1use anyhow::{anyhow, Result};
  2use async_trait::async_trait;
  3use collections::HashMap;
  4use futures::StreamExt;
  5use gpui::AppContext;
  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::{async_maybe, ResultExt};
 18
 19const SERVER_PATH: &'static 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]
 36impl LspAdapter for TailwindLspAdapter {
 37    fn name(&self) -> LanguageServerName {
 38        LanguageServerName("tailwindcss-language-server".into())
 39    }
 40
 41    fn short_name(&self) -> &'static str {
 42        "tailwind"
 43    }
 44
 45    async fn fetch_latest_server_version(
 46        &self,
 47        _: &dyn LspAdapterDelegate,
 48    ) -> Result<Box<dyn 'static + Any + Send>> {
 49        Ok(Box::new(
 50            self.node
 51                .npm_package_latest_version("@tailwindcss/language-server")
 52                .await?,
 53        ) as Box<_>)
 54    }
 55
 56    async fn fetch_server_binary(
 57        &self,
 58        version: Box<dyn 'static + Send + Any>,
 59        container_dir: PathBuf,
 60        _: &dyn LspAdapterDelegate,
 61    ) -> Result<LanguageServerBinary> {
 62        let version = version.downcast::<String>().unwrap();
 63        let server_path = container_dir.join(SERVER_PATH);
 64
 65        if fs::metadata(&server_path).await.is_err() {
 66            self.node
 67                .npm_install_packages(
 68                    &container_dir,
 69                    &[("@tailwindcss/language-server", version.as_str())],
 70                )
 71                .await?;
 72        }
 73
 74        Ok(LanguageServerBinary {
 75            path: self.node.binary_path().await?,
 76            env: None,
 77            arguments: server_binary_arguments(&server_path),
 78        })
 79    }
 80
 81    async fn cached_server_binary(
 82        &self,
 83        container_dir: PathBuf,
 84        _: &dyn LspAdapterDelegate,
 85    ) -> Option<LanguageServerBinary> {
 86        get_cached_server_binary(container_dir, &*self.node).await
 87    }
 88
 89    async fn installation_test_binary(
 90        &self,
 91        container_dir: PathBuf,
 92    ) -> Option<LanguageServerBinary> {
 93        get_cached_server_binary(container_dir, &*self.node).await
 94    }
 95
 96    fn initialization_options(&self) -> Option<serde_json::Value> {
 97        Some(json!({
 98            "provideFormatter": true,
 99            "userLanguages": {
100                "html": "html",
101                "css": "css",
102                "javascript": "javascript",
103                "typescriptreact": "typescriptreact",
104            },
105        }))
106    }
107
108    fn workspace_configuration(&self, _workspace_root: &Path, _: &mut AppContext) -> Value {
109        json!({
110            "tailwindCSS": {
111                "emmetCompletions": true,
112            }
113        })
114    }
115
116    fn language_ids(&self) -> HashMap<String, String> {
117        HashMap::from_iter([
118            ("Astro".to_string(), "astro".to_string()),
119            ("HTML".to_string(), "html".to_string()),
120            ("CSS".to_string(), "css".to_string()),
121            ("JavaScript".to_string(), "javascript".to_string()),
122            ("TSX".to_string(), "typescriptreact".to_string()),
123            ("Svelte".to_string(), "svelte".to_string()),
124            ("Elixir".to_string(), "phoenix-heex".to_string()),
125            ("HEEX".to_string(), "phoenix-heex".to_string()),
126            ("ERB".to_string(), "erb".to_string()),
127            ("PHP".to_string(), "php".to_string()),
128        ])
129    }
130
131    fn prettier_plugins(&self) -> &[&'static str] {
132        &["prettier-plugin-tailwindcss"]
133    }
134}
135
136async fn get_cached_server_binary(
137    container_dir: PathBuf,
138    node: &dyn NodeRuntime,
139) -> Option<LanguageServerBinary> {
140    async_maybe!({
141        let mut last_version_dir = None;
142        let mut entries = fs::read_dir(&container_dir).await?;
143        while let Some(entry) = entries.next().await {
144            let entry = entry?;
145            if entry.file_type().await?.is_dir() {
146                last_version_dir = Some(entry.path());
147            }
148        }
149        let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
150        let server_path = last_version_dir.join(SERVER_PATH);
151        if server_path.exists() {
152            Ok(LanguageServerBinary {
153                path: node.binary_path().await?,
154                env: None,
155                arguments: server_binary_arguments(&server_path),
156            })
157        } else {
158            Err(anyhow!(
159                "missing executable in directory {:?}",
160                last_version_dir
161            ))
162        }
163    })
164    .await
165    .log_err()
166}