override console.log/error and catch unhandled rejections

packages/tailwindcss-intellisense/src/class-names/index.js

@@ -17,6 +17,7 @@ import normalizePath from 'normalize-path'
 import { withUserEnvironment } from './environment'
 import execa from 'execa'
 import { klona } from 'klona/full'
+import { formatError } from '../lsp/util/formatError'
 
 function arraysEqual(arr1, arr2) {
   return (
@@ -238,7 +239,7 @@ export default async function getClassNames(
     result = await run()
     console.log('Initialised successfully.')
   } catch (error) {
-    console.error('Failed to initialise:', error)
+    console.error(formatError('Failed to initialise:', error))
     return null
   }
 

packages/tailwindcss-intellisense/src/lsp/server.ts

@@ -36,12 +36,20 @@ import {
 import { createEmitter } from '../lib/emitter'
 import { registerDocumentColorProvider } from './providers/documentColorProvider'
 import { TextDocument } from 'vscode-languageserver-textdocument'
+import { formatError } from './util/formatError'
 
 let connection = createConnection(ProposedFeatures.all)
 const state: State = { enabled: false, emitter: createEmitter(connection) }
 let documents = new TextDocuments(TextDocument)
 let workspaceFolder: string | null
 
+console.log = connection.console.log.bind(connection.console)
+console.error = connection.console.error.bind(connection.console)
+
+process.on('unhandledRejection', (e: any) => {
+  connection.console.error(formatError(`Unhandled exception`, e))
+})
+
 const defaultSettings: Settings = {
   tabSize: 2,
   emmetCompletions: false,

packages/tailwindcss-intellisense/src/lsp/util/formatError.ts

@@ -0,0 +1,12 @@
+// https://github.com/vscode-langservers/vscode-json-languageserver/blob/master/src/utils/runner.ts
+export function formatError(message: string, err: any): string {
+  if (err instanceof Error) {
+    let error = <Error>err
+    return `${message}: ${error.message}\n${error.stack}`
+  } else if (typeof err === 'string') {
+    return `${message}: ${err}`
+  } else if (err) {
+    return `${message}: ${err.toString()}`
+  }
+  return message
+}