# clap-file [](https://doc.rust-lang.org/cargo/reference/manifest.html#the-badges-section) [](#license) [](https://crates.io/crates/clap-file) [](https://docs.rs/clap-file) [](https://doc.rust-lang.org/cargo/reference/manifest.html#the-rust-version-field) [](https://github.com/gifnksm/clap-file/actions/workflows/ci.yml) [](https://codecov.io/gh/gifnksm/clap-file) Provides types for clap’s derive interface, enabling easy handling of input/output with automatically opened files or standard input/output based on command-line arguments. ## Usage Run `cargo add clap-file` or add this to your `Cargo.toml`: ````toml [dependencies] clap-file = "0.2.0" ```` ## Examples Example usage of [`Input`](https://docs.rs/clap-file/0.2.0/clap_file/input/struct.Input.html) ans [`Output`](https://docs.rs/clap-file/0.2.0/clap_file/output/struct.Output.html) types: ````rust,no_run use std::io::{self, BufRead as _, Write as _}; use clap::Parser as _; use clap_file::{Input, Output}; struct Args { /// Input file. If not provided, reads from standard input. input: Input, /// output file. If not provided, reads from standard output. output: Output, } fn main() -> io::Result<()> { let args = Args::parse(); let input = args.input.lock(); let mut output = args.output.lock(); for line in input.lines() { let line = line?; writeln!(&mut output, "{line}")?; } Ok(()) } ```` ## Minimum supported Rust version (MSRV) The minimum supported Rust version is **Rust 1.74.0**. At least the last 3 versions of stable Rust are supported at any given time. While a crate is a pre-release status (0.x.x) it may have its MSRV bumped in a patch release. Once a crate has reached 1.x, any MSRV bump will be accompanied by a new minor version. ## License This project is licensed under either of * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or ) * MIT license ([LICENSE-MIT](LICENSE-MIT) or ) at your option. ## Contribution Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. See [CONTRIBUTING.md](CONTRIBUTING.md).