1use anyhow::{anyhow, Result};
  2use async_trait::async_trait;
  3use collections::HashMap;
  4use futures::{
  5    future::{self, BoxFuture},
  6    FutureExt, StreamExt,
  7};
  8use gpui::AppContext;
  9use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};
 10use lsp::LanguageServerBinary;
 11use node_runtime::NodeRuntime;
 12use serde_json::{json, Value};
 13use smol::fs;
 14use std::{
 15    any::Any,
 16    ffi::OsString,
 17    path::{Path, PathBuf},
 18    sync::Arc,
 19};
 20use util::ResultExt;
 21
 22const SERVER_PATH: &'static str = "node_modules/.bin/tailwindcss-language-server";
 23
 24fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 25    vec![server_path.into(), "--stdio".into()]
 26}
 27
 28pub struct TailwindLspAdapter {
 29    node: Arc<dyn NodeRuntime>,
 30}
 31
 32impl TailwindLspAdapter {
 33    pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
 34        TailwindLspAdapter { node }
 35    }
 36}
 37
 38#[async_trait]
 39impl LspAdapter for TailwindLspAdapter {
 40    async fn name(&self) -> LanguageServerName {
 41        LanguageServerName("tailwindcss-language-server".into())
 42    }
 43
 44    fn short_name(&self) -> &'static str {
 45        "tailwind"
 46    }
 47
 48    async fn fetch_latest_server_version(
 49        &self,
 50        _: &dyn LspAdapterDelegate,
 51    ) -> Result<Box<dyn 'static + Any + Send>> {
 52        Ok(Box::new(
 53            self.node
 54                .npm_package_latest_version("@tailwindcss/language-server")
 55                .await?,
 56        ) as Box<_>)
 57    }
 58
 59    async fn fetch_server_binary(
 60        &self,
 61        version: Box<dyn 'static + Send + Any>,
 62        container_dir: PathBuf,
 63        _: &dyn LspAdapterDelegate,
 64    ) -> Result<LanguageServerBinary> {
 65        let version = version.downcast::<String>().unwrap();
 66        let server_path = container_dir.join(SERVER_PATH);
 67
 68        if fs::metadata(&server_path).await.is_err() {
 69            self.node
 70                .npm_install_packages(
 71                    &container_dir,
 72                    &[("@tailwindcss/language-server", version.as_str())],
 73                )
 74                .await?;
 75        }
 76
 77        Ok(LanguageServerBinary {
 78            path: self.node.binary_path().await?,
 79            arguments: server_binary_arguments(&server_path),
 80        })
 81    }
 82
 83    async fn cached_server_binary(
 84        &self,
 85        container_dir: PathBuf,
 86        _: &dyn LspAdapterDelegate,
 87    ) -> Option<LanguageServerBinary> {
 88        get_cached_server_binary(container_dir, &*self.node).await
 89    }
 90
 91    async fn installation_test_binary(
 92        &self,
 93        container_dir: PathBuf,
 94    ) -> Option<LanguageServerBinary> {
 95        get_cached_server_binary(container_dir, &*self.node).await
 96    }
 97
 98    async fn initialization_options(&self) -> Option<serde_json::Value> {
 99        Some(json!({
100            "provideFormatter": true,
101            "userLanguages": {
102                "html": "html",
103                "css": "css",
104                "javascript": "javascript",
105                "typescriptreact": "typescriptreact",
106            },
107        }))
108    }
109
110    fn workspace_configuration(&self, _: &mut AppContext) -> BoxFuture<'static, Value> {
111        future::ready(json!({
112            "tailwindCSS": {
113                "emmetCompletions": true,
114            }
115        }))
116        .boxed()
117    }
118
119    async fn language_ids(&self) -> HashMap<String, String> {
120        HashMap::from_iter(
121            [
122                ("HTML".to_string(), "html".to_string()),
123                ("CSS".to_string(), "css".to_string()),
124                ("JavaScript".to_string(), "javascript".to_string()),
125                ("TSX".to_string(), "typescriptreact".to_string()),
126            ]
127            .into_iter(),
128        )
129    }
130}
131
132async fn get_cached_server_binary(
133    container_dir: PathBuf,
134    node: &dyn NodeRuntime,
135) -> Option<LanguageServerBinary> {
136    (|| async move {
137        let mut last_version_dir = None;
138        let mut entries = fs::read_dir(&container_dir).await?;
139        while let Some(entry) = entries.next().await {
140            let entry = entry?;
141            if entry.file_type().await?.is_dir() {
142                last_version_dir = Some(entry.path());
143            }
144        }
145        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
146        let server_path = last_version_dir.join(SERVER_PATH);
147        if server_path.exists() {
148            Ok(LanguageServerBinary {
149                path: node.binary_path().await?,
150                arguments: server_binary_arguments(&server_path),
151            })
152        } else {
153            Err(anyhow!(
154                "missing executable in directory {:?}",
155                last_version_dir
156            ))
157        }
158    })()
159    .await
160    .log_err()
161}