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