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Make ruff format idempotent when using stdin input (#7581)

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## Summary
Currently, this happens
```sh
$ echo "print()" | ruff format - 

#Notice that nothing went to stdout
```
Which does not match `ruff check --fix - ` behavior and deletes my code
every time I format it (more or less 5 times per minute 😄).

I just checked that my example works as the change was very
straightforward.
This commit is contained in:
Leiser Fernández Gallo 2023-09-21 22:50:23 +02:00 • committed by GitHub
parent d7508af48d
commit 74dbd871f8
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 6 deletions
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13
crates/ruff_cli/src/commands/format_stdin.rs
View file

@ -71,15 +71,16 @@ fn format_source(
let formatted = format_module(&unformatted, options)
.map_err(|err| FormatCommandError::FormatModule(path.map(Path::to_path_buf), err))?;
let formatted = formatted.as_code();
if mode.is_write() {
stdout()
.lock()
.write_all(formatted.as_bytes())
.map_err(|err| FormatCommandError::Write(path.map(Path::to_path_buf), err))?;
}
if formatted.len() == unformatted.len() && formatted == unformatted {
Ok(FormatCommandResult::Unchanged)
} else {
if mode.is_write() {
stdout()
.lock()
.write_all(formatted.as_bytes())
.map_err(|err| FormatCommandError::Write(path.map(Path::to_path_buf), err))?;
}
Ok(FormatCommandResult::Formatted)
}
}