feat: add per-project hook file! If setting enableHooksFile is enabled you can add .vscode/ts-essentials.js file for taking full control of any languageService methods

Author: zardoy

src/configurationType.ts

@@ -647,6 +647,8 @@ export type Configuration = {
               typeAlias: string
               interface: string
           }
+    /** @default false */
+    enableHooksFile: boolean
 }
 
 // scrapped using search editor. config: caseInsensitive, context lines: 0, regex: const fix\w+ = "[^ ]+"

typescript/src/decorateProxy.ts

@@ -1,6 +1,7 @@
 import lodashGet from 'lodash.get'
 import { getCompletionsAtPosition, PrevCompletionMap, PrevCompletionsAdditionalData } from './completionsAtPosition'
 import { RequestInputTypes, TriggerCharacterCommand } from './ipcTypes'
+import { findChildContainingExactPosition, nodeModules } from './utils'
 import { getNavTreeItems } from './getPatchedNavTree'
 import decorateCodeActions from './codeActions/decorateProxy'
 import decorateSemanticDiagnostics from './semanticDiagnostics'
@@ -116,5 +117,32 @@ export const decorateLanguageService = (
     }
 
     languageService[thisPluginMarker] = true
+
+    if (!__WEB__ && c('enableHooksFile')) {
+        const projectRoot = languageServiceHost.getCurrentDirectory()
+        const hooksFilePath = nodeModules!.path.join(projectRoot, '.vscode/ts-essentials.js')
+        if (languageServiceHost.fileExists(hooksFilePath)) {
+            try {
+                proxy['original-proxy'] ??= { ...proxy }
+                const ls = proxy['original-proxy']
+                // eslint-disable-next-line @typescript-eslint/no-require-imports
+                const hooks = require(hooksFilePath)({
+                    ts,
+                    ls,
+                    languageService: ls,
+                    languageServiceHost,
+                    c,
+                    config,
+                    utils: {
+                        getNodeAtPosition: findChildContainingExactPosition,
+                    },
+                })
+                Object.assign(proxy, hooks)
+            } catch (err) {
+                console.warn('Failed to load hooks file', err) // todo issue
+            }
+        }
+    }
+
     return proxy
 }

typescript/src/index.ts

@@ -24,14 +24,16 @@ const plugin = ({ typescript }: Parameters<ts.server.PluginModuleFactory>[0]) =>
 
             // #region watch enablePlugin setting
             let prevPluginEnabledSetting = _configObj.config.enablePlugin
+            let prevHooksFile = _configObj.config.enableHooksFile
             updateConfigListeners.push(() => {
                 if ((prevPluginEnabledSetting === true || prevPluginEnabledSetting === undefined) && !_configObj.config.enablePlugin) {
                     // plugin got disabled, restore original languageService methods
                     // todo resetting doesn't work after tsconfig changes
                     getInitialProxy(info.languageService, proxy)
-                } else if (prevPluginEnabledSetting === false && _configObj.config.enablePlugin) {
+                } else if ((prevPluginEnabledSetting === false && _configObj.config.enablePlugin) || prevHooksFile !== _configObj.config.enableHooksFile) {
                     // plugin got enabled
                     decorateLanguageService(info, proxy, _configObj, _configObj.config?.['_additionalPluginOptions'])
+                    prevHooksFile = _configObj.config.enableHooksFile
                 }
 
                 prevPluginEnabledSetting = _configObj.config.enablePlugin