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diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..e261cca --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,11 @@ +[package] +name = "launchd" +version = "0.1.0" +edition = "2021" + +[dependencies] +clap = { version = "4.5.2", features = ["derive"] } +home = "0.5.9" +serde = { version = "1.0.197", features = ["derive"] } +shellexpand = { version = "3.1.0" } +toml = "0.8.10" diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..1284d57 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,209 @@ +use std::{ + error::Error as StdErr, + fmt::Display, + fs::{self, OpenOptions}, + io::{self, Write}, + path::{Path, PathBuf}, + process::Command, +}; + +use clap::{command, Parser}; +use serde::Deserialize; +use shellexpand::LookupError; + +const CONFIG_DIR: &'static str = "launchd"; +const CONFIG_NAME: &'static str = "config.toml"; + +#[derive(Debug)] +enum ErrorKind { + ConfigNotFound, + CantReadConfig, + DirNotFound, + CantReadDir, + InvalidInput, + NoInputGiven, + CantExecute, +} + +#[derive(Debug)] +struct Error { + kind: ErrorKind, + source: Option>, +} + +impl Error { + pub fn new(kind: ErrorKind, source: Option>) -> Self { + Error { kind, source } + } +} + +impl From for Error { + fn from(kind: ErrorKind) -> Self { + Self::new(kind, None) + } +} + +impl From> for Error { + fn from(value: LookupError) -> Self { + Self::new(ErrorKind::CantReadDir, Some(Box::new(value))) + } +} + +impl Display for Error { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match self.kind { + ErrorKind::ConfigNotFound => write!(f, "could not find config file"), + ErrorKind::CantReadConfig => write!(f, "could not read config file"), + ErrorKind::DirNotFound => write!(f, "could not find directory"), + ErrorKind::CantReadDir => write!(f, "could not read directory"), + ErrorKind::InvalidInput => write!(f, "given input is not valid"), + ErrorKind::NoInputGiven => write!(f, "input canceled by user"), + ErrorKind::CantExecute => write!(f, "couldn't launch executable"), + } + } +} + +impl StdErr for Error {} + +#[derive(Deserialize, Debug)] +pub struct Config { + pub executable_path: String, + pub wad_path: String, + pub default_wad: Option, +} + +fn touch>(path: P) -> io::Result<()> { + match OpenOptions::new().create(true).write(true).open(path) { + Ok(_) => Ok(()), + Err(e) => Err(e), + } +} + +fn make_config_path() -> Option { + home::home_dir() + .map(|p| p.join(".config")) + .filter(|p| p.exists()) + .map(|p| p.join(CONFIG_DIR)) + .filter(|p| fs::create_dir_all(p).is_ok()) + .map(|p| p.join(CONFIG_NAME)) + .filter(|p| touch(p).is_ok()) +} + +fn config_path>(path: &Option

) -> Result { + if let Some(path) = path { + let path = path.as_ref(); + if path.is_file() { + Ok(path.to_path_buf()) + } else if path.is_dir() { + config_path(&Some(path.join(CONFIG_NAME))) + } else { + Err(ErrorKind::ConfigNotFound.into()) + } + } else { + config_path(&make_config_path()) + } +} + +fn read_config>(path: P) -> Result { + fs::read_to_string(path.as_ref()) + .map_err(|e| Error::new(ErrorKind::CantReadConfig, Some(Box::new(e)))) +} + +fn parse_config<'a, S: Into<&'a str>>(s: S) -> Result { + toml::from_str(s.into()).map_err(|e| Error::new(ErrorKind::CantReadConfig, Some(Box::new(e)))) +} + +fn scan_wads>(path: P) -> Result, Error> { + let path = path.as_ref(); + + if path.is_dir() { + match fs::read_dir(path) { + Ok(v) => Ok(v.filter_map(|x| x.ok()).map(|x| x.path()).collect()), + Err(e) => Err(Error::new(ErrorKind::CantReadDir, Some(Box::new(e)))), + } + } else { + Err(Error::new(ErrorKind::DirNotFound, None)) + } +} + +fn prompt_wads>(wads: &[P]) -> Result<&str, Error> { + let mut wads = wads + .iter() + .filter_map(|p| p.as_ref().file_name()) + .filter_map(|p| p.to_str()) + .enumerate(); + + for (i, wad) in wads.clone() { + println!("{i}: {wad}"); + } + + print!("Please pick an option: "); + std::io::stdout().flush().unwrap(); + let mut input = String::new(); + + let selection = match io::stdin().read_line(&mut input) { + Ok(_) if input == "q" => Err(ErrorKind::NoInputGiven.into()), + Ok(0) => Err(ErrorKind::NoInputGiven.into()), + Ok(_) => Ok(input), + Err(e) => Err(Error::new(ErrorKind::InvalidInput, Some(Box::new(e)))), + }?; + + let selection = selection + .trim() + .parse::() + .map_err(|e| Error::new(ErrorKind::InvalidInput, Some(Box::new(e))))?; + + match wads.find(|(i, _)| *i == selection).map(|(_, wad)| wad) { + Some(v) => Ok(v), + None => Err(Error::new(ErrorKind::InvalidInput, None)), + } +} + +fn select_wad<'a, P: AsRef>(wad: &str, wads: &'a [P]) -> Option<&'a Path> { + wads.iter() + .map(|p| p.as_ref().to_str()) + .filter_map(|x| x) + .find(|p| p.contains(wad)) + .map(Path::new) +} + +#[derive(Parser, Debug)] +#[command(version, about, long_about = None)] +struct Arguments { + #[arg(short, long)] + config_path: Option, + #[arg(short = 'd', long, default_value_t = false)] + set_default: bool, + wad: Option, +} + +fn main() -> Result<(), Error> { + let args = Arguments::parse(); + let config = config_path(&args.config_path) + .and_then(read_config) + .and_then(|s| parse_config(s.as_str()))?; + + let wads = shellexpand::full(&config.wad_path) + .map_err(Into::into) + .and_then(|p| scan_wads(p.to_string()))?; + + let wad = if args.wad.is_some() { + args.wad + } else { + println!("using directory {}:", config.wad_path); + prompt_wads(&wads).map(str::to_string).ok() + }; + + if let Some(wad) = wad { + if let Some(selected) = select_wad(&wad, wads.as_slice()) { + let exec = shellexpand::full(&config.executable_path)?.to_string(); + + Command::new(&exec) + .arg(selected.as_os_str()) + .spawn() + .map_err(|e| Error::new(ErrorKind::CantExecute, Some(Box::new(e))))?; + } + } + + Ok(()) +}