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behead.rs
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behead.rs
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static USAGE: &str = r#"
Drop a CSV file's header.
Usage:
qsv behead [options] [<input>]
qsv behead --help
Common options:
-h, --help Display this message
-f, --flexible Do not validate if the CSV has different number of
fields per record, increasing performance.
-o, --output <file> Write output to <file> instead of stdout.
"#;
use serde::Deserialize;
use crate::{config::Config, util, CliResult};
#[derive(Deserialize)]
struct Args {
arg_input: Option<String>,
flag_flexible: bool,
flag_output: Option<String>,
}
pub fn run(argv: &[&str]) -> CliResult<()> {
let args: Args = util::get_args(USAGE, argv)?;
let conf = Config::new(&args.arg_input).no_headers(false);
let mut rdr = conf.flexible(args.flag_flexible).reader()?;
// write is always flexible for performance
let mut wtr = Config::new(&args.flag_output).flexible(true).writer()?;
let mut record = csv::ByteRecord::new();
while rdr.read_byte_record(&mut record)? {
wtr.write_byte_record(&record)?;
}
Ok(wtr.flush()?)
}