1use anyhow::{anyhow, Result};
  2use async_trait::async_trait;
  3use futures::StreamExt;
  4use language::{BundledFormatter, 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::ResultExt;
 16
 17const SERVER_PATH: &'static 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    async fn name(&self) -> LanguageServerName {
 37        LanguageServerName("vscode-css-language-server".into())
 38    }
 39
 40    fn short_name(&self) -> &'static str {
 41        "css"
 42    }
 43
 44    async fn fetch_latest_server_version(
 45        &self,
 46        _: &dyn LspAdapterDelegate,
 47    ) -> Result<Box<dyn 'static + Any + Send>> {
 48        Ok(Box::new(
 49            self.node
 50                .npm_package_latest_version("vscode-langservers-extracted")
 51                .await?,
 52        ) as Box<_>)
 53    }
 54
 55    async fn fetch_server_binary(
 56        &self,
 57        version: Box<dyn 'static + Send + Any>,
 58        container_dir: PathBuf,
 59        _: &dyn LspAdapterDelegate,
 60    ) -> Result<LanguageServerBinary> {
 61        let version = version.downcast::<String>().unwrap();
 62        let server_path = container_dir.join(SERVER_PATH);
 63
 64        if fs::metadata(&server_path).await.is_err() {
 65            self.node
 66                .npm_install_packages(
 67                    &container_dir,
 68                    &[("vscode-langservers-extracted", version.as_str())],
 69                )
 70                .await?;
 71        }
 72
 73        Ok(LanguageServerBinary {
 74            path: self.node.binary_path().await?,
 75            arguments: server_binary_arguments(&server_path),
 76        })
 77    }
 78
 79    async fn cached_server_binary(
 80        &self,
 81        container_dir: PathBuf,
 82        _: &dyn LspAdapterDelegate,
 83    ) -> Option<LanguageServerBinary> {
 84        get_cached_server_binary(container_dir, &*self.node).await
 85    }
 86
 87    async fn installation_test_binary(
 88        &self,
 89        container_dir: PathBuf,
 90    ) -> Option<LanguageServerBinary> {
 91        get_cached_server_binary(container_dir, &*self.node).await
 92    }
 93
 94    async fn initialization_options(&self) -> Option<serde_json::Value> {
 95        Some(json!({
 96            "provideFormatter": true
 97        }))
 98    }
 99
100    fn enabled_formatters(&self) -> Vec<BundledFormatter> {
101        vec![BundledFormatter::prettier("css")]
102    }
103}
104
105async fn get_cached_server_binary(
106    container_dir: PathBuf,
107    node: &dyn NodeRuntime,
108) -> Option<LanguageServerBinary> {
109    (|| async move {
110        let mut last_version_dir = None;
111        let mut entries = fs::read_dir(&container_dir).await?;
112        while let Some(entry) = entries.next().await {
113            let entry = entry?;
114            if entry.file_type().await?.is_dir() {
115                last_version_dir = Some(entry.path());
116            }
117        }
118        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
119        let server_path = last_version_dir.join(SERVER_PATH);
120        if server_path.exists() {
121            Ok(LanguageServerBinary {
122                path: node.binary_path().await?,
123                arguments: server_binary_arguments(&server_path),
124            })
125        } else {
126            Err(anyhow!(
127                "missing executable in directory {:?}",
128                last_version_dir
129            ))
130        }
131    })()
132    .await
133    .log_err()
134}