1use anyhow::{anyhow, Context, 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::env::consts::ARCH;
 10use std::ffi::OsString;
 11use std::{any::Any, path::PathBuf};
 12use util::{github::latest_github_release, maybe};
 13use util::{github::GitHubLspBinaryVersion, ResultExt};
 14
 15pub struct OmniSharpAdapter;
 16
 17#[async_trait(?Send)]
 18impl super::LspAdapter for OmniSharpAdapter {
 19    fn name(&self) -> LanguageServerName {
 20        LanguageServerName("OmniSharp".into())
 21    }
 22
 23    async fn fetch_latest_server_version(
 24        &self,
 25        delegate: &dyn LspAdapterDelegate,
 26    ) -> Result<Box<dyn 'static + Send + Any>> {
 27        let mapped_arch = match ARCH {
 28            "aarch64" => Some("arm64"),
 29            "x86_64" => Some("x64"),
 30            _ => None,
 31        };
 32
 33        match mapped_arch {
 34            None => Ok(Box::new(())),
 35            Some(arch) => {
 36                let release = latest_github_release(
 37                    "OmniSharp/omnisharp-roslyn",
 38                    true,
 39                    false,
 40                    delegate.http_client(),
 41                )
 42                .await?;
 43                let asset_name = format!("omnisharp-osx-{}-net6.0.tar.gz", arch);
 44                let asset = release
 45                    .assets
 46                    .iter()
 47                    .find(|asset| asset.name == asset_name)
 48                    .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
 49                let version = GitHubLspBinaryVersion {
 50                    name: release.tag_name,
 51                    url: asset.browser_download_url.clone(),
 52                };
 53
 54                Ok(Box::new(version) as Box<_>)
 55            }
 56        }
 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        let binary_path = container_dir.join("omnisharp");
 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                .context("error downloading release")?;
 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        // todo("windows")
 80        #[cfg(not(windows))]
 81        {
 82            fs::set_permissions(
 83                &binary_path,
 84                <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
 85            )
 86            .await?;
 87        }
 88        Ok(LanguageServerBinary {
 89            path: binary_path,
 90            env: None,
 91            arguments: server_binary_arguments(),
 92        })
 93    }
 94
 95    async fn cached_server_binary(
 96        &self,
 97        container_dir: PathBuf,
 98        _: &dyn LspAdapterDelegate,
 99    ) -> Option<LanguageServerBinary> {
100        get_cached_server_binary(container_dir).await
101    }
102
103    async fn installation_test_binary(
104        &self,
105        container_dir: PathBuf,
106    ) -> Option<LanguageServerBinary> {
107        get_cached_server_binary(container_dir)
108            .await
109            .map(|mut binary| {
110                binary.arguments = vec!["--help".into()];
111                binary
112            })
113    }
114}
115
116async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
117    maybe!(async {
118        let mut last_binary_path = None;
119        let mut entries = fs::read_dir(&container_dir).await?;
120        while let Some(entry) = entries.next().await {
121            let entry = entry?;
122            if entry.file_type().await?.is_file()
123                && entry
124                    .file_name()
125                    .to_str()
126                    .map_or(false, |name| name == "omnisharp")
127            {
128                last_binary_path = Some(entry.path());
129            }
130        }
131
132        if let Some(path) = last_binary_path {
133            Ok(LanguageServerBinary {
134                path,
135                env: None,
136                arguments: server_binary_arguments(),
137            })
138        } else {
139            Err(anyhow!("no cached binary"))
140        }
141    })
142    .await
143    .log_err()
144}
145
146fn server_binary_arguments() -> Vec<OsString> {
147    vec!["-lsp".into()]
148}