56 lines
1.7 KiB
Rust
56 lines
1.7 KiB
Rust
use std::fs::File;
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use std::io::{Read, stdin, stdout, Write};
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use structopt::StructOpt;
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use hyperbuild::{FriendlyError, hyperbuild_friendly_error};
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#[derive(StructOpt)]
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struct Cli {
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#[structopt(short, long, parse(from_os_str))]
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src: Option<std::path::PathBuf>,
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#[structopt(short, long, parse(from_os_str))]
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out: Option<std::path::PathBuf>,
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}
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macro_rules! io_expect {
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($expr:expr, $msg:literal) => {
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match $expr {
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Ok(r) => r,
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Err(e) => {
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eprintln!("Error: {}", $msg);
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eprintln!("{}", e);
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return;
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}
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}
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};
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}
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fn main() {
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let args = Cli::from_args();
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let mut code = Vec::<u8>::new();
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let mut src_file: Box<dyn Read> = match args.src {
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Some(p) => Box::new(io_expect!(File::open(p), "could not open source file")),
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None => Box::new(stdin()),
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};
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io_expect!(src_file.read_to_end(&mut code), "could not load source code");
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match hyperbuild_friendly_error(&mut code) {
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Ok(out_len) => {
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let mut out_file: Box<dyn Write> = match args.out {
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Some(p) => Box::new(io_expect!(File::create(p), "could not open output file")),
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None => Box::new(stdout()),
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};
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io_expect!(out_file.write_all(&code[..out_len]), "could not save minified code");
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}
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Err(FriendlyError { position, message, code_context }) => {
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eprintln!("Failed at character {}:", position);
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eprintln!("{}", message);
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if args.out.is_some() {
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eprintln!("The output file has not been touched.");
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};
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eprintln!("--------");
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eprintln!("{}", code_context);
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}
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};
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}
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