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 platform = match consts::ARCH {
34 "x86_64" => "x64",
35 "aarch64" => "arm64",
36 other => bail!("Running on unsupported platform: {other}"),
37 };
38 let release = latest_github_release(
39 "LuaLS/lua-language-server",
40 true,
41 false,
42 delegate.http_client(),
43 )
44 .await?;
45 let version = &release.name;
46 let asset_name = format!("lua-language-server-{version}-darwin-{platform}.tar.gz");
47 let asset = release
48 .assets
49 .iter()
50 .find(|asset| asset.name == asset_name)
51 .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
52 let version = GitHubLspBinaryVersion {
53 name: release.name,
54 url: asset.browser_download_url.clone(),
55 };
56 Ok(Box::new(version) as Box<_>)
57 }
58
59 async fn fetch_server_binary(
60 &self,
61 version: Box<dyn 'static + Send + Any>,
62 container_dir: PathBuf,
63 delegate: &dyn LspAdapterDelegate,
64 ) -> Result<LanguageServerBinary> {
65 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
66
67 let binary_path = container_dir.join("bin/lua-language-server");
68
69 if fs::metadata(&binary_path).await.is_err() {
70 let mut response = delegate
71 .http_client()
72 .get(&version.url, Default::default(), true)
73 .await
74 .map_err(|err| anyhow!("error downloading release: {}", err))?;
75 let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
76 let archive = Archive::new(decompressed_bytes);
77 archive.unpack(container_dir).await?;
78 }
79
80 fs::set_permissions(
81 &binary_path,
82 <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
83 )
84 .await?;
85 Ok(LanguageServerBinary {
86 path: binary_path,
87 arguments: Vec::new(),
88 })
89 }
90
91 async fn cached_server_binary(
92 &self,
93 container_dir: PathBuf,
94 _: &dyn LspAdapterDelegate,
95 ) -> Option<LanguageServerBinary> {
96 get_cached_server_binary(container_dir).await
97 }
98
99 async fn installation_test_binary(
100 &self,
101 container_dir: PathBuf,
102 ) -> Option<LanguageServerBinary> {
103 get_cached_server_binary(container_dir)
104 .await
105 .map(|mut binary| {
106 binary.arguments = vec!["--version".into()];
107 binary
108 })
109 }
110}
111
112async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
113 async_maybe!({
114 let mut last_binary_path = None;
115 let mut entries = fs::read_dir(&container_dir).await?;
116 while let Some(entry) = entries.next().await {
117 let entry = entry?;
118 if entry.file_type().await?.is_file()
119 && entry
120 .file_name()
121 .to_str()
122 .map_or(false, |name| name == "lua-language-server")
123 {
124 last_binary_path = Some(entry.path());
125 }
126 }
127
128 if let Some(path) = last_binary_path {
129 Ok(LanguageServerBinary {
130 path,
131 arguments: Vec::new(),
132 })
133 } else {
134 Err(anyhow!("no cached binary"))
135 }
136 })
137 .await
138 .log_err()
139}