fix(cli): support pub multiple lines on pipeline

cli/src/lib/pub.ts

@@ -197,6 +197,46 @@ const multiSend = (
   })
 }
 
+const handlePipedMultiline = (connOpts: IClientOptions, pubOpts: { topic: string; opts: IClientPublishOptions }) => {
+  const client = mqtt.connect(connOpts)
+  let messageQueue: string[] = []
+  let publishedCount = 0
+
+  process.stdin.pipe(split2()).on('data', (chunk) => {
+    const message = chunk.toString()
+    if (message.length > 0) {
+      messageQueue.push(message)
+    }
+  })
+
+  client.on('connect', () => {
+    basicLog.connected()
+    if (messageQueue.length > 0) {
+      logWrapper.await(`Publishing ${messageQueue.length} messages...`)
+      messageQueue.forEach((message) => {
+        client.publish(pubOpts.topic, Buffer.from(message), pubOpts.opts, (err) => {
+          if (err) {
+            basicLog.error(err)
+          } else {
+            publishedCount++
+            if (publishedCount === messageQueue.length) {
+              logWrapper.success(`Successfully published ${publishedCount} messages`)
+            }
+          }
+        })
+      })
+      setTimeout(() => {
+        client.end()
+      }, 1000)
+    }
+  })
+
+  client.on('error', (err) => {
+    basicLog.error(err)
+    client.end()
+  })
+}
+
 const handleFileRead = (filePath: string) => {
   try {
     basicLog.fileReading()
@@ -231,16 +271,21 @@ const pub = (options: PublishOptions) => {
   const pubOpts = parsePublishOptions(options)
 
   const handleStdin = () => {
-    if (options.multiline) {
-      multiSend(loadOptions, connOpts, pubOpts, options.maximumReconnectTimes)
-    } else {
-      process.stdin.pipe(
+    // One line mode
+    if (!options.multiline) {
+      return process.stdin.pipe(
         concat((data) => {
           pubOpts.message = data
           send(loadOptions, connOpts, pubOpts, options.maximumReconnectTimes)
         }),
       )
     }
+
+    // Multiline mode
+    const isPiped = !process.stdin.isTTY
+    return isPiped
+      ? handlePipedMultiline(connOpts, pubOpts)
+      : multiSend(loadOptions, connOpts, pubOpts, options.maximumReconnectTimes)
   }
 
   if (options.fileRead) {