No ability to disable download results

[AladW]

aria2c --console-log-level=error https://aur.archlinux.org
[#18fe58 0B/0B CN:1 DL:0B]                                                                                                                                    
Download Results:
gid   |stat|avg speed  |path/URI
======+====+===========+=======================================================
18fe58|OK  |    10KiB/s|/home/archie/index.html

Status Legend:
(OK):download completed.

On error:

$ aria2c --console-log-level=error https://aur.archlinux.ofewewfrg

04/26 13:01:27 [ERROR] CUID#7 - Download aborted. URI=https://aur.archlinux.ofewewfrg
Exception: [AbstractCommand.cc:345] errorCode=19 URI=https://aur.archlinux.ofewewfrg
  -> [AbstractCommand.cc:783] errorCode=19 CUID#7 - Name resolution for aur.archlinux.ofewewfrg failed:Domain name not found

Download Results:
gid   |stat|avg speed  |path/URI
======+====+===========+=======================================================
874257|ERR |       0B/s|https://aur.archlinux.ofewewfrg

Status Legend:
(ERR):error occurred.

aria2 will resume download if the transfer is restarted.

Both download results and errors are printed on stdout (#638), so aria2c >/dev/null wouldn't have the desired result. A workaround in scripts/pipes is to save the log to a file, and mention the user to read it. Having the error printed directly, preferably to stderr, would be more effective.

[tatsuhiro-t]

Because of the backward compatibility, we cannot change stdout to stderr to display the download result. You may redirect stderr to stdout, and redirect stdout to file or /dev/null as a workaround.

[AladW]

Well, adding a switch to disable the download results wouldn't break backwards compability.

[tatsuhiro-t]

We have --download-result option. It currently accepts "default", and "full". Perhaps, we can add "hide" (or something like that) to disable download result.

[AladW]

That sounds good to me.

[tatsuhiro-t]

Fix committed via aa863fa

[AladW]

Works, thank you!

[sergeevabc]

$ aria2c https://domain.suffix/file.ext --checksum=sha-256=… --console-log-level=warn --download-result=hide

01  03/30 17:50:56 [ERROR] Checksum error detected. file=C:/…/file.ext                            
02                                                                                                
03  aria2 will resume download if the transfer is restarted.                                      
04  If there are any errors, then see the log file. See '-l' option in help/man page for details. 

How to hide lines 03–04? They annoy me.