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a/src/bin/rga-preproc.rs +++ b/src/bin/rga-preproc.rs @@ -5,63 +5,46 @@ use std::fmt; use std::path::Path; use tree_magic; -#[derive(Debug)] -struct ShittyError; - -impl Error for ShittyError {} - -impl fmt::Display for ShittyError { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!(f, "ShittyError") - } +// lazy error +fn lerr(inp: impl AsRef) -> Box { + return inp.as_ref().into(); } fn main() -> Result<(), Box> { let adapters = init_adapters()?; - //let ad = &adapters[0]; - //let z: &str = &ad.metadata().name; + let filepath = std::env::args() + .skip(1) + .next() + .ok_or(lerr("No filename specified"))?; + println!("fname: {}", filepath); + let path = Path::new(&filepath); + let filename = path.file_name().ok_or(lerr("Empty filename"))?; - // todo: how to make this less indenty? - match std::env::args().skip(1).next() { - Some(filepath) => { - println!("fname: {}", filepath); - let path = Path::new(&filepath); - let maybe_filename = path.file_name(); - match maybe_filename { - Some(filename) => { - let result = tree_magic::from_filepath(path); - match result { - Some(mimetype) => { - println!("mimetype: {:?}", mimetype); - let adapter = adapters(FileMeta { - mimetype, - lossy_filename: filename.to_string_lossy().to_string(), - }); - match adapter { - Some(ad) => { - println!("adapter: {}", &ad.metadata().name); - let stdouti = std::io::stdout(); - let mut stdout = stdouti.lock(); - ad.adapt(&filepath, &mut stdout)?; - Ok(()) - } - None => { - eprintln!("no adapter for that file, running cat!"); - let stdini = std::io::stdin(); - let mut stdin = stdini.lock(); - let stdouti = std::io::stdout(); - let mut stdout = stdouti.lock(); - std::io::copy(&mut stdin, &mut stdout)?; - Ok(()) - } - } - } - None => Err("file does not exist".into()), - } - } - None => Err("Empty filename".into()), - } + let mimetype = tree_magic::from_filepath(path).ok_or(lerr(format!( + "File {} does not exist", + filename.to_string_lossy() + )))?; + println!("mimetype: {:?}", mimetype); + let adapter = adapters(FileMeta { + mimetype, + lossy_filename: filename.to_string_lossy().to_string(), + }); + match adapter { + Some(ad) => { + println!("adapter: {}", &ad.metadata().name); + let stdouti = std::io::stdout(); + let mut stdout = stdouti.lock(); + ad.adapt(&filepath, &mut stdout)?; + Ok(()) + } + None => { + eprintln!("no adapter for that file, running cat!"); + let stdini = std::io::stdin(); + let mut stdin = stdini.lock(); + let stdouti = std::io::stdout(); + let mut stdout = stdouti.lock(); + std::io::copy(&mut stdin, &mut stdout)?; + Ok(()) } - None => Err("No filename specified".into()), } }