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