1use anyhow::{anyhow, Result};
2use async_trait::async_trait;
3use collections::HashMap;
4use futures::StreamExt;
5use gpui::AsyncAppContext;
6use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};
7use lsp::LanguageServerBinary;
8use node_runtime::NodeRuntime;
9use project::project_settings::ProjectSettings;
10use serde_json::{json, Value};
11use settings::Settings;
12use smol::fs;
13use std::{
14 any::Any,
15 ffi::OsString,
16 path::{Path, PathBuf},
17 sync::Arc,
18};
19use util::{maybe, ResultExt};
20
21const SERVER_PATH: &str = "node_modules/.bin/tailwindcss-language-server";
22
23fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
24 vec![server_path.into(), "--stdio".into()]
25}
26
27pub struct TailwindLspAdapter {
28 node: Arc<dyn NodeRuntime>,
29}
30
31impl TailwindLspAdapter {
32 const SERVER_NAME: &'static str = "tailwindcss-language-server";
33
34 pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
35 TailwindLspAdapter { node }
36 }
37}
38
39#[async_trait(?Send)]
40impl LspAdapter for TailwindLspAdapter {
41 fn name(&self) -> LanguageServerName {
42 LanguageServerName(Self::SERVER_NAME.into())
43 }
44
45 async fn check_if_user_installed(
46 &self,
47 _delegate: &dyn LspAdapterDelegate,
48 cx: &AsyncAppContext,
49 ) -> Option<LanguageServerBinary> {
50 let configured_binary = cx
51 .update(|cx| {
52 ProjectSettings::get_global(cx)
53 .lsp
54 .get(Self::SERVER_NAME)
55 .and_then(|s| s.binary.clone())
56 })
57 .ok()??;
58
59 let path = if let Some(configured_path) = configured_binary.path.map(PathBuf::from) {
60 configured_path
61 } else {
62 self.node.binary_path().await.ok()?
63 };
64
65 let arguments = configured_binary
66 .arguments
67 .unwrap_or_default()
68 .iter()
69 .map(|arg| arg.into())
70 .collect();
71
72 Some(LanguageServerBinary {
73 path,
74 arguments,
75 env: None,
76 })
77 }
78
79 async fn fetch_latest_server_version(
80 &self,
81 _: &dyn LspAdapterDelegate,
82 ) -> Result<Box<dyn 'static + Any + Send>> {
83 Ok(Box::new(
84 self.node
85 .npm_package_latest_version("@tailwindcss/language-server")
86 .await?,
87 ) as Box<_>)
88 }
89
90 async fn fetch_server_binary(
91 &self,
92 latest_version: Box<dyn 'static + Send + Any>,
93 container_dir: PathBuf,
94 _: &dyn LspAdapterDelegate,
95 ) -> Result<LanguageServerBinary> {
96 let latest_version = latest_version.downcast::<String>().unwrap();
97 let server_path = container_dir.join(SERVER_PATH);
98 let package_name = "@tailwindcss/language-server";
99
100 let should_install_language_server = self
101 .node
102 .should_install_npm_package(package_name, &server_path, &container_dir, &latest_version)
103 .await;
104
105 if should_install_language_server {
106 self.node
107 .npm_install_packages(&container_dir, &[(package_name, latest_version.as_str())])
108 .await?;
109 }
110
111 Ok(LanguageServerBinary {
112 path: self.node.binary_path().await?,
113 env: None,
114 arguments: server_binary_arguments(&server_path),
115 })
116 }
117
118 async fn cached_server_binary(
119 &self,
120 container_dir: PathBuf,
121 _: &dyn LspAdapterDelegate,
122 ) -> Option<LanguageServerBinary> {
123 get_cached_server_binary(container_dir, &*self.node).await
124 }
125
126 async fn installation_test_binary(
127 &self,
128 container_dir: PathBuf,
129 ) -> Option<LanguageServerBinary> {
130 get_cached_server_binary(container_dir, &*self.node).await
131 }
132
133 async fn initialization_options(
134 self: Arc<Self>,
135 _: &Arc<dyn LspAdapterDelegate>,
136 ) -> Result<Option<serde_json::Value>> {
137 Ok(Some(json!({
138 "provideFormatter": true,
139 "userLanguages": {
140 "html": "html",
141 "css": "css",
142 "javascript": "javascript",
143 "typescriptreact": "typescriptreact",
144 },
145 })))
146 }
147
148 async fn workspace_configuration(
149 self: Arc<Self>,
150 _: &Arc<dyn LspAdapterDelegate>,
151 cx: &mut AsyncAppContext,
152 ) -> Result<Value> {
153 let tailwind_user_settings = cx.update(|cx| {
154 ProjectSettings::get_global(cx)
155 .lsp
156 .get(Self::SERVER_NAME)
157 .and_then(|s| s.settings.clone())
158 .unwrap_or_default()
159 })?;
160
161 // We need to set this to null if it's not set, because tailwindcss-languageserver
162 // will check whether it's an object and if it is (even if it's empty) it will
163 // ignore the `userLanguages` from the initialization options.
164 let include_languages = tailwind_user_settings
165 .get("includeLanguages")
166 .cloned()
167 .unwrap_or(Value::Null);
168
169 let experimental = tailwind_user_settings
170 .get("experimental")
171 .cloned()
172 .unwrap_or_else(|| json!([]));
173
174 Ok(json!({
175 "tailwindCSS": {
176 "emmetCompletions": true,
177 "includeLanguages": include_languages,
178 "experimental": experimental,
179 }
180 }))
181 }
182
183 fn language_ids(&self) -> HashMap<String, String> {
184 HashMap::from_iter([
185 ("Astro".to_string(), "astro".to_string()),
186 ("HTML".to_string(), "html".to_string()),
187 ("CSS".to_string(), "css".to_string()),
188 ("JavaScript".to_string(), "javascript".to_string()),
189 ("TSX".to_string(), "typescriptreact".to_string()),
190 ("Svelte".to_string(), "svelte".to_string()),
191 ("Elixir".to_string(), "phoenix-heex".to_string()),
192 ("HEEX".to_string(), "phoenix-heex".to_string()),
193 ("ERB".to_string(), "erb".to_string()),
194 ("PHP".to_string(), "php".to_string()),
195 ("Vue.js".to_string(), "vue".to_string()),
196 ])
197 }
198}
199
200async fn get_cached_server_binary(
201 container_dir: PathBuf,
202 node: &dyn NodeRuntime,
203) -> Option<LanguageServerBinary> {
204 maybe!(async {
205 let mut last_version_dir = None;
206 let mut entries = fs::read_dir(&container_dir).await?;
207 while let Some(entry) = entries.next().await {
208 let entry = entry?;
209 if entry.file_type().await?.is_dir() {
210 last_version_dir = Some(entry.path());
211 }
212 }
213 let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
214 let server_path = last_version_dir.join(SERVER_PATH);
215 if server_path.exists() {
216 Ok(LanguageServerBinary {
217 path: node.binary_path().await?,
218 env: None,
219 arguments: server_binary_arguments(&server_path),
220 })
221 } else {
222 Err(anyhow!(
223 "missing executable in directory {:?}",
224 last_version_dir
225 ))
226 }
227 })
228 .await
229 .log_err()
230}