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 language2::{LanguageServerName, LspAdapterDelegate};
7use lsp2::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 async 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 release =
34 latest_github_release("LuaLS/lua-language-server", false, delegate.http_client())
35 .await?;
36 let version = release.name.clone();
37 let platform = match consts::ARCH {
38 "x86_64" => "x64",
39 "aarch64" => "arm64",
40 other => bail!("Running on unsupported platform: {other}"),
41 };
42 let asset_name = format!("lua-language-server-{version}-darwin-{platform}.tar.gz");
43 let asset = release
44 .assets
45 .iter()
46 .find(|asset| asset.name == asset_name)
47 .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
48 let version = GitHubLspBinaryVersion {
49 name: release.name.clone(),
50 url: asset.browser_download_url.clone(),
51 };
52 Ok(Box::new(version) as Box<_>)
53 }
54
55 async fn fetch_server_binary(
56 &self,
57 version: Box<dyn 'static + Send + Any>,
58 container_dir: PathBuf,
59 delegate: &dyn LspAdapterDelegate,
60 ) -> Result<LanguageServerBinary> {
61 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
62
63 let binary_path = container_dir.join("bin/lua-language-server");
64
65 if fs::metadata(&binary_path).await.is_err() {
66 let mut response = delegate
67 .http_client()
68 .get(&version.url, Default::default(), true)
69 .await
70 .map_err(|err| anyhow!("error downloading release: {}", err))?;
71 let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
72 let archive = Archive::new(decompressed_bytes);
73 archive.unpack(container_dir).await?;
74 }
75
76 fs::set_permissions(
77 &binary_path,
78 <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
79 )
80 .await?;
81 Ok(LanguageServerBinary {
82 path: binary_path,
83 arguments: Vec::new(),
84 })
85 }
86
87 async fn cached_server_binary(
88 &self,
89 container_dir: PathBuf,
90 _: &dyn LspAdapterDelegate,
91 ) -> Option<LanguageServerBinary> {
92 get_cached_server_binary(container_dir).await
93 }
94
95 async fn installation_test_binary(
96 &self,
97 container_dir: PathBuf,
98 ) -> Option<LanguageServerBinary> {
99 get_cached_server_binary(container_dir)
100 .await
101 .map(|mut binary| {
102 binary.arguments = vec!["--version".into()];
103 binary
104 })
105 }
106}
107
108async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
109 async_maybe!({
110 let mut last_binary_path = None;
111 let mut entries = fs::read_dir(&container_dir).await?;
112 while let Some(entry) = entries.next().await {
113 let entry = entry?;
114 if entry.file_type().await?.is_file()
115 && entry
116 .file_name()
117 .to_str()
118 .map_or(false, |name| name == "lua-language-server")
119 {
120 last_binary_path = Some(entry.path());
121 }
122 }
123
124 if let Some(path) = last_binary_path {
125 Ok(LanguageServerBinary {
126 path,
127 arguments: Vec::new(),
128 })
129 } else {
130 Err(anyhow!("no cached binary"))
131 }
132 })
133 .await
134 .log_err()
135}