From 5a8a7cdb622c8b607c2e7f52bc9f12917ee99622 Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Fri, 12 Jun 2020 16:18:31 +0200
Subject: [PATCH] exit after printing options or lists

---
 src/main.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index e37092b..dd308d1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -570,6 +570,7 @@ fn main() {
     let mut transcoder = Transcoder::new();
 
     let mut arg_idx = 1;
+    let mut printed_info = false;
     while arg_idx < args.len() {
         match args[arg_idx].as_str() {
             "--list-decoders" => {
@@ -583,6 +584,7 @@ fn main() {
                 } else {
                     println!("No registered decoders.");
                 }
+                printed_info = true;
             },
             "--list-encoders" => {
                 if enc_reg.iter().len() > 0 {
@@ -595,6 +597,7 @@ fn main() {
                 } else {
                     println!("No registered encoders.");
                 }
+                printed_info = true;
             },
             "--list-demuxers" => {
                 print!("Registered demuxers:");
@@ -602,6 +605,7 @@ fn main() {
                     print!(" {}", dmx.get_name());
                 }
                 println!();
+                printed_info = true;
             },
             "--list-muxers" => {
                 print!("Registered muxers:");
@@ -609,6 +613,7 @@ fn main() {
                     print!(" {}", mux.get_name());
                 }
                 println!();
+                printed_info = true;
             },
             "--query-decoder-options" => {
                 next_arg!(args, arg_idx);
@@ -620,6 +625,7 @@ fn main() {
                 } else {
                     println!("codec {} is not found", cname);
                 }
+                printed_info = true;
             },
             "--query-demuxer-options" => {
                 next_arg!(args, arg_idx);
@@ -633,6 +639,7 @@ fn main() {
                 } else {
                     println!("demuxer {} is not found", dname);
                 }
+                printed_info = true;
             },
             "--query-encoder-options" => {
                 next_arg!(args, arg_idx);
@@ -644,6 +651,7 @@ fn main() {
                 } else {
                     println!("codec {} is not found", cname);
                 }
+                printed_info = true;
             },
             "--query-muxer-options" => {
                 next_arg!(args, arg_idx);
@@ -658,6 +666,7 @@ fn main() {
                 } else {
                     println!("muxer {} is not found", name);
                 }
+                printed_info = true;
             },
             "--input" => {
                 next_arg!(args, arg_idx);
@@ -720,6 +729,10 @@ fn main() {
         arg_idx += 1;
     }
 
+    if printed_info {
+        return;
+    }
+
     if transcoder.input_name.len() == 0 {
         println!("no input name provided");
         return;
-- 
2.30.2