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: &'static str =
 17    "node_modules/dockerfile-language-server-nodejs/bin/docker-langserver";
 18
 19fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 20    vec![server_path.into(), "--stdio".into()]
 21}
 22
 23pub struct DockerfileLspAdapter {
 24    node: Arc<dyn NodeRuntime>,
 25}
 26
 27impl DockerfileLspAdapter {
 28    pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
 29        Self { node }
 30    }
 31}
 32
 33#[async_trait]
 34impl LspAdapter for DockerfileLspAdapter {
 35    fn name(&self) -> LanguageServerName {
 36        LanguageServerName("docker-langserver".into())
 37    }
 38
 39    fn short_name(&self) -> &'static str {
 40        "dockerfile"
 41    }
 42
 43    async fn fetch_latest_server_version(
 44        &self,
 45        _: &dyn LspAdapterDelegate,
 46    ) -> Result<Box<dyn 'static + Send + Any>> {
 47        Ok(Box::new(
 48            self.node
 49                .npm_package_latest_version("dockerfile-language-server-nodejs")
 50                .await?,
 51        ) as Box<_>)
 52    }
 53
 54    async fn fetch_server_binary(
 55        &self,
 56        version: Box<dyn 'static + Send + Any>,
 57        container_dir: PathBuf,
 58        _: &dyn LspAdapterDelegate,
 59    ) -> Result<LanguageServerBinary> {
 60        let version = version.downcast::<String>().unwrap();
 61        let server_path = container_dir.join(SERVER_PATH);
 62
 63        if fs::metadata(&server_path).await.is_err() {
 64            self.node
 65                .npm_install_packages(
 66                    &container_dir,
 67                    &[("dockerfile-language-server-nodejs", version.as_str())],
 68                )
 69                .await?;
 70        }
 71
 72        Ok(LanguageServerBinary {
 73            path: self.node.binary_path().await?,
 74            env: None,
 75            arguments: server_binary_arguments(&server_path),
 76        })
 77    }
 78
 79    async fn cached_server_binary(
 80        &self,
 81        container_dir: PathBuf,
 82        _: &dyn LspAdapterDelegate,
 83    ) -> Option<LanguageServerBinary> {
 84        get_cached_server_binary(container_dir, &*self.node).await
 85    }
 86
 87    async fn installation_test_binary(
 88        &self,
 89        container_dir: PathBuf,
 90    ) -> Option<LanguageServerBinary> {
 91        get_cached_server_binary(container_dir, &*self.node).await
 92    }
 93}
 94
 95async fn get_cached_server_binary(
 96    container_dir: PathBuf,
 97    node: &dyn NodeRuntime,
 98) -> Option<LanguageServerBinary> {
 99    async_maybe!({
100        let mut last_version_dir = None;
101        let mut entries = fs::read_dir(&container_dir).await?;
102        while let Some(entry) = entries.next().await {
103            let entry = entry?;
104            if entry.file_type().await?.is_dir() {
105                last_version_dir = Some(entry.path());
106            }
107        }
108
109        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
110        let server_path = last_version_dir.join(SERVER_PATH);
111        if server_path.exists() {
112            Ok(LanguageServerBinary {
113                path: node.binary_path().await?,
114                env: None,
115                arguments: server_binary_arguments(&server_path),
116            })
117        } else {
118            Err(anyhow!(
119                "missing executable in directory {:?}",
120                last_version_dir
121            ))
122        }
123    })
124    .await
125    .log_err()
126}