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/.bin/prisma-language-server";
 17
 18fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 19    vec![server_path.into(), "--stdio".into()]
 20}
 21
 22pub struct PrismaLspAdapter {
 23    node: Arc<dyn NodeRuntime>,
 24}
 25
 26impl PrismaLspAdapter {
 27    pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
 28        PrismaLspAdapter { node }
 29    }
 30}
 31
 32#[async_trait]
 33impl LspAdapter for PrismaLspAdapter {
 34    fn name(&self) -> LanguageServerName {
 35        LanguageServerName("prisma-language-server".into())
 36    }
 37
 38    async fn fetch_latest_server_version(
 39        &self,
 40        _: &dyn LspAdapterDelegate,
 41    ) -> Result<Box<dyn 'static + Any + Send>> {
 42        Ok(Box::new(
 43            self.node
 44                .npm_package_latest_version("@prisma/language-server")
 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                    &[("@prisma/language-server", 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    fn initialization_options(&self) -> Option<serde_json::Value> {
 90        None
 91    }
 92}
 93
 94async fn get_cached_server_binary(
 95    container_dir: PathBuf,
 96    node: &dyn NodeRuntime,
 97) -> Option<LanguageServerBinary> {
 98    async_maybe!({
 99        let mut last_version_dir = None;
100        let mut entries = fs::read_dir(&container_dir).await?;
101        while let Some(entry) = entries.next().await {
102            let entry = entry?;
103            if entry.file_type().await?.is_dir() {
104                last_version_dir = Some(entry.path());
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}