ruff/crates/ruff_cli/src/stdin.rs
Charlie Marsh 7968e190dd
Write unchanged, excluded files to stdout when read via stdin (#8596)
## Summary

When you run Ruff via stdin, and pass `format` or `check --fix`, we
typically write the changed or unchanged contents to stdout. It turns
out we forgot to do this when the file is _excluded_, so if you run
`ruff format /path/to/excluded/file.py`, we don't write _anything_ to
`stdout`. This led to a bug in the LSP whereby we deleted file contents
for third-party files.

The right thing to do here is write back the unchanged contents, as it
should always be safe to write the output of stdout back to a file.
2023-11-09 23:15:01 -05:00

17 lines
506 B
Rust

use std::io;
use std::io::{Read, Write};
/// Read a string from `stdin`.
pub(crate) fn read_from_stdin() -> Result<String, io::Error> {
let mut buffer = String::new();
io::stdin().lock().read_to_string(&mut buffer)?;
Ok(buffer)
}
/// Read bytes from `stdin` and write them to `stdout`.
pub(crate) fn parrot_stdin() -> Result<(), io::Error> {
let mut buffer = String::new();
io::stdin().lock().read_to_string(&mut buffer)?;
io::stdout().write_all(buffer.as_bytes())?;
Ok(())
}