } + } + "--target" => match res.target { + Some(_) => die("only specify the '--target' flag once".to_string()), + None => match args.next() { + Some(v) => { + let real = v.to_lowercase(); + if real != "nes" { + die("the '--target' flag only accepts 'nes' as a value".to_string()); + } + res.target = Some(real) + } + None => die("you need to provide a value for the '--target' flag".to_string()), + }, + }, + "-v" | "--version" => { + println!("xa65 {}", VERSION); + std::process::exit(0); + } + _ => { + if arg.starts_with('-') { + die(format!("don't know how to handle the '{}' flag", arg)); + } + if !res.file.is_empty() { + die("cannot have multiple source files".to_string()); + } + res.file = arg; + } + } + } + + if res.file.is_empty() { + die("you need to specify a source file".to_string()); + } + if res.out.is_empty() { + die("you need to specify an output file with '-o/--output'".to_string()); + } + + res +} + // Print the given `message` and exit(1). fn die(message: String) { eprintln!("error: {}", message); @@ -80,18 +151,9 @@ fn main() { return; } }; - let args = Args::parse(); - - // Sanity check on the target flag from 'ca65'. - if let Some(target) = args.target { - if target != "nes" { - die(format!( - "the target has to be 'nes', but '{}' was provided instead", - target - )); - return; - } - } + + // Parse arguments. + let args = parse_arguments(); // Generate a temporary directory in which both binary files will be placed // as an intermediate step. |