This commit is contained in:
Rowan Vixen 2024-03-08 03:17:16 -05:00
commit cf1f7a149c
4 changed files with 751 additions and 0 deletions

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/target

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name = "launchd"
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edition = "2021"
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src/main.rs Normal file
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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<Box<dyn StdErr>>,
}
impl Error {
pub fn new(kind: ErrorKind, source: Option<Box<dyn StdErr>>) -> Self {
Error { kind, source }
}
}
impl From<ErrorKind> for Error {
fn from(kind: ErrorKind) -> Self {
Self::new(kind, None)
}
}
impl<T: StdErr + 'static> From<LookupError<T>> for Error {
fn from(value: LookupError<T>) -> 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<String>,
}
fn touch<P: AsRef<Path>>(path: P) -> io::Result<()> {
match OpenOptions::new().create(true).write(true).open(path) {
Ok(_) => Ok(()),
Err(e) => Err(e),
}
}
fn make_config_path() -> Option<PathBuf> {
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<P: AsRef<Path>>(path: &Option<P>) -> Result<PathBuf, Error> {
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<P: AsRef<Path>>(path: P) -> Result<String, Error> {
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<Config, Error> {
toml::from_str(s.into()).map_err(|e| Error::new(ErrorKind::CantReadConfig, Some(Box::new(e))))
}
fn scan_wads<P: AsRef<Path>>(path: P) -> Result<Vec<PathBuf>, 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<P: AsRef<Path>>(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::<usize>()
.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<Path>>(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<String>,
#[arg(short = 'd', long, default_value_t = false)]
set_default: bool,
wad: Option<String>,
}
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(())
}