Added flag '-i' which makes go-sendxmpp work with 'tail -f'.

README.md

@@ -46,6 +46,7 @@ Usage: go-sendxmpp [-cdtx] [-f value] [--help] [-j value] [-p value] [-r value]
  -d, --debug        Show debugging info.
  -f, --file=value   Set configuration file. (Default: ~/.sendxmpprc)
      --help         Show help.
+ -i, --interactive  Interactive mode (for use with e.g. 'tail -f').
  -j, --jserver=value
                     XMPP server address.
  -m, --message=value
@@ -59,6 +60,7 @@ Usage: go-sendxmpp [-cdtx] [-f value] [--help] [-j value] [-p value] [-r value]
  -u, --username=value
                     Username for XMPP account.
  -x, --start-tls    Use StartTLS.
+
 ```
 
 ### examples
@@ -80,3 +82,9 @@ Send a message to two groupchats (`-c`) using a configuration file.
 ```bash
 cat message.txt | ./go-sendxmpp -cf ./sendxmpp chat1@conference.example.com chat2@conference.example.com
 ```
+
+Send file changes to two groupchats (`-c`) using a configuration file.
+
+```bash
+tail -f example.log | ./go-sendxmpp -cif ./sendxmpp chat1@conference.example.com chat2@conference.example.com
+```

go-sendxmpp.go

@@ -189,6 +189,7 @@ func main() {
 		"When sending to a chatroom this is used as 'alias'. (Default: go-sendxmpp)")
 	flagFile := getopt.StringLong("file", 'f', "", "Set configuration file. (Default: ~/.sendxmpprc)")
 	flagMessageFile := getopt.StringLong("message", 'm', "", "Set file including the message.")
+	flagInteractive := getopt.BoolLong("interactive", 'i', "Interactive mode (for use with e.g. 'tail -f').")
 
 	// Parse command line flags.
 	getopt.Parse()
@@ -273,6 +274,8 @@ func main() {
 		log.Fatal(err)
 	}
 
+	// Skip reading message if '-i' or '--interactive' is set to work with e.g. 'tail -f'.
+	if *flagInteractive == false {
 		if message == "" {
 
 			scanner := bufio.NewScanner(os.Stdin)
@@ -291,6 +294,7 @@ func main() {
 				}
 			}
 		}
+	}
 
 	// Send message to chatroom(s) if the flag is set.
 	if *flagChatroom {
@@ -307,13 +311,32 @@ func main() {
 			if mucStatus > 300 {
 				log.Fatal("Couldn't join MUC. Status:", mucStatus)
 			}
+		}
 
+		// Send in endless loop (for usage with e.g. "tail -f").
+		if *flagInteractive == true {
+			for {
+				scanner := bufio.NewScanner(os.Stdin)
+				scanner.Scan()
+				message = scanner.Text()
+				for _, recipient := range recipients {
+					_, err = client.Send(xmpp.Chat{Remote: recipient, Type: "groupchat", Text: message})
+					if err != nil {
+						log.Fatal(err)
+					}
+				}
+			}
+		} else {
 			// Send the message.
+			for _, recipient := range recipients {
 				_, err = client.Send(xmpp.Chat{Remote: recipient, Type: "groupchat", Text: message})
 				if err != nil {
 					log.Fatal(err)
 				}
+			}
+		}
 
+		for _, recipient := range recipients {
 			// After sending the message, leave the Muc
 			_, err = client.LeaveMUC(recipient)
 			if err != nil {
@@ -321,15 +344,30 @@ func main() {
 			}
 		}
 	} else {
+		// If the chatroom flag is not set, send message to contact(s).
 
+		// Send in endless loop (for usage with e.g. "tail -f").
+		if *flagInteractive == true {
+			for {
+				scanner := bufio.NewScanner(os.Stdin)
+				scanner.Scan()
+				message = scanner.Text()
 				for _, recipient := range recipients {
-
-			// If the chatroom flag is not set, send message to contact(s).
 					_, err = client.Send(xmpp.Chat{Remote: recipient, Type: "chat", Text: message})
 					if err != nil {
 						log.Fatal(err)
 					}
 				}
 			}
+		} else {
+			for _, recipient := range recipients {
+				_, err = client.Send(xmpp.Chat{Remote: recipient, Type: "chat", Text: message})
+				if err != nil {
+					log.Fatal(err)
+				}
+			}
+		}
+	}
+
 	time.Sleep(1 * time.Second)
 }