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//! `ra_lsp_server` binary
use lsp_server::Connection;
use ra_lsp_server::{show_message, Result, ServerConfig};
use ra_prof;
fn main() -> Result<()> {
setup_logging()?;
match Args::parse()? {
Args::Version => println!("rust-analyzer {}", env!("REV")),
Args::Run => run_server()?,
}
Ok(())
}
fn setup_logging() -> Result<()> {
std::env::set_var("RUST_BACKTRACE", "short");
env_logger::try_init()?;
ra_prof::set_filter(match std::env::var("RA_PROFILE") {
Ok(spec) => ra_prof::Filter::from_spec(&spec),
Err(_) => ra_prof::Filter::disabled(),
});
Ok(())
}
enum Args {
Version,
Run,
}
impl Args {
fn parse() -> Result<Args> {
let res =
if std::env::args().any(|it| it == "--version") { Args::Version } else { Args::Run };
Ok(res)
}
}
fn run_server() -> Result<()> {
log::info!("lifecycle: server started");
let (connection, io_threads) = Connection::stdio();
let server_capabilities = serde_json::to_value(ra_lsp_server::server_capabilities()).unwrap();
let initialize_params = connection.initialize(server_capabilities)?;
let initialize_params: lsp_types::InitializeParams = serde_json::from_value(initialize_params)?;
if let Some(client_info) = initialize_params.client_info {
log::info!("Client '{}' {}", client_info.name, client_info.version.unwrap_or_default());
}
let cwd = std::env::current_dir()?;
let root = initialize_params.root_uri.and_then(|it| it.to_file_path().ok()).unwrap_or(cwd);
let workspace_roots = initialize_params
.workspace_folders
.map(|workspaces| {
workspaces.into_iter().filter_map(|it| it.uri.to_file_path().ok()).collect::<Vec<_>>()
})
.filter(|workspaces| !workspaces.is_empty())
.unwrap_or_else(|| vec![root]);
let server_config: ServerConfig = initialize_params
.initialization_options
.and_then(|v| {
serde_json::from_value(v)
.map_err(|e| {
log::error!("failed to deserialize config: {}", e);
show_message(
lsp_types::MessageType::Error,
format!("failed to deserialize config: {}", e),
&connection.sender,
);
})
.ok()
})
.unwrap_or_default();
ra_lsp_server::main_loop(
workspace_roots,
initialize_params.capabilities,
server_config,
connection,
)?;
log::info!("shutting down IO...");
io_threads.join()?;
log::info!("... IO is down");
Ok(())
}
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