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::{LanguageServerBinary, LanguageServerName, LspAdapterDelegate};
7use smol::fs;
8use std::{any::Any, env::consts, ffi::OsString, path::PathBuf};
9use util::{
10 async_iife,
11 github::{latest_github_release, GitHubLspBinaryVersion},
12 ResultExt,
13};
14
15#[derive(Copy, Clone)]
16pub struct LuaLspAdapter;
17
18fn server_binary_arguments() -> Vec<OsString> {
19 vec![
20 "--logpath=~/lua-language-server.log".into(),
21 "--loglevel=trace".into(),
22 ]
23}
24
25#[async_trait]
26impl super::LspAdapter for LuaLspAdapter {
27 async fn name(&self) -> LanguageServerName {
28 LanguageServerName("lua-language-server".into())
29 }
30
31 async fn fetch_latest_server_version(
32 &self,
33 delegate: &dyn LspAdapterDelegate,
34 ) -> Result<Box<dyn 'static + Send + Any>> {
35 let release =
36 latest_github_release("LuaLS/lua-language-server", false, delegate.http_client())
37 .await?;
38 let version = release.name.clone();
39 let platform = match consts::ARCH {
40 "x86_64" => "x64",
41 "aarch64" => "arm64",
42 other => bail!("Running on unsupported platform: {other}"),
43 };
44 let asset_name = format!("lua-language-server-{version}-darwin-{platform}.tar.gz");
45 let asset = release
46 .assets
47 .iter()
48 .find(|asset| asset.name == asset_name)
49 .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
50 let version = GitHubLspBinaryVersion {
51 name: release.name.clone(),
52 url: asset.browser_download_url.clone(),
53 };
54 Ok(Box::new(version) as Box<_>)
55 }
56
57 async fn fetch_server_binary(
58 &self,
59 version: Box<dyn 'static + Send + Any>,
60 container_dir: PathBuf,
61 delegate: &dyn LspAdapterDelegate,
62 ) -> Result<LanguageServerBinary> {
63 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
64
65 let binary_path = container_dir.join("bin/lua-language-server");
66
67 if fs::metadata(&binary_path).await.is_err() {
68 let mut response = delegate
69 .http_client()
70 .get(&version.url, Default::default(), true)
71 .await
72 .map_err(|err| anyhow!("error downloading release: {}", err))?;
73 let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
74 let archive = Archive::new(decompressed_bytes);
75 archive.unpack(container_dir).await?;
76 }
77
78 fs::set_permissions(
79 &binary_path,
80 <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
81 )
82 .await?;
83 Ok(LanguageServerBinary {
84 path: binary_path,
85 arguments: server_binary_arguments(),
86 })
87 }
88
89 async fn cached_server_binary(
90 &self,
91 container_dir: PathBuf,
92 _: &dyn LspAdapterDelegate,
93 ) -> Option<LanguageServerBinary> {
94 async_iife!({
95 let mut last_binary_path = None;
96 let mut entries = fs::read_dir(&container_dir).await?;
97 while let Some(entry) = entries.next().await {
98 let entry = entry?;
99 if entry.file_type().await?.is_file()
100 && entry
101 .file_name()
102 .to_str()
103 .map_or(false, |name| name == "lua-language-server")
104 {
105 last_binary_path = Some(entry.path());
106 }
107 }
108
109 if let Some(path) = last_binary_path {
110 Ok(LanguageServerBinary {
111 path,
112 arguments: server_binary_arguments(),
113 })
114 } else {
115 Err(anyhow!("no cached binary"))
116 }
117 })
118 .await
119 .log_err()
120 }
121}