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::async_maybe;
 13use util::github::latest_github_release;
 14use util::{github::GitHubLspBinaryVersion, ResultExt};
 15
 16pub struct OmniSharpAdapter;
 17
 18#[async_trait]
 19impl super::LspAdapter for OmniSharpAdapter {
 20    fn name(&self) -> LanguageServerName {
 21        LanguageServerName("OmniSharp".into())
 22    }
 23
 24    fn short_name(&self) -> &'static str {
 25        "OmniSharp"
 26    }
 27
 28    async fn fetch_latest_server_version(
 29        &self,
 30        delegate: &dyn LspAdapterDelegate,
 31    ) -> Result<Box<dyn 'static + Send + Any>> {
 32        let mapped_arch = match ARCH {
 33            "aarch64" => Some("arm64"),
 34            "x86_64" => Some("x64"),
 35            _ => None,
 36        };
 37
 38        match mapped_arch {
 39            None => Ok(Box::new(())),
 40            Some(arch) => {
 41                let release = latest_github_release(
 42                    "OmniSharp/omnisharp-roslyn",
 43                    true,
 44                    false,
 45                    delegate.http_client(),
 46                )
 47                .await?;
 48                let asset_name = format!("omnisharp-osx-{}-net6.0.tar.gz", arch);
 49                let asset = release
 50                    .assets
 51                    .iter()
 52                    .find(|asset| asset.name == asset_name)
 53                    .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
 54                let version = GitHubLspBinaryVersion {
 55                    name: release.tag_name,
 56                    url: asset.browser_download_url.clone(),
 57                };
 58
 59                Ok(Box::new(version) as Box<_>)
 60            }
 61        }
 62    }
 63
 64    async fn fetch_server_binary(
 65        &self,
 66        version: Box<dyn 'static + Send + Any>,
 67        container_dir: PathBuf,
 68        delegate: &dyn LspAdapterDelegate,
 69    ) -> Result<LanguageServerBinary> {
 70        let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
 71        let binary_path = container_dir.join("omnisharp");
 72
 73        if fs::metadata(&binary_path).await.is_err() {
 74            let mut response = delegate
 75                .http_client()
 76                .get(&version.url, Default::default(), true)
 77                .await
 78                .context("error downloading release")?;
 79            let decompressed_bytes = GzipDecoder::new(BufReader::new(response.body_mut()));
 80            let archive = Archive::new(decompressed_bytes);
 81            archive.unpack(container_dir).await?;
 82        }
 83
 84        // todo!("windows")
 85        #[cfg(not(windows))]
 86        {
 87            fs::set_permissions(
 88                &binary_path,
 89                <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
 90            )
 91            .await?;
 92        }
 93        Ok(LanguageServerBinary {
 94            path: binary_path,
 95            env: None,
 96            arguments: server_binary_arguments(),
 97        })
 98    }
 99
100    async fn cached_server_binary(
101        &self,
102        container_dir: PathBuf,
103        _: &dyn LspAdapterDelegate,
104    ) -> Option<LanguageServerBinary> {
105        get_cached_server_binary(container_dir).await
106    }
107
108    async fn installation_test_binary(
109        &self,
110        container_dir: PathBuf,
111    ) -> Option<LanguageServerBinary> {
112        get_cached_server_binary(container_dir)
113            .await
114            .map(|mut binary| {
115                binary.arguments = vec!["--help".into()];
116                binary
117            })
118    }
119}
120
121async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
122    async_maybe!({
123        let mut last_binary_path = None;
124        let mut entries = fs::read_dir(&container_dir).await?;
125        while let Some(entry) = entries.next().await {
126            let entry = entry?;
127            if entry.file_type().await?.is_file()
128                && entry
129                    .file_name()
130                    .to_str()
131                    .map_or(false, |name| name == "omnisharp")
132            {
133                last_binary_path = Some(entry.path());
134            }
135        }
136
137        if let Some(path) = last_binary_path {
138            Ok(LanguageServerBinary {
139                path,
140                env: None,
141                arguments: server_binary_arguments(),
142            })
143        } else {
144            Err(anyhow!("no cached binary"))
145        }
146    })
147    .await
148    .log_err()
149}
150
151fn server_binary_arguments() -> Vec<OsString> {
152    vec!["-lsp".into()]
153}