Add automatic support for multi-config workspaces, including `@config` resolution (#633)

* wip

* wip

* Boot client if a CSS file contains `@config`

* wip

* Check document exists

* wip

* Fix duplicate document selector

* wip

* Use enum for document selector priorities

* Delete unused functions

* Remove unused state type

* Share glob patterns

* Update config file glob

* fix logs

* Fix filename checks on Windows

* Don't show error popups

* wip

* handle negated content paths

* Handle non-tailwind dependency installs

* add package root to document selectors

* tidy

* wip

* dedupe document selectors

* Fix `@config` regex

* Fix document selectors when using `experimental.configFile`

* Remove log

packages/tailwindcss-language-server/src/lib/constants.ts

@@ -0,0 +1,3 @@
+export const CONFIG_GLOB = '{tailwind,tailwind.config,tailwind.*.config,tailwind.config.*}.{js,cjs}'
+export const PACKAGE_LOCK_GLOB = '{package-lock.json,yarn.lock,pnpm-lock.yaml}'
+export const CSS_GLOB = '*.{css,scss,sass,less,pcss}'

packages/tailwindcss-language-server/src/lsp/diagnosticsProvider.ts

@@ -20,15 +20,3 @@ export function clearDiagnostics(state: State, document: TextDocument): void {
     diagnostics: [],
   })
 }
-
-export function clearAllDiagnostics(state: State): void {
-  state.editor?.documents.all().forEach((document) => {
-    clearDiagnostics(state, document)
-  })
-}
-
-export function updateAllDiagnostics(state: State): void {
-  state.editor?.documents.all().forEach((document) => {
-    provideDiagnostics(state, document)
-  })
-}

packages/tailwindcss-language-server/src/util/error.ts

@@ -25,11 +25,11 @@ export function showError(
   message: string = 'Tailwind CSS'
 ): void {
   console.error(formatError(message, err))
-  if (!(err instanceof SilentError)) {
+  // if (!(err instanceof SilentError)) {
-    connection.sendNotification('@/tailwindCSS/error', {
+  //   connection.sendNotification('@/tailwindCSS/error', {
-      message: formatError(message, err, false),
+  //     message: formatError(message, err, false),
-    })
+  //   })
-  }
+  // }
 }
 
 export function SilentError(message: string) {

packages/tailwindcss-language-service/src/codeActions/codeActionProvider.ts

@@ -24,6 +24,7 @@ async function getDiagnosticsFromCodeActionParams(
   only?: DiagnosticKind[]
 ): Promise<AugmentedDiagnostic[]> {
   let document = state.editor.documents.get(params.textDocument.uri)
+  if (!document) return []
   let diagnostics = await doValidate(state, document, only)
 
   return params.context.diagnostics
@@ -40,6 +41,10 @@ async function getDiagnosticsFromCodeActionParams(
 }
 
 export async function doCodeActions(state: State, params: CodeActionParams): Promise<CodeAction[]> {
+  if (!state.enabled) {
+    return []
+  }
+
   let diagnostics = await getDiagnosticsFromCodeActionParams(
     state,
     params,

packages/tailwindcss-language-service/src/codeActions/provideInvalidApplyCodeActions.ts

@@ -25,6 +25,7 @@ export async function provideInvalidApplyCodeActions(
   diagnostic: InvalidApplyDiagnostic
 ): Promise<CodeAction[]> {
   let document = state.editor.documents.get(params.textDocument.uri)
+  if (!document) return []
   let documentText = getTextWithoutComments(document, 'css')
   let cssRange: Range
   let cssText = documentText

packages/tailwindcss-language-service/src/diagnostics/diagnosticsProvider.ts

@@ -50,29 +50,3 @@ export async function doValidate(
       ]
     : []
 }
-
-export async function provideDiagnostics(state: State, document: TextDocument) {
-  // state.editor.connection.sendDiagnostics({
-  //   uri: document.uri,
-  //   diagnostics: await doValidate(state, document),
-  // })
-}
-
-export function clearDiagnostics(state: State, document: TextDocument): void {
-  // state.editor.connection.sendDiagnostics({
-  //   uri: document.uri,
-  //   diagnostics: [],
-  // })
-}
-
-export function clearAllDiagnostics(state: State): void {
-  state.editor.documents.all().forEach((document) => {
-    clearDiagnostics(state, document)
-  })
-}
-
-export function updateAllDiagnostics(state: State): void {
-  state.editor.documents.all().forEach((document) => {
-    provideDiagnostics(state, document)
-  })
-}

packages/tailwindcss-language-service/src/util/state.ts

@@ -21,7 +21,6 @@ export type EditorState = {
   connection: Connection
   folder: string
   documents: TextDocuments<TextDocument>
-  globalSettings: Settings
   userLanguages: Record<string, string>
   capabilities: {
     configuration: boolean

packages/vscode-tailwindcss/src/extension.ts

@@ -42,14 +42,13 @@ import isObject from 'tailwindcss-language-service/src/util/isObject'
 import { dedupe, equal } from 'tailwindcss-language-service/src/util/array'
 import namedColors from 'color-name'
 import minimatch from 'minimatch'
+import { CONFIG_GLOB, CSS_GLOB } from 'tailwindcss-language-server/src/lib/constants'
 
 const colorNames = Object.keys(namedColors)
 
 const CLIENT_ID = 'tailwindcss-intellisense'
 const CLIENT_NAME = 'Tailwind CSS IntelliSense'
 
-const CONFIG_FILE_GLOB = '{tailwind,tailwind.config}.{js,cjs}'
-
 let clients: Map<string, LanguageClient> = new Map()
 let languages: Map<string, string[]> = new Map()
 let searchedFolders: Set<string> = new Set()
@@ -131,6 +130,11 @@ function mergeExcludes(settings: WorkspaceConfiguration, scope: ConfigurationSco
   }
 }
 
+async function fileContainsAtConfig(uri: Uri) {
+  let contents = (await Workspace.fs.readFile(uri)).toString()
+  return /@config\s*['"]/.test(contents)
+}
+
 export async function activate(context: ExtensionContext) {
   let module = context.asAbsolutePath(path.join('dist', 'server.js'))
   let prod = path.join('dist', 'tailwindServer.js')
@@ -206,20 +210,36 @@ export async function activate(context: ExtensionContext) {
   //   )
   // )
 
-  let watcher = Workspace.createFileSystemWatcher(`**/${CONFIG_FILE_GLOB}`, false, true, true)
+  let configWatcher = Workspace.createFileSystemWatcher(`**/${CONFIG_GLOB}`, false, true, true)
 
-  watcher.onDidCreate((uri) => {
+  configWatcher.onDidCreate((uri) => {
     let folder = Workspace.getWorkspaceFolder(uri)
-    if (!folder) {
+    if (!folder || isExcluded(uri.fsPath, folder)) {
       return
     }
-    if (!isExcluded(uri.fsPath, folder)) {
+    folder = getOuterMostWorkspaceFolder(folder)
+    bootWorkspaceClient(folder)
+  })
+
+  context.subscriptions.push(configWatcher)
+
+  let cssWatcher = Workspace.createFileSystemWatcher(`**/${CSS_GLOB}`, false, false, true)
+
+  async function bootClientIfCssFileContainsAtConfig(uri: Uri) {
+    let folder = Workspace.getWorkspaceFolder(uri)
+    if (!folder || isExcluded(uri.fsPath, folder)) {
+      return
+    }
+    if (await fileContainsAtConfig(uri)) {
       folder = getOuterMostWorkspaceFolder(folder)
       bootWorkspaceClient(folder)
     }
-  })
+  }
 
-  context.subscriptions.push(watcher)
+  cssWatcher.onDidCreate(bootClientIfCssFileContainsAtConfig)
+  cssWatcher.onDidChange(bootClientIfCssFileContainsAtConfig)
+
+  context.subscriptions.push(cssWatcher)
 
   // TODO: check if the actual language MAPPING changed
   // not just the language IDs
@@ -607,16 +627,27 @@ export async function activate(context: ExtensionContext) {
     searchedFolders.add(folder.uri.toString())
 
     let [configFile] = await Workspace.findFiles(
-      new RelativePattern(folder, `**/${CONFIG_FILE_GLOB}`),
+      new RelativePattern(folder, `**/${CONFIG_GLOB}`),
       `{${getExcludePatterns(folder).join(',')}}`,
       1
     )
 
-    if (!configFile) {
+    if (configFile) {
+      bootWorkspaceClient(folder)
       return
     }
 
+    let cssFiles = await Workspace.findFiles(
+      new RelativePattern(folder, `**/${CSS_GLOB}`),
+      `{${getExcludePatterns(folder).join(',')}}`
+    )
+
+    for (let cssFile of cssFiles) {
+      if (await fileContainsAtConfig(cssFile)) {
         bootWorkspaceClient(folder)
+        return
+      }
+    }
   }
 
   context.subscriptions.push(Workspace.onDidOpenTextDocument(didOpenTextDocument))