convert resolve to ts (tsx works inside child process)

Author: AtofStryker

packages/server/lib/modes/run.ts

@@ -1131,6 +1131,7 @@ async function ready (options: ReadyOptions) {
       socketId,
       parallel,
       onError,
+      // @ts-expect-error - browser is not typed correctly
       browser,
       project,
       runUrl,

packages/server/lib/util/resolve.js

@@ -0,0 +1,28 @@
+import debugModule from 'debug'
+const debug = debugModule('cypress:server:plugins')
+
+/**
+ * Resolves the path to 'typescript' module.
+ *
+ * @param {projectRoot} path to the project root
+ * @returns {string|null} path if typescript exists, otherwise null
+ */
+export const typescript = (projectRoot) => {
+  if (process.env['CYPRESS_INTERNAL_NO_TYPESCRIPT'] === '1' || !projectRoot) {
+    return null
+  }
+
+  try {
+    debug('resolving typescript with projectRoot %o', projectRoot)
+
+    const resolved = require.resolve('typescript', { paths: [projectRoot] })
+
+    debug('resolved typescript %s', resolved)
+
+    return resolved
+  } catch (e) {
+    debug('could not resolve typescript, error: %s', e.message)
+
+    return null
+  }
+}

packages/server/lib/util/resolve.ts

@@ -1,13 +1,19 @@
 const childProcess = require('child_process')
 const path = require('path')
 
+// load with tsx?
 const REQUIRE_ASYNC_CHILD_PATH = require.resolve('@packages/server/lib/plugins/child/require_async_child')
 
 let proc
 
 process.on('message', (msg) => {
   if (msg.msg === 'spawn') {
-    proc = childProcess.fork(REQUIRE_ASYNC_CHILD_PATH, ['--projectRoot', msg.data.projectRoot, '--file', path.join(msg.data.projectRoot, 'cypress.config.js')])
+    proc = childProcess.fork(REQUIRE_ASYNC_CHILD_PATH, ['--projectRoot', msg.data.projectRoot, '--file', path.join(msg.data.projectRoot, 'cypress.config.js')], {
+      env: {
+        NODE_OPTIONS: '--import tsx',
+      },
+    })
+
     proc.on('message', (msg) => {
       process.send({ childMessage: msg })
     })