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use std::{env, error::Error, io, process};
fn run() -> Result<(), Box<dyn Error>> {
let query = match env::args().nth(1) {
None => return Err(From::from("expected 1 argument, but got none")),
Some(query) => query,
};
let mut rdr = csv::Reader::from_reader(io::stdin());
let mut wtr = csv::Writer::from_writer(io::stdout());
wtr.write_record(rdr.byte_headers()?)?;
for result in rdr.byte_records() {
let record = result?;
// `query` is a `String` while `field` is now a `&[u8]`, so we'll
// need to convert `query` to `&[u8]` before doing a comparison.
if record.iter().any(|field| field == query.as_bytes()) {
wtr.write_record(&record)?;
}
}
wtr.flush()?;
Ok(())
}
fn main() {
if let Err(err) = run() {
println!("{}", err);
process::exit(1);
}
}
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