2 unstable releases
0.2.0 | Sep 5, 2024 |
---|---|
0.1.0 | Jan 12, 2023 |
#9 in #cli-input
38 downloads per month
11KB
231 lines
clap-io
Easily add a --input
and --output
flags to CLIs using clap
Example
cargo run --example copy -- --help
LICENSE
Copyright © 2023 Swift Navigation
Distributed under the MIT open source license.
lib.rs
:
Add optional --input
and --output
flags to a clap command. If --input
is not specified,
it defaults to (locked) stdin. If --output
is not specified, it defaults to (locked) stdout.
Examples
Add get --input
and --output
flags to your program:
use clap::Parser;
use clap_io::InputOutput;
#[derive(Parser)]
struct Cli {
#[clap(flatten)]
io: InputOutput,
}
let cli = Cli::parse();
let mut input = cli.io.input.open().unwrap();
let mut output = cli.io.output.open().unwrap();
std::io::copy(&mut input, &mut output).unwrap();
Add just one:
use clap::Parser;
use clap_io::Input;
#[derive(Parser)]
struct Cli {
#[clap(long = "in")]
input: Input,
}
let cli = Cli::parse();
eprintln!("is tty? {}", cli.input.is_tty());
eprintln!("path? {:?}", cli.input.path());
Dependencies
~1.2–2MB
~34K SLoC