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::ResultExt;
 16
 17const SERVER_PATH: &'static str =
 18    "node_modules/vscode-langservers-extracted/bin/vscode-html-language-server";
 19
 20fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 21    vec![server_path.into(), "--stdio".into()]
 22}
 23
 24pub struct HtmlLspAdapter {
 25    node: Arc<NodeRuntime>,
 26}
 27
 28impl HtmlLspAdapter {
 29    pub fn new(node: Arc<NodeRuntime>) -> Self {
 30        HtmlLspAdapter { node }
 31    }
 32}
 33
 34#[async_trait]
 35impl LspAdapter for HtmlLspAdapter {
 36    async fn name(&self) -> LanguageServerName {
 37        LanguageServerName("vscode-html-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            arguments: server_binary_arguments(&server_path),
 72        })
 73    }
 74
 75    async fn cached_server_binary(
 76        &self,
 77        container_dir: PathBuf,
 78        _: &dyn LspAdapterDelegate,
 79    ) -> Option<LanguageServerBinary> {
 80        get_cached_server_binary(container_dir, &self.node).await
 81    }
 82
 83    async fn installation_test_binary(
 84        &self,
 85        container_dir: PathBuf,
 86    ) -> Option<LanguageServerBinary> {
 87        get_cached_server_binary(container_dir, &self.node).await
 88    }
 89
 90    async fn initialization_options(&self) -> Option<serde_json::Value> {
 91        Some(json!({
 92            "provideFormatter": true
 93        }))
 94    }
 95}
 96
 97async fn get_cached_server_binary(
 98    container_dir: PathBuf,
 99    node: &NodeRuntime,
100) -> Option<LanguageServerBinary> {
101    (|| async move {
102        let mut last_version_dir = None;
103        let mut entries = fs::read_dir(&container_dir).await?;
104        while let Some(entry) = entries.next().await {
105            let entry = entry?;
106            if entry.file_type().await?.is_dir() {
107                last_version_dir = Some(entry.path());
108            }
109        }
110        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
111        let server_path = last_version_dir.join(SERVER_PATH);
112        if server_path.exists() {
113            Ok(LanguageServerBinary {
114                path: node.binary_path().await?,
115                arguments: server_binary_arguments(&server_path),
116            })
117        } else {
118            Err(anyhow!(
119                "missing executable in directory {:?}",
120                last_version_dir
121            ))
122        }
123    })()
124    .await
125    .log_err()
126}