rune-languageserver 0.12.0

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//! The language server for the [Rune language].
//!
//! [Rune Language]: https://rune-rs.github.io

use anyhow::{bail, Result};
use rune::Options;
use std::env;
use std::path::PathBuf;
use tracing_appender::non_blocking::WorkerGuard;

fn setup_logging() -> Result<Option<WorkerGuard>> {
    let mut guard = None;

    // Set environment variable to get the language server to trace log to the
    // given file.
    if let Some(log_path) = std::env::var_os("RUNE_TRACE_LOG_FILE") {
        let log_path = PathBuf::from(log_path);

        if let (Some(d), Some(name)) = (log_path.parent(), log_path.file_name()) {
            let file_appender = tracing_appender::rolling::never(d, name);

            let (non_blocking, g) = tracing_appender::non_blocking(file_appender);

            tracing_subscriber::fmt()
                .with_max_level(tracing::Level::TRACE)
                .with_writer(non_blocking)
                .init();

            guard = Some(g);
        }
    }

    Ok(guard)
}

fn main() -> Result<()> {
    let _guard = setup_logging()?;

    let mut it = env::args();
    it.next();

    #[allow(clippy::never_loop)]
    for arg in it {
        match arg.as_str() {
            "--version" => {
                println!("Rune language server {}", rune_languageserver::VERSION);
                return Ok(());
            }
            other => {
                bail!("Unsupported option: {}", other);
            }
        }
    }

    let mut context = rune_modules::default_context()?;
    context.install(&rune_modules::experiments::module(true)?)?;

    let mut options = Options::default();
    options.macros(true);

    rune_languageserver::run(context, options)
}