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::{async_maybe, ResultExt};
16
17const SERVER_PATH: &str = "node_modules/svelte-language-server/bin/server.js";
18
19fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
20 vec![server_path.into(), "--stdio".into()]
21}
22
23pub struct SvelteLspAdapter {
24 node: Arc<dyn NodeRuntime>,
25}
26
27impl SvelteLspAdapter {
28 pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
29 SvelteLspAdapter { node }
30 }
31}
32
33#[async_trait]
34impl LspAdapter for SvelteLspAdapter {
35 fn name(&self) -> LanguageServerName {
36 LanguageServerName("svelte-language-server".into())
37 }
38
39 async fn fetch_latest_server_version(
40 &self,
41 _: &dyn LspAdapterDelegate,
42 ) -> Result<Box<dyn 'static + Any + Send>> {
43 Ok(Box::new(
44 self.node
45 .npm_package_latest_version("svelte-language-server")
46 .await?,
47 ) as Box<_>)
48 }
49
50 async fn fetch_server_binary(
51 &self,
52 version: Box<dyn 'static + Send + Any>,
53 container_dir: PathBuf,
54 _: &dyn LspAdapterDelegate,
55 ) -> Result<LanguageServerBinary> {
56 let version = version.downcast::<String>().unwrap();
57 let server_path = container_dir.join(SERVER_PATH);
58
59 if fs::metadata(&server_path).await.is_err() {
60 self.node
61 .npm_install_packages(
62 &container_dir,
63 &[("svelte-language-server", version.as_str())],
64 )
65 .await?;
66 }
67
68 Ok(LanguageServerBinary {
69 path: self.node.binary_path().await?,
70 env: None,
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 fn initialization_options(&self) -> Option<serde_json::Value> {
91 let config = json!({
92 "inlayHints": {
93 "parameterNames": {
94 "enabled": "all",
95 "suppressWhenArgumentMatchesName": false
96 },
97 "parameterTypes": {
98 "enabled": true
99 },
100 "variableTypes": {
101 "enabled": true,
102 "suppressWhenTypeMatchesName": false
103 },
104 "propertyDeclarationTypes": {
105 "enabled": true
106 },
107 "functionLikeReturnType": {
108 "enabled": true
109 },
110 "enumMemberValues": {
111 "enabled": true
112 }
113 }
114 });
115
116 Some(json!({
117 "provideFormatter": true,
118 "configuration": {
119 "typescript": config,
120 "javascript": config
121 }
122 }))
123 }
124
125 fn prettier_plugins(&self) -> &[&'static str] {
126 &["prettier-plugin-svelte"]
127 }
128}
129
130async fn get_cached_server_binary(
131 container_dir: PathBuf,
132 node: &dyn NodeRuntime,
133) -> Option<LanguageServerBinary> {
134 async_maybe!({
135 let mut last_version_dir = None;
136 let mut entries = fs::read_dir(&container_dir).await?;
137 while let Some(entry) = entries.next().await {
138 let entry = entry?;
139 if entry.file_type().await?.is_dir() {
140 last_version_dir = Some(entry.path());
141 }
142 }
143 let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
144 let server_path = last_version_dir.join(SERVER_PATH);
145 if server_path.exists() {
146 Ok(LanguageServerBinary {
147 path: node.binary_path().await?,
148 env: None,
149 arguments: server_binary_arguments(&server_path),
150 })
151 } else {
152 Err(anyhow!(
153 "missing executable in directory {:?}",
154 last_version_dir
155 ))
156 }
157 })
158 .await
159 .log_err()
160}