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use futures::future::TryFutureExt;
use std::io;
use std::process::Stdio;
use std::time::Duration;
use tempfile::{tempdir, TempDir};
use tokio::fs;
use tokio::future::FutureExt;
use tokio_net::process::Command;
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum Format {
Latex,
Pdflatex,
Xelatex,
Lualatex,
}
impl Format {
pub fn executable(self) -> &'static str {
match self {
Self::Latex => "latex",
Self::Pdflatex => "pdflatex",
Self::Xelatex => "xelatex",
Self::Lualatex => "lualatex",
}
}
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum OutputKind {
Dvi,
Pdf,
}
#[derive(Debug)]
pub struct CompileResult {
pub log: String,
pub directory: TempDir,
}
#[derive(Debug)]
pub enum CompileError {
IO(io::Error),
NotInstalled,
Timeout,
}
impl From<io::Error> for CompileError {
fn from(error: io::Error) -> Self {
Self::IO(error)
}
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub struct CompileParams<'a> {
pub file_name: &'a str,
pub code: &'a str,
pub format: Format,
pub timeout: Duration,
}
pub async fn compile<'a>(
executable: &'a str,
args: &'a [&'a str],
params: CompileParams<'a>,
) -> Result<CompileResult, CompileError> {
let directory = tempdir()?;
let code_file = directory.path().join(params.file_name);
fs::write(code_file.clone(), params.code).await?;
Command::new(executable)
.args(args)
.current_dir(&directory)
.stdout(Stdio::null())
.stderr(Stdio::null())
.status()
.map_err(|_| CompileError::NotInstalled)
.timeout(params.timeout)
.map_err(|_| CompileError::Timeout)
.await?
.map_err(|_| CompileError::NotInstalled)?;
let log_file = code_file.with_extension("log");
let log_bytes = fs::read(log_file).await?;
let log = String::from_utf8_lossy(&log_bytes).into_owned();
Ok(CompileResult { log, directory })
}
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