clap-stdin 0.7.0

Provides a type for easily accepting Clap arguments from stdin
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

//! An example CLI replicating the functionality of the `cp` utility
//! that accepts a source path from stdin
//!
//! Example usage:
//! ```sh
//! $ find . -name Cargo.toml | cargo run --example cp -- - ./Cargo.toml.bak
//! ```
use std::path::PathBuf;

use clap::Parser;
use clap_stdin::MaybeStdin;

#[derive(Debug, Parser)]
struct Args {
    /// source file to copy from (use "-" to pass from stdin)
    source: MaybeStdin<PathBuf>,
    /// new destination file path
    dest: PathBuf,
}

fn main() -> anyhow::Result<()> {
    let args = Args::parse();
    let source = args.source.into_inner();
    let dest = args.dest;

    eprintln!("Copy from '{}' to '{}'", source.display(), dest.display());
    std::fs::copy(&source, &dest)?;
    Ok(())
}