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//! `ra_lsp_server` binary
mod args;
use lsp_server::Connection;
use ra_lsp_server::{cli, from_json, show_message, Result, ServerConfig};
use ra_prof;
use crate::args::HelpPrinted;
fn main() -> Result<()> {
setup_logging()?;
let args = match args::Args::parse()? {
Ok(it) => it,
Err(HelpPrinted) => return Ok(()),
};
match args.command {
args::Command::Parse { no_dump } => cli::parse(no_dump)?,
args::Command::Symbols => cli::symbols()?,
args::Command::Highlight { rainbow } => cli::highlight(rainbow)?,
args::Command::Stats { randomize, memory_usage, only, with_deps, path } => {
cli::analysis_stats(
args.verbosity,
memory_usage,
path.as_ref(),
only.as_ref().map(String::as_ref),
with_deps,
randomize,
)?
}
args::Command::Bench { path, what } => {
cli::analysis_bench(args.verbosity, path.as_ref(), what)?
}
args::Command::RunServer => run_server()?,
args::Command::Version => println!("rust-analyzer {}", env!("REV")),
}
Ok(())
}
fn setup_logging() -> Result<()> {
std::env::set_var("RUST_BACKTRACE", "short");
env_logger::try_init()?;
ra_prof::init();
Ok(())
}
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 =
from_json::<lsp_types::InitializeParams>("InitializeParams", 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 = initialize_params
.initialization_options
.and_then(|v| {
from_json::<ServerConfig>("config", v)
.map_err(|e| {
log::error!("{}", e);
show_message(lsp_types::MessageType::Error, e.to_string(), &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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