use anyhow::{anyhow, Result};use async_trait::async_trait;use collections::HashMap;use futures::StreamExt;use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};use lsp::LanguageServerBinary;use node_runtime::NodeRuntime;use serde_json::json;use smol::fs;use std::{    any::Any,    ffi::OsString,    path::{Path, PathBuf},    sync::Arc,};use util::{async_maybe, ResultExt}; const SERVER_PATH: &str = "node_modules/.bin/purescript-language-server"; fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {    vec![server_path.into(), "--stdio".into()]} pub struct PurescriptLspAdapter {    node: Arc<dyn NodeRuntime>,} impl PurescriptLspAdapter {    // todo(linux): remove    #[cfg_attr(target_os = "linux", allow(dead_code))]    pub fn new(node: Arc<dyn NodeRuntime>) -> Self {        Self { node }    }} #[async_trait(?Send)]impl LspAdapter for PurescriptLspAdapter {    fn name(&self) -> LanguageServerName {        LanguageServerName("purescript-language-server".into())    }     async fn fetch_latest_server_version(        &self,        _: &dyn LspAdapterDelegate,    ) -> Result<Box<dyn 'static + Send + Any>> {        Ok(Box::new(            self.node                .npm_package_latest_version("purescript-language-server")                .await?,        ) as Box<_>)    }     async fn fetch_server_binary(        &self,        latest_version: Box<dyn 'static + Send + Any>,        container_dir: PathBuf,        _: &dyn LspAdapterDelegate,    ) -> Result<LanguageServerBinary> {        let latest_version = latest_version.downcast::<String>().unwrap();        let server_path = container_dir.join(SERVER_PATH);        let package_name = "purescript-language-server";         let should_install_npm_package = self            .node            .should_install_npm_package(package_name, &server_path, &container_dir, &latest_version)            .await;         if should_install_npm_package {            self.node                .npm_install_packages(&container_dir, &[(package_name, latest_version.as_str())])                .await?;        }         Ok(LanguageServerBinary {            path: self.node.binary_path().await?,            env: None,            arguments: server_binary_arguments(&server_path),        })    }     async fn cached_server_binary(        &self,        container_dir: PathBuf,        _: &dyn LspAdapterDelegate,    ) -> Option<LanguageServerBinary> {        get_cached_server_binary(container_dir, &*self.node).await    }     async fn installation_test_binary(        &self,        container_dir: PathBuf,    ) -> Option<LanguageServerBinary> {        get_cached_server_binary(container_dir, &*self.node).await    }     fn initialization_options(&self) -> Option<serde_json::Value> {        Some(json!({            "purescript": {                "addSpagoSources": true            }        }))    }     fn language_ids(&self) -> HashMap<String, String> {        [("PureScript".into(), "purescript".into())]            .into_iter()            .collect()    }} async fn get_cached_server_binary(    container_dir: PathBuf,    node: &dyn NodeRuntime,) -> Option<LanguageServerBinary> {    async_maybe!({        let mut last_version_dir = None;        let mut entries = fs::read_dir(&container_dir).await?;        while let Some(entry) = entries.next().await {            let entry = entry?;            if entry.file_type().await?.is_dir() {                last_version_dir = Some(entry.path());            }        }         let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;        let server_path = last_version_dir.join(SERVER_PATH);        if server_path.exists() {            Ok(LanguageServerBinary {                path: node.binary_path().await?,                env: None,                arguments: server_binary_arguments(&server_path),            })        } else {            Err(anyhow!(                "missing executable in directory {:?}",                last_version_dir            ))        }    })    .await    .log_err()}