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 semver::Version;
9use serde_json::json;
10use std::{
11 ffi::OsString,
12 path::{Path, PathBuf},
13 sync::Arc,
14};
15use util::{ResultExt, maybe, merge_json_value_into};
16
17const SERVER_PATH: &str = "node_modules/@tailwindcss/language-server/bin/css-language-server";
18
19fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
20 vec![server_path.into(), "--stdio".into()]
21}
22
23pub struct TailwindCssLspAdapter {
24 node: NodeRuntime,
25}
26
27// Implements the LSP adapter for the Tailwind CSS LSP fork: https://github.com/zed-industries/zed/pull/39517#issuecomment-3368206678
28impl TailwindCssLspAdapter {
29 const SERVER_NAME: LanguageServerName =
30 LanguageServerName::new_static("tailwindcss-intellisense-css");
31 const PACKAGE_NAME: &str = "@tailwindcss/language-server";
32
33 pub fn new(node: NodeRuntime) -> Self {
34 TailwindCssLspAdapter { node }
35 }
36}
37
38impl LspInstaller for TailwindCssLspAdapter {
39 type BinaryVersion = Version;
40
41 async fn fetch_latest_server_version(
42 &self,
43 _: &dyn LspAdapterDelegate,
44 _: bool,
45 _: &mut AsyncApp,
46 ) -> Result<Self::BinaryVersion> {
47 self.node
48 .npm_package_latest_version(Self::PACKAGE_NAME)
49 .await
50 }
51
52 async fn check_if_user_installed(
53 &self,
54 delegate: &dyn LspAdapterDelegate,
55 _: Option<Toolchain>,
56 _: &AsyncApp,
57 ) -> Option<LanguageServerBinary> {
58 let path = delegate.which(Self::SERVER_NAME.as_ref()).await?;
59 let env = delegate.shell_env().await;
60
61 Some(LanguageServerBinary {
62 path,
63 env: Some(env),
64 arguments: vec!["--stdio".into()],
65 })
66 }
67
68 async fn fetch_server_binary(
69 &self,
70 latest_version: Self::BinaryVersion,
71 container_dir: PathBuf,
72 _: &dyn LspAdapterDelegate,
73 ) -> Result<LanguageServerBinary> {
74 let server_path = container_dir.join(SERVER_PATH);
75 let latest_version = latest_version.to_string();
76
77 self.node
78 .npm_install_packages(
79 &container_dir,
80 &[(Self::PACKAGE_NAME, latest_version.as_str())],
81 )
82 .await?;
83
84 Ok(LanguageServerBinary {
85 path: self.node.binary_path().await?,
86 env: None,
87 arguments: server_binary_arguments(&server_path),
88 })
89 }
90
91 async fn check_if_version_installed(
92 &self,
93 version: &Self::BinaryVersion,
94 container_dir: &PathBuf,
95 _: &dyn LspAdapterDelegate,
96 ) -> Option<LanguageServerBinary> {
97 let server_path = container_dir.join(SERVER_PATH);
98
99 let should_install_language_server = self
100 .node
101 .should_install_npm_package(
102 Self::PACKAGE_NAME,
103 &server_path,
104 container_dir,
105 VersionStrategy::Latest(version),
106 )
107 .await;
108
109 if should_install_language_server {
110 None
111 } else {
112 Some(LanguageServerBinary {
113 path: self.node.binary_path().await.ok()?,
114 env: None,
115 arguments: server_binary_arguments(&server_path),
116 })
117 }
118 }
119
120 async fn cached_server_binary(
121 &self,
122 container_dir: PathBuf,
123 _: &dyn LspAdapterDelegate,
124 ) -> Option<LanguageServerBinary> {
125 get_cached_server_binary(container_dir, &self.node).await
126 }
127}
128
129#[async_trait(?Send)]
130impl LspAdapter for TailwindCssLspAdapter {
131 fn name(&self) -> LanguageServerName {
132 Self::SERVER_NAME
133 }
134
135 async fn initialization_options(
136 self: Arc<Self>,
137 _: &Arc<dyn LspAdapterDelegate>,
138 ) -> Result<Option<serde_json::Value>> {
139 Ok(Some(json!({
140 "provideFormatter": true
141 })))
142 }
143
144 async fn workspace_configuration(
145 self: Arc<Self>,
146 delegate: &Arc<dyn LspAdapterDelegate>,
147 _: Option<Toolchain>,
148 _: Option<Uri>,
149 cx: &mut AsyncApp,
150 ) -> Result<serde_json::Value> {
151 let mut default_config = json!({
152 "css": {
153 "lint": {}
154 },
155 "less": {
156 "lint": {}
157 },
158 "scss": {
159 "lint": {}
160 }
161 });
162
163 let project_options = cx.update(|cx| {
164 language_server_settings(delegate.as_ref(), &self.name(), cx)
165 .and_then(|s| s.settings.clone())
166 })?;
167
168 if let Some(override_options) = project_options {
169 merge_json_value_into(override_options, &mut default_config);
170 }
171
172 Ok(default_config)
173 }
174}
175
176async fn get_cached_server_binary(
177 container_dir: PathBuf,
178 node: &NodeRuntime,
179) -> Option<LanguageServerBinary> {
180 maybe!(async {
181 let server_path = container_dir.join(SERVER_PATH);
182 anyhow::ensure!(
183 server_path.exists(),
184 "missing executable in directory {server_path:?}"
185 );
186 Ok(LanguageServerBinary {
187 path: node.binary_path().await?,
188 env: None,
189 arguments: server_binary_arguments(&server_path),
190 })
191 })
192 .await
193 .log_err()
194}