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use std::{
io::{BufWriter, Write},
process::{Command, Stdio},
};
use cancellation::CancellationToken;
use cstree::{TextLen, TextRange};
use lsp_types::{DocumentFormattingParams, TextEdit};
use crate::{features::FeatureRequest, LineIndexExt};
pub fn format_with_latexindent(
request: &FeatureRequest<DocumentFormattingParams>,
_cancellation_token: &CancellationToken,
) -> Option<Vec<TextEdit>> {
let document = request.main_document();
let current_dir = &request.context.current_directory;
let options = request.context.options.read().unwrap();
let current_dir = match &options.root_directory {
Some(root_directory) => current_dir.join(root_directory),
None => current_dir.clone(),
};
drop(options);
let mut process = Command::new("latexindent")
.arg("-l")
.current_dir(current_dir)
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::null())
.spawn()
.ok()?;
let stdin = process.stdin.take()?;
let mut stdin = BufWriter::new(stdin);
stdin.write_all(document.text.as_bytes()).ok()?;
drop(stdin);
let output = process.wait_with_output().ok()?;
let new_text = String::from_utf8_lossy(&output.stdout).into_owned();
Some(vec![TextEdit {
range: document
.line_index
.line_col_lsp_range(TextRange::new(0.into(), document.text.text_len())),
new_text,
}])
}
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