1use anyhow::{anyhow, bail, Result};
2use async_compression::futures::bufread::GzipDecoder;
3use async_tar::Archive;
4use async_trait::async_trait;
5use futures::{io::BufReader, StreamExt};
6use language::{LanguageServerName, LspAdapterDelegate};
7use lsp::LanguageServerBinary;
8use smol::fs;
9use std::{any::Any, env::consts, path::PathBuf};
10use util::{
11 async_maybe,
12 github::{latest_github_release, GitHubLspBinaryVersion},
13 ResultExt,
14};
15
16#[derive(Copy, Clone)]
17pub struct LuaLspAdapter;
18
19#[async_trait]
20impl super::LspAdapter for LuaLspAdapter {
21 fn name(&self) -> LanguageServerName {
22 LanguageServerName("lua-language-server".into())
23 }
24
25 fn short_name(&self) -> &'static str {
26 "lua"
27 }
28
29 async fn fetch_latest_server_version(
30 &self,
31 delegate: &dyn LspAdapterDelegate,
32 ) -> Result<Box<dyn 'static + Send + Any>> {
33 let os = match consts::OS {
34 "macos" => "darwin",
35 "linux" => "linux",
36 "windows" => "win32",
37 other => bail!("Running on unsupported os: {other}"),
38 };
39 let platform = match consts::ARCH {
40 "x86_64" => "x64",
41 "aarch64" => "arm64",
42 other => bail!("Running on unsupported platform: {other}"),
43 };
44 let release = latest_github_release(
45 "LuaLS/lua-language-server",
46 true,
47 false,
48 delegate.http_client(),
49 )
50 .await?;
51 let version = &release.tag_name;
52 let asset_name = format!("lua-language-server-{version}-{os}-{platform}.tar.gz");
53 let asset = release
54 .assets
55 .iter()
56 .find(|asset| asset.name == asset_name)
57 .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
58 let version = GitHubLspBinaryVersion {
59 name: release.tag_name,
60 url: asset.browser_download_url.clone(),
61 };
62 Ok(Box::new(version) as Box<_>)
63 }
64
65 async fn fetch_server_binary(
66 &self,
67 version: Box<dyn 'static + Send + Any>,
68 container_dir: PathBuf,
69 delegate: &dyn LspAdapterDelegate,
70 ) -> Result<LanguageServerBinary> {
71 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
72
73 let binary_path = container_dir.join("bin/lua-language-server");
74
75 if fs::metadata(&binary_path).await.is_err() {
76 let mut response = delegate
77 .http_client()
78 .get(&version.url, Default::default(), true)
79 .await
80 .map_err(|err| anyhow!("error downloading release: {}", err))?;
81 let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
82 let archive = Archive::new(decompressed_bytes);
83 archive.unpack(container_dir).await?;
84 }
85
86 // todo!("windows")
87 #[cfg(not(windows))]
88 {
89 fs::set_permissions(
90 &binary_path,
91 <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
92 )
93 .await?;
94 }
95 Ok(LanguageServerBinary {
96 path: binary_path,
97 env: None,
98 arguments: Vec::new(),
99 })
100 }
101
102 async fn cached_server_binary(
103 &self,
104 container_dir: PathBuf,
105 _: &dyn LspAdapterDelegate,
106 ) -> Option<LanguageServerBinary> {
107 get_cached_server_binary(container_dir).await
108 }
109
110 async fn installation_test_binary(
111 &self,
112 container_dir: PathBuf,
113 ) -> Option<LanguageServerBinary> {
114 get_cached_server_binary(container_dir)
115 .await
116 .map(|mut binary| {
117 binary.arguments = vec!["--version".into()];
118 binary
119 })
120 }
121}
122
123async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
124 async_maybe!({
125 let mut last_binary_path = None;
126 let mut entries = fs::read_dir(&container_dir).await?;
127 while let Some(entry) = entries.next().await {
128 let entry = entry?;
129 if entry.file_type().await?.is_file()
130 && entry
131 .file_name()
132 .to_str()
133 .map_or(false, |name| name == "lua-language-server")
134 {
135 last_binary_path = Some(entry.path());
136 }
137 }
138
139 if let Some(path) = last_binary_path {
140 Ok(LanguageServerBinary {
141 path,
142 env: None,
143 arguments: Vec::new(),
144 })
145 } else {
146 Err(anyhow!("no cached binary"))
147 }
148 })
149 .await
150 .log_err()
151}