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::{async_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]
 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        version: Box<dyn 'static + Send + Any>,
 52        container_dir: PathBuf,
 53        _: &dyn LspAdapterDelegate,
 54    ) -> Result<LanguageServerBinary> {
 55        let version = version.downcast::<String>().unwrap();
 56        let server_path = container_dir.join(SERVER_PATH);
 57
 58        if fs::metadata(&server_path).await.is_err() {
 59            self.node
 60                .npm_install_packages(
 61                    &container_dir,
 62                    &[("dockerfile-language-server-nodejs", version.as_str())],
 63                )
 64                .await?;
 65        }
 66
 67        Ok(LanguageServerBinary {
 68            path: self.node.binary_path().await?,
 69            env: None,
 70            arguments: server_binary_arguments(&server_path),
 71        })
 72    }
 73
 74    async fn cached_server_binary(
 75        &self,
 76        container_dir: PathBuf,
 77        _: &dyn LspAdapterDelegate,
 78    ) -> Option<LanguageServerBinary> {
 79        get_cached_server_binary(container_dir, &*self.node).await
 80    }
 81
 82    async fn installation_test_binary(
 83        &self,
 84        container_dir: PathBuf,
 85    ) -> Option<LanguageServerBinary> {
 86        get_cached_server_binary(container_dir, &*self.node).await
 87    }
 88}
 89
 90async fn get_cached_server_binary(
 91    container_dir: PathBuf,
 92    node: &dyn NodeRuntime,
 93) -> Option<LanguageServerBinary> {
 94    async_maybe!({
 95        let mut last_version_dir = None;
 96        let mut entries = fs::read_dir(&container_dir).await?;
 97        while let Some(entry) = entries.next().await {
 98            let entry = entry?;
 99            if entry.file_type().await?.is_dir() {
100                last_version_dir = Some(entry.path());
101            }
102        }
103
104        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
105        let server_path = last_version_dir.join(SERVER_PATH);
106        if server_path.exists() {
107            Ok(LanguageServerBinary {
108                path: node.binary_path().await?,
109                env: None,
110                arguments: server_binary_arguments(&server_path),
111            })
112        } else {
113            Err(anyhow!(
114                "missing executable in directory {:?}",
115                last_version_dir
116            ))
117        }
118    })
119    .await
120    .log_err()
121}