lsp: Refactor capabilities as an async OnceCell
First step in making LSP init asynchronous
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parent
41f1e8e4fb
commit
c3a58cdadd
2 changed files with 40 additions and 24 deletions
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@ -13,7 +13,10 @@ use std::sync::atomic::{AtomicU64, Ordering};
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use tokio::{
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io::{BufReader, BufWriter},
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process::{Child, Command},
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sync::mpsc::{channel, UnboundedReceiver, UnboundedSender},
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sync::{
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mpsc::{channel, UnboundedReceiver, UnboundedSender},
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OnceCell,
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},
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};
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#[derive(Debug)]
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@ -22,7 +25,7 @@ pub struct Client {
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_process: Child,
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server_tx: UnboundedSender<Payload>,
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request_counter: AtomicU64,
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capabilities: Option<lsp::ServerCapabilities>,
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pub(crate) capabilities: OnceCell<lsp::ServerCapabilities>,
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offset_encoding: OffsetEncoding,
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config: Option<Value>,
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}
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@ -57,14 +60,11 @@ impl Client {
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_process: process,
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server_tx,
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request_counter: AtomicU64::new(0),
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capabilities: None,
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capabilities: OnceCell::new(),
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offset_encoding: OffsetEncoding::Utf8,
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config,
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};
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// TODO: async client.initialize()
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// maybe use an arc<atomic> flag
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Ok((client, server_rx))
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}
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@ -90,7 +90,7 @@ impl Client {
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pub fn capabilities(&self) -> &lsp::ServerCapabilities {
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self.capabilities
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.as_ref()
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.get()
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.expect("language server not yet initialized!")
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}
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@ -151,7 +151,7 @@ impl Client {
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}
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/// Send a RPC notification to the language server.
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fn notify<R: lsp::notification::Notification>(
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pub fn notify<R: lsp::notification::Notification>(
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&self,
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params: R::Params,
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) -> impl Future<Output = Result<()>>
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@ -213,7 +213,7 @@ impl Client {
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// General messages
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// -------------------------------------------------------------------------------------------
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pub(crate) async fn initialize(&mut self) -> Result<()> {
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pub(crate) async fn initialize(&self) -> Result<lsp::InitializeResult> {
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// TODO: delay any requests that are triggered prior to initialize
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let root = find_root(None).and_then(|root| lsp::Url::from_file_path(root).ok());
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@ -281,14 +281,7 @@ impl Client {
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locale: None, // TODO
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};
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let response = self.request::<lsp::request::Initialize>(params).await?;
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self.capabilities = Some(response.capabilities);
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// next up, notify<initialized>
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self.notify::<lsp::notification::Initialized>(lsp::InitializedParams {})
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.await?;
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Ok(())
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self.request::<lsp::request::Initialize>(params).await
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}
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pub async fn shutdown(&self) -> Result<()> {
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@ -445,7 +438,7 @@ impl Client {
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) -> Option<impl Future<Output = Result<()>>> {
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// figure out what kind of sync the server supports
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let capabilities = self.capabilities.as_ref().unwrap();
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let capabilities = self.capabilities.get().unwrap();
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let sync_capabilities = match capabilities.text_document_sync {
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Some(lsp::TextDocumentSyncCapability::Kind(kind))
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@ -496,7 +489,7 @@ impl Client {
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text_document: lsp::TextDocumentIdentifier,
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text: &Rope,
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) -> Result<()> {
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let capabilities = self.capabilities.as_ref().unwrap();
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let capabilities = self.capabilities.get().unwrap();
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let include_text = match &capabilities.text_document_sync {
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Some(lsp::TextDocumentSyncCapability::Options(lsp::TextDocumentSyncOptions {
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@ -590,7 +583,7 @@ impl Client {
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options: lsp::FormattingOptions,
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work_done_token: Option<lsp::ProgressToken>,
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) -> anyhow::Result<Vec<lsp::TextEdit>> {
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let capabilities = self.capabilities.as_ref().unwrap();
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let capabilities = self.capabilities.get().unwrap();
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// check if we're able to format
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match capabilities.document_formatting_provider {
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@ -618,7 +611,7 @@ impl Client {
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options: lsp::FormattingOptions,
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work_done_token: Option<lsp::ProgressToken>,
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) -> anyhow::Result<Vec<lsp::TextEdit>> {
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let capabilities = self.capabilities.as_ref().unwrap();
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let capabilities = self.capabilities.get().unwrap();
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// check if we're able to format
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match capabilities.document_range_formatting_provider {
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@ -312,17 +312,40 @@ impl Registry {
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Entry::Vacant(entry) => {
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// initialize a new client
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let id = self.counter.fetch_add(1, Ordering::Relaxed);
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let (mut client, incoming) = Client::start(
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let (client, incoming) = Client::start(
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&config.command,
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&config.args,
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serde_json::from_str(language_config.config.as_deref().unwrap_or("")).ok(),
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id,
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)?;
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// TODO: run this async without blocking
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futures_executor::block_on(client.initialize())?;
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s_incoming.push(UnboundedReceiverStream::new(incoming));
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let client = Arc::new(client);
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let _client = client.clone();
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let initialize = tokio::spawn(async move {
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use futures_util::TryFutureExt;
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let value = _client
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.capabilities
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.get_or_try_init(|| {
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_client
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.initialize()
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.map_ok(|response| response.capabilities)
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})
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.await;
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value.expect("failed to initialize capabilities");
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// next up, notify<initialized>
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_client
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.notify::<lsp::notification::Initialized>(lsp::InitializedParams {})
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.await
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.unwrap();
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});
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// TODO: remove this block
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futures_executor::block_on(initialize).map_err(|_| anyhow::anyhow!("bail"))?;
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entry.insert((id, client.clone()));
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Ok(client)
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}
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