6 releases (3 breaking)
0.4.1 | Mar 24, 2020 |
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0.4.0 | Sep 26, 2017 |
0.3.1 | Apr 6, 2017 |
0.3.0 | Feb 12, 2017 |
0.1.0 | Nov 19, 2016 |
#10 in #file-input
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Used in 12 crates
7KB
100 lines
Introduction
A pattern that often occurs in UNIX utilities is:
- You want to read from a file when a filename argument is provided, otherwise from stdin.
- You want to write to a file when a filename argument is provided, otherwise to stdout.
This is a small crate that accommodates that pattern.
Note: This package is still new, its API will change.
Installation
This package can be used with Cargo:
[dependencies]
stdinout = 0.1
lib.rs
:
A pattern that often occurs when writing command-line utilities is that one wants to open a file when a filename argument is provided or read/write from/to stdin/stdout otherwise. Unfortunatlely, this is more work in Rust than it should be.
The stdinout
crate provides a small wrapper that makes it easier
to handle this scenario.
For reading from a file or the standard input:
let input = Input::from(matches.free.get(0));
let reader = or_exit(input.buf_read());
for line in reader.lines() {
// Use 'line'
}
For writing to a file or the standard output:
let output = Output::from(args.get(1));
// Get an object that implements the Write trait.
let write = output.write().unwrap();