1use anyhow::{anyhow, Result};
  2use async_trait::async_trait;
  3use futures::StreamExt;
  4use gpui::AsyncAppContext;
  5use language::{
  6    language_settings::AllLanguageSettings, LanguageServerName, LspAdapter, LspAdapterDelegate,
  7};
  8use lsp::LanguageServerBinary;
  9use node_runtime::NodeRuntime;
 10use project::lsp_store::language_server_settings;
 11use serde_json::Value;
 12use settings::{Settings, SettingsLocation};
 13use smol::fs;
 14use std::{
 15    any::Any,
 16    ffi::OsString,
 17    path::{Path, PathBuf},
 18    sync::Arc,
 19};
 20use util::{maybe, merge_json_value_into, ResultExt};
 21
 22const SERVER_PATH: &str = "node_modules/yaml-language-server/bin/yaml-language-server";
 23
 24fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 25    vec![server_path.into(), "--stdio".into()]
 26}
 27
 28pub struct YamlLspAdapter {
 29    node: NodeRuntime,
 30}
 31
 32impl YamlLspAdapter {
 33    const SERVER_NAME: LanguageServerName = LanguageServerName::new_static("yaml-language-server");
 34    pub fn new(node: NodeRuntime) -> Self {
 35        YamlLspAdapter { node }
 36    }
 37}
 38
 39#[async_trait(?Send)]
 40impl LspAdapter for YamlLspAdapter {
 41    fn name(&self) -> LanguageServerName {
 42        Self::SERVER_NAME.clone()
 43    }
 44
 45    async fn fetch_latest_server_version(
 46        &self,
 47        _: &dyn LspAdapterDelegate,
 48    ) -> Result<Box<dyn 'static + Any + Send>> {
 49        Ok(Box::new(
 50            self.node
 51                .npm_package_latest_version("yaml-language-server")
 52                .await?,
 53        ) as Box<_>)
 54    }
 55
 56    async fn fetch_server_binary(
 57        &self,
 58        latest_version: Box<dyn 'static + Send + Any>,
 59        container_dir: PathBuf,
 60        _: &dyn LspAdapterDelegate,
 61    ) -> Result<LanguageServerBinary> {
 62        let latest_version = latest_version.downcast::<String>().unwrap();
 63        let server_path = container_dir.join(SERVER_PATH);
 64        let package_name = "yaml-language-server";
 65
 66        let should_install_language_server = self
 67            .node
 68            .should_install_npm_package(package_name, &server_path, &container_dir, &latest_version)
 69            .await;
 70
 71        if should_install_language_server {
 72            self.node
 73                .npm_install_packages(&container_dir, &[(package_name, latest_version.as_str())])
 74                .await?;
 75        }
 76
 77        Ok(LanguageServerBinary {
 78            path: self.node.binary_path().await?,
 79            env: None,
 80            arguments: server_binary_arguments(&server_path),
 81        })
 82    }
 83
 84    async fn cached_server_binary(
 85        &self,
 86        container_dir: PathBuf,
 87        _: &dyn LspAdapterDelegate,
 88    ) -> Option<LanguageServerBinary> {
 89        get_cached_server_binary(container_dir, &self.node).await
 90    }
 91
 92    async fn workspace_configuration(
 93        self: Arc<Self>,
 94        delegate: &Arc<dyn LspAdapterDelegate>,
 95        cx: &mut AsyncAppContext,
 96    ) -> Result<Value> {
 97        let location = SettingsLocation {
 98            worktree_id: delegate.worktree_id(),
 99            path: delegate.worktree_root_path(),
100        };
101
102        let tab_size = cx.update(|cx| {
103            AllLanguageSettings::get(Some(location), cx)
104                .language(Some(&"YAML".into()))
105                .tab_size
106        })?;
107        let mut options = serde_json::json!({"[yaml]": {"editor.tabSize": tab_size}});
108
109        let project_options = cx.update(|cx| {
110            language_server_settings(delegate.as_ref(), &Self::SERVER_NAME, cx)
111                .and_then(|s| s.settings.clone())
112        })?;
113        if let Some(override_options) = project_options {
114            merge_json_value_into(override_options, &mut options);
115        }
116        Ok(options)
117    }
118}
119
120async fn get_cached_server_binary(
121    container_dir: PathBuf,
122    node: &NodeRuntime,
123) -> Option<LanguageServerBinary> {
124    maybe!(async {
125        let mut last_version_dir = None;
126        let mut entries = fs::read_dir(&container_dir).await?;
127        while let Some(entry) = entries.next().await {
128            let entry = entry?;
129            if entry.file_type().await?.is_dir() {
130                last_version_dir = Some(entry.path());
131            }
132        }
133        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
134        let server_path = last_version_dir.join(SERVER_PATH);
135        if server_path.exists() {
136            Ok(LanguageServerBinary {
137                path: node.binary_path().await?,
138                env: None,
139                arguments: server_binary_arguments(&server_path),
140            })
141        } else {
142            Err(anyhow!(
143                "missing executable in directory {:?}",
144                last_version_dir
145            ))
146        }
147    })
148    .await
149    .log_err()
150}