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, ffi::OsString, path::PathBuf};
10use util::{
11 async_iife,
12 github::{latest_github_release, GitHubLspBinaryVersion},
13 ResultExt,
14};
15
16#[derive(Copy, Clone)]
17pub struct LuaLspAdapter;
18
19fn server_binary_arguments() -> Vec<OsString> {
20 vec![
21 "--logpath=~/lua-language-server.log".into(),
22 "--loglevel=trace".into(),
23 ]
24}
25
26#[async_trait]
27impl super::LspAdapter for LuaLspAdapter {
28 async fn name(&self) -> LanguageServerName {
29 LanguageServerName("lua-language-server".into())
30 }
31
32 async fn fetch_latest_server_version(
33 &self,
34 delegate: &dyn LspAdapterDelegate,
35 ) -> Result<Box<dyn 'static + Send + Any>> {
36 let release =
37 latest_github_release("LuaLS/lua-language-server", false, delegate.http_client())
38 .await?;
39 let version = release.name.clone();
40 let platform = match consts::ARCH {
41 "x86_64" => "x64",
42 "aarch64" => "arm64",
43 other => bail!("Running on unsupported platform: {other}"),
44 };
45 let asset_name = format!("lua-language-server-{version}-darwin-{platform}.tar.gz");
46 let asset = release
47 .assets
48 .iter()
49 .find(|asset| asset.name == asset_name)
50 .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
51 let version = GitHubLspBinaryVersion {
52 name: release.name.clone(),
53 url: asset.browser_download_url.clone(),
54 };
55 Ok(Box::new(version) as Box<_>)
56 }
57
58 async fn fetch_server_binary(
59 &self,
60 version: Box<dyn 'static + Send + Any>,
61 container_dir: PathBuf,
62 delegate: &dyn LspAdapterDelegate,
63 ) -> Result<LanguageServerBinary> {
64 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
65
66 let binary_path = container_dir.join("bin/lua-language-server");
67
68 if fs::metadata(&binary_path).await.is_err() {
69 let mut response = delegate
70 .http_client()
71 .get(&version.url, Default::default(), true)
72 .await
73 .map_err(|err| anyhow!("error downloading release: {}", err))?;
74 let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
75 let archive = Archive::new(decompressed_bytes);
76 archive.unpack(container_dir).await?;
77 }
78
79 fs::set_permissions(
80 &binary_path,
81 <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
82 )
83 .await?;
84 Ok(LanguageServerBinary {
85 path: binary_path,
86 arguments: server_binary_arguments(),
87 })
88 }
89
90 async fn cached_server_binary(
91 &self,
92 container_dir: PathBuf,
93 _: &dyn LspAdapterDelegate,
94 ) -> Option<LanguageServerBinary> {
95 get_cached_server_binary(container_dir).await
96 }
97
98 async fn installation_test_binary(
99 &self,
100 container_dir: PathBuf,
101 ) -> Option<LanguageServerBinary> {
102 get_cached_server_binary(container_dir)
103 .await
104 .map(|mut binary| {
105 binary.arguments = vec!["--version".into()];
106 binary
107 })
108 }
109}
110
111async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
112 async_iife!({
113 let mut last_binary_path = None;
114 let mut entries = fs::read_dir(&container_dir).await?;
115 while let Some(entry) = entries.next().await {
116 let entry = entry?;
117 if entry.file_type().await?.is_file()
118 && entry
119 .file_name()
120 .to_str()
121 .map_or(false, |name| name == "lua-language-server")
122 {
123 last_binary_path = Some(entry.path());
124 }
125 }
126
127 if let Some(path) = last_binary_path {
128 Ok(LanguageServerBinary {
129 path,
130 arguments: server_binary_arguments(),
131 })
132 } else {
133 Err(anyhow!("no cached binary"))
134 }
135 })
136 .await
137 .log_err()
138}