1use anyhow::Result;
2use async_trait::async_trait;
3use gpui::AsyncApp;
4use language::{LspAdapter, LspAdapterDelegate, LspInstaller, Toolchain};
5use lsp::{LanguageServerBinary, LanguageServerName, Uri};
6use node_runtime::{NodeRuntime, VersionStrategy};
7use project::lsp_store::language_server_settings;
8use serde_json::json;
9use std::{
10 ffi::OsString,
11 path::{Path, PathBuf},
12 sync::Arc,
13};
14use util::{ResultExt, maybe, merge_json_value_into};
15
16const SERVER_PATH: &str = "node_modules/@tailwindcss/language-server/bin/css-language-server";
17
18fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
19 vec![server_path.into(), "--stdio".into()]
20}
21
22pub struct TailwindCssLspAdapter {
23 node: NodeRuntime,
24}
25
26// Implements the LSP adapter for the Tailwind CSS LSP fork: https://github.com/zed-industries/zed/pull/39517#issuecomment-3368206678
27impl TailwindCssLspAdapter {
28 const SERVER_NAME: LanguageServerName =
29 LanguageServerName::new_static("tailwindcss-intellisense-css");
30 const PACKAGE_NAME: &str = "@tailwindcss/language-server";
31
32 pub fn new(node: NodeRuntime) -> Self {
33 TailwindCssLspAdapter { node }
34 }
35}
36
37impl LspInstaller for TailwindCssLspAdapter {
38 type BinaryVersion = String;
39
40 async fn fetch_latest_server_version(
41 &self,
42 _: &dyn LspAdapterDelegate,
43 _: bool,
44 _: &mut AsyncApp,
45 ) -> Result<String> {
46 self.node
47 .npm_package_latest_version(Self::PACKAGE_NAME)
48 .await
49 }
50
51 async fn check_if_user_installed(
52 &self,
53 delegate: &dyn LspAdapterDelegate,
54 _: Option<Toolchain>,
55 _: &AsyncApp,
56 ) -> Option<LanguageServerBinary> {
57 let path = delegate.which(Self::SERVER_NAME.as_ref()).await?;
58 let env = delegate.shell_env().await;
59
60 Some(LanguageServerBinary {
61 path,
62 env: Some(env),
63 arguments: vec!["--stdio".into()],
64 })
65 }
66
67 async fn fetch_server_binary(
68 &self,
69 latest_version: String,
70 container_dir: PathBuf,
71 _: &dyn LspAdapterDelegate,
72 ) -> Result<LanguageServerBinary> {
73 let server_path = container_dir.join(SERVER_PATH);
74
75 self.node
76 .npm_install_packages(
77 &container_dir,
78 &[(Self::PACKAGE_NAME, latest_version.as_str())],
79 )
80 .await?;
81
82 Ok(LanguageServerBinary {
83 path: self.node.binary_path().await?,
84 env: None,
85 arguments: server_binary_arguments(&server_path),
86 })
87 }
88
89 async fn check_if_version_installed(
90 &self,
91 version: &String,
92 container_dir: &PathBuf,
93 _: &dyn LspAdapterDelegate,
94 ) -> Option<LanguageServerBinary> {
95 let server_path = container_dir.join(SERVER_PATH);
96
97 let should_install_language_server = self
98 .node
99 .should_install_npm_package(
100 Self::PACKAGE_NAME,
101 &server_path,
102 container_dir,
103 VersionStrategy::Latest(version),
104 )
105 .await;
106
107 if should_install_language_server {
108 None
109 } else {
110 Some(LanguageServerBinary {
111 path: self.node.binary_path().await.ok()?,
112 env: None,
113 arguments: server_binary_arguments(&server_path),
114 })
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
127#[async_trait(?Send)]
128impl LspAdapter for TailwindCssLspAdapter {
129 fn name(&self) -> LanguageServerName {
130 Self::SERVER_NAME
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 })))
140 }
141
142 async fn workspace_configuration(
143 self: Arc<Self>,
144 delegate: &Arc<dyn LspAdapterDelegate>,
145 _: Option<Toolchain>,
146 _: Option<Uri>,
147 cx: &mut AsyncApp,
148 ) -> Result<serde_json::Value> {
149 let mut default_config = json!({
150 "css": {
151 "lint": {}
152 },
153 "less": {
154 "lint": {}
155 },
156 "scss": {
157 "lint": {}
158 }
159 });
160
161 let project_options = cx.update(|cx| {
162 language_server_settings(delegate.as_ref(), &self.name(), cx)
163 .and_then(|s| s.settings.clone())
164 })?;
165
166 if let Some(override_options) = project_options {
167 merge_json_value_into(override_options, &mut default_config);
168 }
169
170 Ok(default_config)
171 }
172}
173
174async fn get_cached_server_binary(
175 container_dir: PathBuf,
176 node: &NodeRuntime,
177) -> Option<LanguageServerBinary> {
178 maybe!(async {
179 let server_path = container_dir.join(SERVER_PATH);
180 anyhow::ensure!(
181 server_path.exists(),
182 "missing executable in directory {server_path:?}"
183 );
184 Ok(LanguageServerBinary {
185 path: node.binary_path().await?,
186 env: None,
187 arguments: server_binary_arguments(&server_path),
188 })
189 })
190 .await
191 .log_err()
192}