1use anyhow::{anyhow, Result};
  2use async_trait::async_trait;
  3use futures::StreamExt;
  4use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};
  5use lsp::LanguageServerBinary;
  6use node_runtime::NodeRuntime;
  7use smol::fs;
  8use std::{
  9    any::Any,
 10    ffi::OsString,
 11    path::{Path, PathBuf},
 12    sync::Arc,
 13};
 14use util::{maybe, ResultExt};
 15
 16const SERVER_PATH: &str = "node_modules/dockerfile-language-server-nodejs/bin/docker-langserver";
 17
 18fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 19    vec![server_path.into(), "--stdio".into()]
 20}
 21
 22pub struct DockerfileLspAdapter {
 23    node: Arc<dyn NodeRuntime>,
 24}
 25
 26impl DockerfileLspAdapter {
 27    pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
 28        Self { node }
 29    }
 30}
 31
 32#[async_trait(?Send)]
 33impl LspAdapter for DockerfileLspAdapter {
 34    fn name(&self) -> LanguageServerName {
 35        LanguageServerName("docker-langserver".into())
 36    }
 37
 38    async fn fetch_latest_server_version(
 39        &self,
 40        _: &dyn LspAdapterDelegate,
 41    ) -> Result<Box<dyn 'static + Send + Any>> {
 42        Ok(Box::new(
 43            self.node
 44                .npm_package_latest_version("dockerfile-language-server-nodejs")
 45                .await?,
 46        ) as Box<_>)
 47    }
 48
 49    async fn fetch_server_binary(
 50        &self,
 51        latest_version: Box<dyn 'static + Send + Any>,
 52        container_dir: PathBuf,
 53        _: &dyn LspAdapterDelegate,
 54    ) -> Result<LanguageServerBinary> {
 55        let latest_version = latest_version.downcast::<String>().unwrap();
 56        let server_path = container_dir.join(SERVER_PATH);
 57        let package_name = "dockerfile-language-server-nodejs";
 58
 59        let should_install_language_server = self
 60            .node
 61            .should_install_npm_package(package_name, &server_path, &container_dir, &latest_version)
 62            .await;
 63
 64        if should_install_language_server {
 65            self.node
 66                .npm_install_packages(&container_dir, &[(package_name, latest_version.as_str())])
 67                .await?;
 68        }
 69
 70        Ok(LanguageServerBinary {
 71            path: self.node.binary_path().await?,
 72            env: None,
 73            arguments: server_binary_arguments(&server_path),
 74        })
 75    }
 76
 77    async fn cached_server_binary(
 78        &self,
 79        container_dir: PathBuf,
 80        _: &dyn LspAdapterDelegate,
 81    ) -> Option<LanguageServerBinary> {
 82        get_cached_server_binary(container_dir, &*self.node).await
 83    }
 84
 85    async fn installation_test_binary(
 86        &self,
 87        container_dir: PathBuf,
 88    ) -> Option<LanguageServerBinary> {
 89        get_cached_server_binary(container_dir, &*self.node).await
 90    }
 91}
 92
 93async fn get_cached_server_binary(
 94    container_dir: PathBuf,
 95    node: &dyn NodeRuntime,
 96) -> Option<LanguageServerBinary> {
 97    maybe!(async {
 98        let mut last_version_dir = None;
 99        let mut entries = fs::read_dir(&container_dir).await?;
100        while let Some(entry) = entries.next().await {
101            let entry = entry?;
102            if entry.file_type().await?.is_dir() {
103                last_version_dir = Some(entry.path());
104            }
105        }
106
107        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
108        let server_path = last_version_dir.join(SERVER_PATH);
109        if server_path.exists() {
110            Ok(LanguageServerBinary {
111                path: node.binary_path().await?,
112                env: None,
113                arguments: server_binary_arguments(&server_path),
114            })
115        } else {
116            Err(anyhow!(
117                "missing executable in directory {:?}",
118                last_version_dir
119            ))
120        }
121    })
122    .await
123    .log_err()
124}