1use anyhow::{anyhow, Result};
  2use async_trait::async_trait;
  3use collections::HashMap;
  4use futures::StreamExt;
  5use gpui::AsyncAppContext;
  6use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};
  7use lsp::LanguageServerBinary;
  8use node_runtime::NodeRuntime;
  9use serde_json::{json, Value};
 10use smol::fs;
 11use std::{
 12    any::Any,
 13    ffi::OsString,
 14    path::{Path, PathBuf},
 15    sync::Arc,
 16};
 17use util::{maybe, ResultExt};
 18
 19const SERVER_PATH: &str = "node_modules/.bin/tailwindcss-language-server";
 20
 21fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 22    vec![server_path.into(), "--stdio".into()]
 23}
 24
 25pub struct TailwindLspAdapter {
 26    node: Arc<dyn NodeRuntime>,
 27}
 28
 29impl TailwindLspAdapter {
 30    pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
 31        TailwindLspAdapter { node }
 32    }
 33}
 34
 35#[async_trait(?Send)]
 36impl LspAdapter for TailwindLspAdapter {
 37    fn name(&self) -> LanguageServerName {
 38        LanguageServerName("tailwindcss-language-server".into())
 39    }
 40
 41    async fn fetch_latest_server_version(
 42        &self,
 43        _: &dyn LspAdapterDelegate,
 44    ) -> Result<Box<dyn 'static + Any + Send>> {
 45        Ok(Box::new(
 46            self.node
 47                .npm_package_latest_version("@tailwindcss/language-server")
 48                .await?,
 49        ) as Box<_>)
 50    }
 51
 52    async fn fetch_server_binary(
 53        &self,
 54        latest_version: Box<dyn 'static + Send + Any>,
 55        container_dir: PathBuf,
 56        _: &dyn LspAdapterDelegate,
 57    ) -> Result<LanguageServerBinary> {
 58        let latest_version = latest_version.downcast::<String>().unwrap();
 59        let server_path = container_dir.join(SERVER_PATH);
 60        let package_name = "@tailwindcss/language-server";
 61
 62        let should_install_language_server = self
 63            .node
 64            .should_install_npm_package(package_name, &server_path, &container_dir, &latest_version)
 65            .await;
 66
 67        if should_install_language_server {
 68            self.node
 69                .npm_install_packages(&container_dir, &[(package_name, latest_version.as_str())])
 70                .await?;
 71        }
 72
 73        Ok(LanguageServerBinary {
 74            path: self.node.binary_path().await?,
 75            env: None,
 76            arguments: server_binary_arguments(&server_path),
 77        })
 78    }
 79
 80    async fn cached_server_binary(
 81        &self,
 82        container_dir: PathBuf,
 83        _: &dyn LspAdapterDelegate,
 84    ) -> Option<LanguageServerBinary> {
 85        get_cached_server_binary(container_dir, &*self.node).await
 86    }
 87
 88    async fn installation_test_binary(
 89        &self,
 90        container_dir: PathBuf,
 91    ) -> Option<LanguageServerBinary> {
 92        get_cached_server_binary(container_dir, &*self.node).await
 93    }
 94
 95    async fn initialization_options(
 96        self: Arc<Self>,
 97        _: &Arc<dyn LspAdapterDelegate>,
 98    ) -> Result<Option<serde_json::Value>> {
 99        Ok(Some(json!({
100            "provideFormatter": true,
101            "userLanguages": {
102                "html": "html",
103                "css": "css",
104                "javascript": "javascript",
105                "typescriptreact": "typescriptreact",
106            },
107        })))
108    }
109
110    async fn workspace_configuration(
111        self: Arc<Self>,
112        _: &Arc<dyn LspAdapterDelegate>,
113        _cx: &mut AsyncAppContext,
114    ) -> Result<Value> {
115        Ok(json!({
116            "tailwindCSS": {
117                "emmetCompletions": true,
118            }
119        }))
120    }
121
122    fn language_ids(&self) -> HashMap<String, String> {
123        HashMap::from_iter([
124            ("Astro".to_string(), "astro".to_string()),
125            ("HTML".to_string(), "html".to_string()),
126            ("CSS".to_string(), "css".to_string()),
127            ("JavaScript".to_string(), "javascript".to_string()),
128            ("TSX".to_string(), "typescriptreact".to_string()),
129            ("Svelte".to_string(), "svelte".to_string()),
130            ("Elixir".to_string(), "phoenix-heex".to_string()),
131            ("HEEX".to_string(), "phoenix-heex".to_string()),
132            ("ERB".to_string(), "erb".to_string()),
133            ("PHP".to_string(), "php".to_string()),
134            ("Vue.js".to_string(), "vue".to_string()),
135        ])
136    }
137}
138
139async fn get_cached_server_binary(
140    container_dir: PathBuf,
141    node: &dyn NodeRuntime,
142) -> Option<LanguageServerBinary> {
143    maybe!(async {
144        let mut last_version_dir = None;
145        let mut entries = fs::read_dir(&container_dir).await?;
146        while let Some(entry) = entries.next().await {
147            let entry = entry?;
148            if entry.file_type().await?.is_dir() {
149                last_version_dir = Some(entry.path());
150            }
151        }
152        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
153        let server_path = last_version_dir.join(SERVER_PATH);
154        if server_path.exists() {
155            Ok(LanguageServerBinary {
156                path: node.binary_path().await?,
157                env: None,
158                arguments: server_binary_arguments(&server_path),
159            })
160        } else {
161            Err(anyhow!(
162                "missing executable in directory {:?}",
163                last_version_dir
164            ))
165        }
166    })
167    .await
168    .log_err()
169}