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: &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    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        version: Box<dyn 'static + Send + Any>,
 55        container_dir: PathBuf,
 56        _: &dyn LspAdapterDelegate,
 57    ) -> Result<LanguageServerBinary> {
 58        let version = version.downcast::<String>().unwrap();
 59        let server_path = container_dir.join(SERVER_PATH);
 60
 61        if fs::metadata(&server_path).await.is_err() {
 62            self.node
 63                .npm_install_packages(
 64                    &container_dir,
 65                    &[("@tailwindcss/language-server", version.as_str())],
 66                )
 67                .await?;
 68        }
 69
 70        Ok(LanguageServerBinary {
 71            path: self.node.binary_path().await?,
 72            env: None,
 73            arguments: server_binary_arguments(&server_path),
 74        })
 75    }
 76
 77    async fn cached_server_binary(
 78        &self,
 79        container_dir: PathBuf,
 80        _: &dyn LspAdapterDelegate,
 81    ) -> Option<LanguageServerBinary> {
 82        get_cached_server_binary(container_dir, &*self.node).await
 83    }
 84
 85    async fn installation_test_binary(
 86        &self,
 87        container_dir: PathBuf,
 88    ) -> Option<LanguageServerBinary> {
 89        get_cached_server_binary(container_dir, &*self.node).await
 90    }
 91
 92    fn initialization_options(&self) -> Option<serde_json::Value> {
 93        Some(json!({
 94            "provideFormatter": true,
 95            "userLanguages": {
 96                "html": "html",
 97                "css": "css",
 98                "javascript": "javascript",
 99                "typescriptreact": "typescriptreact",
100            },
101        }))
102    }
103
104    fn workspace_configuration(&self, _workspace_root: &Path, _: &mut AppContext) -> Value {
105        json!({
106            "tailwindCSS": {
107                "emmetCompletions": true,
108            }
109        })
110    }
111
112    fn language_ids(&self) -> HashMap<String, String> {
113        HashMap::from_iter([
114            ("Astro".to_string(), "astro".to_string()),
115            ("HTML".to_string(), "html".to_string()),
116            ("CSS".to_string(), "css".to_string()),
117            ("JavaScript".to_string(), "javascript".to_string()),
118            ("TSX".to_string(), "typescriptreact".to_string()),
119            ("Svelte".to_string(), "svelte".to_string()),
120            ("Elixir".to_string(), "phoenix-heex".to_string()),
121            ("HEEX".to_string(), "phoenix-heex".to_string()),
122            ("ERB".to_string(), "erb".to_string()),
123            ("PHP".to_string(), "php".to_string()),
124        ])
125    }
126
127    fn prettier_plugins(&self) -> &[&'static str] {
128        &["prettier-plugin-tailwindcss"]
129    }
130}
131
132async fn get_cached_server_binary(
133    container_dir: PathBuf,
134    node: &dyn NodeRuntime,
135) -> Option<LanguageServerBinary> {
136    async_maybe!({
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                env: None,
151                arguments: server_binary_arguments(&server_path),
152            })
153        } else {
154            Err(anyhow!(
155                "missing executable in directory {:?}",
156                last_version_dir
157            ))
158        }
159    })
160    .await
161    .log_err()
162}