zinnia: add restart module on inactivity (#433)

* zinnia: add restart module on inactivity

* reorder

* clear timeout on abort

lib/zinnia.js

@@ -365,8 +365,23 @@ export async function run ({
     )
     childProcesses.push(Object.assign(childProcess, { moduleName: module }))
 
+    let timeoutId
+    const resetTimeout = () => {
+      clearTimeout(timeoutId)
+      timeoutId = setTimeout(() => {
+        onActivity({
+          type: 'error',
+          message: `${capitalize(module)} has been inactive for 5 minutes, restarting...`
+        })
+        controller.abort()
+      }, 5 * 60 * 1000)
+    }
+    resetTimeout()
+    signal.addEventListener('abort', () => clearTimeout(timeoutId))
+
     childProcess.stdout.setEncoding('utf-8')
     childProcess.stdout.on('data', data => {
+      resetTimeout()
       handleEvents({
         module,
         contracts,
@@ -379,7 +394,11 @@ export async function run ({
         Sentry.captureException(err)
       })
     })
-    childProcess.stderr.pipe(process.stderr, { end: false })
+    childProcess.stderr.setEncoding('utf-8')
+    childProcess.stderr.on('data', data => {
+      resetTimeout()
+      process.stderr.write(data)
+    })
 
     childProcess.on('exit', (code, signal) => {
       const exitReason = signal ? `via signal ${signal}` : `with code: ${code}`