1use super::installation::{latest_github_release, GitHubLspBinaryVersion};
2use anyhow::{anyhow, Context, Result};
3use client::http::HttpClient;
4use futures::{future::BoxFuture, FutureExt, StreamExt};
5pub use language::*;
6use smol::fs::{self, File};
7use std::{any::Any, path::PathBuf, sync::Arc};
8use util::{ResultExt, TryFutureExt};
9
10pub struct CLspAdapter;
11
12impl super::LspAdapter for CLspAdapter {
13 fn name(&self) -> LanguageServerName {
14 LanguageServerName("clangd".into())
15 }
16
17 fn fetch_latest_server_version(
18 &self,
19 http: Arc<dyn HttpClient>,
20 ) -> BoxFuture<'static, Result<Box<dyn 'static + Send + Any>>> {
21 async move {
22 let release = latest_github_release("clangd/clangd", http).await?;
23 let asset_name = format!("clangd-mac-{}.zip", release.name);
24 let asset = release
25 .assets
26 .iter()
27 .find(|asset| asset.name == asset_name)
28 .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
29 let version = GitHubLspBinaryVersion {
30 name: release.name,
31 url: asset.browser_download_url.clone(),
32 };
33 Ok(Box::new(version) as Box<_>)
34 }
35 .boxed()
36 }
37
38 fn fetch_server_binary(
39 &self,
40 version: Box<dyn 'static + Send + Any>,
41 http: Arc<dyn HttpClient>,
42 container_dir: PathBuf,
43 ) -> BoxFuture<'static, Result<PathBuf>> {
44 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
45 async move {
46 let zip_path = container_dir.join(format!("clangd_{}.zip", version.name));
47 let version_dir = container_dir.join(format!("clangd_{}", version.name));
48 let binary_path = version_dir.join("bin/clangd");
49
50 if fs::metadata(&binary_path).await.is_err() {
51 let mut response = http
52 .get(&version.url, Default::default(), true)
53 .await
54 .context("error downloading release")?;
55 let mut file = File::create(&zip_path).await?;
56 if !response.status().is_success() {
57 Err(anyhow!(
58 "download failed with status {}",
59 response.status().to_string()
60 ))?;
61 }
62 futures::io::copy(response.body_mut(), &mut file).await?;
63
64 let unzip_status = smol::process::Command::new("unzip")
65 .current_dir(&container_dir)
66 .arg(&zip_path)
67 .output()
68 .await?
69 .status;
70 if !unzip_status.success() {
71 Err(anyhow!("failed to unzip clangd archive"))?;
72 }
73
74 if let Some(mut entries) = fs::read_dir(&container_dir).await.log_err() {
75 while let Some(entry) = entries.next().await {
76 if let Some(entry) = entry.log_err() {
77 let entry_path = entry.path();
78 if entry_path.as_path() != version_dir {
79 fs::remove_dir_all(&entry_path).await.log_err();
80 }
81 }
82 }
83 }
84 }
85
86 Ok(binary_path)
87 }
88 .boxed()
89 }
90
91 fn cached_server_binary(&self, container_dir: PathBuf) -> BoxFuture<'static, Option<PathBuf>> {
92 async move {
93 let mut last_clangd_dir = None;
94 let mut entries = fs::read_dir(&container_dir).await?;
95 while let Some(entry) = entries.next().await {
96 let entry = entry?;
97 if entry.file_type().await?.is_dir() {
98 last_clangd_dir = Some(entry.path());
99 }
100 }
101 let clangd_dir = last_clangd_dir.ok_or_else(|| anyhow!("no cached binary"))?;
102 let clangd_bin = clangd_dir.join("bin/clangd");
103 if clangd_bin.exists() {
104 Ok(clangd_bin)
105 } else {
106 Err(anyhow!(
107 "missing clangd binary in directory {:?}",
108 clangd_dir
109 ))
110 }
111 }
112 .log_err()
113 .boxed()
114 }
115
116 fn label_for_completion(
117 &self,
118 completion: &lsp::CompletionItem,
119 language: &Language,
120 ) -> Option<CodeLabel> {
121 let label = completion
122 .label
123 .strip_prefix("•")
124 .unwrap_or(&completion.label)
125 .trim();
126
127 match completion.kind {
128 Some(lsp::CompletionItemKind::FIELD) if completion.detail.is_some() => {
129 let detail = completion.detail.as_ref().unwrap();
130 let text = format!("{} {}", detail, label);
131 let source = Rope::from(format!("struct S {{ {} }}", text).as_str());
132 let runs = language.highlight_text(&source, 11..11 + text.len());
133 return Some(CodeLabel {
134 filter_range: detail.len() + 1..text.len(),
135 text,
136 runs,
137 });
138 }
139 Some(lsp::CompletionItemKind::CONSTANT | lsp::CompletionItemKind::VARIABLE)
140 if completion.detail.is_some() =>
141 {
142 let detail = completion.detail.as_ref().unwrap();
143 let text = format!("{} {}", detail, label);
144 let runs = language.highlight_text(&Rope::from(text.as_str()), 0..text.len());
145 return Some(CodeLabel {
146 filter_range: detail.len() + 1..text.len(),
147 text,
148 runs,
149 });
150 }
151 Some(lsp::CompletionItemKind::FUNCTION | lsp::CompletionItemKind::METHOD)
152 if completion.detail.is_some() =>
153 {
154 let detail = completion.detail.as_ref().unwrap();
155 let text = format!("{} {}", detail, label);
156 let runs = language.highlight_text(&Rope::from(text.as_str()), 0..text.len());
157 return Some(CodeLabel {
158 filter_range: detail.len() + 1..text.rfind('(').unwrap_or(text.len()),
159 text,
160 runs,
161 });
162 }
163 Some(kind) => {
164 let highlight_name = match kind {
165 lsp::CompletionItemKind::STRUCT
166 | lsp::CompletionItemKind::INTERFACE
167 | lsp::CompletionItemKind::CLASS
168 | lsp::CompletionItemKind::ENUM => Some("type"),
169 lsp::CompletionItemKind::ENUM_MEMBER => Some("variant"),
170 lsp::CompletionItemKind::KEYWORD => Some("keyword"),
171 lsp::CompletionItemKind::VALUE | lsp::CompletionItemKind::CONSTANT => {
172 Some("constant")
173 }
174 _ => None,
175 };
176 if let Some(highlight_id) = language
177 .grammar()
178 .and_then(|g| g.highlight_id_for_name(highlight_name?))
179 {
180 let mut label = CodeLabel::plain(label.to_string(), None);
181 label.runs.push((
182 0..label.text.rfind('(').unwrap_or(label.text.len()),
183 highlight_id,
184 ));
185 return Some(label);
186 }
187 }
188 _ => {}
189 }
190 Some(CodeLabel::plain(label.to_string(), None))
191 }
192
193 fn label_for_symbol(
194 &self,
195 name: &str,
196 kind: lsp::SymbolKind,
197 language: &Language,
198 ) -> Option<CodeLabel> {
199 let (text, filter_range, display_range) = match kind {
200 lsp::SymbolKind::METHOD | lsp::SymbolKind::FUNCTION => {
201 let text = format!("void {} () {{}}", name);
202 let filter_range = 0..name.len();
203 let display_range = 5..5 + name.len();
204 (text, filter_range, display_range)
205 }
206 lsp::SymbolKind::STRUCT => {
207 let text = format!("struct {} {{}}", name);
208 let filter_range = 7..7 + name.len();
209 let display_range = 0..filter_range.end;
210 (text, filter_range, display_range)
211 }
212 lsp::SymbolKind::ENUM => {
213 let text = format!("enum {} {{}}", name);
214 let filter_range = 5..5 + name.len();
215 let display_range = 0..filter_range.end;
216 (text, filter_range, display_range)
217 }
218 lsp::SymbolKind::INTERFACE | lsp::SymbolKind::CLASS => {
219 let text = format!("class {} {{}}", name);
220 let filter_range = 6..6 + name.len();
221 let display_range = 0..filter_range.end;
222 (text, filter_range, display_range)
223 }
224 lsp::SymbolKind::CONSTANT => {
225 let text = format!("const int {} = 0;", name);
226 let filter_range = 10..10 + name.len();
227 let display_range = 0..filter_range.end;
228 (text, filter_range, display_range)
229 }
230 lsp::SymbolKind::MODULE => {
231 let text = format!("namespace {} {{}}", name);
232 let filter_range = 10..10 + name.len();
233 let display_range = 0..filter_range.end;
234 (text, filter_range, display_range)
235 }
236 lsp::SymbolKind::TYPE_PARAMETER => {
237 let text = format!("typename {} {{}};", name);
238 let filter_range = 9..9 + name.len();
239 let display_range = 0..filter_range.end;
240 (text, filter_range, display_range)
241 }
242 _ => return None,
243 };
244
245 Some(CodeLabel {
246 runs: language.highlight_text(&text.as_str().into(), display_range.clone()),
247 text: text[display_range].to_string(),
248 filter_range,
249 })
250 }
251}