1use std::{any::Any, env::consts, path::PathBuf, sync::Arc};
2
3use anyhow::{anyhow, bail, Result};
4use async_compression::futures::bufread::GzipDecoder;
5use async_tar::Archive;
6use async_trait::async_trait;
7use client::http::HttpClient;
8use futures::{io::BufReader, StreamExt};
9use language::LanguageServerName;
10use smol::fs;
11use util::{async_iife, ResultExt};
12
13use super::installation::{latest_github_release, GitHubLspBinaryVersion};
14
15#[derive(Copy, Clone)]
16pub struct LuaLspAdapter;
17
18#[async_trait]
19impl super::LspAdapter for LuaLspAdapter {
20 async fn name(&self) -> LanguageServerName {
21 LanguageServerName("lua-language-server".into())
22 }
23
24 async fn server_args(&self) -> Vec<String> {
25 vec![
26 "--logpath=~/lua-language-server.log".into(),
27 "--loglevel=trace".into(),
28 ]
29 }
30
31 async fn fetch_latest_server_version(
32 &self,
33 http: Arc<dyn HttpClient>,
34 ) -> Result<Box<dyn 'static + Send + Any>> {
35 let release = latest_github_release("LuaLS/lua-language-server", http).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 http: Arc<dyn HttpClient>,
59 container_dir: PathBuf,
60 ) -> Result<PathBuf> {
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 = http
67 .get(&version.url, Default::default(), true)
68 .await
69 .map_err(|err| anyhow!("error downloading release: {}", err))?;
70 let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
71 let archive = Archive::new(decompressed_bytes);
72 archive.unpack(container_dir).await?;
73 }
74
75 fs::set_permissions(
76 &binary_path,
77 <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
78 )
79 .await?;
80 Ok(binary_path)
81 }
82
83 async fn cached_server_binary(&self, container_dir: PathBuf) -> Option<PathBuf> {
84 async_iife!({
85 let mut last_binary_path = None;
86 let mut entries = fs::read_dir(&container_dir).await?;
87 while let Some(entry) = entries.next().await {
88 let entry = entry?;
89 if entry.file_type().await?.is_file()
90 && entry
91 .file_name()
92 .to_str()
93 .map_or(false, |name| name == "lua-language-server")
94 {
95 last_binary_path = Some(entry.path());
96 }
97 }
98
99 if let Some(path) = last_binary_path {
100 Ok(path)
101 } else {
102 Err(anyhow!("no cached binary"))
103 }
104 })
105 .await
106 .log_err()
107 }
108}