1use anyhow::{anyhow, Result};
  2use async_trait::async_trait;
  3use futures::StreamExt;
  4use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};
  5use lsp::LanguageServerBinary;
  6use node_runtime::NodeRuntime;
  7use serde_json::json;
  8use smol::fs;
  9use std::{
 10    any::Any,
 11    ffi::OsString,
 12    path::{Path, PathBuf},
 13    sync::Arc,
 14};
 15use util::{async_maybe, ResultExt};
 16
 17const SERVER_PATH: &str =
 18    "node_modules/vscode-langservers-extracted/bin/vscode-css-language-server";
 19
 20fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 21    vec![server_path.into(), "--stdio".into()]
 22}
 23
 24pub struct CssLspAdapter {
 25    node: Arc<dyn NodeRuntime>,
 26}
 27
 28impl CssLspAdapter {
 29    pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
 30        CssLspAdapter { node }
 31    }
 32}
 33
 34#[async_trait]
 35impl LspAdapter for CssLspAdapter {
 36    fn name(&self) -> LanguageServerName {
 37        LanguageServerName("vscode-css-language-server".into())
 38    }
 39
 40    async fn fetch_latest_server_version(
 41        &self,
 42        _: &dyn LspAdapterDelegate,
 43    ) -> Result<Box<dyn 'static + Any + Send>> {
 44        Ok(Box::new(
 45            self.node
 46                .npm_package_latest_version("vscode-langservers-extracted")
 47                .await?,
 48        ) as Box<_>)
 49    }
 50
 51    async fn fetch_server_binary(
 52        &self,
 53        version: Box<dyn 'static + Send + Any>,
 54        container_dir: PathBuf,
 55        _: &dyn LspAdapterDelegate,
 56    ) -> Result<LanguageServerBinary> {
 57        let version = version.downcast::<String>().unwrap();
 58        let server_path = container_dir.join(SERVER_PATH);
 59
 60        if fs::metadata(&server_path).await.is_err() {
 61            self.node
 62                .npm_install_packages(
 63                    &container_dir,
 64                    &[("vscode-langservers-extracted", version.as_str())],
 65                )
 66                .await?;
 67        }
 68
 69        Ok(LanguageServerBinary {
 70            path: self.node.binary_path().await?,
 71            env: None,
 72            arguments: server_binary_arguments(&server_path),
 73        })
 74    }
 75
 76    async fn cached_server_binary(
 77        &self,
 78        container_dir: PathBuf,
 79        _: &dyn LspAdapterDelegate,
 80    ) -> Option<LanguageServerBinary> {
 81        get_cached_server_binary(container_dir, &*self.node).await
 82    }
 83
 84    async fn installation_test_binary(
 85        &self,
 86        container_dir: PathBuf,
 87    ) -> Option<LanguageServerBinary> {
 88        get_cached_server_binary(container_dir, &*self.node).await
 89    }
 90
 91    fn initialization_options(&self) -> Option<serde_json::Value> {
 92        Some(json!({
 93            "provideFormatter": true
 94        }))
 95    }
 96}
 97
 98async fn get_cached_server_binary(
 99    container_dir: PathBuf,
100    node: &dyn NodeRuntime,
101) -> Option<LanguageServerBinary> {
102    async_maybe!({
103        let mut last_version_dir = None;
104        let mut entries = fs::read_dir(&container_dir).await?;
105        while let Some(entry) = entries.next().await {
106            let entry = entry?;
107            if entry.file_type().await?.is_dir() {
108                last_version_dir = Some(entry.path());
109            }
110        }
111        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
112        let server_path = last_version_dir.join(SERVER_PATH);
113        if server_path.exists() {
114            Ok(LanguageServerBinary {
115                path: node.binary_path().await?,
116                env: None,
117                arguments: server_binary_arguments(&server_path),
118            })
119        } else {
120            Err(anyhow!(
121                "missing executable in directory {:?}",
122                last_version_dir
123            ))
124        }
125    })
126    .await
127    .log_err()
128}